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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


High-temperature-resistant foams having high flame retardancy

The invention relates to high-temperature-resistant foams having excellent flame retardancy, to the production thereof from organic polyisocyanates and polyepoxides, and to the use of said foams.... Covestro Deutschland Ag

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... Covestro Deutschland Ag

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.... Covestro Deutschland Ag

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... Covestro Deutschland Ag

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

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... Covestro Deutschland Ag

Porous body, additive manufacturing the body and 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... Covestro Deutschland Ag

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... Covestro Deutschland Ag

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... Covestro Deutschland Ag

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

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

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

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... Covestro Deutschland Ag

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

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... Covestro Deutschland Ag

Aqueous compositions for treating seeds, seeds treated therewith, and methods for treating seeds

Disclosed are seed treatment compositions that include: (a) an aqueous polyurethane dispersion; and (b) an insecticide, a fungicide, a nematicide, and/or other pesticides. Also disclosed are seeds treated with such a treatment compositions and methods for treating a seed using such treatment composition.... Covestro Deutschland Ag

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. and a pressure of ≧1... Covestro Deutschland Ag

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)... Covestro Deutschland Ag

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)... Covestro Deutschland Ag

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

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

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

said catalyst being characterised in that “low” A values (i.e. equal to or lower than 8.0) are combined with “high” B values (i.e. of from 1.50 to 3.00), and “high” A values (i.e. larger than 8.00, especially equal to or larger than 8.50) are combined with “low” B values (i.e.... Covestro Deutschland Ag

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

Method for producing an optical cast body having a holographic optical element, and optical cast body

removing the cured casting material comprising the at least one holographic optical element from the casting mould, the at least one holographic optical element being at least partly surrounded by the casting material.... Covestro Deutschland Ag

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... Covestro Deutschland Ag

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

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

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,... Covestro Deutschland Ag

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. In addition, the diglycerol esters also exert a positive effect on the optical properties by increasing the transmission of the compositions and reducing... Covestro Deutschland Ag

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... Covestro Deutschland Ag

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

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... Covestro Deutschland Ag

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

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

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

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... 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... 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... 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,... Covestro Deutschland Ag

11/02/17 / #20170313816

Moisture-curing polyether carbonate containing alkoxysilyl groups

The present invention relates to a method for producing polyether carbonates containing alkoxysilyl groups in which (a) an unsaturated polyether carbonate polyol is reacted with (b) an alkoxysilane compound of formula (II) Si(X)m(R1)n(R2)o (II), where X=H, Y—S—H and Y=C1-C22 alkylene, C6-C14 arylene, C7-C14 aralkylene, C7-C14 alkylarylene; R1=C1-C8 alkoxy, C7-C20-aralkoxy, C6-C14... 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... 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... 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

10/19/17 / #20170298524

Oxygen-consuming electrode and producing same

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

10/12/17 / #20170291869

Exhaust gas cleaning in a 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... 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

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. The... Covestro Deutschland Ag

10/05/17 / #20170283964

Oxygen-consuming electrode which contains carbon nanotubes and 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... 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... 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... 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... 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... 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 / #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

08/10/17 / #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... 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 / #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... Covestro Deutschland Ag

08/10/17 / #20170227294

Apparatus and 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... 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... 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... 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

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... 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

Patent Packs
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

07/20/17 / #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 / #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)... Covestro Deutschland Ag

07/13/17 / #20170199494

Selection 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... 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... 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... 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

06/08/17 / #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

06/08/17 / #20170158798

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

B) acid-treated without any alkaline treatment preceding or following said acid treatment, wherein the acid treatment is effected with an organic acid with chelating function.... 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... 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

06/01/17 / #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... 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

Patent Packs
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... 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... 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... Covestro Deutschland Ag

05/25/17 / #20170144963

Method for producing toluenediamine

The invention concerns a method for producing toluenediamine by hydrogenation of dinitrotoluene in the presence of a catalyst, a dinitrotoluene being used as starting material and being processed by applying an electrical voltage.... 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... 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... 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... Covestro Deutschland Ag

05/11/17 / #20170129177

Use of thermoplastic polyurethane powders

The present invention relates to the use of thermoplastic polyurethane powders in powder-based additive manufacturing methods for the production of elastic articles.... Covestro Deutschland Ag

05/11/17 / #20170130019

Polyurethane composite material and process for preparing same

The present invention relates to a process for preparing a polyurethane composite material, comprising steps of: I) preparing a premolded polyurethane molding body, wherein the premolded polyurethane molding body is prepared from a polyurethane composition under a condition that isocyanate groups and isocyanate-reactive groups comprised in the polyurethane composition undergo... 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... Covestro Deutschland Ag

05/04/17 / #20170121447

Polyisocyanates having thioallophanate structure

to a method for producing them, and to their use as starting components in the production of polyurethane plastics.... 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... Covestro Deutschland Ag

05/04/17 / #20170121450

Thioallophanate polyisocyanates containing silane groups

in which R1, R2 and R3 are identical or different radicals and are each a saturated or unsaturated, linear or branched, aliphatic or cycloaliphatic radical or an optionally substituted aromatic or araliphatic radical having up to 18 carbon atoms, where said radical may optionally contain up to 3 heteroatoms from... 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

04/27/17 / #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... 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... 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

04/13/17 / #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... 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... 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... 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... 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,... Covestro Deutschland Ag








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