Patents by Inventor Zsolt Szentivanyi
Zsolt Szentivanyi 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: 7977431Abstract: The present invention relates to dithiocarbamic esters, their preparation and their use for regulating the degree of polymerization during the polymerization of monomers, such as during the polymerization of chloroprene to give polychloroprene, and during the polymerization of 2,3-dichlorobutadiene to give poly-2,3-dichlorobutadiene, and during the copolymerization of chloroprene with 2,3-dichlorobutadiene. The present invention further relates to polymers which are obtainable via the polymerization of monomers in the presence of the dithiocarbamic esters of the invention. The present invention also relates to polymers which contain end groups derived from the dithiocarbamic esters of the present invention.Type: GrantFiled: September 23, 2010Date of Patent: July 12, 2011Assignee: LANXESS Deutschland GmbHInventors: Dirk Achten, Michael Klimpel, Emilie Barriau, Lothar Reif, Renke Mottweiler, Heinrich Berg, Zsolt Szentivanyi, Stefan Glander
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Patent number: 7951875Abstract: The present invention relates to hydrogenated nitrile rubber polymers having lower molecular weights and narrower molecular weight distributions than those known in the art.Type: GrantFiled: June 1, 2010Date of Patent: May 31, 2011Assignee: LANXESS Inc.Inventors: Frederic Guerin, Sharon X. Guo, Zsolt Szentivanyi, Stephan Glander
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Patent number: 7919563Abstract: The present invention relates to the process for preparing hydrogenated nitrile rubber polymers having lower molecular weights and narrower molecular weight distributions than those known in the art.Type: GrantFiled: June 1, 2010Date of Patent: April 5, 2011Assignee: Lanxess Inc.Inventors: Frederic Guerin, Sharon X. Guo, Zsolt Szentivanyi, Stephan Glander
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Publication number: 20110015360Abstract: The present invention relates to dithiocarbamic esters, their preparation and their use for regulating the degree of polymerization during the polymerization of monomers, such as during the polymerization of chloroprene to give polychloroprene, and during the polymerization of 2,3-dichlorobutadiene to give poly-2,3-dichlorobutadiene, and during the copolymerization of chloroprene with 2,3-dichlorobutadiene. The present invention further relates to polymers which are obtainable via the polymerization of monomers in the presence of the dithiocarbamic esters of the invention. The present invention also relates to polymers which contain end groups derived from the dithiocarbamic esters of the present invention.Type: ApplicationFiled: September 23, 2010Publication date: January 20, 2011Applicant: LANXESS DEUTSCHLAND GMBHInventors: Dirk Achten, Michael Klimpel, Emilie Barriau, Lothar Reif, Renke Mottweiler, Heinrich Berg, Zsolt Szentivanyi, Stefan Glander
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Patent number: 7825193Abstract: The present invention relates to dithiocarbamic esters, their preparation and their use for regulating the degree of polymerization during the polymerization of monomers, such as during the polymerization of chloroprene to give polychloroprene, and during the polymerization of 2,3-dichlorobutadiene to give poly-2,3-dichlorobutadiene, and during the copolymerization of chloroprene with 2,3-dichlorobutadiene. The present invention further relates to polymers which are obtainable via the polymerization of monomers in the presence of the dithiocarbamic esters of the invention. The present invention also relates to polymers which contain end groups derived from the dithiocarbamic esters of the present invention.Type: GrantFiled: December 1, 2006Date of Patent: November 2, 2010Assignee: LANXESS Deutschland GmbHInventors: Dirk Achten, Michael Klimpel, Emilie Barriau, Lothar Reif, Renke Mottweiler, Heinrich Berg, Zsolt Szentivanyi, Ste{acute over (f)}an Glander
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Publication number: 20100240848Abstract: The present invention relates to the process for preparing hydrogenated nitrile rubber polymers having lower molecular weights and narrower molecular weight distributions than those known in the art.Type: ApplicationFiled: June 1, 2010Publication date: September 23, 2010Applicant: LANXESS DEUTSCHLAND GMBHInventors: Frédéric Guérin, Sharon X. Guo, Zsolt Szentivanyi, Stephan Glander
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Publication number: 20100240838Abstract: The present invention relates to hydrogenated nitrile rubber polymers having lower molecular weights and narrower molecular weight distributions than those known in the art.Type: ApplicationFiled: June 1, 2010Publication date: September 23, 2010Applicant: LANXESS DEUTSCHLAND GMBHInventors: Frédéric Guérin, Sharon X. Guo, Zsolt Szentivanyi, Stephan Glander
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Publication number: 20070078229Abstract: The present invention relates to dithiocarbamic esters, their preparation and their use for regulating the degree of polymerization during the polymerization of monomers, such as during the polymerization of chloroprene to give polychloroprene, and during the polymerization of 2,3-dichlorobutadiene to give poly-2,3-dichlorobutadiene, and during the copolymerization of chloroprene with 2,3-dichlorobutadiene. The present invention further relates to polymers which are obtainable via the polymerization of monomers in the presence of the dithiocarbamic esters of the invention. The present invention also relates to polymers which contain end groups derived from the dithiocarbamic esters of the present invention.Type: ApplicationFiled: December 1, 2006Publication date: April 5, 2007Inventors: Dirk Achten, Michael Klimpel, Emilie Barriau, Lothar Reif, Renke Mottweiler, Heinrich Berg, Zsolt Szentivanyi, Stefan Glander
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Patent number: 7169937Abstract: The present invention relates to dithiocarbamic esters, their preparation and their use for regulating the degree of polymerization during the polymerization of monomers, such as during the polymerization of chloroprene to give polychloroprene, and during the polymerization of 2,3-dichlorobutadiene to give poly-2,3-dichlorobutadiene, and during the copolymerization of chloroprene with 2,3-dichlorobutadiene. The present invention further relates to polymers which are obtainable via the polymerization of monomers in the presence of the dithiocarbamic esters of the invention. The present invention also relates to polymers which contain end groups derived from the dithiocarbamic esters of the present invention.Type: GrantFiled: September 15, 2003Date of Patent: January 30, 2007Assignee: Bayer AktiengesellschaftInventors: Dirk Achten, Michael Klimpel, Emilie Barriau, Lothar Reif, Renke Mottweiler, Heinrich Berg, Zsolt Szentivanyi, Stefan Glander
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Patent number: 7071292Abstract: The present invention relates to a method for the preparation of purified elastomers prepared by emulsion polymerization, wherein the level of impurity is reduced by up to 99 wt. %, expressed in terms of the unpurified elastomer. The present invention also relates to elastomers which can be obtained by the method according to the present invention, to the use of the elastomers for the production of all types of products, and to the product which is produced by processing the elastomer which can be obtained by the method according to the present invention.Type: GrantFiled: October 12, 2004Date of Patent: July 4, 2006Assignee: Bayer AktiengesellschaftInventors: Dirk Achten, Rafael Warsitz, Gregor Dudziak, Franz-Josef Mersmann, Stephen Pask, Zsolt Szentivanyi
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Publication number: 20050197486Abstract: The present invention relates to a method for the preparation of purified elastomers prepared by emulsion polymerization, wherein the level of impurity is reduced by up to 99 wt. %, expressed in terms of the unpurified elastomer. The present invention also relates to elastomers which can be obtained by the method according to the present invention, to the use of the elastomers for the production of all types of products, and to the product which is produced by processing the elastomer which can be obtained by the method according to the present invention.Type: ApplicationFiled: October 12, 2004Publication date: September 8, 2005Inventors: Dirk Achten, Rafael Warsitz, Gregor Dudziak, Franz-Josef Mersmann, Stephen Pask, Zsolt Szentivanyi
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Publication number: 20040236029Abstract: The present invention relates to hydrogenated nitrile rubber polymers having lower molecular weights and narrower molecular weight distributions than those known in the art. The present invention is also related to shaped articles containing hydrogenated nitrile rubber polymers having lower molecular weights and narrower molecular weight distributions than those known in the art.Type: ApplicationFiled: June 28, 2004Publication date: November 25, 2004Inventors: Frederic Guerin, Sharon X. Guo, Zsolt Szentivanyi, Stephan Glander
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Patent number: 6780939Abstract: The present invention relates to hydrogenated nitrile rubber polymers having lower molecular weights and narrower molecular weight distributions than those known in the art. The present invention is also related to shaped articles containing hydrogenated nitrile rubber polymers having lower molecular weights and narrower molecular weight distributions than those known in the art.Type: GrantFiled: June 10, 2002Date of Patent: August 24, 2004Assignee: Bayer Inc.Inventors: Frédéric Guérin, Sharon X. Guo, Zsolt Szentivanyi, Stephan Glander
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Publication number: 20040110964Abstract: The present invention relates to dithiocarbamic esters, their preparation and their use for regulating the degree of polymerization during the polymerization of monomers, such as during the polymerization of chloroprene to give polychloroprene, and during the polymerization of 2,3-dichlorobutadiene to give poly-2,3-dichlorobutadiene, and during the copolymerization of chloroprene with 2,3-dichlorobutadiene. The present invention further relates to polymers which are obtainable via the polymerization of monomers in the presence of the dithiocarbamic esters of the invention. The present invention also relates to polymers which contain end groups derived from the dithiocarbamic esters of the present invention.Type: ApplicationFiled: September 15, 2003Publication date: June 10, 2004Inventors: Dirk Achten, Michael Klimpel, Emilie Barriau, Lothar Reif, Renke Mottweiler, Heinrich Berg, Zsolt Szentivanyi, Stefan Glander
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Publication number: 20030088035Abstract: The present invention relates to hydrogenated nitrile rubber polymers having lower molecular weights and narrower molecular weight distributions than those known in the art. The present invention is also related to shaped articles containing hydrogenated nitrile rubber polymers having lower molecular weights and narrower molecular weight distributions than those known in the art.Type: ApplicationFiled: June 10, 2002Publication date: May 8, 2003Inventors: Frederic Guerin, Sharon X. Guo, Zsolt Szentivanyi, Stephan Glander
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Patent number: 5013783Abstract: Hydrogenated nitrile rubbers filled with sodium aluminium silicate suffer relatively little deterioration of the mechanical properties, e.g. elongation at break, during hot air aging.Type: GrantFiled: June 11, 1990Date of Patent: May 7, 1991Assignee: Bayer AktiengesellschaftInventors: Joachim Thormer, Ernst Rohde, Zsolt Szentivanyi
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Patent number: 4963621Abstract: Rubber mixtures of hydrogenated nitrile rubber and ethylene/acrylonitrile copolymers, which contain copolymerized units of compounds with at least two (meth-)acryloyl groups, are easy to process and give vulcanized materials of high solvent resistance without any deterioration in the mechanical properties.Type: GrantFiled: February 5, 1990Date of Patent: October 16, 1990Assignee: Bayer AktiengesellschaftInventors: Zsolt Szentivanyi, Werner Obrecht, Jurgen Wassen
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Patent number: 4897436Abstract: Products prepared by reacting isopropenyl phenols or bisphenols of the bisphenol-A type with diphenyl amine, phenothiazin or derivatives thereof in the presence of acidic catalysts are used as stabilizers for polyamides and rubbery materials.Type: GrantFiled: January 11, 1988Date of Patent: January 30, 1990Assignee: Bayer AktiengesellschaftInventors: Hans-Josef Buysch, Zsolt Szentivanyi, Bert Brassat, Christiane Oppenheimer-Stix
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Patent number: 4829128Abstract: Statistical copolymers of from 85 to 52% by weight of a conjugated diene, from 15 to 48% by weight of at least one unsaturated nitrile and from 0 to 10% by weight of further monomers, copolymerizable with diene and nitrile, which have a molecular weight M.sub.n of from 0.5 to 30 kg/mol and a degree of hydrogenation of the double bonds of greater than 80%, give nitrile rubbers, which are mixed and colvulcanized with these copolymers, an increased ozone resistance.Type: GrantFiled: October 24, 1986Date of Patent: May 9, 1989Assignee: Bayer AktiengesellschaftInventors: Hartmuth Buding, Zsolt Szentivanyi, Joachim Thormer
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Patent number: 4826721Abstract: This invention relates to fabric or cord coated as an individual filament or as the finished carrier material with hydrogenated nitrile rubber and the laminated materials prepared therefrom with the vulcanized rubber. It, furthermore, relates to a latex of said hydrogenated nitrile rubber.Type: GrantFiled: May 26, 1987Date of Patent: May 2, 1989Assignee: Bayer AktiengesellschaftInventors: Werner Obrecht, John Goossens, Jean Mirza, Jurgen Pabst, Joachim Thormer, Zsolt Szentivanyi