Patents by Inventor Kent R. Larson
Kent R. Larson 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: 20180127552Abstract: A gel having improved thermal stability is the hydrosilylation reaction product of (A) an organopolysiloxane having an average of at least 0.1 silicon-bonded alkenyl group per molecule and (B) a cross-linker having an average of at least 2 silicon-bonded hydrogen atoms per molecule. (A) and (B) react via hydrosilylation in the presence of (C) a hydrosilylation catalyst and (D) a heated reaction product of iron acetylacetonate. The iron acetylacetonate is present prior to heating in an amount of from about 0.05 to about 30 weight percent based on a total weight of (A) and (B). The gel is formed using a method that includes the steps of (I) heating the iron acetylacetonate to form the (D) heated reaction product of the iron acetylacetonate and (II) combining (A), (B), (C) and (D) to effect the hydrosilylation reaction of (A) and (B) in the presence of (C) and (D) to form the gel.Type: ApplicationFiled: January 3, 2018Publication date: May 10, 2018Inventors: Matt D. Dowland, Daesup Hyun, John J. Kennan, Kent R. Larson, Randall G. Schmidt, Shengqing Xu
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Patent number: 9947858Abstract: The present invention provides a curable organopolysiloxane composition capable of producing a cured article that can be used as a transducer and provided with excellent mechanical characteristics and/or electrical characteristics. The present invention also relates to a novel curable organopolysiloxane composition for transducer use comprising a curable organopolysiloxane composition, dielectric inorganic fine particles having a specific dielectric constant of greater than or equal to 10, and fine particles having a specific dielectric constant of less than 10.Type: GrantFiled: December 26, 2013Date of Patent: April 17, 2018Assignees: DOW CORNING CORPORATION, DOW CORNING TORAY CO., LTD.Inventors: Toyohiko Fujisawa, Hiroshi Fukui, Haruhiko Furukawa, Peter Cheshire Hupfield, Hong Sub Kim, Eiji Kitaura, Kent R. Larson, Wataru Nishiumi, Takuya Ogawa, Masayuki Onishi, Kouichi Ozaki, Keiji Wakita
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Patent number: 9879126Abstract: The present invention provides a curable organopolysiloxane composition capable of producing a cured article that can be used as a transducer and provided with excellent mechanical characteristics and/or electrical characteristics. The present invention also relates to a novel curable organopolysiloxane composition for transducer use comprising a curable organopolysiloxane composition and a compound having a highly dielectric functional group.Type: GrantFiled: December 26, 2013Date of Patent: January 30, 2018Assignees: DOW CORNING CORPORATION, DOW CORNING TORAY CO., LTD.Inventors: Haruhiko Furukawa, Peter Cheshire Hupfield, Hong Sub Kim, Eiji Kitaura, Kent R. Larson, Wataru Nishiumi, Takuya Ogawa, Kouichi Ozaki, Son Thanh Phan, Keiji Wakita
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Publication number: 20150380636Abstract: The present invention provides a curable organopolysiloxane composition capable of producing a cured article that can be used as a transducer and provided with excellent mechanical characteristics and/or electrical characteristics. The present invention also relates to a novel curable organopolysiloxane composition for transducer use comprising a curable organopolysiloxane composition, dielectric inorganic fine particles having a specific dielectric constant of greater than or equal to 10, and fine particles having a specific dielectric constant of less than 10.Type: ApplicationFiled: December 26, 2013Publication date: December 31, 2015Inventors: Toyohiko Fujisawa, Hiroshi Fukui, Haruhiko Furukawa, Peter Cheshire Hupfield, Hong Sub Kim, Eiji Kitaura, Kent R. Larson, Wataru Nishiumi, Takuya Ogawa, Masayuki Onishi, Kouichi Ozaki, Keiji Wakita
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Publication number: 20150344671Abstract: The present invention provides a curable organopolysiloxane composition capable of producing a cured article that can be used as a transducer and provided with excellent mechanical characteristics and/or electrical characteristics. The present invention also relates to a novel curable organopolysiloxane composition for transducer use comprising a curable organopolysiloxane composition and a compound having a highly dielectric functional group.Type: ApplicationFiled: December 26, 2013Publication date: December 3, 2015Inventors: Haruhiko Furukawa, Peter Cheshire Hupfield, Hong Sub Kim, Eiji Kitaura, Kent R. Larson, Wataru Nishiumi, Takuya Ogawa, Kouichi Ozaki, Son Thanh Phan, Keiji Wakita
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Publication number: 20150130086Abstract: A gel has improved thermal stability and is the hydrosilylation reaction product of (A) an organopolysiloxane having an average of at least 0.1 silicon-bonded alkenyl group per molecule and (B) a cross-linker having an average of at least 2 silicon-bonded hydrogen atoms per molecule. (A) and (B) react via hydrosilylation in the presence of (C) a hydrosilylation catalyst and (D) a phthalocyanine. The (D) phthalocyanine is present in an amount of from about 0.05 to about 30 weight percent based on a total weight of (A) and (B). The gel has a hardness of less than about 1500 grams as measured after heat ageing at 225° C. for 1000 hours that is calculated as a weight required to insert a TA-23 probe into the gel to a depth of 3 mm.Type: ApplicationFiled: February 9, 2012Publication date: May 14, 2015Inventors: Dorab E. Bhagwagar, Daesup Hyun, Kelly J. Messing, Kent R. Larson
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Publication number: 20140291872Abstract: A gel has improved thermal stability and is the ultraviolet hydrosilylation reaction product of (A) an organopolysiloxane having an average of at least 0.1 silicon-bonded alkenyl group per molecule and (B) a cross-linker having an average of at least 2 silicon-bonded hydrogen atoms per molecule. (A) and (B) react via hydrosilylation in the presence of (C) a UV-activated hydrosilylation catalyst comprising at least one of platinum, rhodium, ruthenium, palladium, osmium, and iridium, and (D) a thermal stabilizer. The (D) thermal stabilizer is present in an amount of from about 0.01 to about 30 weight percent based on a total weight of (A) and (B) and having transparency to UV light sufficient for the ultraviolet hydrosilylation reaction product to form.Type: ApplicationFiled: October 5, 2012Publication date: October 2, 2014Inventors: Brian R. Harkness, Malinda N. Howell, Daesup Hyun, Jing Jiang, John J. Kennan, Kent R. Larson, Randall G. Schmidt, Shengqing Xu
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Publication number: 20140287247Abstract: A gel having improved thermal stability is the hydro silylation reaction product of (A) an organopolysiloxane having an average of at least 0.1 silicon-bonded alkenyl group per molecule and (B) a cross-linker having an average of at least 2 silicon-bonded hydrogen atoms per molecule. (A) and (B) react via hydrosilylation in the presence of (C) a hydrosilylation catalyst and (D) a heated reaction product of iron acetylacetonate. The iron acetylacetonate is present prior to heating in an amount of from about 0.05 to about 30 weight percent based on a total weight of (A) and (B). The gel is formed using a method that includes the steps of (I) heating the iron acetylacetonate to form the (D) heated reaction product of the iron acetylacetonate and (II) combining (A), (B), (C) and (D) to effect the hydrosilylation reaction of (A) and (B) in the presence of (C) and (D) to form the gel.Type: ApplicationFiled: October 5, 2012Publication date: September 25, 2014Inventors: Matt D. Dowland, Daesup Hyun, John J. Kennan, Kent R. Larson, Randall G. Schmidt, Shengqing Xu
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Patent number: 5629399Abstract: A room temperature curable organosiloxane composition, containing an alkenyl-containing polyorganosiloxane, an organohydrogensiloxane, a platinum catalyst, a methylvinylcyclosiloxane and an acetylenic alcohol, which exhibits a long working time and a fast cure time.Type: GrantFiled: March 5, 1996Date of Patent: May 13, 1997Assignee: Dow Corning CorporationInventors: Donnie R. Juen, Kent R. Larson, Myron T. Maxson, Lawrence J. Rapson
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Patent number: 5520767Abstract: Liquid adhesion-promoting compositions for cohesively bonding organosiloxane materials to organic polymers comprise (A) a copolymer derived from at least one ethylenically unsaturated organic compound and at least one silane containing an ethylenically unsaturated organic group and at least two silicon-bonded hydrolyzable groups per molecule, (B) an organohydrogensiloxane, (C) an aminosilane containing at least 2 alkoxy or other hydrolyzable groups, and (D) an amount of an organic liquid sufficient to solubilize ingredients A, B and C of said composition and achieve the desired viscosity.Type: GrantFiled: January 6, 1995Date of Patent: May 28, 1996Assignee: Dow Corning CorporationInventor: Kent R. Larson
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Patent number: 5459194Abstract: Liquid adhesion-promoting compositions for cohesively bonding organosiloxane materials to organic polymers comprise (A) a copolymer derived from at least one ethylenically unsaturated organic compound and at least one silane containing an ethylenically unsaturated organic group and at least two silicon-bonded hydrolyzable groups per molecule, (B) an organohydrogensiloxane, (C) an aminosilane containing at least 2 alkoxy or other hydrolyzable groups, and (D) an amount of an organic liquid sufficient to solubilize ingredients A, B and C of said composition and achieve the desired viscosity.Type: GrantFiled: May 31, 1994Date of Patent: October 17, 1995Assignee: Dow Corning CorporationInventor: Kent R. Larson
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Patent number: 5458980Abstract: Adhesion promoting compositions for bonding a layer of organic polymer to a layer of organosiloxane elastomer during curing of the elastomer by a platinum group metal-catalyzed hydrosilation reaction comprise (a) a copolymer containing repeating units derived from at least one ethylenically unsaturated organic compound and at least one silane containing an ethylenically unsaturated organic group and at least two silicon-bonded hydrolyzable groups per molecule, and (b) an organohydrogensiloxane containing an average of at least three silicon-bonded hydrogen atoms per molecule. If the adhesion promoting composition is to be used with an elastomer prepared by curing an organosiloxane elastomer at temperatures below about 80 degrees C., the adhesion promoting composition includes an alkyl orthosilicate and an organotitanium compound.Type: GrantFiled: October 11, 1994Date of Patent: October 17, 1995Assignee: Dow Corning CorporationInventor: Kent R. Larson
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Patent number: 5442027Abstract: Low concentrations of a liquid silanol terminated polydiorganosiloxane with a number average molecular weight less than about 1000 extend the working time of tin-catalyzed moisture curable organosiloxane compositions without substantially decreasing the cure rate of the composition or adversely affecting the physical properties of cured materials, particularly elastomers, prepared using these compositions.Type: GrantFiled: June 23, 1994Date of Patent: August 15, 1995Assignee: Dow Corning CorporationInventors: Joan M. Donatelli, Daniel F. McMahon, Kent R. Larson
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Patent number: 5424357Abstract: Adhesion promoting compositions for bonding a layer of organic polymer to a layer of organosiloxane elastomer during curing of the elastomer by a platinum group metal-catalyzed hydrosilation reaction comprise (a) a copolymer containing repeating units derived from at least one ethylenically unsaturated organic compound and at least one silane containing an ethylenically unsaturated organic group and at least two silicon-bonded hydrolyzable groups per molecule, and (b) an organohydrogensiloxane containing an average of at least three silicon-bonded hydrogen atoms per molecule. If the adhesion promoting composition is to be used with an elastomer prepared by curing an organosiloxane elastomer at temperatures below about 80 degrees C., the adhesion promoting composition includes an alkyl orthosilicate and an organotitanium compound.Type: GrantFiled: December 2, 1993Date of Patent: June 13, 1995Assignee: Dow Corning CorporationInventor: Kent R. Larson
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Patent number: 5283307Abstract: Organosiloxane compositions curable by a platinum-catalyzed hydrosilation reaction contain as the adhesion promoter a silane comprising an silicon-bonded alkenyl radical containing at least five carbon atoms and at least one alkoxy group. The silane or a hydrolysis-condensation product thereof is optionally used in combination with a catalyst that promotes reaction of the silane with groups present on the surface of the substrate to which bonding is desired.Type: GrantFiled: August 31, 1992Date of Patent: February 1, 1994Assignee: Dow Corning CorporationInventor: Kent R. Larson
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Patent number: 5145918Abstract: A composition useful for adhering polysulfide sealant to silicone sealant or to silicone sealant contaminated surfaces is obtained by mixing 1 part by weight of alkoxy functional, titanate catalyzed silicone sealant with from 0.1 to 40 parts by eight of polysulfide sealant.Type: GrantFiled: January 18, 1991Date of Patent: September 8, 1992Assignee: Dow Corning CorporationInventor: Kent R. Larson
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Patent number: 5126208Abstract: An optical laminate having improved resistance to delamination upon exposure to moisture consists essentially of a layer of organosiloxane composition, a primer layer, and a layer of organic elastomer. The organosiloxane composition comprises a polydiorganosiloxane gum containing at least two ethylenically unsaturated hydrocarbon radicals per molecule, an organohydrogensiloxane containing at least two silicon-bonded hydrogen atoms per molecule, and a platinum containing hydrosilation catalyst. The primer comprises a specific mixture of organosilicone compound, silane copolymer, organohydrogensiloxane, and solvent being as least 50 percent of an ethylenically unsaturated alcohol. The organic elastomer is selected from a polyvinylbutyral or polyurethane of the types used for optical laminates.Type: GrantFiled: October 12, 1990Date of Patent: June 30, 1992Assignee: Dow Corning CorporationInventor: Kent R. Larson
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Patent number: D353037Type: GrantFiled: September 21, 1992Date of Patent: December 6, 1994Assignee: Minnesota Athletic Apparel, Inc.Inventor: Kent R. Larson