Patents by Inventor Stefan Killat
Stefan Killat has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 9815977Abstract: The invention provides a process for preparing dispersion powders by spray drying of aqueous polymer dispersions of polymers of one or more ethylenically unsaturated monomers selected from the group encompassing vinyl esters, methacrylic esters, acrylic esters, olefins, dienes, vinylaromatics, and vinyl halides with a drying gas in a nozzle atomization dryer, characterized in that the aqueous polymer dispersion (feed), before being atomized, is preheated under pressure to a temperature of 100° C. to 200° C. and is atomized at this temperature, the pressure being set such that the aqueous phase of the polymer dispersion does not boil at the temperature selected.Type: GrantFiled: March 25, 2014Date of Patent: November 14, 2017Assignee: WACKER CHEMIE AGInventor: Stefan Killat
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Publication number: 20160060448Abstract: The invention provides a process for preparing dispersion powders by spray drying of aqueous polymer dispersions of polymers of one or more ethylenically unsaturated monomers selected from the group encompassing vinyl esters, methacrylic esters, acrylic esters, olefins, dienes, vinylaromatics, and vinyl halides with a drying gas in a nozzle atomization dryer, characterized in that the aqueous polymer dispersion (feed), before being atomized, is preheated under pressure to a temperature of 100° C. to 200° C. and is atomized at this temperature, the pressure being set such that the aqueous phase of the polymer dispersion does not boil at the temperature selected.Type: ApplicationFiled: March 25, 2014Publication date: March 3, 2016Inventor: Stefan KILLAT
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Patent number: 9051440Abstract: A process for producing dispersible powders by spray-drying aqueous polymer dispersions and adding antiblocking agent, wherein antiblocking agents present in agglomerated form and having a particle size from 10 ?m to 250 ?m, or having a particle size from 5 mm to 5 cm in the case of agglomerates in the form of extrudates, are fed in whole or in part by a transport gas into the spray-drying device and are comminuted to a particle size from 0.01 ?m to 5 ?m, or, in the case of extrudates, to a particle size from 2 ?m to 60 ?m.Type: GrantFiled: July 23, 2012Date of Patent: June 9, 2015Assignee: WACKER CHEMIE AGInventors: Michael Herbert, Jochen Ring, Stefan Killat, Bernd Gerstenberger
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Patent number: 8984765Abstract: A process for producing dispersion powders by spray drying of aqueous polymer dispersions and addition of antiblocking agents in a rotary atomization dryer, wherein the antiblocking agent is conveyed by delivery air, wholly or partly, into an annular gap which is formed by a moulding arranged concentrically around the housing of the rotary atomizer, and which ends at a distance above the upper edge of the atomizer plate of the rotary atomizer.Type: GrantFiled: July 25, 2012Date of Patent: March 24, 2015Assignee: Wacker Chemie AGInventors: Michael Herbert, Jochen Ring, Stefan Killat, Bernd Gerstenberger
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Publication number: 20140237847Abstract: A process for producing dispersion powders by means of spray drying of aqueous polymer dispersions and addition of antiblocking agents in a rotary atomization dryer, wherein the antiblocking agent is conveyed by means of delivery air, wholly or partly, into an annular gap which is formed by a moulding arranged concentrically around the housing of the rotary atomizer, and which ends at a distance above the upper edge of the atomizer plate of the rotary atomizer.Type: ApplicationFiled: July 25, 2012Publication date: August 28, 2014Applicant: Wacker Chemle AGInventors: Michael Herbert, Jochen Ring, Stefan Killat, Bernd Gerstenberger
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Publication number: 20140167299Abstract: A process for producing dispersible powders by spray-drying aqueous polymer dispersions and adding antiblocking agent, wherein antiblocking agents present in agglomerated form and having a particle size from 10 ?m to 250 ?m, or having a particle size from 5 mm to 5 cm in the case of agglomerates in the form of extrudates, are fed in whole or in part by a transport gas into the spray-drying device and are comminuted to a particle size from 0.01 ?m to 5 ?m, or, in the case of extrudates, to a particle size from 2 ?m to 60 ?m.Type: ApplicationFiled: July 23, 2012Publication date: June 19, 2014Applicant: Wacker Chemie AGInventors: Michael Herbert, Jochen Ring, Stefan Killat, Bernd Gerstenberger
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Patent number: 8481648Abstract: Redispersible polymer powders which are cationically stabilized by spray drying a polymer dispersion with a cationic polymer can be used in higher concentrations in chemical building construction materials without introducing adverse properties.Type: GrantFiled: February 8, 2007Date of Patent: July 9, 2013Assignee: Wacker Chemie AGInventors: Andrea Schorm, Hans-Peter Weitzel, Stefan Killat, Hermann Lutz
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Patent number: 8470120Abstract: Water-redispersible polymer powder compositions are obtained by means of free-radical-initiated polymerization in aqueous medium of one or more monomers of vinyl esters of unbranched or branched alkylcarboxylic acids having from 1 to 15 carbon atoms, methacrylic esters and acrylic esters of alcohols having from 1 to 15 carbon atoms, vinylaromatics, olefins, dienes and vinyl halides and subsequent drying of the polymer dispersion, wherein one or more silanes of the general formula (RO)3?nR1nSiR2X (1) where X is an amino- or epoxy-containing radical are added before drying of the polymer dispersion. The powders are especially useful in tile adhesives for tiles having low water absorbtion capacity.Type: GrantFiled: October 13, 2006Date of Patent: June 25, 2013Assignee: Wacker Chemie AGInventors: Marion Killat, Stefan Killat
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Patent number: 7956113Abstract: Hydrophobicizing additives are water-redispersible powders or aqueous dispersions containing: a) water-insoluble, film-forming base polymer(s) based on homopolymers or copolymers of one or more vinyl esters of optionally branched C1-15 alkylcarboxylic, (meth)acrylic esters of C1-15 alcohols, vinylaromatics, olefins, dienes and vinyl halides, b) one or more hydrophobic organosilicon compounds, fatty acids, or derivatives thereof, or hydrocarbon waxes, and c) one or more protective colloids, wherein the proportion of the component b) based on the total weight of the component a) is more than 30% by weight.Type: GrantFiled: November 24, 2005Date of Patent: June 7, 2011Assignee: Wacker Chemie AGInventors: Stefan Killat, Peter Fritze
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Publication number: 20090030168Abstract: Redispersible polymer powders which are cationically stabilized by spray drying a polymer dispersion with a cationic polymer can be used in higher concentrations in chemical building construction materials without introducing adverse properties.Type: ApplicationFiled: February 8, 2007Publication date: January 29, 2009Applicant: WACKER POLYMER SYSTEMS GMBH & CO. KGInventors: Andrea Schorm, Hans-Peter Weitzel, Stefan Killat, Hermann Lutz
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Publication number: 20080271848Abstract: The invention relates to water-redispersible polymer powder compositions obtainable by means of free-radical-initiated polymerization in aqueous medium of one or more monomers from the group consisting of vinyl esters of unbranched or branched alkylcarboxylic acids having from 1 to 15 carbon atoms, methacrylic esters and acrylic esters of alcohols having from 1 to 15 carbon atoms, vinylaromatics, olefins, dienes and vinyl halides and subsequent drying of the polymer dispersion obtained, characterized in that one or more silanes of the general formula (RO)3-nR1nSiR2X (1) are added before or during the polymerization or before drying of the polymer dispersion, and also their use in tile adhesives.Type: ApplicationFiled: October 13, 2006Publication date: November 6, 2008Applicant: WACKER POLYMER SYSTEMS GMBH & CO. KGInventors: Marion Killat, Stefan Killat
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Patent number: 7388047Abstract: Water-redispersible polymer powder compositions based on homopolymers or copolymers of one or more monomers from the group consisting of vinyl esters of unbranched or branched alkylcarboxylic acids having from 1 to 15 carbon atoms, methacrylic esters and acrylic esters of alcohols having from 1 to 15 carbon atoms, vinylaromatics, olefins, dienes and vinyl halides, one or more protective colloids, if desired antiblocking agents, contain one or more compounds from the group of pozzolanas. The pozzolanic compounds preferably take the place of anti-blocking agents conventionally used.Type: GrantFiled: June 22, 2004Date of Patent: June 17, 2008Assignee: Wacker Polymer Systems GmbH & Co. KGInventors: Hans-Peter Weitzel, Hermann Lutz, Peter Fritze, Stefan Killat
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Publication number: 20080132624Abstract: Hydrophobicizing additives are water-redispersible powders or aqueous dispersions containing: a) water-insoluble, film-forming base polymer(s) based on homopolymers or copolymers of one or more vinyl esters of optionally branched C1-15 alkylcarboxylic, (meth)acrylic esters of C1-15 alcohols, vinylaromatics, olefins, dienes and vinyl halides, b) one or more hydrophobic organosilicon compounds, fatty acids, or derivatives thereof, or hydrocarbon waxes, and c) one or more protective colloids, wherein the proportion of the component b) based on the total weight of the component a) is more than 30% by weight.Type: ApplicationFiled: November 24, 2005Publication date: June 5, 2008Applicant: WACKER POLYMER SYSTEMS GMBH & CO. KGInventors: Stefan Killat, Peter Fritze
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Publication number: 20050014881Abstract: Water-redispersible polymer powder compositions based on homopolymers or copolymers of one or more monomers from the group consisting of vinyl esters of unbranched or branched alkylcarboxylic acids having from 1 to 15 carbon atoms, methacrylic esters and acrylic esters of alcohols having from 1 to 15 carbon atoms, vinylaromatics, olefins, dienes and vinyl halides, one or more protective colloids, if desired antiblocking agents, contain one or more compounds from the group of pozzolanas. The pozzolanic compounds preferably take the place of anti-blocking agents conventionally used.Type: ApplicationFiled: June 22, 2004Publication date: January 20, 2005Applicant: Wacker Polymer Systems GmbH & Co. KGInventors: Hans-Peter Weitzel, Hermann Lutz, Peter Fritze, Stefan Killat