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Covestro Deutschland Ag patents


Recent patent applications related to Covestro Deutschland Ag. Covestro Deutschland Ag is listed as an Agent/Assignee. Note: Covestro Deutschland Ag may have other listings under different names/spellings. We're not affiliated with Covestro Deutschland Ag, we're just tracking patents.

ARCHIVE: New 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 | Company Directory "C" | Covestro Deutschland Ag-related inventors


 new patent  Polycarbonate compositions for galvanic applications having a high requirement for heat distortion point

The invention relates to compositions consisting of a) 70 to 90 parts by weight of at least one polycarbonate, b) 10 to 30 parts by weight of at least one graft polymer containing a rubber-elastic particulate graft base, which contains diene, and containing a vinyl co(polymer) shell, c) 0 to 15 parts by weight of at least one additive, wherein the sum of the parts by weight of components a) and b) in the composition is normalized to 100, (i) characterized in that the rubber content from component b in the composition is at least 6 wt %, (ii) characterized in that the ratio k/s of the proportions by weight of rubber-elastic particulate graft base containing diene from component b) in the composition (═k) to the sum of free vinyl (co)polymer from component b), i.e., vinyl (co)polymer from component b) not covalently bonded to the rubber base in the graft polymer according to component b), and any free vinyl (co)polymer from component c) in the composition (═s) is at least 1.5, (iii) characterized in that the component a) contains at least one monomer unit selected from the group consisting of monomer units described by general formula (2), in which r4 represents h, linear or branched c1-c10 alkyl, preferably linear or branched c1-c6 alkyl, especially preferably linear or branched c1-c4 alkyl, exceedingly preferably h or c1 alkyl (methyl), and r5 represents linear or branched c1-c10 alkyl, preferably linear or branched c1-c6 alkyl, especially preferably linear or branched c1-c4 alkyl, exceedingly preferably c1 alkyl (methyl), and contains at least one monomer unit that is derived from a bis-(4-hydroxyphenyl) compound and that is bridged over the 1,1′ position of a cyclic hydrocarbon possibly substituted with heteroatoms, (iv) characterized in that the proportion (acyc) of monomer units that are derived from bis-(4-hydroxyphenyl) compounds and that are bridged over the 1,1′ position of a cyclic hydrocarbon possibly substituted with heteroatoms, with respect to the sum of all monomer units derived from bisphenols in the component a), is in the range of 5 to 40 wt %, and (v) characterized in that the component a) has a relative solution viscosity of 1.20 to 1.28, determined according to din 51562 in methylene chloride. The invention further relates to the use of the compositions to produce components containing a plastic carrier and a multi-ply metal layer, and to molded bodies produced from the compositions.. ... Covestro Deutschland Ag

 new patent  Boron nitride-containing thermoplastic composition

The present invention relates to thermally conductive compositions based on a thermoplastic polymer and boron nitride. The compositions contain at least one diglycerol ester to improve flow. ... Covestro Deutschland Ag

 new patent  Boron nitride hybrid material-containing thermoplastic composition

The present invention relates to a thermally conductive composition based on a thermoplastic polymer and a hybrid boron nitride material. The compositions contain at least one diglycerol ester to improve flow. ... Covestro Deutschland Ag

 new patent  Method for producing isocyanates

The invention relates to a method for producing isocyanates by reacting primary amines with phosgene in a stoichiometric excess in the gas phase, wherein the excess phosgene is subsequently recovered and recirculated back into the reaction. The present invention relates in particular to a method for the feedback-controlled recirculation of the recovered phosgene, particularly when the phosgene stream that should be recovered is distributed between multiple gas-phase reactors operated in parallel.. ... Covestro Deutschland Ag

Indirect lighting arrangement, and method for producing an indirect lighting arrangement

The invention relates to an indirect lighting arrangement (2, 2.1, 2.2, 2.3, 2.4, 2.5) comprising at least one cylindrical waveguide (4). At least one end (12.1, 12.2) of the cylindrical waveguide (4) is designed to couple light from a first light source (1) into the cylindrical waveguide (4), and the lateral surface (10) of the cylindrical wave guide (4) has a coupling section (6) which is designed to optically couple the cylindrical waveguide (4) to an arrangeable plate-shaped waveguide (16). ... Covestro Deutschland Ag

Metallizable, scratch-resistant and solvent-resistant film

The present invention relates to a coating composition comprising at least one thermoplastic acrylonitrile-butadiene-styrene copolymer in a content of at least 30% by weight of the solids content of the coating composition, at least one uv-curable reactive diluent in a content of at least 30% by weight of the solids content of the coating composition, at least one photoinitiator in a content of ≥0.1 to ≤10 parts by weight of the solids content of the coating composition and at least one organic solvent, where the proportion of ethylenically unsaturated groups is at least 3 mol per kg of the solids content of the coating composition. This is used to provide films and mouldings coated therewith, having a metallizable, scratch-resistant and solvent-resistant surface.. ... Covestro Deutschland Ag

Substituted triazines and a method for producing same

The present invention provides aromatic 4,6-bis-trichloromethyl-s-triazin-2-yl compounds of formula (i), a process for producing para-disubstituted benzonitriles as precursor to give compounds of formula (i) and a process for the production thereof.. . ... Covestro Deutschland Ag

Process for providing hydrogen chloride for chemical reactions

The invention relates to an improved process for making available the coproduct hydrogen chloride obtained in the preparation of an isocyanate by phosgenation of the corresponding amine for a desired subsequent use (i.e. A chemical reaction), in which part of the total hydrogen chloride obtained is isolated in gaseous form at a pressure which is higher than the pressure desired for the subsequent use of the hydrogen chloride by lowering the pressure of the crude product from the phosgenation and the remaining part of the total hydrogen chloride obtained is separated off at a pressure lower than that desired for the subsequent use from the liquid crude product from the phosgenation remaining after lowering of the pressure and is subsequently compressed to a pressure which is higher than that desired for the subsequent use, and in which the two hydrogen chloride streams obtained in this way are, preferably together after having been combined, purified so as to give a purified hydrogen chloride at a pressure which is higher than the pressure desired for the subsequent use.. ... Covestro Deutschland Ag

Osmotic distillation process for concentrating a liquid containing sodium chloride

Described is an osmotic distillation process for concentrating a liquid containing sodium chloride, and in particular a treatment process for used reaction water containing sodium chloride from the production of polymers.. . ... Covestro Deutschland Ag

Process for purifying raw-material gases by fractionation

The present invention relates to a process for purifying raw-material gases by fractionation. In particular, the present invention relates to a process for cleansing chlorine gas of bromine.. ... Covestro Deutschland Ag

Method for producing 3-d objects

The invention relates to a method for producing a three-dimensional object, the outer surface of which comprises at least one surface segment that is created in that a surface segment in two-dimensional form is first produced on a flat base plate by means of an additive manufacturing method (layer-building shaping method), comprising the following steps: i) applying at least one curable polymer or curable reaction resin in flowable form as material webs to a flat base plate by means of a layer-building shaping method in order to create a first layer; ii) applying a second layer to the first layer, which second layer is created by means of the same layer-building shaping method as in step i); iii) optionally applying 1 to 198 further layers, which are created in accordance with step ii), wherein in each case a new layer is applied to the previous layer; iv) curing the layers; v) detaching the cured surface segment from the flat base plate; and vi) shaping the cured surface segment into a three-dimensional object by means of deep-drawing or thermoforming; wherein at least one layer is created with a modulus of elasticity in the cured state of=500 mpa according to en iso 527-1 (last issue from april 1996, current iso version from february 2012) by applying at least one curable polymer or curable reaction resin in flowable form as material webs to the particular substratum.. . ... Covestro Deutschland Ag

Substituted triazines

. . . . The present invention provides aromatic 4,6-bis-trichloromethyl-s-triazin-2-yl compounds of formula (i). Further subjects of the invention are a photopolymer formulation comprising a photopolymerizable component and at least one aromatic 4,6-bis-trichloromethyl-s-triazin-2-yl compound of formula (i) and a photopolymer comprising matrix polymers, a writing monomer, a photoinitiator and at least one aromatic 4,6-bis-trichloromethyl-s-triazin-2-yl compound of formula (i), a holographic medium comprising the corresponding photopolymer of the present invention, a hologram comprising a holographic medium of the present invention, a process for producing a hologram via pulsed laser radiation, and also to the use of a holographic medium of the present invention to record holograms.. ... Covestro Deutschland Ag

New triazine as photo initiators and their preparation

The present invention relates to new triazine photoinitiators, a new process for their preparation, and a photopolymer composition comprising a photopolymerizable component and the new triazine photoinitiators. Further aspects of the present invention are a photopolymer comprising said photopolymer composition, a holographic medium which comprises such a photopolymer, a hologram comprising the holographic medium, and a device such a display, chip card, security document, bank note and/or holographic optical element comprising said hologram.. ... Covestro Deutschland Ag

Copolycarbonate compositions with cyclic and linear oligomers and improved optical properties

The invention relates to copolycarbonate compositions having cyclic and linear oligomers and improved optical properties, to their use for producing blends and moldings and to moldings obtained therewith.. . ... Covestro Deutschland Ag

06/28/18 / #20180179323

Polyurethane systems for layer structures in wind turbines

The invention relates to a new polyurethane system which can be advantageously used for the production of large structural components made of fiber composite materials, to the use of said polyurethane reaction system for the production of fiber-reinforced structural components, and to the fiber-reinforced structural components produced using the new polyurethane system.. . ... Covestro Deutschland Ag

06/28/18 / #20180179150

Process for preparing polyisocyanates

The present invention relates to a continuous process for preparing a polyisocyanate, in which a polyamine and phosgene are first converted predominantly to carbamoyl chloride and amine hydrochloride and only in minor proportions to polyisocyanate, and a portion of the carbamoyl chloride- and amine hydrochloride-containing reaction mixture thus obtained is recycled into the reaction with phosgene, wherein polyamine, phosgene and the carbamoyl chloride- and amine hydrochloride-containing reaction mixture are mixed intimately in a mixing unit. The portion of the carbamoyl chloride- and amine hydrochloride-containing reaction mixture which is not recycled into the phosgenation is worked up to give the polyisocyanate.. ... Covestro Deutschland Ag

06/28/18 / #20180179149

Method for preparing diisocyanates in the gas phase

The invention relates to a method for the preparation of diisocyanates by the reaction of the corresponding primary diamines with phosgene in the gas phase, wherein the pressure in the diamine evaporation chamber during the transfer of the diamine into the gas phase is less than the pressure in the reaction chamber during the reaction to the diisocyanates, and wherein the pressure difference between the diamine evaporation chamber and the reaction chamber prior to the mixing of diamine and phosgene is overcome by a pressure-increasing element.. . ... Covestro Deutschland Ag

06/21/18 / #20180171062

Rigid pur/pir foams of isopropylidenediphenol-based polyethers

The invention concerns a new polyol composition from isopropylidenediphenol-based polyethers, which are used in an advantageous manner for the production of polyurethane-polyisocyanurate (pur-/pir) rigid foams, as well as their production and use in pur/pir rigid foams.. . ... Covestro Deutschland Ag

06/14/18 / #20180162981

Process for producing polyisocvanurate plastics having functionalized surfaces

The invention relates to a process for producing polyisocyanurate plastics having a functionalized surface, comprising the following steps: a) providing a polyisocyanate composition a) containing monomeric and/or oligomeric polyisocyanates; b) catalytically trimerizing the polyisocyanate composition a) so as to obtain a bulk polyisocyanurate material as intermediate; c) surface functionalizing the intermediate by contacting at least one surface of the intermediate with at least one functionalizing reagent d); d) continuing the catalytic trimerization. The invention further relates to a polyisocyanurate plastic having a functionalized surface obtainable from the process of the invention.. ... Covestro Deutschland Ag

06/07/18 / #20180159022

Electromechanical converter consisting of a cyclically stable, reversible, and expandable electrode, and a method for producing same

The invention relates to thin, flexible and expandable electrically conductive electrode layers based on conductive carbon, said layers having a sufficiently high adhesion to dielectric layers in stacking actuators without delamination. The invention also relates to a method for producing said electrode layers, to the use thereof for producing electromechanical converters based on dielectric elastomers as well as components comprising the electromechanical converter, to a use of the electromechanical converter, and to a device for producing the electroactive polymer film system and the electromechanical converter from multilayer actuators.. ... Covestro Deutschland Ag

06/07/18 / #20180155574

Hydrophilic polyisocyanates based on 1,5-diisocyanatopentane

The invention relates to a polyisocyanate composition based on 1,5-diisocyanatopentane, to a method for the production thereof and to the use thereof for producing polyurethane plastics. The invention also relates to a coating agent containing the polyisocyanate composition and to the coating obtained from the coating agent.. ... Covestro Deutschland Ag

06/07/18 / #20180155516

Viscoelastic and reticulated polyurethane foam and the preparation thereof

The present invention provides a polyol composition for preparing a viscoelastic and reticulated polyurethane foam, comprising a first polyether polyol b1), a second polyether polyol b2), a third polyether polyol b3), and a surfactant b6). The present invention also provides a viscoelastic and reticulated polyurethane foam prepared from said polyol composition, wherein the polyurethane foam has a ball rebound rate of less than 15% determined according to gb/t6670-2008.. ... Covestro Deutschland Ag

05/24/18 / #20180142056

Solids based on polyisocvanurate polymers produced under adiabatic conditions

The invention relates to a process for producing solids made from polyisocyanurate plastics, comprising the following steps: (a) providing a polyisocyanate composition a) which contains oligomeric polyisocyanates and is low in monomeric polyisocyanates, where the isocyanurate structure content in the polyisocyanate composition a) is at least 50 mol %, based on the sum total of the oligomeric structures from the group consisting of uretdione, isocyanurate, allophanate, biuret, iminooxadiazinedione and oxadiazinetrione structure that are present in the polyisocyanate composition a); (b) catalytically trimerizing the polyisocyanate composition a), where (i) the catalytic trimerization is conducted at ambient temperatures of at least 80° c.; (ii) the catalytic trimerization is conducted within less than 2 hours at least up to a conversion level at which only at most 20% of the isocyanate groups originally present in the polyisocyanate composition a) are present; (iii) the catalytic trimerization takes place under quasi-adiabatic conditions which are characterized in that the material temperature at least one juncture is at least 10° c. Above ambient temperature. ... Covestro Deutschland Ag

05/17/18 / #20180134836

Polyurethane coverings having reduced water absorption and use thereof

The invention relates to coverings made of polyurethane having reduced water absorption and the use thereof.. . ... Covestro Deutschland Ag

05/17/18 / #20180134835

Polyisocyanurate polymer and process for the production of polyisocyanurate polymers

The present invention relates to novel polyisocyanurate plastics which are obtainable by catalytic trimerization of a polyisocyanate composition a) which contains oligomeric polyisocyanates and is low in monomeric diisocyanates. “low in monomeric diisocyanates” means that the polyisocyanate composition a) has a content of monomeric diisocyanates of at most 20% by weight. ... Covestro Deutschland Ag

05/17/18 / #20180133953

Process for producing an object from a precusor and use of a free-radically crosslinkable resin in an additive manufacturing process

A process for producing an object from a precursor comprises the steps of: depositing a free-radically crosslinked resin atop a carrier to obtain a ply of a construction material joined to the carrier which corresponds to a first selected cross section of the precursor; depositing a free-radically crosslinked resin atop a previously applied ply of the construction material to obtain a further ply of the construction material which corresponds to a further selected cross section of the precursor and which is joined to the previously applied ply; repeating step ii) until the precursor is formed; wherein the depositing of a free-radically crosslinked resin at least in step ii) is effected by exposure and/or irradiation of a selected region of a free-radically crosslinkable resin corresponding to the respectively selected cross section of the object and wherein the free-radically crosslinkable resin has a viscosity (23° c., din en iso 2884-1) of ≥5 mpas to ≤100000 mpas. In the process the free-radically crosslinkable resin comprises a curable component in which nco groups and olefinic c═c double bonds are present, wherein in the curable component the molar ratio of nco groups to olefinic c═c double bonds is in a range from ≥1:5 to ≤5:1.. ... Covestro Deutschland Ag

05/10/18 / #20180127536

Mixtures of polyether carbonate polyols and polyether polyols for producing polyurethane soft foams

The present invention relates to a process for producing flexible polyurethane foam materials, in particular hot-moulded foams, by reaction of an isocyanate component with a component reactive to isocyanates, wherein the constituents of the component reactive to isocyanates include a polyether polyol and a polyether carbonate polyol. The invention further relates to flexible polyurethane foams produced by the process according to the invention.. ... Covestro Deutschland Ag

05/03/18 / #20180118971

Aqueous polyurethane-polyacrylate dispersions

The present invention relates to an aqueous polyurethane-polyacrylate dispersion, obtainable by radical polymerization of a component a), comprising an ethylenically unsaturated compound, at least in the presence of a component b), comprising water and a polyurethane resin, obtainable by reaction of the following synthesis components i), comprising at least one aliphatic, cycloaliphatic, araliphatic and/or aromatic compound having at least two or more isocyanate groups, ii), comprising at least one polycarbonate polyol having an average molecular weight of 500 to 3000 g/mol, iii), comprising at least one anionically hydrophilizing compound which has at least one oh- or nh-functional group and comprising a carboxyl and/or carboxylate group, iv), comprising at least one polyol and/or polyamine having an average molecular weight of between ≥62 and ≤500 g/mol, and optionally v), comprising at least one or more monoalcohols and/or monoamines, the radical polymerization being initiated using a hydrophilic initiator.. . ... Covestro Deutschland Ag

05/03/18 / #20180118931

Aqueous dispersion mixture

The present invention provides an aqueous dispersion mixture comprising; an aqueous dispersion (a) that comprises a crystalline polyolefin (a) as a dispersoid thereof; an aqueous dispersion (b) that comprises a crystalline polyurethane (b) as a dispersoid thereof; and an aqueous dispersion (c) that comprises a non-crystalline polyurethane (c) as a dispersoid thereof, wherein the crystalline polyolefin (a) is a non-chlorine modified polyolefin, wherein the crystalline polyurethane (b) has a crystal melting heat amount equal to or larger than 3 j/g measured by differential scanning calorimetry, wherein the non-crystalline polyurethane (c) has a crystal melting heat amount smaller than 3 j/g measured by differential scanning calorimetry, and wherein the aqueous dispersion (b) comprises a non-volatile content of 30 parts by mass to 100 parts by mass and the aqueous dispersion (c) comprises a non-volatile content of 20 parts by mass to 80 parts by mass, relative to a non-volatile content of 100 parts by mass of the aqueous dispersion (a).. . ... Covestro Deutschland Ag

04/19/18 / #20180105722

Method for adhesively bonding substrates using adhesives

The present invention relates to a method for adhesively bonding substrates, said method comprising the following steps: i) at least one adhesive component (a) and at least one isocyanate component (b) are applied between at least two substrates; ii) the substrates are pressed together. The method is characterized in that in step i), the adhesive component and the isocyanate component are applied separately to the substrate. ... Covestro Deutschland Ag

04/19/18 / #20180105644

Ultra-high purity polycarbonates having good inherent color and thermal resistance and a device and a method for producing the same

The invention relates to polycarbonates with extremely low residual levels of volatile constituents and thermal degradation products, and also improved optical properties, especially yellowness index (yi) and good thermal stability, from solvent-containing polymer melts. The invention further relates to an apparatus and a process for preparing these polycarbonates with the aid of a devolatilizing extruder with at least three devolatilizing zones, and zones for introducing entraining agent into dispersion are present upstream of at least three devolatilizing zones.. ... Covestro Deutschland Ag

04/19/18 / #20180105643

Polycarbonate composition having improved optical and thermal properties

The invention relates to aromatic polycarbonates which comprise dioxydiarylcycloalkane structural units, and which have improved optical and thermal properties. It also relates to an improved process to produce the said polycarbonates from dihydroxydiphenylcycloalkanes, and also to mixtures of these polycarbonates with polymers, with fillers, with dyes and with conventional additives.. ... Covestro Deutschland Ag

04/19/18 / #20180105634

Polyol premix composition for rigid polyurethane foams

The present invention relates to a polyol premix composition for rigid polyurethane foams comprising a hydrohaloolefin as foaming agent, an amine catalyst and an aliphatic dicarboxylic acid. The polyol premix composition has a high initial reaction rate when it is reacted with isocyanate and shows smaller deterioration of reactivity over time.. ... Covestro Deutschland Ag

04/19/18 / #20180104922

Method for producing 3d objects

The invention relates to a method for producing a three-dimensional object, the outer surface of which has at least one surface section that is generated in that, by means of an additive production method (layer-building forming method), initially a surface section is produced on a flat base plate (5) in two-dimensional form, comprising the following steps: i) applying at least one curable polymer or curable reaction resin with a respective elastic modulus according to din 53504 (effective: 18 apr. 2015) in the cured state, of <250 mpa in fluid form, as material webs onto a flat base plate (5) by means of a layer-building forming method in order to produce a first layer (6); ii) applying a second layer (7) onto the first layer (6) by means of the same or another layer-building forming method, like in step i); iii) optionally applying between 1 and 48 additional layers according to step ii), wherein each new layer is applied onto the respective previous layer; iv) curing the layers; v) releasing the cured surface section from the flat base plate (5); vi) forming the cured surface section into a three-dimensional object; and vii) securing the three-dimensional object.. ... Covestro Deutschland Ag

03/29/18 / #20180086875

Polyisocyanurate plastics having high thermal stability

The present invention relates to a polyisocyanurate plastic obtainable by catalytic trimenzation of a polyisocyanate composition a) which contains oligomeric polyisocyanates and is low in monomeric diisocyanates, where the isocyanurate structure content in the polyisocyanate composition a) is at least 50 mol %, based on the sum total of the oligomeric structures from the group consisting of uretdione, isocyanurate, allophanate, biuret, iminooxadiazinedione and oxadiazinetrione structure that are present in the polyisocyanate composition a). The present invention further relates to a transparent element comprising or consisting of the polyisocyanurate plastic. ... Covestro Deutschland Ag

03/22/18 / #20180079890

Method for producing polyether carbonate polyols

The invention relates to a method for producing polyether carbonate polyols, (i) one or more alkylene oxide(s) and carbon dioxide being added to one or more h-functional starter substance(s) in the presence of a double metal cyanide catalyst or in the presence of a metal complex catalyst based on the metals zinc and/or cobalt, a reaction mixture containing the polyether carbonate polyol being obtained, characterized in that (ii) at least one component k is added to the obtained reaction mixture containing the polyether carbonate polyol, wherein component k is selected from at least one compound that contains a phosphorus-oxygen bond or a compound of phosphorus that can form one or more p—o bonds by reaction with oh-functional compounds.. . ... Covestro Deutschland Ag

03/22/18 / #20180079862

Block co-condensates of polysiloxanes and dihydroxydiphenylcycloalkane-based n (co)polycarbonates

The present invention relates to block cocondensates of polysiloxanes and dihydroxydiarylcycloalkane-based (co)polycarbonates and also to a process for preparing such block cocondensates. The invention further relates to the use of these block cocondensates for producing mouldings and extrudates.. ... Covestro Deutschland Ag

03/22/18 / #20180079855

Process for producing polyisocyanurate plastics

The invention relates to a process for producing polyisocyanurate plastics, comprising the following steps: (a) providing a polyisocyanate composition a) which contains oligomeric polyisocyanates and is low in monomeric diisocyanates, where the isocyanurate structure content in the polyisocyanate composition a) is at least 50 mol %, based on the sum total of the oligomeric structures from the group consisting of uretdione, isocyanurate, allophanate, biuret, iminooxadiazinedione and oxadiazinetrione structure that are present in the polyisocyanate composition a); (b) catalytically trimerizing the polyisocyanate composition a), where (i) the catalytic trimerization is conducted at ambient temperatures of at least 80° c.; (ii) the catalytic trimerization is conducted within less than 12 hours at least up to a degree of conversion at which only still not more than 20% of the isocyanate groups originally present in the polyisocyanate composition a) are present. Furthermore, the invention relates to a polyisocyanurate plastic obtainable by the process of the invention, to its use for producing coatings, films, semi-finished products and moldings.. ... Covestro Deutschland Ag

03/22/18 / #20180079852

Polyisocyanate composition based on 1,5-pentamethylene diisocyanate

The invention relates to a polyisocyanate composition, containing compounds having isocyanate groups with at least one 1,5-bridging pentamethylene unit and an isocyanate group, wherein a portion of the compounds additionally has at least one allophanate group, characterized in that the polyisocyanate composition has an isocyanurate trimer content of ≦59 wt. % in relation to the total weight of the polyisocyanate composition, the allophanate groups carry a group that is organic and inert relative to isocyanate groups, and the allophanate groups are present in an equivalent ratio of >0 and ≦0.19 in relation to the isocyanurate groups. ... Covestro Deutschland Ag

03/15/18 / #20180072846

Polymer polyol quality

This invention relates to a process for preparing a stable low viscosity polymer polyol having a solids content of at least about 30% by weight. This process is particularly suitable for restarting the process of production after any reactor shutdown (planned or unplanned).. ... Covestro Deutschland Ag

03/15/18 / #20180072005

Method for manufacturing fiber-reinforced plastic products

The present application relates to a method for manufacturing fiber-reinforced plastic products. This method comprises: preparing a fiber preform on a mold; disposing first and second flow meshes and first and second demolding cloths; sealing the fiber preform to form a vacuum system by pumping; penetrating the resin through the first peel ply via the first flow mesh and impregnates the fiber preform from bottom to top; penetrating the resin through the second peel ply via the second flow mesh and impregnates the fiber preform from top to bottom; and attaining a resin-impregnated fiber perform and finally attaining fiber-reinforced plastic products.. ... Covestro Deutschland Ag

03/15/18 / #20180071979

Use of an elastic polymer for production of a porous body in an additive manufacturing method

It is a feature of a use of an elastic polymer for production of a porous body (in an additive manufacturing method that the porous body comprises a three-dimensional network of node points joined to one another by struts, and a void volume present between the struts, where the struts have an average length of ≧200 μm to ≦50 mm and the struts (100) have an average thickness of ≧100 μm to ≦5 mm. The polymer here is an elastomer selected from the following group: thermoset polyurethane elastomers (pur), thermoplastic copolyamides (tpa), thermoplastic copolyesters (tpc), thermoplastic olefin-based elastomers (tpo), styrene block copolymers (tps), thermoplastic urethane-based elastomers (tpu), crosslinked thermoplastic olefin-based elastomers (tpv), thermoplastic polyvinyl chloride-based elastomers (pvc), thermoplastic silicone-based elastomers and a combination of at least two of these elastomers.. ... Covestro Deutschland Ag

03/15/18 / #20180070736

Porous body, additive manufacturing method for the body and apparatus for supporting and/or bearing a person

It is a feature of a porous body comprising a three-dimensional network of node points joined to one another by struts, and a void volume present between the struts, that the struts have an average length of ≧200 μm to ≦50 mm, the struts have an average thickness of ≧100 μm to ≦5 mm, and that the porous body has a compression hardness (40% compression, din en iso 3386-1: 2010-09) in at least one spatial direction of ≧10 to ≦100 kpa. The porous body according to the invention combines the advantages of a conventional mattress or cushion with ventilatability which results from its porous structure and is not achievable in conventional foams. ... Covestro Deutschland Ag

03/08/18 / #20180066100

Isocyanate-based temperature-resistant foams with high flame resistance

The invention relates to temperature-resistant foams with a high degree of flame resistance, to the production of same from aromatic isocyanates and polyepoxides using incorporable catalysts and with formic acid as a blowing agent, and to the use of said foams.. . ... Covestro Deutschland Ag

02/22/18 / #20180050526

Use of layer structures in wind power plants

The invention relates to the use of layer structures in the production of rotor blades for wind power plants, and to rotor blades for wind power plants.. . ... Covestro Deutschland Ag

02/15/18 / #20180044464

Viscoelastic flexible polyurethane foams based on polyether carbonate polyols

The present invention relates to a method for the production of viscoelastic polyurethane foams by reacting an isocyanate component with a component which is reactive towards isocyanates, comprising ≧50 to ≦100 weight parts of at least one polyether carbonate polyol with a hydroxyl number according to din 53240 of ≧150 mg koh/g to ≦300 mg koh/g. The invention also relates to polyurethane foams produced by the method of the invention and their use.. ... Covestro Deutschland Ag

02/08/18 / #20180037697

Process for preparing polycarbonates by transesterifying dithiocarbonates or selenium analogues thereof with bisphenols

The present invention relates to a process for preparing aromatic polycarbonates, comprising the step of reacting bisphenols with dithiocarbonates or selenium analogues thereof in the presence of a catalyst. It further relates to the use of dithiocarbonates or selenium analogues thereof as transesterifying reagents for the preparation of polycarbonates.. ... Covestro Deutschland Ag

01/25/18 / #20180022871

Process for the synthesis of polyoxazolidinone compounds with high stability

The present invention relates to polyoxazolidinone compounds, a method for the production of polyoxazolidinone compounds, comprising the step of reacting a biscarbamate compound with a bisepoxide compound in the presence of a mono-carbamate, a mono-isocyanate and/or a mono-epoxide compound as chain regulator and a suitable base having a pkb value of ≦9 as catalyst. The invention further relates to the use of polyoxazolidinone compounds with high thermal stability.. ... Covestro Deutschland Ag

01/11/18 / #20180009986

Flame-retardant molding compounds containing siloxane-containing polycarbonate block co-condensate

The present invention relates to flame-retardant moulding compositions comprising siloxane-containing polycarbonate block cocondensate, and also to a process for the production of these moulding compositions. The invention further relates to the use of these flame-retardant moulding compositions in injection-moulding and extrusion applications.. ... Covestro Deutschland Ag

01/11/18 / #20180009941

Process for preparing polyether carbonate polyols

The invention provides a process for preparing polyether carbonate polyols by addition of alkylene oxides and carbon dioxide onto h-functional starter substance in the presence of a double metal cyanide (dmc) catalyst or in the presence of a metal complex catalyst based on the metals zinc and/or cobalt, wherein (γ) alkylene oxide and carbon dioxide are added onto h-functional starter substance in a reactor in the presence of a double metal cyanide catalyst or in the presence of a metal complex catalyst based on the metals zinc and/or cobalt, wherein a reaction mixture comprising the polyether carbonate polyol is obtained, and wherein (δ) the reaction mixture obtained in step (γ) remains in the reactor or is transferred continuously into a postreactor, wherein the content of free alkylene oxide in the reaction mixture is reduced in each case in the manner of a postreaction, characterized in that a component k is added during the postreaction, component k being selected from at least one compound containing a phosphorus-oxygen-hydrogen group.. . ... Covestro Deutschland Ag

01/11/18 / #20180009931

Composition for transparent shaped bodies based on polyurethane

A composition comprising an isocyanate component a) comprising at least one cycloaliphatic or araliphatic diisocyanate, a polyol component b) comprising at least one polyol having an oh number of 80 to 1000 mg koh/g, an additive component c) comprising at least one internal demoulding agent, and a catalyst component d) comprising at least one inorganic metal complex as thermally latent catalyst, characterized in that the thermally latent catalyst has a quotient of reaction rates between catalysed reaction and uncatalysed reaction at 30° c. Of =5.0 and at 60° c. ... Covestro Deutschland Ag

01/11/18 / #20180009929

Method for producing a composition comprising polycarbodiimide having improved storage stability

A method for producing a composition comprising polycarbodiimide, comprising the step of the reaction of a reaction mixture which contains an aromatic polyisocyanate and a carbodiimidising catalyst, wherein, before the reaction, the aromatic polyisocyanate is treated at a temperature of ≧80° c. To ≦150° c. ... Covestro Deutschland Ag

01/04/18 / #20180002479

Crystallization stable polyester prepolymers

. . The invention relates to a crystallization stable polyester prepolymers for producing hdi- and pdi-based, solvent free two component (2k)-polyurethane- and/or polyurea coating agents.. . ... Covestro Deutschland Ag

01/04/18 / #20180001310

Catalysts for producing isocyanurates from isocyanates

The invention relates to a method for producing isocyanurates and isocyanurate-containing polyurethanes, comprising the step of reacting an isocyanate in the presence of a catalyst.. . ... Covestro Deutschland Ag

12/28/17 / #20170369707

Flame-retardant, glass fiber-containing molding compounds containing siloxane-containing polycarbonate block co-condensate

. . The present invention relates to flame-retardant moulding compositions comprising glass fibre and siloxane-containing polycarbonate block cocondensate, and also to a process for the production of these moulding compositions. The invention further relates to the use of these flame-retardant moulding compositions in injection-moulding and extrusion applications.. ... Covestro Deutschland Ag

12/28/17 / #20170369642

Preparation of highly heat-resistant (co)polycarbonates by the transesterification method

The present invention relates to a melt transesterification process for the production of (co)polycarbonates from diaryl carbonates and cycloalkylidene diphenols, which process comprises the addition of a monohydroxyaryl compound in an amount of 5.0 to 20.0 wt.-%, based on the total mass of the reaction mixture. The invention further relates to a (co)polycarbonate obtained by the process.. ... Covestro Deutschland Ag

12/21/17 / #20170363957

Naphthyl acrylates as writing monomers for photopolymers

The invention relates to naphthyl urethane acrylates particularly useful as writing monomers in photopolymer formulations for holographic media. The invention further relates to a photopolymer formulation comprising matrix polymers, writing monomers and photoinitiators, wherein the writing monomers comprise a naphthyl urethane acrylate according to the invention, to a holographic medium comprising matrix polymers, writing monomers and photoinitiators, wherein the writing monomers comprise a naphthyl urethane acrylate according to the invention, and also to a display comprising a holographic medium according to the invention.. ... Covestro Deutschland Ag

12/21/17 / #20170362431

Copolycarbonate compositions with improved rheological and optical properties containing diglycerolesters

The invention relates to copolycarbonate compositions containing diglycerolesters, which have improved rheological as well as optical properties, to their use for producing blends, mouldings and to moldings obtained therewith.. . ... Covestro Deutschland Ag

12/21/17 / #20170362430

Filled polycarbonate compositions having improved flowability and great rigidity

The present invention relates to glass fibre, carbon fibre and/or carbon nanotube reinforced polycarbonate compositions comprising flame retardant, diglycerol monoester and optionally antidripping agent and having high flowability, excellent stiffness and possibly improved flame retardant properties. The present invention further relates to the use of the compositions according to the invention in particular in the manufacture of housing parts in the ee and it sector, for example for electrical housings/junction boxes or for frames of lcd/led screens and also for component parts for the manufacture of ultrabooks.. ... Covestro Deutschland Ag

12/21/17 / #20170362410

Flowability of polycarbonate compositions

The present invention relates to the use of diglycerol esters for enhancing the flowability of transparent polycarbonate compositions. Melt viscosities and melt volume flow rates are improved. ... Covestro Deutschland Ag

12/21/17 / #20170362349

Photopolymer comprising a new class of photo initator

The present invention relates to photopolymer comprising a photopolymerizable component and a photo initiator system. Further aspects of the present invention are a holographic media which comprises such a photopolymer, a display which comprises such a holographic media and the use of such a holographic media to make chip cards, security documents, bank notes and/or holographic optical elements especially for displays.. ... Covestro Deutschland Ag

12/21/17 / #20170362165

Moisture-stable holographic media

The invention relates to novel compounds which are especially suitable for use as writing monomers in holographic media. The invention further provides a photopolymer and a holographic medium comprising the inventive compounds, and an optical display, a security document and a holographic optical element comprising an inventive holographic medium.. ... Covestro Deutschland Ag

12/14/17 / #20170355850

Pc/abs compositions that are stable to processing

The present invention relates to moulding compositions comprising polycarbonate and acrylonitrile-butadiene-styrene polymer (abs) as well as optionally further additives and components, which moulding compositions are distinguished by high thermal processing stability in respect of gloss level, polycarbonate degradation and content of free bisphenol a and exhibit improved stress cracking resistance.. . ... Covestro Deutschland Ag

12/14/17 / #20170355817

Copolycarbonate compositions with improved processing behaviour containing pe-wax

The invention relates to copolycarbonate compositions containing oxidized, acid-modified polyethylene wax, to their use for producing blends and moldings and to moldings obtained therewith. Said copolycarbonate compositions have an improved processing behaviour.. ... Covestro Deutschland Ag

12/14/17 / #20170355816

Polycarbonate compositions containing polyethylene wax

The invention relates to polycarbonate compositions with an improved thermal behaviour and improved slip characteristics, achieved by the use of oxidised, acid-modified polyethylene waxes.. . ... Covestro Deutschland Ag

11/16/17 / #20170327620

Method for producing viscoelastic polyurethane foams

The present invention relates to a method for producing a viscoelastic polyurethane soft foam. The invention further relates to a viscoelastic polyurethane soft block foam or viscoelastic polyurethane soft molded foam having particularly high tensile strengths, which are produced by the method according to the invention, and to the use of said foams. ... Covestro Deutschland Ag

11/16/17 / #20170327033

Lighting device for vehicles

A lighting device for vehicles, in particular a signal light, with a light source for emitting a light beam and an optical unit associated with the light source for producing a predetermined light function, the optical unit having a holographic element and a lens arranged in the main emission direction in front of the holographic element, the holographic element comprising such a diffraction structure that the light beam emitted from the light source onto the holographic element is varied according to a predetermined illumination pattern such that the holographic light beam lights an illumination surface of the lens to generate the light function.. . ... Covestro Deutschland Ag

11/09/17 / #20170322566

Method for continuously producing a product by way of at least two coupled-together chemical reactions

A method for continuously producing a product (a1) by way of at least two coupled-together chemical reactions (c1, c2), wherein at least two input substances (e1, e2) are fed to a first chemical reaction (c1), wherein a plurality of intermediate substances (z1, z2) are produced from the input substances (e1, e2) by the first chemical reaction (c1), wherein at least one of the intermediate substances (z2) is fed to a second chemical reaction (c2), wherein the at least one fed intermediate substance (z2) is further processed by the second chemical reaction (c2), in particular using at least one further substance (w1, w2) in a second chemical reaction (c2) to form a plurality of output substances (a1, a2), that is to say to form the chemical product (a1) and at least one further output substance (a2), wherein the flow rates (fi) of the fed substances (e1, e2, z1, w1, w2, a2) that are fed to one of the reactions (c1, c2) are set by a respective actuating element (ve1, ve2, vw1, vw 2, vz 2, va1), wherein each of the fed substances is assigned a separate actuating element, wherein a manipulated variable (se2,r, si,r) that is stipulated by a controller (re2, ri) is respectively applied to at least one of the actuating elements, wherein, for changing the production rate of the chemical product (a1), a temporary manipulated variable (se2,temp, si,temp) is respectively applied during a transient phase (ii, iii) to at least one of these actuating elements (ve2, vi) instead of the manipulated variables (se2,r, si,r) stipulated by the respective controllers (re2, ri), wherein the temporary manipulated variable (se2,temp, si,temp) or the temporary manipulated variables is/are generated by at least one control unit (se) in dependence on a default value (nv).. . ... Covestro Deutschland Ag

11/09/17 / #20170321005

Method for producing polyether carbonate polyols

The invention relates to a method for producing polyether carbonate polyols, comprising the step of reacting alkylene oxide with carbon dioxide in the presence of an h-functional starter compound and double metal cyanide catalyst. The invention is characterized in that the method comprises the following steps: (α) optionally, pre-treating the double metal cyanide catalyst (dmc catalyst) at a temperature of 50 to 200° c. ... Covestro Deutschland Ag

10/26/17 / #20170306122

Method for producing flame retardant polyurethane foams using halogen-free flame retardants

The present invention relates to a process for producing flame-retarded polyurethane foams, in particular flexible polyurethane foams, using halogen-free flame retardants, wherein the resulting flame-retarded polyurethane foams exhibit low emission values coupled with good mechanical properties. The present invention further relates to halogen-free flame retardants.. ... Covestro Deutschland Ag

10/26/17 / #20170306116

Lightfast polyurethane prepregs and fiber composite elements produced therefrom

The present invention relates to storage-stable prepregs (preimpregnated fibers) on the basis of lightfast, low-viscous polyurethane systems with an increased characteristic number and flat fiber composite components (molded bodies; composite compounds) produced therefrom, which can be obtained by methods of impregnation of, for example, woven fabrics and laid scrims, and to a method for the production thereof.. . ... Covestro Deutschland Ag

10/26/17 / #20170305842

Method for producing isocyanates in the gas phase

The invention relates to a method for producing isocyanates by reacting the corresponding primary amines with phosgene in the gas phase, wherein the phosgene is injected into the gaseous amine flow in the interior of the flow tube via an outer ring channel and through several radial channels in an angle of ≦90° relative to the flow direction of the gaseous amine flow, wherein a static mixer of the kenics type is provided coaxially in the interior of the flow tube.. . ... Covestro Deutschland Ag

10/12/17 / #20170291869

Exhaust gas cleaning in a method for continuously producing dinitrotoluene

The invention relates to a method for producing dinitrotoluene, comprising the following steps: a) nitrating toluene with a mixture of nitric acid and sulfuric acid and subsequently separating a sulfuric-acid-containing aqueous phase that arises in the nitration, wherein a raw dinitrotoluene is obtained, b) washing the raw dinitrotoluene in a water wash with neutral and/or alkaline washing water, wherein a pre-cleaned dinitrotoluene, which contains at least water in addition to dinitrotoluene, is obtained after the washing water used in the last wash has been separated, and c) separating the water from the pre-cleaned dinitrotoluene, d) collecting the waste water from steps a), b), and/or c), e) optionally extracting the collected waste water from step d) with toluene and returning the thus obtained organic phase to step a), f) freeing the collected waste water from step d), or, if the optional step e) is performed, the extracted waste water from step e), of toluene in a toluene stripper, wherein a toluene-containing exhaust gas flow is obtained, g) feeding at least one exhaust gas flow from steps a), b), c), d), e), or f) into an exhaust gas condenser and removing the toluene contained in the at least one exhaust gas flow in said exhaust gas condenser, wherein the method comprises the following further step: h) feeding the exhaust gas flow arising in step g) after the condensing out of the toluene to a thermal exhaust air cleaning, wherein nitrogen is added to the exhaust gas flow to be fed to the exhaust gas condenser or to the exhaust gas flow leaving the exhaust gas condenser, wherein preferably a nitrogen concentration in the exhaust gas flow of at least 0.1 vol % is set, especially preferably of at least 0.5 vol %.. . ... Covestro Deutschland Ag

10/12/17 / #20170291400

Trim for motor vehicle glazing systems

The invention relates to trims for motor vehicle glazing systems, comprising a base layer and a coating and having glass-like optical properties at least in some subsections, composites consisting of such trims for motor vehicle glazing systems, and car body parts, as well as preferred embodiments which comprise suitable combinations of materials. Said trims comprising, at least towards the front side thereof, an edge rounding having a variable radius which allows a more uniform layer thickness for the coating.. ... Covestro Deutschland Ag

10/05/17 / #20170283964

Oxygen-consuming electrode which contains carbon nanotubes and method for producing same

The invention relates to an oxygen-consuming electrode, in particular for use in chloralkali electrolysis, comprising a catalyst coating based on carbon nanotubes, and to an electrolysis device. The invention further relates to a method for producing said oxygen-consuming electrode and to the use thereof in chloralkali electrolysis or fuel cell technology.. ... Covestro Deutschland Ag

10/05/17 / #20170283650

Colorless, transparent and heat resistant polyurethane films and methods for manufacturing the same

The present inventions concerns compositions for producing thermoset polyurethanes, comprising polyisocyanates and polyols selected from a list consisting of allieyclic, aromatic compounds and branched polyesters. The films obtained from these compositions exhibit a high transparency, high thermal stability and good chemical resistance, and a method to produce the same. ... Covestro Deutschland Ag

10/05/17 / #20170283370

Method for producing 1,5-pentanediisocyanate in the gas phase

The invention relates to a method for producing 1,5-pentanediisocyanate (pdi) by reacting 1,5-pentanediamine (pda) with phosgene in the gas phase.. . ... Covestro Deutschland Ag

09/21/17 / #20170266936

Method for producing a polycarbonate layered composite

The invention relates to a method for making a structure with at least a first polymer layer and a second polymer layer, each made from a polycarbonate polymer based on bisphenol a, and in between the first polymer layer and the second polymer layer an intermediate layer being arranged, comprising the following steps: a) the intermediate layer is applied at least on a partial region of the first polymer layer, b) optionally the intermediate layer is dried, c) the first polymer layer is coated on the side, on which the intermediate layer is arranged, with a liquid preparation comprising a solvent or a mixture of solvents and a polycarbonate derivative based on a geminally disubstituted dihydroxydiphenyl cycloalkane, the preparation covering the intermediate layer, d) optionally a drying step is made after step c), e) after step c) or step d), the second polymer layer is placed on the first polymer layer, covering the intermediate layer, f) the first polymer layer and the second polymer layer are laminated with each other under pressure, at a temperature from 120° c. To 230° c. ... Covestro Deutschland Ag

09/21/17 / #20170266854

Polymer material filled composite element and a process for preparing the same

The present invention provides a process for preparing a polymer material filled composite element, comprising the steps of: i) providing a partially closed space, wherein a polyurethane foam is disposed at least at part of the periphery of the space to restrain the flow of the polymer material resin, and the polyurethane foam is formed by in situ application of a polyurethane composition and has an air flow value of greater than 1 l/min as determined by astm d3574 test; ii) applying the polymer material resin into the space and curing the polymer material resin to form a polymer material that fills the space.. . ... Covestro Deutschland Ag

09/07/17 / #20170252948

Screw elements with improved dispersing action and low energy input

The present invention relates to new screw elements for multi-screw extruders with pairs of co-rotating and fully wiping screws.. . ... Covestro Deutschland Ag

08/24/17 / #20170239589

Divided wall columns

Disclosed is a divided wall column, comprising: a column shell; a divided wall provided vertically inside the column shell, defining a divided wall section between an upper edge and a lower edge of the divided wall; and a liquid distributor provided within the divided wall section, characterized in that, the liquid distributor is fixed only to the column shell but not to the divided wall. By using the divided wall column of the present invention, a defect involved in conventional divided wall columns, i.e. ... Covestro Deutschland Ag

08/17/17 / #20170233880

Method for electrochemical oxygen reduction in alkaline media

The invention relates to a method for electrochemical reduction of oxygen in alkaline media, a catalyst comprising nitrogen-doped carbon nanotubes (ncnts) having nanoparticles located on their surface being used.. . ... Covestro Deutschland Ag

08/17/17 / #20170233571

Copolycarbonate compositions with branch structures and cyclic oligomers and improved rheological properties

The invention relates to copolycarbonate compositions having branch structures and cyclic oligomers and improved flow properties, to their use for producing blends and moldings and to moldings obtained therewith.. . ... Covestro Deutschland Ag

08/17/17 / #20170233526

Process for the preparation of polyethercarbonate polyols

A process for the preparation of polyethercarbonate polyols comprises the reaction of a reaction mixture comprising one or more h-functional starter compounds, one or more alkylene oxides, carbon dioxide and a double metal cyanide (dmc) catalyst. The reaction is conducted in a reactor under stirring with a specific power input into the reaction mixture, expressed as watts per liter (w/l), of ≧0.07 to ≦5.00.. ... Covestro Deutschland Ag

08/10/17 / #20170227294

Apparatus and method for evaporating liquids containing potentially explosive impurities

The present invention relates to an apparatus and a method for evaporating liquids containing potentially explosive impurities of lower volatility than the actual liquid compound. The set-up of the evaporator according to the invention allows its operation with complete evaporation of a liquid without formation of a liquid sump of not yet evaporated liquid.. ... Covestro Deutschland Ag

08/10/17 / #20170226376

Polyurethane urea solutions for textile coatings

The invention relates to a method for coating textiles and/or leather, comprising applying at least one polyurethane urea dissolved in a solvent or solvent mixture, wherein the solvent consists of one or more monohydroxy-functional alcohols, or a solvent mixture consisting of organic solvents, containing >80 wt. % of at least one monohydroxy-functional alcohol in relation to the total mass of the solvent mixture is used, and wherein the polyurethane urea is formed by: a) at least one araliphatic, aliphatic and/or cycloaliphatic diisocyanate; b) at least one polyether polyol having a number average molecular weight mn≧400 and ≦6000 g/mol and an average hydroxyl functionality of ≧1.5 and ≦4; c) at least one amino-functional compound having at least two isocyanate reactive amino groups; and optionally other components. ... Covestro Deutschland Ag

08/10/17 / #20170226340

Copolycarbonate compositions with branch structures and linear oligomers and improved rheological properties

The invention relates to copolycarbonate compositions having branch structures and linear oligomers and improved flow properties, to their use for producing blends and moldings and to moldings obtained therewith.. . ... Covestro Deutschland Ag

08/10/17 / #20170224606

Polyurethane urea solutions for hair-styling compositions

The invention relates to a hair-styling composition, comprising at least one propellant gas and/or a thickener, and a polyurethane urea, which has no ionic hydrophilizing groups and which is dissolved in a solvent or solvent mixture, the solvent consisting of one or more monohydroxy-functional alcohols or a solvent mixture consisting of organic solvents, which solvent mixture contains ≧50 wt. % of at least one monohydroxy-functional alcohol, with respect to the total mass of the solvent mixture. ... Covestro Deutschland Ag

08/03/17 / #20170218197

Copolycarbonate compositions with cyclic and linear oligomers and improved rheological properties

The invention relates to copolycarbonate compositions having cyclic and linear oligomers and improved flow properties, to their use for producing blends and moldings and to moldings obtained therewith.. . ... Covestro Deutschland Ag

08/03/17 / #20170216190

Polyurethane urea solutions for nail varnish compositions

The present invention relates to a process for producing a nail varnish composition, characterized in that at least one polyurethane urea which has no ionically hydrophilizing groups and has been dissolved in a solvent or solvent mixture is used, the solvent comprising one or more monohydroxy-functional alcohols or being a solvent mixture comprising organic solvents and containing ≧50% by weight, based on the total mass of the solvent mixture, of at least one monohydroxy-functional alcohol. The present invention further relates to a nail varnish composition obtainable by the process according to the invention and to a process for producing a cosmetic coating on nails using the nail varnish compositions according to the invention.. ... Covestro Deutschland Ag

08/03/17 / #20170216189

Polyurethane urea solutions for cosmetic compositions

The invention relates to a method for producing a cosmetic composition, comprising at least one polyurethane urea which does not contain any ionically hydrophilizing groups and is dissolved in a solvent or solvent mixture, wherein the solvent consists of one or more monohydroxy-functional alcohol(s), or a solvent mixture that consists of organic solvents and contains ≧50 wt. %, relative to the total weight of the solvent mixture, of at least one monohydroxy-functional alcohol. ... Covestro Deutschland Ag

07/27/17 / #20170212420

Layer structure comprising a photopolymer layer and a substrate layer

The invention relates to layered setup comprising a substrate layer and a photopolymer layer bonded thereto at least segmentally, wherein the substrate layer has an average retardation of ≦60 nm.. . ... Covestro Deutschland Ag

07/27/17 / #20170210702

Method for producing xylylene diisocyanates in the gaseous phase

The invention relates to a method for producing the isomers 1,3- and/or 1,4-xylylene diisocyanates by reacting the corresponding 1,3- and/or 1,4-xylylene diamines with phosgene in the gaseous phase.. . ... Covestro Deutschland Ag

07/27/17 / #20170210030

Mixing elements having an improved dispersing effect

The invention relates to mixing elements having an increased number of base geometry periods per longitudinal section and an improved dispersing effect for multi-shaft screw extruders comprising screw shafts that co-rotate in pairs. The mixing elements have clearances that are configured according to the method of spatial equidistants or according to the method of longitudinal equidistants. ... Covestro Deutschland Ag

07/20/17 / #20170204218

Water-vapour permeable composite parts

The invention relates to water-vapour permeable, flat composite parts consisting of at least two layers, at least one layer being made of a particular wax-containing thermoplastic polyurethane. The invention also relates to the use thereof.. ... Covestro Deutschland Ag

07/13/17 / #20170199494

Selection method for additives in photopolymers

The invention relates to a method for selecting compounds which can be used as additives in photopolymer formulations for producing light holographic media, and to photopolymer formulations which contain at least one softener which are selected according to the claimed method. The invention also relates to the use of photopolymer formulations for producing holographic media.. ... Covestro Deutschland Ag

07/13/17 / #20170198092

Method for the production of polyether carbonate polyols and device therefor

The present invention relates to a method for producing polyether carbonate polyols by addition of one or more alkylene oxides and carbon dioxide to one or more h-functional starter substances in the presence of at least one dmc catalyst, in which the reaction is conducted in a main reactor (8) and a tubular reactor (11, 17) connected as a post reactor downstream thereof, wherein the method is characterized in that at the outlet (13) of the tubular reactor (11, 17) a temperature is set that is at least 10° c. Above the temperature in the inside of the main reactor (8). ... Covestro Deutschland Ag

07/06/17 / #20170192150

Viewing angle switchable back light unit

The disclosure relates to a viewing angle switchable back light unit wherein a general mode and a privacy mode in a liquid crystal display can be selected. A thin film type back light unit includes a light guide film, a light radiator, a first light source, and a light collimator. ... Covestro Deutschland Ag

06/29/17 / #20170182754

Water-vapour permeable composite parts

The invention relates to water-vapour permeable, flat composite parts consisting of at least two layers, at least one layer being made of a polyether-based thermoplastic polyurethane. The invention also relates to the use thereof.. ... Covestro Deutschland Ag

06/22/17 / #20170174612

Process for producing nitrobenzene

The present invention relates to a process for the continuous production of nitrobenzene by the nitration of benzene with nitric acid and sulphuric acid under adiabatic conditions, not the entire production plant being shut down during a production stop, but the production plant being entirely or at least partly operated in recirculation mode. The invention further relates to a plant for producing nitrobenzene and to a method for operating a plant for producing nitrobenzene.. ... Covestro Deutschland Ag

06/15/17 / #20170166719

Shaped parts made of reinforced polyurethane urea elastomers and use thereof

The invention relates to foamed shaped parts provided with reinforcing materials and made from polyurethane urea elastomers, and to the use thereof.. . ... Covestro Deutschland Ag

06/15/17 / #20170166685

Oxidatively drying polyurethane dispersions with particularly high chemical resistance

The present invention relates to hydrophilized polyurethanes having a particularly high content of hydroxy-functional, unsaturated triglycerides, to a process for preparing polyurethane dispersions based thereon, to the use of the dispersions as binders in oxidatively drying coating materials having particularly high chemical resistance, and to articles and substrates coated with these coating materials.. . ... Covestro Deutschland Ag

06/08/17 / #20170159189

Method for producing 1,5-diaminonaphthalene and 1-amino-5-nitronaphthalene by direct electrochemical amination of non-activated or deactivated aromatic systems on boron-doped diamond anodes

. . The invention relates to a method for oxidative electrochemical amination of non-activated or deactivated aromatic systems by means of boron-doped diamond anodes, and in particular to the production of 1,5-diaminonaphthalene and 1-amino-5-nitronaphthalene according to said method.. . ... Covestro Deutschland Ag

06/08/17 / #20170158804

Method for producing polyether carbonate polyols

The present invention relates to a method for producing polyether carbonate polyols, wherein: (i) in a first step, (a) carbon dioxide and propylene oxide or (b) carbon dioxide and a mixture of propylene oxide and at least one further alkylene oxide in a ratio by weight of >90:10 are attached to one or more h-functional starting substances in the presence of at least one dmc catalyst; (ii) in a second step, the reaction mixture obtained from step (i) is (ii-1) first chain-lengthened with a mixture containing propylene oxide (po) and ethylene oxide (eo) in a po/eo ratio by weight of 90/10 to 20/80 in the presence of at least one dmc catalyst.. . ... Covestro Deutschland Ag

06/08/17 / #20170157907

Water-vapour permeable composite parts

The invention relates to water-vapour permeable, flat composite parts consisting of at least two layers, at least one layer being made of a polyester and polyether-based thermoplastic polyurethane. The invention also related to the use thereof.. ... Covestro Deutschland Ag

06/01/17 / #20170152535

Recombinant strain producing o-aminobenzoate and fermentative production of aniline from renewable resources via 2-aminobenzoic acid

The invention provides a recombinant microbial host cell capable of converting a raw material comprising a fermentable carbon substrate to o-aminobenzoate biologically. The invention further provides a method for producing aniline, comprising the steps of: a) producing o-aminobenzoate by fermentation of a raw material comprising at least one fermentable carbon substrate using the recombinant microbial host cell of the capable of converting said raw material comprising at least one fermentable carbon substrate to o-aminobenzoate biologically, wherein said o-aminobenzoate comprises anthranilate anion, b) converting said o-aminobenzoate from said anthranilate anion to anthranilic acid by acid protonation, c) recovering said anthranilic acid by precipitation or by dissolving in an organic solvent, and d) converting said anthranilic acid to aniline by thermal decarboxylation in an organic solvent.. ... Covestro Deutschland Ag

06/01/17 / #20170152354

Composite components on the basis of hydrophobic polyols

The present invention relates to the use of hydrophopic polyols for producing fiber composite components on the basis of a polyurethane/polyisocyanurate reaction mixture, to a method for producing composite components and to the composite components as such. The method according to the invention is particularly economical in terms of saving material and time costs and the composite components obtained are characterized by excellent visual and material properties.. ... Covestro Deutschland Ag

06/01/17 / #20170152345

Process for purifying polycarbonate polyols and purifying apparatus therefor

The present invention relates to a purifying apparatus for polycarbonate polyols, especially for removal of cyclic alkylene carbonates, comprising an evaporation unit (1) provided with a heater (10) and having an inlet (6) disposed at the top end thereof and a bottoms vessel (11), and a stripping column (2) connected downstream of the evaporation unit (1) and having a top (21) and a bottom (23), wherein a feed (5) for the polycarbonate polyol to be purified opens into the inlet (6) to the evaporation unit (1) and a gas outlet line (12) and a connecting line which opens into the top (21) of the stripping column (2) and is equipped with a pump (18) depart from the evaporation unit (1), and wherein a gas inlet line (24) for an inert gas opens into the bottom (23) of the stripping column (2) and a product line (27) for the purified polycarbonate polyol departs from the bottom (23) of the stripping column (2) and a gas outlet line (25) departs from the top (21) of the stripping column (2). The invention additionally relates to a process for purifying polycarbonate polyols with such a purifying apparatus.. ... Covestro Deutschland Ag

06/01/17 / #20170152342

Method for the continuous production of stable prepolymers

The invention relates to a method for the continuous production of stable prepolymers based on high-melting diisocyanates, in particular, 1,5-naphthalindiisocyanate, and to the use thereof for producing polyurethane elastomers, in particular casting elastomers.. . ... Covestro Deutschland Ag

06/01/17 / #20170152210

Methods for producing chemical products with operation interruptions

This invention relates to methods for producing chemical products, wherein the one or more feed materials are reacted to form a chemical product or a chemical composition. The invention further relates to plants for performing such methods, said plants being designed in such a way that, during an interruption of the methods, no input of at least one feed material into the reaction occurs and the plant parts not affected by a revision measure, maintenance measure, repair measure, or cleaning measure are operated in so-called re-circulation mode. ... Covestro Deutschland Ag

05/18/17 / #20170137569

Method for producing polyether carbonate polyols

The invention relates to a method for producing polyether carbonate polyols by binding alkylene oxides and carbon dioxide to one or more h-functional starter substance/s in the presence of a double metal cyanide (dmc) catalyst, characterized in that (y) one or more h-functional starter substance/s and dmc catalyst are continuously metered into the reactor during the binding process, and the free alkylene oxide concentration in the reaction mixture amounts to 1.5 to 5.0 wt %, and the obtained reaction mixture is continuously discharged from the reactor.. . ... Covestro Deutschland Ag

05/18/17 / #20170137367

Process for preparation of di- and polyamines of the diphenylmethane series

The present invention relates to a process for preparing di- and polyamines of the diphenylmethane series (mda), a system for producing mda and a process for operating a system for preparing mda. The invention enables optimization of production standstills during operation of the mda process with respect to time expenditure and optionally also with respect to energy and material consumption by means of a so-called recirculation mode for individual system components. ... Covestro Deutschland Ag

05/18/17 / #20170136426

Mixing elements having an improved dispersing effect

The invention relates to mixing elements that have a larger number of basic geometric periods per section and an improved dispersing effect for multi-shaft screw extruders comprising screw shafts that co-rotate in pairs. The invention further relates to the use of the mixing elements in multi-shaft screw extruders, a corresponding screw extruder comprising the mixing elements, and a method for extruding kneadable materials.. ... Covestro Deutschland Ag

05/11/17 / #20170130067

Refractory article and production method thereof

The present invention provides a refractory article which is fire resistant, heat resistant, and light weight, and which is suitable for use as a building material. The refractory article comprises (1) a core material and (2) a refractory layer which covers one or more surface of the core material, and comprises a polyisocyanurate resin. ... Covestro Deutschland Ag

05/04/17 / #20170121449

Composition for producing transparent polythiourethane bodies

. . . . The invention relates to a composition for producing transparent polythiourethane bodies containing or consisting of a) a polyisocyanate component containing at least one polyisocyanate with a functionality of isocyanate groups of at least 2 per molecule, b) a thiol component containing at least one polythiol with a functionality of thiol groups of at least two per molecule, in addition to optionally c) auxiliary agents and additives, the ratio of isocyanate groups to groups reactive in relation to isocyanates being 0.5:1 to 2.0:1. The composition is characterised in that the polyisocyanate of the polyisocyanate component a) is produced by a gas-phase phosgenation of aliphatic, cycloaliphatic, aromatic or araliphatic polyamines. ... Covestro Deutschland Ag

04/27/17 / #20170114082

Isocyanatosilanes with thiourethane structure

The invention relates to a method for producing compounds containing isocyanate and silane groups by reacting at least a) one monomeric diisocyanate containing aliphatically, cycloaliphatically, araliphatically and/or aromatically bonded isocyanate groups with b) a mercaptosilane, characterised in that component a) is reacted with component b) in an equivalent ratio of isocyanate groups to mercapto groups of at least 06:01 to at most 40:1. Furthermore, the invention relates to the products which can be obtained using the method according to the invention, and to a composition containing compounds that contain isocyanate and silane groups. ... Covestro Deutschland Ag

04/27/17 / #20170114000

Process for preparation of di- and polyamines of the diphenylmethane series

The invention relates to a method for the preparation of di- and polyamines of the diphenylmethane series, care being taken during the shutdown of the production process that an excess of aniline and respect to formalin is ensured.. . ... Covestro Deutschland Ag

04/20/17 / #20170107634

Electrochemical process for the reduction of molecular oxygen

The present invention relates to an electrochemical process for the reduction of molecular oxygen in alkaline solutions in the presence of nitrogen-doped carbon nanotubes, in which no hydrogen peroxide forms as a by-product of the reduction.. . ... Covestro Deutschland Ag

04/20/17 / #20170107171

Process for preparation of di- and polyamines of the diphenylmethane series

The invention relates to a method for the preparation of di- and polyamines of the diphenylmethane series (mda) from aniline and formaldehyde, care being taken during the start up that a sufficient excess of aniline with respect to formaldehyde is ensured, said excess amounting to at least 105% of the desired molar ratio of aniline to formaldehyde for the target recipe of the mda to be produced.. . ... Covestro Deutschland Ag

04/13/17 / #20170101368

Process for preparing isocyanates

The invention relates to a method for preparing isocyanates by the phosgenation of the corresponding amines in which problems resulting from the formation of deposits in apparatuses of the reaction segment during activation (starting) and deactivation (termination) of the method can be prevented by processing measures, in particular ensuring that there is a surplus of phosgene relative to the phosgenating amine during the critical starting and termination steps of the method.. . ... Covestro Deutschland Ag

04/13/17 / #20170101367

Method for operating a gas-phase phosgenation plant

This invention relates to a process for operating a gas phase phosgenation plant (100) to form an isocyanate (4) by reacting an amine (2) with phosgene (1), in which the gas phase phosgenation plant is started up by first charging the plant with phosgene. At the same time as, or after the first charge of phosgene, the amine supply devices are rendered inert using a hot inert gas stream (30). ... Covestro Deutschland Ag

04/06/17 / #20170096539

Method for the production of polyurethane foam

The present invention is related to a method for the production of polyurethane foam, comprising the steps of: (1) providing an isocyanate-reactive component a comprising a polyol component a1 which further comprises a physical blowing agent t; (2) combining at least the isocyanate-reactive component a and an isocyanate component b, thereby obtaining a polyurethane reaction mixture; (3) providing the polyurethane reaction mixture in a cavity (11); and (4) reducing the pressure within the cavity (11) to a pressure lower than ambient pressure. The method is characterized in that the cavity (11) is ventilated to ambient pressure before the gel time of the polyurethane reaction mixture is reached.. ... Covestro Deutschland Ag

04/06/17 / #20170096526

Process for the production of polyoxymethylene block copolymers

The invention relates to a process for producing polyoxymethylene block copolymers, comprising the step of activating the dmc catalyst in the presence of an oh-terminated polymeric formaldehyde starter compound by means of a defined amount of alkylene oxide, optionally followed by polymerization with alkylene oxides, if necessary in the presence of other comonomers. The invention further relates to polyoxymethylene block copolymers that can be obtained by means of such a process and to the use of these for producing polyurethane polymers.. ... Covestro Deutschland Ag

04/06/17 / #20170096389

Process for operating a gas phase phosgenation plant

This invention relates to a process for operating a gas phase phosgenation plant (100) to form an isocyanate (4) by reacting an amine (2) with phosgene (1), in which the gas phase phosgenation plant is shut down by first stopping the amine stream and still maintaining the phosgene stream. After a period of time which corresponds to at least 10 times the residence time of phosgene (1) in the main parts of the gas phase phosgenation plant (100) in regular operation, calculated from the time at which the amine inflow has been completely stopped, the feed of phosgene is also stopped. ... Covestro Deutschland Ag

03/30/17 / #20170088659

Catalysts for the synthesis of oxazolidinone compounds

The present invention relates to a method for the production of oxazolidinone compounds with low colour intensity, comprising the step of reacting an isocyanate compound with an epoxide compound in the presence of a catalyst which is free of halide anions. The invention further relates to a method for the production of oligooxazolidinone and/or polyoxazolidinone compounds, comprising the step of reacting a polyisocyanate compound with a polyepoxide compound in the presence of said catalyst. ... Covestro Deutschland Ag

03/23/17 / #20170081463

Thermoplastic polyurethanes, production and use thereof

The invention also relates to thermoplastic polyurethanes and to a method for the production and use thereof.. . ... Covestro Deutschland Ag

03/23/17 / #20170081462

Catalysts for the synthesis of oxazolidinone compounds

The present invention relates to a method for the selective production of oxazolidinone compounds with high activities, comprising the step of reacting an isocyanate compound with an epoxide compound in the presence of an onium salt as catalyst and to the oxazolidinone compounds obtainable by said method. The invention further relates to a polyoxazolidinone compound, obtainable by reacting a polyisocyanate compound with a polyepoxide compound in the presence of an onium salt as catalyst, with a regioselectivity towards the 5-substituted 1,3-oxazolidin-2-one regioisomer of ≧78%.. ... Covestro Deutschland Ag

03/23/17 / #20170081459

Method for the production of polyoxazolidinone polymer compounds

The present invention relates to a method for the production of polyoxazolidinone compounds, comprising the step of reacting an isocyanate compound, preferably a diisocyanate compound with an epoxide compound, preferably a diepoxide compound. The invention further relates to a polyoxazolidinone compound obtainable by said method, a polymeric resin obtainable by reacting a polymeric compound according to the invention with a cross linking compound and the use of a polymeric resin according to the invention as a coating, additive and composite material.. ... Covestro Deutschland Ag

03/23/17 / #20170081187

Process for the production of chlorine using a cerium oxide catalyst in an adiabatic reaction cascade

A process for the production of chlorine by thermo-catalytic gas phase oxidation of hydrogen chloride and oxygen is described, the process comprising at least (1) a cerium oxide catalyst and (2) an adiabatic reaction cascade, containing at least two adiabatic stages connected in series with intermediate cooling, wherein the molar o2/hcl-ratio is equal or above 0.75 in any part of the cerium oxide catalyst beds.. . ... Covestro Deutschland Ag

03/16/17 / #20170073455

Polyurethane composite elements and processes for producing the same

. . A polyurethane composite element has one or more gaps containing a polyurethane foam. The polyurethane foam has a density of 16-40 kg/m3 and a closed cell proportion of 50-90% determined according to astm d6226-2010 standard test method. ... Covestro Deutschland Ag

03/16/17 / #20170073300

Method for producing diaryl carbonates

The invention concerns a method for producing diaryl carbonates from monophenols and phosgene or chloroformic acid aryl esters in the presence of at least one optionally substituted pyridine or the hydrochloride salt thereof as catalyst, and the recovery and reinjection thereof back into the method. The method is carried out at least partially in a liquid phase without the use of an additional solvent, the catalyst being separated by means of distillation and recovered.. ... Covestro Deutschland Ag

03/16/17 / #20170073299

Method for producing diaryl carbonates

The invention concerns a method for producing diaryl carbonates from monophenols and phosgene or chloroformic acid aryl esters in the presence of an optionally substituted pyridine or the hydrochloride salt thereof as catalyst, and the recovery and reinjection thereof back into the method. The method is carried out at least partially in a liquid phase without the use of an additional solvent, the catalyst being separated by means of crystallization and recovered.. ... Covestro Deutschland Ag

03/09/17 / #20170066890

Multi-layer structure having good uv protection and scratch protection

The invention relates to a multi-layer structure containing a thermoplastic substrate, a barrier layer, a uv protection layer, and a cover layer: 1. A thermoplastic substrate material, 2. ... Covestro Deutschland Ag

03/09/17 / #20170066713

Production of aniline via anthraniliate

The invention relates to a method for producing aniline, comprising the steps of: a) providing o-aminobenzoate, wherein said o-aminobenzoate comprises anthranilate anion and a suitable cation, b) converting said anthranilate anion to aniline by thermal decarboxylation in the presence or absence of a catalyst, c) extracting the aniline produced in step b) in an organic solvent at least once, and d) purifying the aniline produced in steps b) and c) by distillation, wherein said distillation produces aniline and a water phase.. . ... Covestro Deutschland Ag

02/23/17 / #20170051120

Composite fibre components and the production thereof

The present invention fiber composite components obtainable, for example, by impregnating fibres with a reactive polyurethane resin mixture of polyisocyanates, polyols, thermo-latent catalysts and optionally additives, and to a method for the production thereof.. . ... Covestro Deutschland Ag

02/16/17 / #20170045816

Aromatic glycol ethers as writing monomers in holographic photopolymer formulations

The invention relates to a photopolymer formulation comprising specific aromatic glycol ethers as writing monomers, matrix polymers and a photoinitiator. The invention further provides an unexposed holographic medium obtainable using an inventive photopolymer formulation, and an exposed holographic medium obtainable by exposing a hologram into an inventive unexposed holographic medium. ... Covestro Deutschland Ag

02/16/17 / #20170044341

Polyurethane foams based on polyether carbonate polyols

The present invention concerns a method for producing polyurethane foams by reacting an isocyanate component with a component that is reactive to isocyanates and that comprises at least one polyether carbonate polyol, the reaction taking place in the presence of a non-amine antioxidant and an amine antioxidant. The invention also concerns polyurethane foams produced using the claimed method and the use of said foams.. ... Covestro Deutschland Ag

02/09/17 / #20170037203

Polyurethane composite material and process of preparing same

The present invention relates to a polyurethane composite material, comprising a polyurethane resin matrix prepared from a polyurethane composition, and a reinforcement material, wherein the polyurethane composition comprises: a) an isocyanate component comprising one or more organic polyisocyanates; b) an isocyanate-reactive component comprising: b1) one or more organic polyols having an amount of 21-60 wt. % based on 100% by weight of the polyurethane composition; b2) one or more (meth)acrylates comprising hydroxyl groups; and c) a radical reaction initiator; wherein the polyurethane resin matrix is prepared under such reaction conditions that the polyurethane composition undergoes addition polymerization reaction of isocyanate groups and hydroxyl groups and radical polymerization reaction simultaneously. ... Covestro Deutschland Ag

02/09/17 / #20170037180

Method of manufacture of press materials

The invention relates to a polyurethane-polyurea binder which contains specific silicones or polyvinyl pyrrolidones and which is suitable for the manufacture of press materials from organic and/or inorganic materials, to the corresponding use of said binders and to the press materials manufactured using the specific binders.. . ... Covestro Deutschland Ag

02/02/17 / #20170029552

Composition containing aromatic nitriles for the production of transparent polythiourethane bodies

The invention relates to a composition for producing transparent polythiourethane bodies, containing or consisting of a) a polyisocyanate component that contains at least one polyisocyanate having an isocyanate group functionality of at least 2 per molecule, b) a thiol component that contains at least one polythiol having a thiol group functionality of at least 2 per molecule, and if appropriate, c) auxiliary and additional agents, the ratio of isocyanate groups to groups that are reactive to isocyanates being between 0.5:1 to 2.0:1, and said composition being characterised in that it also contains d) at least one aromatic nitrile. The invention also relates to a method for producing transparent polythiourethane bodies by reacting such a composition, to the polythiourethane bodies produced in this manner, to the use of aromatic nitriles for producing transparent polythiourethane bodies, and to a mixture of a polyisocyanate and an aromatic nitrile.. ... Covestro Deutschland Ag

01/19/17 / #20170016129

Method for producing catalytically active powders from metallic silver or from mixtures of metallic silver with silver oxide for producing gas diffusion electrodes

The invention relates to an electrochemical method for producing catalytically active powder from mixtures of metallic silver, optionally with silver oxides, which are particularly suitable for use in oxygen-consuming electrodes, in particular for use in chlor-alkali electrolysis. The invention also relates to the use of said electrodes in chlor-alkali electrolysis or fuel cell technology or in metal/air batteries.. ... Covestro Deutschland Ag

01/12/17 / #20170010400

Viewing angle switchable back light unit

The present disclosure relates to a viewing angle switchable back light unit in which the general mode and the privacy mode in a liquid crystal display can be selected. The present disclosure suggests a thin film type back light unit comprising: a light guide film including a light entering part disposed at one side, a light changing part disposed at other side and a light guiding part connecting the light entering part and the light changing part; a light radiating part disposed on an upper surface of the light guide film; and a light source disposed at the light entering part of the light guide film. ... Covestro Deutschland Ag

01/12/17 / #20170009021

Polysiloxane-polycarbonate block cocondensates with improved rheological properties

The present invention relates to polysiloxane-polycarbonate block cocondensates comprising particular siloxane domains and having improved rheological properties and good mechanical properties as well as to mouldings and extrudates made from these polysiloxane-polycarbonate block cocondensates.. . ... Covestro Deutschland Ag

01/05/17 / #20170002247

Thermally conductive thermoplastic compositions featuring balanced processability

The invention relates to thermally conductive thermoplastic compositions with balanced processing capacity, i.e. With a balanced proportion of melt volume flow rate to heat distortion resistance, comprising a thermoplastic, an expanded graphite, at least one phosphorus compound, and also ethylene/alkyl (meth)acrylate copolymer.. ... Covestro Deutschland Ag








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