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Wacker Chemie Ag patents


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

ARCHIVE: New 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 | Company Directory "W" | Wacker Chemie Ag-related inventors


Organosilicon compounds having amino acid moieties, and process for preparation thereof

The invention provides a process for preparing organosilicon compounds (o) which contain free amino acid moieties and contain at least one unit of the general formula (i) and no unit or at least one unit of the general formula (ii), r1b(x)csio[4−(b+c)]/2 (i), r2asio(4−a)/2 (ii), in which epoxy-functional organosilicon compounds composed of at least one unit of the general formula (iii) and no unit or at least one unit of the general formula (ii), r1b(z)csio[4−(b+c)]/2 (iii), r2asio(4−a)/2 (ii), where z has the definition (formula a), are reacted with unprotected amino acids of the general formula (iv): h—nr7—(ch2)f—cr8r9—cooh, in the presence of aliphatic alcohols, where r1, r2, r4, r5, r6, r7, r8, r9, x, z, y, a, b, c, e and f have the definitions given in claim 1, the organosilicon compounds (o) which contain free amino acid moieties and are prepayable by the process, and uses for the organosilicon compounds (o).. . ... Wacker Chemie Ag

Wacker Chemie Ag

. . ... Wacker Chemie Ag

Polymers for dirt-repellent coatings

The present invention relates to aqueous dispersions or polymer powders which are redispersible in water, based on a) 2-ethylhexylacrylate, b) n-butylacrylate, c) one or more ethylenically unsaturated monomers, the homopolymer of which has a glass transition temperature tg of ≥50° c., d) optionally one or more ethylenically unsaturated monomers containing acid groups, e) optionally one or more ethylenically unsaturated monomers containing silane groups and f) optionally one or more additional ethylenically unsaturated monomers which are different to the aforementioned monomers, characterised in that the polymers are based on 2-ethylhexylacrylate from 60 to 99 wt % and on n-butylacrylate from 1 to 40 wt %, each relative to the total weight of ethylhexylacrylate a) and n-butylacrylate b).. . ... Wacker Chemie Ag

Apparatus for conveying a product stream of chunk polysilicon or granular polysilicon

Foreign objects in a conveyed product stream of granular or chunk polysilicon is effected by identifying the foreign objects by eddy current sensors in the conveyor by which the granular or chunk polysilicon is being conveyed.. . ... Wacker Chemie Ag

Packaging of polysilicon

Reduction of contamination and the proportion of fines fractions in the packaging of rod form polysilicon is achieved by directly filling a plastic bag with polysilicon from a cleaning bowl by a rotating motion which causes polysilicon chunks to slide into the bag.. . ... Wacker Chemie Ag

Hydrophobic aerogels comprising low occupancy of monofunctional units

The problem addressed by the invention is that of producing aerogels which have as high and permanent a hydrophobicity as possible and which have a reduced combustibility, that is as low a carbon content as possible, and are simultaneously less rigid and brittle than known systems, i.e. Which with reduced combustibility have a high flexibility and high stability at the same time, that is high mechanical load-bearing capacity. ... Wacker Chemie Ag

Carpet coating compositions

The invention relates to the use of mixtures that contain an aqueous dispersion of a vinyl acetate polymer and an aqueous dispersion of a vinyl acetate-ethylene copolymer for carpet coating compositions, and corresponding carpet coating compositions, as well as carpets which are coated with such carpet coating compositions.. . ... Wacker Chemie Ag

Process for producing organically modified aerogels

It is an object of the invention to provide an economically viable process for the production of hydrophobized aerogels which works both inexpensively and in a resource-conserving manner. 2.2. ... Wacker Chemie Ag

Method for producing organosilicon compounds having amino acid groups

The present invention relates to a method for producing amino acid group-containing organosilicon compounds (o), wherein the epoxy group-bearing organosilicon compounds are reacted with a stoichiometric excess of amino acids or the salts thereof in the presence of an alcohol.. . ... Wacker Chemie Ag

Economically viable process for producing organically modified lyo- or aerogels

It is an object of the invention to provide a rapid and economically viable process which is notable for efficient use of material, especially of the silylating agent, and by means of which organically modified lyo- or aerogels are obtained in a rapid and simple manner. This object is achieved by virtue of the invention providing a process for producing organically modified gels selected from lyo- and aerosols by (i) emulsifying a basic polar phase comprising water and starting materials for silicatic gels in a nonpolar phase containing a water-immiscible precursor for an active silylating agent, (ii) starting formation of gel and ageing by lowering the ph, and then (iii) starting the silylation and the exchange of solvent by lowering the ph. ... Wacker Chemie Ag

Fluidized bed reactor for preparing chlorosilanes

The lifetime of a fluidized bed reactor containing silicon particles, for the production of chlorosilanes is greatly extended by armoring at least a portion of the reactor shell interior wall with expanded metal coated with a cement containing ceramic particles.. . ... Wacker Chemie Ag

Apparatus and method for classifying and dedusting granular polysilicon

Granular polysilicon is fed into a screening plant, divided into two or more fractions by means of one or more screen surfaces, and thereby classified and dedusted wherein a throwing motion of the granular polysilicon in the screening plant removes adhering dust particles from the granular polysilicon, the removed dust particles are taken off from the screening plant by means of a gas flow supplied to the screening plant, and the screening plant is of gas-tight design and supply and takeoff of the gas flow are effected such that the screening plant is at a positive pressure compared to the surroundings.. . ... Wacker Chemie Ag

Packaging for polysilicon and method for packaging polysilicon

Reduction of contamination and the proportion of fines fractions in the packaging of rod form polysilicon is achieved by directly filling a plastic bag with polysilicon from a cleaning bowl by a rotating motion which causes polysilicon chunks to slide into the bag.. . ... Wacker Chemie Ag

Method for preparing silicone resins containing hydroxy groups and alkoxy groups

The chlorohydrocarbon content of silicone resins prepared from alkoxysilanes is reduced by reacting alkoxysilane and 0.01-1 pbw chlorinated hydrocarbons with water at at least 50° c. And for at least 30 minutes, in the absence of a water immiscible solvent.. ... Wacker Chemie Ag

03/29/18 / #20180086644

Polycrystalline silicon rod pair and method of producing polycrystalline silicon

Polycrystalline silicon is produced by depositing polycrystalline silicon onto u-shaped slim rods, deinstalling at least one polycrystalline silicon rod pair from the reactor, removing graphite residues from the electrode-side ends of the polycrystalline silicon rods of the polycrystalline silicon rod pair, and comminuting the polycrystalline silicon rods into rod pieces or into chunks, wherein prior to deinstallation of the polycrystalline silicon rod pairs from the reactor, the polycrystalline silicon rod pairs are at least partially with a plastics material bag made of a plastics material film having a thickness of more than 150 μm, wherein the plastics material bag comprises weights at its opening. The invention further relates to a polycrystalline silicon rod pair which has a rod diameter of 190 mm or more and is covered by a plastics material bag made of a plastics material film having a thickness of more than 150 μm.. ... Wacker Chemie Ag

03/08/18 / #20180066115

Silicone compositions for producing elastomeric molded parts by means of ballistic methods

3d printing of curable silicone cam positions is made possible by employing a mixture of si—h-functional silicon compounds and silicon compounds bearing aliphatically unsaturated groups, a hydrosilylation catalyst, and a combination of a reinforcing filler and a rheological agent containing polar groups, exhibiting shear thinning behavior.. . ... Wacker Chemie Ag

03/08/18 / #20180065858

Process for producing polycrystalline silicon

Deposition on a sightglass in a reactor for cvd deposition of silicon is reduced by conducting a first purge gas stream substantially parallel to the reactor end surface of the sightglass, and conducting a second purge gas stream within the sightglass tube at an angle from the sightglass surface toward the interior of the reactor.. . ... Wacker Chemie Ag

03/01/18 / #20180055328

Adsorption of particles on a material containing a silicone polymer

A device for the dry cleansing of surfaces to remove particulates contains triboelectrically chargeable component(s) of an organic polymer material containing uniformly distributed finely divided silicone polymer particles.. . ... Wacker Chemie Ag

02/15/18 / #20180044188

Method for producing organically modified aerogels

The invention relates to a method for producing organically modified aerogels. The problem addressed by the invention is that of providing an economical method for producing hydrophobic aerogels which can be implemented cost-effectively, simply, and safely, and which operates to save on resources. ... Wacker Chemie Ag

02/15/18 / #20180043324

Method for producing pulverulent solids from alkali salts of silanols

Pulverulent alkali metal alkyl siliconates having lesser hydroscopicity and improved hydrophobicity in construction materials are produced by spray drying an aqueous solution of an alkali metal alkylsiliconate having a defined range of alkali metal content, a low alcohol content, and a low chlorine content.. . ... Wacker Chemie Ag

02/08/18 / #20180036953

Method for producing molded bodies

3d moldings are prepared by applying a viscoelastic supportive material comprising a polyether and a particulate reheological additive in at least some positions where a curable structure forming material is not desired, and following completion of the molding, the supportive material is removed.. . ... Wacker Chemie Ag

02/01/18 / #20180030274

Aqueous dispersions of organosilicon compounds

Aqueous dispersions which are storage stable and cure to tack-free elastomers upon removal of water contain water, alkoxysilyl-terminated polyethers and alkoxy-functional siloxanes, optionally catalysts, fillers, and other additives customary in dispersions of organosilicon compounds.. . ... Wacker Chemie Ag

01/18/18 / #siloxanes which are liquid at 25° c. and 1 bar, have 2% to 12% by weight of silanol groups and are of the formula (1):

Wacker Chemie Ag

. . ... Wacker Chemie Ag

01/18/18 / #20180016141

Method for purifying contaminated gaseous hydrogen chloride

Impure gaseous hydrogen chloride from organochlorosilane hydrolysis is freed of impurities by first scrubbing with an organochlorosilane, which may be the same or different from the organochlorosilane(s) hydrolyzed, and then further scrubbing with chloromethane. The purified gaseous hydrogen chloride is preferably used in chlorosilane synthesis.. ... Wacker Chemie Ag

01/11/18 / #20180010027

Branched organosiloxanes used as heat transfer fluid

The invention relates to a method for operating a system at an operating temperature of between 300° c. And 500° c., using a heat transfer fluid comprising branched siloxanes of general formula (i) (r3sio1/2), (sio4/2) in which w represents integral values of between 4 and 20, z represents integral values of between 1 and 15, and r represents a methyl group, the sum of the fractions of all siloxanes of general formula (1) being at least 95 mass %, in relation to the whole heat transfer fluid.. ... Wacker Chemie Ag

01/04/18 / #20180002467

Method for polymerising ethylenically unsaturated monomers

The invention relates to a method for polymerising ethylenically unsaturated monomers by free-radical initiated emulsion polymerisation in an aqueous medium in a polymerisation reactor, wherein the inside walls and optionally also the fittings in the reactor are coated by applying a deposit-inhibiting product before the reactor is filled, characterised in that the surfaces that are to be coated with deposit-inhibiting product are treated with an acid solution.. . ... Wacker Chemie Ag

12/28/17 / #20170373349

Nitriles and amines as electrolyte components for lithium-ion batteries

An electrolyte containing vinylene carbonate, an amine, a nitrile, and a conductive lithium salt is useful in lithium ion batteries to improve discharge retention after multiple charge/discharge cycles.. . ... Wacker Chemie Ag

12/28/17 / #20170369740

Cross-linkable coating compounds based on organyl-oxysilane-terminated polymers

Floor coatings with improved properties are prepared from alkoxysilyl-functional polymers, silicone resins with a high alkoxy group content, and a filler component, at least a portion of which contains large particle sizes.. . ... Wacker Chemie Ag

12/21/17 / #an electrolyte suitable for use in lithium ion batteries contains

Wacker Chemie Ag

. . ... Wacker Chemie Ag

12/07/17 / #20170349717

Platinum complexes and their use in compounds that can be cross-linked by a hydrosilylation reaction

Cyclopentadienyl platinum complexes bearing ethylenic unsaturation are efficient photocatalysts for hydrosilylation of compounds containing aliphatic carbon-carbon multiple bonds, while exhibiting extended dark time, and are particularly useful in addition-curable organopolysiloxane compositions.. . ... Wacker Chemie Ag

12/07/17 / #20170349709

Method for producing organopolysiloxanes

Highly condensed silicon resins are obtained by a three step continuous procedure without the use of organic solvent, by preliminarily forming a partial alkoxylate by reacting a chlorosilane with alcohol containing no or a minimal amount of water, feeding the partial alkoxylate to a reaction column to form a silicone resin of low degree of condensation, and further condensing the silicone resin intermediate thus formed to produce a silicone resin product.. . ... Wacker Chemie Ag

12/07/17 / #20170349443

Reactor for the deposition of polycrystalline silicon

Reflective silver coatings on the inside surfaces of a siemens reactor for polycrystalline silicon production are improved by a cold forming after-treatment of the silver coating.. . ... Wacker Chemie Ag

11/30/17 / #20170342221

Polymer master batch containing linear, ultra high molecular polydimethylsiloxanes devoid of vinyl groups

Polymer masterbatches useful for producing polymer compositions with improved abrasion resistance include a polypropylene homopolymer and a polydimethylsiloxane having a molecular weight >200,000 g/mol and being free of vinyl groups.. . ... Wacker Chemie Ag

11/30/17 / #20170342216

Crosslinkable organopolysiloxane compositions

Moisture curable rtv-1 compositions with rapid curing and a modulus which is adjustable over a wide range include organopolysiloxanes having on-chain and side-chain silicon-bonded α-aminoalkyl groups and at least on average two silicon-bonded alkoxy groups, trialkoxyorganylsilanes and/or tetraalkoxysilanes, and organopolysiloxanes bearing alkoxysilyl groups.. . ... Wacker Chemie Ag

11/30/17 / #20170341136

Oil-in-water silicone emulsion composition for die casting release agent

Organopolysiloxane emulsions having improved release properties when employed in die casting, contain an organopolysiloxane with long chain alkyl groups and/or aryl groups, and a partially hydrophobicized silica as an emulsifying agent.. . ... Wacker Chemie Ag

11/30/17 / #20170341023

Removal of oxygen from hydrocarbon-containing gas mixtures

The invention relates to a method for removing oxygen from hydrocarbon-containing gas mixtures, characterized in that a hydrocarbon-containing gas mixture containing 50 vol % of one or more hydrocarbons, 2 to 10 vol % of oxygen, and possibly one or more gases from the group comprising nitrogen, noble gases, hydrogen, carbon dioxide, carbon monoxide, and water is introduced into an isothermally operated reactor, in which the oxygen contained in the hydrocarbon-containing gas mixture is at least partially converted into carbon dioxide and water in the presence of one or more catalysts, wherein the specifications in vol % relate to the total volume of the hydrocarbon-containing gas mixture introduced into the reactor and add up to 100 vol % in total.. . ... Wacker Chemie Ag

11/23/17 / #20170334729

Processes for producing silicon

Silicon is produced by magnesiothermic reduction of silicon dioxide, wherein to achieve magnesiothermic reduction a reactant mixture is employed which contains silicon dioxide (sio2) and magnesium (mg) and, as moderators, magnesium oxide (mgo) and silicon (si), and optionally further moderators.. . ... Wacker Chemie Ag

11/09/17 / #20170321375

Water-redispersible polymer powders for carpet coating compositions

The use of redsipersible polymer powders containing no organic emulsifier for a binder in the production of carpeting is surprisingly superior to use of the same polymers in the form of an aqueous dispersion. Tuft removal force in particular, is improved. ... Wacker Chemie Ag

11/09/17 / #20170321039

Curable, highly transparent silicone composition with improved mechanics, for optical components

Cast silicone compositions with high transparency suitable for use as optical components contain a base polymer with a refractive index≧1.42, and a reinforcing particulate silica which is surface modified to have a refractive index within 0.03 of the refractive index of the base polymer, by reaction with an aryl-silane or aryl-siloxane.. . ... Wacker Chemie Ag

11/09/17 / #20170321015

Method for the hydrophobic impregnation of fired ceramic molded bodies

Fired clay moldings are hydrophobicized by applying a long chain alkyl-substituted alkoxysilane or hydrolysate thereof having up to 5 silicon atoms, and an alkoxy-functional silicone resin. The moldings, which may be roof tiles, are hydrophobicized to a significant depth, without discoloration.. ... Wacker Chemie Ag

11/09/17 / #20170320896

Production of isocyanate functional organosilanes

Isocyanate-functional silanes are prepared in high yield by pyrolysis of an o-carbamate prepared by reaction of a dialkylcarbonate with an aminoalkyl-functional silane in the presence of a basic catalyst, where the catalyst is neutralized by an acid which has a pka of all protolysis stages of not more than 4. The neutralized or partially neutralized catalyst need not be removed prior to pyrolysis. ... Wacker Chemie Ag

11/09/17 / #20170320035

Fluidized bed reactor for producing polycrystalline silicon granules and method for the assembly of such a fluidized bed reactor

Assembly of a fluidized bed reactor for the preparation of polycrystalline silicon granules by chemical vapor deposition of silicon onto seed particles and removal of polycrystalline silicon granules is facilitated without breakage and with gas tightness by a specific assembly sequence.. . ... Wacker Chemie Ag

10/26/17 / #20170306477

Device for insulating and sealing electrode holders in cvd reactors

Siemens cvd reactors are sealed in a manner which facilitates long production campaigns without refurbishing the seals, by the use of at least two seals, and an electrically insulating member having a thermal conductivity of from 1 to 200 w/mk, a sustained use temperature of at least 400° c., and a resistivity of more than 1-109 Ωcm.. . ... Wacker Chemie Ag

10/26/17 / #20170306097

Method for producing organofunctional silicone resins

Organofunctional organopolysiloxanes resins are prepared by reaction of a reactive silicone resin with a symmetrically substituted disiloxane in the presence of a heterogeneous activated silicate catalyst.. . ... Wacker Chemie Ag

10/26/17 / #20170305940

Process for silane oligomer compostition preparation and use thereof

Epoxy silane oligomers are prepared from a glycidoxypropyl alkoxysilane in the presence of an alcohol and an esterification and/or transesterification catalyst, and have improved storage stability. The oligomers are particularly useful as scrub-resistant additives for aqueous architectural coatings.. ... Wacker Chemie Ag

10/26/17 / #20170305939

Method for the direct synthesis of methyl chlorosilanes in fluidized-bed reactors

Methylchlorosilanes are synthesized by an at least two stage reaction in which contact composition from a first fluidized bed reactor is fed to a second fluidized bed reactor.. . ... Wacker Chemie Ag

10/26/17 / #20170305748

Method for producing polycrystalline silicon

The rate of rod fallover in the production of polycrystalline silicon by the siemens process is sharply reduced by cleaning the siemens reactor base plate by at least a two-step procedure comprising suctioning the base plate in one step, and subsequently cleaning with liquid or solid cleaning medium in a second step, between each phase of rod removal and new support body installation.. . ... Wacker Chemie Ag

10/05/17 / #20170283654

Aqueous coating materials

Silicone resin dispersions containing at least one silicone resin having at least two differently substituted t units are used in aqueous coating materials producible therefrom for mineral building materials, wood or metal. The aqueous coating materials exhibit good hydrophobicity without beading, low water permeability, and acquire these properties rapidly after application.. ... Wacker Chemie Ag

10/05/17 / #20170283559

Organopolysiloxane compositions which can be crosslinked by means of a condensation reaction

Moisture curable elastomer compositions are highly suitable for use as sealants, and initially contain an organopolysiloxane having condensable groups, a tri-acyloxy functional organosilicon compound, and as fillers, anhydrite and silica. The compositions have very low modulus and accommodate high joint movement, while being storage stable. ... Wacker Chemie Ag

09/14/17 / #20170260336

Cross-linkable masses based on organyl-oxysilane-terminated polymers

Moisture curable compositions having a low modulus and a high resilience are prepared by curing a composition containing a first polymer which predominately contains two moisture-curable silyl groups, and a second polymer which is terminated by an alkoxy group and contains but a single moisture-curable silyl group, or a hydroxyl group.. . ... Wacker Chemie Ag

09/07/17 / #20170253759

Aqueous, polyvinyl alcohol stabilized vinyl acetate-ethylene-copolymer dispersion having high filler compatibility for carpet coating compositions

The invention relates to an aqueous vinyl acetate-ethylene-copolymer dispersion for carpet coating compositions, which is obtained by means of radical-initiated emulsion polymerization, in an aqueous medium, of vinyl acetate and ethylene and optionally additional ethylenically unsaturated comonomers, characterized in that, for stabilization of the dispersion, 5 to 10 wt %, based on the total weight of the comonomers, of one or a plurality of partially saponified and low-molecular polyvinyl alcohols having a hydrolysis degree of 80 to 95 mol % and a höppler viscosity, in 4% aqueous solution, of 1 to 5 mpas (method according to höppler at 20° c., din 53015) are contained.. . ... Wacker Chemie Ag

08/31/17 / #nanoemulsions are prepared by:

Wacker Chemie Ag

. . ... Wacker Chemie Ag

08/03/17 / #nanoemulsions are prepared by:

Wacker Chemie Ag

. . ... Wacker Chemie Ag

07/27/17 / #20170210957

Cross-linkable materials based on organyl-oxysilane-terminated polymers

A composition containing an alkoxysilyl-functional polymer, a phenylsilicone resin, and a non-reactive plasticizer, when cured, exhibits very high elongation without loss of tensile strength. The compositions are particularly well suited for flexible adhesives.. ... Wacker Chemie Ag

07/27/17 / #20170210856

Curable organopolysiloxane compositions

Artificial stone having excellent mechanical and weatherability properties is prepared from a highly filled crosslinkable organosilicon composition where the filler comprises at least 20 weight percent of coarse fillers, the organosilicon component contains silicon-bonded alkoxy and or hydroxyl groups, with a catalyst containing a metal compound and an amidine or guanidine.. . ... Wacker Chemie Ag

07/27/17 / #20170208828

Fatty acid vinyl ester copolymers with wax qualities

Subject-matter of the invention are processes for preparing fatty acid vinyl ester copolymers by radically initiated polymerization of a) one or more vinyl esters of carboxylic acids having 16 to 22 carbon atoms and b) one or more vinyl esters of carboxylic acids having 2 to 15 carbon atoms, with one or more vinyl esters a) and one or more vinyl esters b) being metered in during the polymerization, characterized in that during the polymerization either the metering rate of vinyl ester a) or the metering rate of vinyl ester b) is reduced and the metering rate of the other of the two vinyl esters, a) or b), is increased.. . ... Wacker Chemie Ag

07/20/17 / #20170204520

Plastics material substrate having a silicon coating

Plastic material-comprising surfaces of a substrate are coated with elemental silicon by cold gas spraying by injecting a powder containing silicon into a gas and powder with a high velocity onto the substrate surface, such that the silicon forms a firmly adherent coat on the substrate surface comprising the plastics material. Apparatuses having such silicon-coated surfaces are useful in minimizing contamination of polycrystalline silicon production, processing, packaging, and transport.. ... Wacker Chemie Ag

07/13/17 / #20170198101

Cross-linkable masses based on organyloxysilane-terminated polymers

The objectionable odor of one component condensation curable organopolysiloxane compositions is eliminated by replacing all or the most substantial part of water scavenger vinyltrimethoxysilane with a phenyltrialkoxysilane, without compromising storage or curing properties.. . ... Wacker Chemie Ag

06/22/17 / #20170179478

Polymer composition as a binder system for lithium-ion batteries

The invention relates to an electrode coating for a lithium-ion battery, containing copolymer c or the salt thereof, copolymer c being synthesized by polymerizing a combined total of more than 70 wt % of vinyl-functional cyclic carbonate and one or more monomers from the group comprising acrylic acid and the derivatives thereof, the percentage by weight of vinyl-functional cyclic carbonate in relation to the weight of all monomers used being 5-90%.. . ... Wacker Chemie Ag

06/22/17 / #20170174866

Process for producing organopolysiloxane compositions

Organopolysiloxane compositions are prepared with high throughput and less process time, by a process in which organopolysiloxanes, processing aids and fillers are mixed and kneaded in the presence of water to give raw mixtures and the raw mixtures are subsequently devolatilized and freed of water in a heating and devolatilizing step at temperatures in the range from 100° c. To 250° c.. ... Wacker Chemie Ag

06/15/17 / #20170166595

Method for producing siloxanes from alkali salts of silanols

Cyclic siloxanes are prepared economically by reaction of an alkali metal siliconate having a mol ratio of alkali metal cation to silicon of less than one or their hydrolysis/condensation products or mixture thereof, with a halosilane.. . ... Wacker Chemie Ag

06/15/17 / #20170166511

Process for ruthenium-catalysed transvinylation of carboxylic acids

A process for selective transvinylation of a reactant carboxylic acid with a reactant vinyl ester to give a product vinyl ester and the corresponding acid of the reactant vinyl ester in the presence of one or more ruthenium catalysts, wherein a) the reactant vinyl ester, the reactant carboxylic acid and the ruthenium catalyst are supplied to a reactor, wherein b) the molar ratio of reactant vinyl ester to reactant carboxylic acid is 1:3 to 3:1, and c) the transvinylation reaction is conducted, d) on completion of the transvinylation reaction, the reactant vinyl ester and the corresponding acid are separated from the reaction mixture by distillation, e) the product vinyl ester is separated by distillation from the bottom product of the distillation, and f) the remaining reaction mixture is recycled into the reactor.. . ... Wacker Chemie Ag

06/08/17 / #20170159174

Reactor for producing polycrystalline silicon and method for removing a silicon-containing layer on a component of such a reactor

Silicon deposited by cvd and/or silico dust is removed from a polycrystalline silicon deposition reactor component by abrasion with silicon-containing particles in a gas stream.. . ... Wacker Chemie Ag

06/08/17 / #20170158600

Process for ruthenium-catalysed transvinylation of carboxylic acids

A process for selective transvinylation of a reactant carboxylic acid with a reactant vinyl ester to give a product vinyl ester and the corresponding acid of the reactant vinyl ester in the presence of one or more ruthenium catalysts, wherein a) the reactant vinyl ester, the reactant carboxylic acid and the ruthenium catalyst are supplied to a reactor, and b) the transvinylation reaction is conducted, wherein c) the transvinylation reaction is conducted at a conversion of more than 50%, d) on completion of the transvinylation reaction, the reactant vinyl ester and the corresponding acid are separated from the reaction mixture by distillation, e) the product vinyl ester is separated by distillation from the bottom product of the distillation, and f) the remaining reaction mixture is recycled into the reactor.. . ... Wacker Chemie Ag

06/08/17 / #20170158516

Fluidized-bed reactor and process for preparing granular polycrystalline silicon

A fluidized-bed reactor for preparing granular polycrystalline silicon has a reactor vessel, a reactor tube and a reactor bottom within the reactor vessel, and an intermediate jacket located between the reactor tube and the reactor vessel, a heating device, at least one bottom gas nozzle for introducing of fluidizing gas and at least one secondary gas nozzle for introducing reaction gas, a silicon seed particle feed, an offtake line for granular polycrystalline silicon and reactor offgas discharge, wherein a main element of the reactor tube comprises at least 60% by weight of silicon carbide with a cvd coating having a layer thickness of at least 5 μm and is at least 99.995% by weight of sic, or a main element of the reactor tube is a sapphire glass comprising at least 99.99% by weight of α-al2o3.. . ... Wacker Chemie Ag

06/08/17 / #20170157807

Production of thin silicone films

Thin silicon films of high thickness uniformity and thicknesses of from 0.1 μm to 200 μm are prepared by applying a crosslinkable silicone composition to a moving carrier by means of a slot die, removing solvent, if present, and subsequently crosslinking the silicone layer formed on the carrier.. . ... Wacker Chemie Ag

06/01/17 / #20170152491

T7 expression system, method for its production and use thereof for producing recombinant proteins

The invention relates to an expression system comprising a prokaryotic cell which contains a polynucleotide construct that encodes a t7 rna polymerase under the control of a t7 promoter and under the control of an inducible promoter. The invention also relates to an expression vector which contains a gene that encodes a protein to be expressed under the control of a t7 promoter, characterized in that said expression vector comprises a plasmid stabilization system.. ... Wacker Chemie Ag

06/01/17 / #20170152208

Method for providing an active ruthenium catalyst solution for the transvinylation of carboxylic acids

The invention relates to a method for providing a ruthenium catalyst solution which is active during the transvinylation of a surfactant vinyl ester with a surfactant carboxylic acid, comprising an ru metal concentration of more than 0.5 wt. % based on the total weight of the ruthenium catalyst solution. ... Wacker Chemie Ag

05/18/17 / #20170137677

Compositions on the basis of organyloxysilane-terminated polymers

Moisture-curing adhesives simultaneously having high tensile strength and elongation are prepared by admixing a silane-terminated polyurethane or polyether polymer having a defined and limited molecular weight, finely divided silica, and an organosilicon compound containing basic nitrogen.. . ... Wacker Chemie Ag

05/18/17 / #20170137445

Method for producing powders from alkali salts of silanols

Alkali metal siliconates with low contents of water and alcohol are economically prepared in a three stage process where organoalkoxysilanes are reacted with a basic alkali metal salt to form an alcohol-rich hydrolysate, the hydrolysate is dried to a powder containing 0.5-5 wt. % alcohol, and residual alcohol is reduced in a post-treatment third step.. ... Wacker Chemie Ag

05/04/17 / #20170121535

Compositions of aminosiloxanes, alkoxysilicon compounds and metal carboxylates

Compositions containing an aminoalkyl-containing polydimethylsiloxane, a silicon compound containing silicon-bonded alkoxy groups, and a zirconium, titanium, or zinc carboxylate catalyst provides water repellency and stain resistance to substrates, particularly woven and non-woven textile and leather substrates.. . ... Wacker Chemie Ag

05/04/17 / #20170120210

Reactor and process for preparing granular polysilicon

A reactor for preparing granular polysilicon by deposition of polycrystalline silicon on silicon seed particles has a reaction vessel, an inner reactor tube for a fluidized bed comprising granular polysilicon and a reactor bottom within the reactor vessel, a heating device for heating the fluidized bed in the inner reactor tube, at least one bottom gas nozzle for introduction of fluidizing gas and at least one reaction gas nozzle for introduction of reaction gas, a feed device to introduce silicon seed particles, an offtake line for granular polysilicon, and a device for discharging reactor offgas from the reactor vessel, and has a cylindrical component which has openings on its cylindrical surface, with at least 5% and not more than 95% of the cylindrical surface being open located between the inner reactor tube and the heating device.. . ... Wacker Chemie Ag

04/27/17 / #20170113228

Silicon seed particles for the production of polycrystalline silicon granules in a fluidized bed reactor

Silicon seed particles which can be used for producing polycrystalline silicon granules in a fluidized-bed reactor are prepared by a process wherein a milling gas stream is introduced into a chamber containing polycrystalline silicon granules, as a result of which individual particles of the polycrystalline silicon granules are accelerated in such a manner that they collide with other particles of the polycrystalline silicon granules, and in this manner the polycrystalline silicon granules are comminuted, wherein the milling gas stream is introduced into the chamber by at least one jet nozzle made of hard metal.. . ... Wacker Chemie Ag

04/20/17 / #20170107394

Aqueous vinyl acetate ethylene copolymer dispersion for paper coating

The invention relates to a polymer dispersion for paper coating compositions obtainable by means of a radically initiated, aqueous emulsion polymerization of a) 60 to 97% by weight of vinyl acetate, b) 2 to 30% by weight of ethylene, c) 0.5 to 5% by weight of at least one ethylenically unsaturated silane monomer, d) 0.5 to 5% by weight of at least one ethylenically unsaturated carboxylic acid, based in each case on the total weight of the monomers used for the polymerization, and the data in % by weight summing in each case to 100% by weight, in the presence of one or more polymeric emulsifiers.. . ... Wacker Chemie Ag

04/13/17 / #20170101424

Process for hydrosilylation with addition of organic salts

Hydrosilylation of aliphatically unsaturated compounds (b) with compounds (a) bearing silicon-bonded hydrogen using a metal-containing hydrosilylation catalyst proceeds with higher yields and reduced quantities of byproducts when conducted in the presence of organic salts containing an inorganic or organic anion [y]− and a heteroatom-containing cation [a]+ in amounts of 0.01 mole % to 10 mole % based on the limiting amount of (a) or (b) in moles present in the reaction.. . ... Wacker Chemie Ag

03/16/17 / #20170073527

Hydrophobing agent for coatings

Weathering-resistance and hydrophobicity of paints and coatings are enhanced by addition of a composition comprising an organopolysiloxanes bearing pendent aminoalkyl groups and fatty acid ester-based epoxy group-containing compounds.. . ... Wacker Chemie Ag

03/16/17 / #20170073472

Addition cross-linking silicone composition with a high water-absorption capacity

Reversibly water-absorbtive silicone rubbers are prepared from addition cross-likable organopolysiloxanes by means of a hydrosilylation catalyst, and initially contain anhydrous sodium sulfate, anhydrous magnesium sulfate, or a mixture thereof. The silicone rubbers are capable of absorbing large amounts of water.. ... Wacker Chemie Ag

03/02/17 / #20170062827

Polymer compositions as a binder system for lithium-ion batteries

The invention relates to a polymer composition p containing: 100 parts-by-weight of polymer 1, which polymer is at least 50 g/l water-soluble at 25° c. And 1 bar, and can be produced via radical-initiated polymerisation of more than 95 wt. ... Wacker Chemie Ag

03/02/17 / #20170057830

Process for producing polycrystalline silicon

Polycrystalline silicon chunks are packed for further processing and/or for shipment with minimal contamination by introducing the chunks into a cardboard container lined with a non-contaminating plastic. The process is economical, avoids the problems associated with packaging in plastic bags, and provides far less contamination and spillage during transport.. ... Wacker Chemie Ag

02/16/17 / #20170044410

Cross-linkable masses based on organyl-oxysilane-terminated polymers

Rtv-1 compositions, despite containing conventional alkoxysilyl-terminated polymers, exhibit rapid cure and excellent physical properties when they further contain silicone resins, and employ metal, amidine, or guanidine curing catalysts c1 and amine-containing cocatalysts c2 in specific mole ratios.. . ... Wacker Chemie Ag

02/16/17 / #20170044370

Cross-linkable mixtures having alpha-functional polysiloxanes

Vulcanizates produced by crosslinking of mixtures including alpha-functional polysiloxanes have high relative permittivities at high electric breakdown strengths which renders them suitable as a dielectric material for applications in actuators, generators or sensors in robotics, orthopedics, electrically controllable “artificial muscles,” and transducers producing electricity from kinetic energy.. . ... Wacker Chemie Ag

02/09/17 / #20170037251

Surface-modified particulate metal oxides

Modified silica having a fraction of at least 15% t1 groups, or a greater fraction of t1 groups as compared to t3 groups, and an extractable content of less than 15 weight percent have a high proportion of surface modifying groups, and exhibit high thickening power in liquid media.. . ... Wacker Chemie Ag

02/09/17 / #20170036988

Process for ruthenium-catalyzed transvinylation of carboxylic acids

The invention relates to a process for transvinylation of a carboxylic acid feedstock with a vinyl ester feedstock to obtain a vinyl ester product and the corresponding acid of the vinyl ester feedstock in the presence of one or more ruthenium catalysts, wherein a) the vinyl ester feedstock, the carboxylic acid feedstock and a ruthenium catalyst are fed to the reactor, and b) the transvinylation reaction is carried out, characterized in that a carbonyl-free ru(iii) carboxylate is used as the ruthenium catalyst and in that no carbon monoxide is supplied, c) the reaction is carried out at a temperature of 110 to 170° c., d) upon completion of the transvinylation reaction, the vinyl ester feedstock and the corresponding acid are separated from the reaction mixture by distillation, e) the vinyl ester product is separated by distillation from the bottom product of the distillation, and f) the remaining reaction mixture is recycled into the reactor.. . ... Wacker Chemie Ag

01/26/17 / #20170022320

Lactide polymerisation

The present invention relates to a compound having the formula lam(or1)br2cxd wherein m is a metal selected from ti, zr and hf; l is a ligand selected from permethylpentalene, (hydro)permethyl-pentalene, (hydro)pentalene, cyclopentadiene, indene and ethylene- or silane-bridged indene, preferably (bis)indene; r1 is a 1-6c alkyl, substituted or unsubstituted phenyl, or a substituted or unsubstituted phenylalkylene group; r2 is me or et; x is halogen; a=1 to 3, b=1 to 3, c=0 or 1 and d=0, 1, 2 or 3; and dimers thereof, the use of the compound as an initiator in the polymerisation of lactide monomer and a process for producing a polylactide performed by contacting a lactide monomer with the compound.. . ... Wacker Chemie Ag

01/26/17 / #20170022141

Process for cleaning carbon dioxide-containing process gases from the preparation of vinyl acetate

The invention provides processes for cleaning carbon dioxide-containing process gases from the preparation of vinyl acetate after reaction of ethylene with acetic acid and oxygen in heterogeneously catalyzed, continuous gas phase processes, characterized in that carbon dioxide-containing process gases, for removal of carbon dioxide, are contacted with one or more scrubbing solutions, and one or more scrubbing solutions comprise one or more oxides of metals (metal oxides) selected from the group comprising vanadium, niobium, tantalum, chromium, molybdenum, manganese and arsenic.. . ... Wacker Chemie Ag

01/12/17 / #20170009020

Polysiloxanes comprising methylene-bonded polar groups

Organopolysiloxanes containing a large proportion of methylene-bonded polar groups have high relative permittivities, and are especially useful as thermally stable dielectrics. A methoxymethyl alkoxysilane starting material is easily synthesized, and can be incorporated into the polymers by conventional methods known in organosilicon chemistry.. ... Wacker Chemie Ag

01/12/17 / #20170008210

Method for producing silicone multi-layer composites

Multilayer silicone composites with precise thickness are produced by sequential extrusion of curable silicone films, and partially but not fully crosslinking a preceding silicone film prior to extruding a next subsequent film.. . ... Wacker Chemie Ag

01/05/17 / #20170001869

Method for producing polycrystalline silicon

The native oxide layer on silicon support rods in the siemens polysilicon production process is removed by heating the rods to a temperature of 1100-1200° c. And contacting the rods with hydrogen at a system pressure of 1.1e5 to 6e6 pa. ... Wacker Chemie Ag

01/05/17 / #20170001868

Method for producing polycrystalline silicon

Production of highly pure comminuted polycrystalline silicon from polycrystalline silicon rods produced by the siemens process is facilitated by removal of graphite residues from the electrode ends of the rods by removing the contaminated end portions by means of mechanical impulses.. . ... Wacker Chemie Ag








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