Patents by Inventor Francois De Buyl
Francois De Buyl 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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Publication number: 20210324252Abstract: A method for producing an optical silicone assembly is disclosed. The method comprises the steps of: i) treating a surface of a substrate with an optically clear silicone adhesive composition; ii) placing the substrate obtained by step i) into a mold; iii-a) injecting an optically clear moldable silicone composition into the mold, and/or iii-b) overmolding the optically clear moldable silicone composition onto the substrate; and then iv) heating the optically clear moldable silicone composition to form the optical silicone assembly. The optical silicone assembly produced by the method of this disclosure is characterized by excellent adhesion of an optical silicone product to various types of substrates.Type: ApplicationFiled: September 10, 2019Publication date: October 21, 2021Inventors: Martijn BEUKEMA, Thierry COOREMANS, François DE BUYL, Kevin VAN TIGGELEN
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Publication number: 20200291187Abstract: A curable silicone composition comprising (A) an alkenyl-containing organopolysiloxane comprising (A-1) a dialkylpolysiloxane that has an average of at least two alkenyl groups in each molecule), and (A-2) an alkenyl-containing, resin-form organopolysiloxane that comprises the SiO4/2 unit, R12R2SiO1/2 unit, and R13SiO1/2 unit; (B) an organopolysiloxane that has an average of at least three silicon-bonded hydrogen atoms in each molecule, wherein component (B) is an organopolysiloxane comprising (B-1) an organopolysiloxane that contains at least 0.7 mass % silicon-bonded hydrogen and that comprises SiO4/2 units and HR32SiO1/2 units in a ratio ranging from 1.50 to 2.50 moles of HR32SiO1/2 units per 1 mole of SiO4/2 units, at 50 to 100 mass % of component (B), and (B-2) a straight-chain organopolysiloxane that contains at least 0.3 mass % silicon-bonded hydrogen, at 0 to 50 mass % of component (B); and (C) a hydrosilylation reaction catalyst.Type: ApplicationFiled: May 17, 2018Publication date: September 17, 2020Applicant: Dow Silicones CorporationInventors: Martijn A. Beukema, Stanton Dent, Pierre Descamps, Stuart Leadley, Joel McDonald, Kevin van Tiggelen, Michelle Cummings, Serge Creutz, Francois de Buyl
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Publication number: 20200231810Abstract: A room temperature curable composition is disclosed. The composition can be used as an encapsulation/potting material. The composition comprises: (i) at least one condensation curable silyl terminated polymer having at least one silicon bonded hydroxyl functional group per molecule; (ii) a cross-linker having at least two hydrolysable groups and selected from certain silanes and/or silyl functional molecules; and (iii) a condensation catalyst selected from the group of titanates and/or zirconates. The molar ratio of the sum of moisture present in the composition and total silicon bonded hydroxyl groups: the catalyst (“the molar ratio”) is >7:1. When the molar ratio is from >7:1 to 10:1, the molar ratio of total silicon bonded hydroxyl groups:total hydrolysable groups is between 0.1:1 to 0.3:1. When the molar ratio is >10:1, the molar ratio of total silicon bonded hydroxyl groups:total hydrolysable groups is between 0.1:1 to 0.5:1.Type: ApplicationFiled: July 17, 2018Publication date: July 23, 2020Inventors: Frederic GUBBELS, Thierry CORREMANS, Julien RENAUD, Francois DE BUYL, Martijn BEUKEMA, Victor BAILY, Gregory CHAMBARD
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Patent number: 10717870Abstract: A room temperature curable composition is disclosed. The composition can be used as an encapsulation/potting material. The composition comprises: (i) at least one condensation curable silyl terminated polymer having at least one silicon bonded hydroxyl functional group per molecule; (ii) a cross-linker having at least two hydrolysable groups and selected from certain silanes and/or silyl functional molecules; and (iii) a condensation catalyst selected from the group of titanates and/or zirconates. The molar ratio of the sum of moisture present in the composition and total silicon bonded hydroxyl groups:the catalyst (“the molar ratio”) is >7:1. When the molar ratio is from >7:1 to 10:1, the molar ratio of total silicon bonded hydroxyl groups:total hydrolysable groups is between 0.1:1 to 0.3:1. When the molar ratio is >10:1, the molar ratio of total silicon bonded hydroxyl groups:total hydrolysable groups is between 0.1:1 to 0.5:1.Type: GrantFiled: July 17, 2018Date of Patent: July 21, 2020Assignee: DOW SILICONES CORPORATIONInventors: Frederic Gubbels, Thierry Cooremans, Julien Renaud, Francois De Buyl, Martijn Beukema, Victor Baily, Gregory Chambard
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Patent number: 9493615Abstract: The invention provides a composition comprising a polyolefin and a polyorganosiloxane in which at least 50 mole % of the siloxane units are D units as herein defined and which contains at least one unsaturated group, characterized in that the unsaturated group is group of the formula —X—CH?CH—R? (I) or —X—C?C—R? (II), in which X represents a divalent organic linkage having an electron withdrawing effect with respect to the —CH?CH— or —C?C— bond and/or containing an aromatic ring or a further olefinic double bond or acetylenic unsaturation, the aromatic ring or the further olefinic double bond or acetylenic unsaturation being conjugated with the olefinic unsaturation of —X—CH?CH—R? or with the acetylenic unsaturation of —X—C?C—R? and R? represents hydrogen or a group having an electron withdrawing effect or any other activation effect with respect to the —CH?CH— or —C?C— bond.Type: GrantFiled: December 22, 2010Date of Patent: November 15, 2016Assignee: Dow Corning CorporationInventors: Michael Backer, Francois De Buyl, Damien Deheunynck, Valerie Smits
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Patent number: 9388265Abstract: Methods for producing a silyl-functionalized polyolefin with silyl monomer incorporation are provided. The method includes reacting a silicon-containing olefin with an ?-olefin, in the presence of a catalytic amount of a group IV catalyst for a time sufficient to produce a silyl-functionalized polyolefin.Type: GrantFiled: January 17, 2012Date of Patent: July 12, 2016Assignees: DOW CORNING CORPORATION, NORTHWESTERN UNIVERSITYInventors: Gary Thomas Burns, Francois De Buyl, Peng-Fei Fu, Tobin J. Marks, Valerie Smits
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Publication number: 20150337088Abstract: The invention provides a substrate in powder or fibre form whose surface is treated with a silicone compound, characterised in that the surface has been treated with an emulsion containing the silicone compound, water and a ethylene oxide/propyl ene oxide block copolymer.Type: ApplicationFiled: January 31, 2013Publication date: November 26, 2015Inventors: Pierre Chevalier, Francois De Buyl, Scott Miller, Christophe Paulo, Vincent Rerat
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Patent number: 9181379Abstract: The invention provides a process for grafting silane or silicone functionality onto a polyolefin, comprising reacting the polyolefin with an unsaturated monomer (A) containing an olefinic —C?C— bond or acetylenic —C?C— bond and a reactive functional group X in the presence of means capable of generating free radical sites in the polyolefin and with an organosilicon compound (B) having a functional group Y which is reactive with the functional group X of the unsaturated monomer (A), characterized in that the unsaturated monomer (A) contains an aromatic ring or a further olefinic double bond or acetylenic unsaturation, the aromatic ring or the further olefinic double bond or acetylenic unsaturation being conjugated with the olefinic —C?C— or acetylenic —C?C— unsaturation of the unsaturated monomer (A).Type: GrantFiled: December 22, 2010Date of Patent: November 10, 2015Assignee: DOW CORNING CORPORATIONInventors: Michael Backer, Francois De Buyl, Damien Deheunynck, Jean De La Croix Habimana, Vincent Rerat, Valerie Smits
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Patent number: 9080057Abstract: This invention relates to the treatment of a carbon based filler with a hydrolysable silane to modify the surface of the filler. It also relates to a carbon based filler modified by treatment with a hydrolysable silane, and to polymer compositions containing such a modified carbon based filler.Type: GrantFiled: December 7, 2012Date of Patent: July 14, 2015Assignee: Dow Corning CorporationInventors: Michael Wolfgang Backer, Thomas Chaussee, Olivier Debever, Francois De Buyl
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Publication number: 20140357800Abstract: This invention relates to the treatment of carbon based fillers with amines, including piperazines and aziridines, to modify the surface of the filler.Type: ApplicationFiled: December 7, 2012Publication date: December 4, 2014Inventors: Mihael Wolfgang Backer, Thomas Chaussee, Olivier Debever, Francois De Buyl
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Publication number: 20140350152Abstract: This invention relates to the treatment of a carbon based filler with a hydrolysable silane to modify the surface of the filler. It also relates to a carbon based filler modified by treatment with a hydrolysable silane, and to polymer compositions containing such a modified carbon based filler.Type: ApplicationFiled: December 7, 2012Publication date: November 27, 2014Inventors: Michael Wolfgang Backeer, Thomas Chaussee, Olivier Debever, Francois De Buyl
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Publication number: 20140329976Abstract: This invention relates to the treatment of a carbon based filler with a hydrolysable silane to modify the surface of the filler. It also relates to a carbon based filler modified by treatment with a hydrolysable silane, and to polymer compositions containing such a modified carbon based filler.Type: ApplicationFiled: December 7, 2012Publication date: November 6, 2014Inventors: Michael Wolfgang Backer, Thomas Chaussee, Olivier Debever, Francois De Buyl
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Publication number: 20140011900Abstract: Methods for producing a silyl-functionalized polyolefin with silyl monomer incorporation are provided. The method includes reacting a silicon-containing olefin with an ?-olefin, in the presence of a catalytic amount of a group IV catalyst for a time sufficient to produce a silyl-functionalized polyolefin.Type: ApplicationFiled: January 17, 2012Publication date: January 9, 2014Applicants: NORTHWESTERN UNIVERSITY, DOW CORNING CORPORATIONInventors: Gary Thomas Burns, Tobin J. Marks, Francois De Buyl, Valerie Smits, Peng-Fei Fu
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Patent number: 8592545Abstract: A polyorganosiloxane polyoxyalkylene block copolymer having one or more polyorganosiloxane blocks and one or more polyoxyalkylene blocks linked to each other via divalent radicals which comprises at least two silicon-bonded alkoxy groups, preferably of the form PS (A PO)m (A PS)n, wherein PO is a polyoxyalkylene block, PS represents a polyorganosiloxane block, A is a divalent radical, m and n have independently a value of at least 1, comprising at least one alkoxy-substituted siloxane unit of the formula (R?)q(OR)—SiO3?q/2 ?, wherein R represents an alkyl group having 1 to 4 carbon atoms and each R? represents an alkyl group having 1 to 6 carbon atoms, a phenyl group, or an alkoxy group of the formula —OR and q has a value of 0, 1 or 2, provided at least two silicon-bonded groups OR are present in the block copolymer.Type: GrantFiled: April 30, 2008Date of Patent: November 26, 2013Assignee: Dow Corning CorporationInventors: Iain A. Mackinnon, Sarah O'Hare, Francois De Buyl, Geraldine Durand
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Patent number: 8569417Abstract: The invention relates to a process for grafting hydrolysable silane groups to a polyolefin in which ethylene units, if present, form less than 50% by weight of the total polyolefin. The polyolefin is reacted with an unsaturated silane, having at least one hydrolysable group bonded to Si, or a hydrolysate thereof, in the presence of means capable of generating free radical sites in the polyolefin. The unsaturated silane has the formula R?—CH?CH—Z (I) or R?—C?C—Z (II) in which Z represents an electron-withdrawing moiety substituted by a —SiRaR?(3-a) group wherein R represents a hydrolysable group; R? represents a hydrocarbyl group having 1 to 6 carbon atoms; a has a value in the range 1 to 3 inclusive; and R? represents hydrogen or a group having an electron withdrawing or any other activation effect with respect to the —CH?CH— or —C?C— bond.Type: GrantFiled: July 2, 2009Date of Patent: October 29, 2013Assignee: Dow Corning CorporationInventors: Michael Backer, Francois De Buyl, Valerie Smits, Damien Deheunynck
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Publication number: 20120283346Abstract: The invention provides a process for grafting silane or silicone functionality onto a polyolefin, comprising reacting the polyolefin with an unsaturated monomer (A) containing an olefinic —C?C— bond or acetylenic —C?C— bond and a reactive functional group X in the presence of means capable of generating free radical sites in the polyolefin and with an organosilicon compound (B) having a functional group Y which is reactive with the functional group X of the unsaturated monomer (A), characterized in that the unsaturated monomer (A) contains an aromatic ring or a further olefinic double bond or acetylenic unsaturation, the aromatic ring or the further olefinic double bond or acetylenic unsaturation being conjugated with the olefinic —C?C— or acetylenic —C?C— unsaturation of the unsaturated monomer (A).Type: ApplicationFiled: December 22, 2010Publication date: November 8, 2012Inventors: Michael Backer, Francois De Buyl, Damien Deheunynck, Jean De La Croix Habimana, Vincent Rerat, Valerie Smits
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Publication number: 20120283362Abstract: The invention provides a composition comprising a polyolefin and a polyorganosiloxane in which at least 50 mole % of the siloxane units are D units as herein defined and which contains at least one unsaturated group, characterized in that the unsaturated group is group of the formula —X—CH?CH—R? (I) or —X—C?C—R? (II), in which X represents a divalent organic linkage having an electron withdrawing effect with respect to the —CH?CH— or —C?C— bond and/or containing an aromatic ring or a further olefinic double bond or acetylenic unsaturation, the aromatic ring or the further olefinic double bond or acetylenic unsaturation being conjugated with the olefinic unsaturation of —X—CH?CH—R? or with the acetylenic unsaturation of —X—C?C—R? and R? represents hydrogen or a group having an electron withdrawing effect or any other activation effect with respect to the —CH?CH— or —C?C— bond.Type: ApplicationFiled: December 22, 2010Publication date: November 8, 2012Inventors: Michael Backer, Francois De Buyl, Damien Deheunynck, Valerie Smits
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Publication number: 20120283388Abstract: The invention provides a process for grafting silicone onto a polyolefin comprising reacting the polyolefin with a silicon compound containing an unsaturated group in the presence of means capable of generating free radical sites in the polyolefin, characterized in that the silicon compound is a branched silicone resin containing at least one group of the formula —X—CH?CH—R? (I) or —X—C?C—R? (II), in which X represents a divalent organic linkage having an electron withdrawing effect with respect to the —CH?CH— or —C?C-bond and/or containing an aromatic ring or a further olefinic double bond or acetylenic unsaturation, the aromatic ring or the further olefinic double bond or acetylenic unsaturation being conjugated with the olefinic unsaturation of —X—CH?CH—R? or with the acetylenic unsaturation of —X—C?C—R?, X being bonded to the branched silicone resin by a C—Si bond, and R? represents hydrogen or a group having an electron withdrawing effect or any other activation effect with respect to the —CH?CH— or —C?CType: ApplicationFiled: December 22, 2010Publication date: November 8, 2012Inventors: Michael Backer, Thomas Chausse, Francois De Buyl, Damien Deheunynck, Satoshi Onodera, Valerie Smits
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Publication number: 20120065319Abstract: This invention relates to the modification of elastomers by reaction with unsaturated silanes, to the modified elastomers produced and to articles produced by shaping and curing modified elastomer compositions. It also relates to the use of unsaturated silanes as coupling agents in filled elastomer compositions. In a process according to the present invention, the silane has the formula: R?—CH?CH—C(O)X—Y—SiRaR?(3-a) (I) or R?—C?C—C(O)X—Y—SiRaR?(3-a) (II) in which R represents a hydrolysable group; R? represents a hydrocarbyl group having 1 to 6 carbon atoms; a has a value in the range 1 to 3 inclusive; Y represents a divalent organic spacer linkage comprising at least one carbon atom separating the linkage —C(O)X— from the Si atom, X is selected from S or O; and R? represents hydrogen or a group having an electron withdrawing effect with respect to the —CH?CH— or —C?C— bond. This provides silanes able to react efficiently with a diene elastomer in the presence of a free radical initiator.Type: ApplicationFiled: April 28, 2010Publication date: March 15, 2012Inventors: Michael Backer, Thomas Chaussee, Francois De Buyl, Valerie Smits
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Publication number: 20120059121Abstract: This invention relates to the modification of elastomers by reaction with unsaturated silanes, to the modified elastomers produced and to articles produced by shaping and curing modified elastomer compositions. In a process according to the present, the silane has the formula: R?—CH?CH—C(O)X—Y—SiRaR?(3-a) (I) or R?—C?C—C(O)X—Y—SiRaR?(3-a) (II) in which R represents a hydrolysable group; R? represents a hydrocarbyl group having 1 to 6 carbon atoms; a has a value in the range 1 to 3 inclusive; Y represents a divalent organic spacer linkage comprising at least one carbon atom separating the linkage —C(O)X— from the Si atom, X is S or O; and R? represents hydrogen or a group having an electron withdrawing effect with respect to the —CH?CH— or —C?C— bond; and the silane is reacted with the diene elastomer in the absence of any free radical initiator. This is advantageous because free radical initiators such as peroxides tend to degrade diene elastomers.Type: ApplicationFiled: April 28, 2010Publication date: March 8, 2012Inventors: Michael Backer, Thomas Chaussee, Francois De Buyl, Valerie Smits