Patents by Inventor Gilbert Geisberger
Gilbert Geisberger 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: 9150703Abstract: Siloxanes having terminal hydroxy groups, and which have a content of cyclic siloxanes of not more than 5% by weight, are stabilized by addition of ammonia in gaseous form or as a solution in a protic or aprotic solvent or in the form of an ammonia-releasing compound in amounts of at least 0.01 ppm by weight and not more than 100 ppm by weight, calculated as ammonia and based on the total weight of the siloxanes having terminal hydroxy groups. Ammonia in gaseous form is preferably used.Type: GrantFiled: July 18, 2014Date of Patent: October 6, 2015Assignee: Wacker Chemie AGInventors: Agnes Baskakov, Gilbert Geisberger, Michaela Tanzer
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Publication number: 20150025189Abstract: Siloxanes having terminal hydroxy groups, and which have a content of cyclic siloxanes of not more than 5% by weight, are stabilized by addition of ammonia in gaseous form or as a solution in a protic or aprotic solvent or in the form of an ammonia-releasing compound in amounts of at least 0.01 ppm by weight and not more than 100 ppm by weight, calculated as ammonia and based on the total weight of the siloxanes having terminal hydroxy groups. Ammonia in gaseous form is preferably used.Type: ApplicationFiled: July 18, 2014Publication date: January 22, 2015Inventors: Agnes BASKAKOV, Gilbert GEISBERGER, Michaela TANZER
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Patent number: 8546596Abstract: Compounds containing carbon-carbon double bonds and/or carbon-carbon triple bonds are hydrosilylated with linear organopolysiloxanes having diorganosiloxy units and Si—H groups, produced by reacting diorganodichlorosilanes and monochlorosilanes and optionally dichlorosilanes with water in a first step, where at least one of the monochlorosilanes or dichlorosilanes contain Si—H groups to give a partial hydrolysate and gaseous hydrogen chloride, and in a second step, treating the partial hydrolysate with water to remove SiCl groups still present to form hydrochloric acid, and producing a hydrolysate containing the organopolysiloxanes.Type: GrantFiled: June 17, 2009Date of Patent: October 1, 2013Assignee: Wacker Chemie AGInventor: Gilbert Geisberger
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Patent number: 7939618Abstract: Organopolysiloxanes having aminoalkyl groups are prepared by (i) reacting (A) linear, cyclic or branched organopolysiloxanes with (B) aminoalkylsilanes which have an SiC-bonded, basic nitrogen-containing hydrocarbon radical and 2 or 3 hydrolyzable groups, or the partial or complete hydrolysis products thereof, optionally in the presence of (C) basic catalysts and/or (D) chain-terminating reagents, and (ii) optionally, after the reaction (i) neutralizing the optionally used basic catalysts (c), with the proviso that compounds (A), (B) and, when used, (D) are reacted continuously in a reaction space whose ratio of length to diameter is equal to or greater than four.Type: GrantFiled: April 29, 2008Date of Patent: May 10, 2011Assignee: Wacker Chemie AGInventors: Daniel Schildbach, Johann Bindl, Gilbert Geisberger
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Patent number: 7759446Abstract: Organopolysiloxanes having aminoalkyl groups are prepared by (i) reacting (A) linear, cyclic or branched organopolysiloxanes with (B) aminoalkyl silanes having an SiC-bonded hydrocarbon radical comprising basic nitrogen and 2 or 3 hydrolyzable groups, or partial or full hydrolyzates thereof, in the presence of (C) basic catalysts and optionally (D) chain-terminating reagents, at a temperature of at least 60° C., then, after the reaction (i), (ii) deactivating the catalysts (C) and (iii) cooling the product to a temperature below 60° C. before, during or after the deactivation (ii) of the catalysts, with the proviso that the process is performed in at least two successive stirred tanks, the reaction (i) and the cooling (iii) proceeding separately in different stirred tanks.Type: GrantFiled: July 28, 2008Date of Patent: July 20, 2010Assignee: Wacker Chemie AGInventors: Gilbert Geisberger, Daniel Schildbach
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Patent number: 7655811Abstract: Hydroxyl-terminal organopolysiloxanes having diorganosiloxy groups and Si—H groups are prepared by reacting the appropriate chlorosilanes with less than 0.5 mol water per mol of hydrolyzable chlorine in a first step and recovering gaseous HCl, and more fully hydrolyzing with additional water in a second step.Type: GrantFiled: September 29, 2006Date of Patent: February 2, 2010Assignee: Wacker Chemie AGInventors: Gilbert Geisberger, Christian Herzig, Tassilo Lindner
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Publication number: 20090318724Abstract: Compounds containing carbon-carbon double bonds and/or carbon-carbon triple bonds are hydrosilylated with linear organopolysiloxanes having diorganosiloxy units and Si—H groups, produced by reacting diorganodichlorosilanes and monochlorosilanes and optionally dichlorosilanes with water in a first step, where at least one of the monochlorosilanes or dichlorosilanes contain Si—H groups to give a partial hydrolysate and gaseous hydrogen chloride, and in a second step, treating the partial hydrolysate with water to remove SiCl groups still present to form hydrochloric acid, and producing a hydrolysate containing the organopolysiloxanes.Type: ApplicationFiled: June 17, 2009Publication date: December 24, 2009Applicant: WACKER CHEMIE AGInventor: Gilbert Geisberger
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Patent number: 7605283Abstract: Silanes of the general formula (1) RaSiHbX4-b-a??(1) are prepared by disproportionating at least one more highly chlorinated silane in the presence of a homogeneous catalyst in an apparatus with at least one reactive distillation column and at least one additional reactor selected from among prereactors and side reactors, where R is an alkyl, aryl, alkaryl or haloalkyl radical, X is a halogen atom, a is 0 or 1, and b is 2, 3 or 4.Type: GrantFiled: June 11, 2008Date of Patent: October 20, 2009Assignee: Wacker Chemie AGInventors: Gilbert Geisberger, Wolfgang Wewers
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Patent number: 7511166Abstract: Organylhydrogensilanes are prepared by means of a comproportionation reaction according to the equation Z RaSiCl4?a+SiHbCl4?b?Z RaSiHCl3?a+SiHb?yCl4?b+y, in the presence of a catalyst which contains at least one completely organically substituted ammonium or phosphonium unit, where R is an optionally halogen-substituted alkyl, aryl, or alkaryl radical, a is 1, 2 or 3, y and Z are 1, 2, 3 or 4 and b is 2, 3 or 4.Type: GrantFiled: April 25, 2006Date of Patent: March 31, 2009Assignee: Wacker Chemie AGInventor: Gilbert Geisberger
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Publication number: 20090036618Abstract: Organopolysiloxanes having aminoalkyl groups are prepared by (i) reacting (A) linear, cyclic or branched organopolysiloxanes with (B) aminoalkyl silanes having an SiC-bonded hydrocarbon radical comprising basic nitrogen and 2 or 3 hydrolyzable groups, or partial or full hydrolyzates thereof, in the presence of (C) basic catalysts and optionally (D) chain-terminating reagents, at a temperature of at least 60° C., then, after the reaction (i), (ii) deactivating the catalysts (C) and (iii) cooling the product to a temperature below 60° C. before, during or after the deactivation (ii) of the catalysts, with the proviso that the process is performed in at least two successive stirred tanks, the reaction (i) and the cooling (iii) proceeding separately in different stirred tanks.Type: ApplicationFiled: October 6, 2008Publication date: February 5, 2009Applicant: Wacker Chemie AGInventors: Gilbert Geisberger, Daniel Schildbach
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Publication number: 20080319214Abstract: Silanes of the general formula (1) RaSiHbX4-b-a ??(1) are prepared by disproportionating at least one more highly chlorinated silane in the presence of a homogeneous catalyst in an apparatus with at least one reactive distillation column and at least one additional reactor selected from among prereactors and side reactors, where R is an alkyl, aryl, alkaryl or haloalkyl radical, X is a halogen atom, a is 0 or 1, and b is 2, 3 or 4.Type: ApplicationFiled: June 11, 2008Publication date: December 25, 2008Applicant: WACKER CHEMIE AGInventors: Gilbert Geisberger, Wolfgang Wewers
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Publication number: 20080287699Abstract: Compounds containing unsaturated carbon-carbon bonds are hydrosilylated with H-silanes or H-siloxanes in the presence of a noble metal catalyst, wherein the water content of the reaction mixture is less than 500 ppm and the noble metal catalyst is supplied as a liquid, and is present in an amount of not more than 50 ppm.Type: ApplicationFiled: October 13, 2006Publication date: November 20, 2008Applicant: WACKER CHEMIE AGInventors: Gilbert Geisberger, Frank Baumann
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Publication number: 20080275194Abstract: Organopolysiloxanes having aminoalkyl groups are prepared by (i) reacting (A) linear, cyclic or branched organopolysiloxanes with (B) aminoalkylsilanes which have an SiC-bonded, basic nitrogen-containing hydrocarbon radical and 2 or 3 hydrolyzable groups, ?or the partial or complete hydrolysis products thereof, optionally in the presence of (C) basic catalysts and/or (D) chain-terminating reagents, and (ii) optionally, after the reaction (i) neutralizing the optionally used basic catalysts (c), with the proviso that compounds (A), (B) and, when used, (D) are reacted continuously in a reaction space whose ratio of length to diameter is equal to or greater than four.Type: ApplicationFiled: April 29, 2008Publication date: November 6, 2008Applicant: WACKER CHEMIE AGInventors: Daniel Schildbach, Johann Bindl, Gilbert Geisberger
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Publication number: 20080269453Abstract: Hydroxyl-terminal organopolysiloxanes having diorganylsiloxy [diorganosiloxy ??] groups and Si—H groups are prepared by reacting the appropriate chlorosilanes with less than 0.5 mol water per mol of hydrolyzable chlorine in a first step and recovering gaseous HCl, and more fully hydrolyzing with additional water in a second step.Type: ApplicationFiled: September 29, 2006Publication date: October 30, 2008Applicant: WACKER CHEMIE AGInventors: Gilbert Geisberger, Christian Herzig, Tassilo Lindner
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Publication number: 20080227930Abstract: Vinyl-terminated organopolysiloxanes also having pendant allyl functionality exhibit high cure rates with low extractables, while exhibiting superior release properties when compared to higher alkenyl functionality.Type: ApplicationFiled: May 4, 2006Publication date: September 18, 2008Applicant: WACKER CHEMIE AGInventors: Hans Lautenschlager, Gilbert Geisberger
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Patent number: 7396894Abstract: The invention provides a process for preparing linear organopolysiloxanes (P) having diorganosiloxy units and Si—H groups, in which, in a first step, diorganodichlorosilanes (A) and monochlorosilanes (B) and optionally dichlorosilanes (C), at least one of the monochlorosilanes (B) or dichlorosilanes (C) containing Si—H groups, are reacted with at most 0.5 mol of water per mole of hydrolyzable chlorine to give a partial hydrolyzate (T) and gaseous hydrogen chloride, and, in a second step, the SiCl groups still present in the partial hydrolyzate (T) are removed by treating with water to form hydrochloric acid, and a hydrolyzate (H) containing the organopolysiloxanes (P) is obtained.Type: GrantFiled: April 19, 2005Date of Patent: July 8, 2008Assignee: Wacker Chemie AGInventors: Gilbert Geisberger, Tassilo Lindner, Frank Baumann
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Publication number: 20080045737Abstract: The invention relates to a process for the continuous preparation of organosilanes in a reactive distillation column, wherein a homogenous hydrosilylation catalyst is introduced into the column.Type: ApplicationFiled: August 20, 2007Publication date: February 21, 2008Applicant: WACKER CHEMIE AGInventors: Gilbert Geisberger, Marco Auer, Armin Groessmann
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Publication number: 20070208132Abstract: The invention relates to crosslinkable compositions (V) containing (A) linear organopolysiloxanes (A) having alkenyl groups, (B) linear organopolysiloxanes (B) which have diorganosilyloxy units and Si—H groups and are obtainable by a cohydrolysis process in which diorganodichlorosilanes and monochlorosilanes and optionally dichlorosilanes, at least the monochlorosilanes or dichlorosilanes containing Si—H groups, are hydrolyzed with water, and (C) catalysts (C) promoting the addition of Si—H groups at an aliphatic carbon-carbon double bond.Type: ApplicationFiled: February 22, 2007Publication date: September 6, 2007Applicant: WACKER CHEMIE AGInventors: Gilbert Geisberger, Hans Lautenschlager
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Patent number: 7145028Abstract: Continuous hydrosilylation of compounds (A) bearing C—C multiple bonds by means of silicon compounds (B) having Si—H groups, in which the reaction components (A) and (B) are reacted continuously in an integrated loop-tube reactor, with reaction mixture being conveyed from the tube into the loop and back again so that a section of the tube is part of the loop circuit, provides a highly controllable reaction process with high product yields.Type: GrantFiled: November 29, 2005Date of Patent: December 5, 2006Assignee: Wacker Chemie AGInventors: Gilbert Geisberger, Frank Baumann, Andreas Daniels
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Publication number: 20060241272Abstract: Organylhydrogensilanes are prepared by means of a comproportionation reaction according to the equation Z RaSiCl4?a+SiHbCl4?b?Z RaSiHCl3?a+SiHb?yCl4?b+y, in the presence of a catalyst which contains at least one completely organically substituted ammonium or phosphonium unit, where R is an optionally halogen-substituted alkyl, aryl, or alkaryl radical, a is 1, 2 or 3, y and Z are 1, 2, 3 or 4 and b is 2, 3 or 4.Type: ApplicationFiled: April 25, 2006Publication date: October 26, 2006Applicant: Wacker Chemie AGInventor: Gilbert Geisberger