Patents by Inventor Wataru Nishiumi
Wataru Nishiumi 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: 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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Patent number: 8101677Abstract: A multi-component room-temperature-curable silicone rubber composition comprising at least: (A) a diorganopolysiloxane, (B) a methoxy group-containing silicon compound comprising a bis(methoxysilyl)alkane or a organotrimethoxysilane (except amino group containing organotrimethoxysilane) (B-1), a methoxy group-containing carbasilatrane derivative (B-2), and an aminoalkylmethoxysilane (B-3) (wherein the weight ratio of constituent (B-2) to constituent (B-3) is in the range of (20:80) to (80:20)); and (C) a curing catalyst, the composition being packaged as two or more separately stored compositions wherein none of said separately stored compositions contain all said components (A), (B), and (C) simultaneously.Type: GrantFiled: September 29, 2006Date of Patent: January 24, 2012Assignee: Dow Corning Toray Company, Ltd.Inventors: Wataru Nishiumi, Hirotoki Morimoto
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Patent number: 7902290Abstract: A method of inhibiting or reducing discoloration of a diorganopolysiloxane composition comprising the steps of mixing: said composition with the following components in any order: i) a source of ferrous ions; and ii) 0.0001-0.05 wt. % per total weight of the composition of a bis(2-pyridylthio-1-oxide) non-ferrous salt per total weight of the composition.Type: GrantFiled: December 20, 2004Date of Patent: March 8, 2011Assignee: Dow Corning Toray Company, Ltd.Inventors: Wataru Nishiumi, Hiroshi Adachi, Eiji Horita
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Publication number: 20090281222Abstract: A multi-component room-temperature-curable silicone rubber composition comprising at least: (A) a diorganopolysiloxane, (B) a methoxy group-containing silicon compound comprising a bis(methoxysilyl)alkane or a organotrimethoxysilane (except amino group containing organotrimethoxysilane) (B-1), a methoxy group-containing carbasilatrane derivative (B-2), and an aminoalkylmethoxysilane (B-3) (wherein the weight ratio of constituent (B-2) to constituent (B-3) is in the range of (20:80) to (80:20)); and (C) a curing catalyst, the composition being packaged as two or more separately stored compositions wherein none of said separately stored compositions contain all said components (A), (B), and (C) simultaneously.Type: ApplicationFiled: September 29, 2006Publication date: November 12, 2009Applicant: DOW CORNING TORAY COMPANY, LTD.Inventors: Wataru Nishiumi, Hirotoki Morimoto
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Publication number: 20070219297Abstract: A method of inhibiting or reducing discoloration of a diorganopolysiloxane composition comprising the steps of mixing: said composition with the following components in any order: i) a source of ferrous ions; and ii) 0.0001-0.05 wt.Type: ApplicationFiled: December 20, 2004Publication date: September 20, 2007Applicant: DOW CORNING TORAY COMPANY, LTD.Inventors: Wataru Nishiumi, Hiroshi Adachi, Eiji Horita
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Patent number: 6811650Abstract: An adhesive for silicone rubber, comprising at least the following: A 100 parts by weight of an organopolysiloxane having an average of two or more alkenyl groups per molecule; B an organopolysiloxane having an average of two or more silicon bonded hydrogen atoms in each molecule, used in an amount such that the molar ratio of silicon bonded hydrogen atoms in component B to alkenyl groups in component A at which the molar ratio of the silicon bonded hydrogen atoms in this component to the alkenyl groups in component A is from 0.01 to 20 (i.e. from 1:100 to 20:1); C from 5 to 200 parts by weight of calcium carbonate powder with a BET specific surface area of from 5 to 50 m2g; and D a platinum-based catalyst, used in an amount capable of inducing curing in the present composition.Type: GrantFiled: January 9, 2002Date of Patent: November 2, 2004Assignee: Dow Corning Toray Silicones, Ltd.Inventors: Osamu Takuman, Hideo Shinmi, Wataru Nishiumi
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Publication number: 20020129898Abstract: An adhesive for silicone rubber, comprising at least the following: A 100 parts by weight of an organopolysiloxane having an average of two or more alkenyl groups per molecule; B an organopolysiloxane having an average of two or more silicon bonded hydrogen atoms in each molecule, used in an amount such that the molar ratio of silicon bonded hydrogen atoms in component B to alkenyl groups in component A at which the molar ratio of the silicon bonded hydrogen atoms in this component to the alkenyl groups in component A is from 0.01 to 20 (i.e. from 1:100 to 20:1); C from 5 to 200 parts by weight of calcium carbonate powder with a BET specific surface area of from 5 to 50 m2g; and D a platinum-based catalyst, used in an amount capable of inducing curing in the present composition.Type: ApplicationFiled: January 9, 2002Publication date: September 19, 2002Inventors: Osamu Takuman, Hideo Shinmi, Wataru Nishiumi
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Publication number: 20010034403Abstract: A silicone rubber composition comprisingType: ApplicationFiled: February 20, 2001Publication date: October 25, 2001Inventors: Osamu Takuman, Hideo Shinmi, Wataru Nishiumi
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Patent number: 6265516Abstract: An anti-staining additive comprising a higher unsaturated aliphatic acid ester-modified organosilicon compound that is produced by carrying out an addition reaction between (a) a higher unsaturated aliphatic acid ester that contains more than one aliphatically unsaturated bond in each molecule and (b) an organosilicon compounds that contains at least 1 silicon-bonded hydrogen atom in each molecule with the aliphatically unsaturated bonds in component (a) present in molar excess over the silicon-bonded hydrogen in component (b). The additive can be used at 0.01 to 50 weight percent in a polyorganosiloxane composition that cures at room temperature by a condensation reaction.Type: GrantFiled: February 18, 2000Date of Patent: July 24, 2001Assignee: Dow Corning Toray Silicone Company, Ltd.Inventors: Tadashi Okawa, Wataru Nishiumi, Seiji Hori
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Patent number: 6166121Abstract: A curable organopolysiloxane composition that can form a cured product that is strongly adhesive to substrates such as glasses, plastics, and metals and exhibits a very durable adhesion in which adhesiveness is maintained even under severe conditions such as immersion in hot water. The curable organopolysiloxane composition comprises from 1 to 75 weight % of a calcium carbonate powder whose surface has been treated with both (a) a rosin or a rosin derivative and (b) a fatty acid or a fatty acid derivative.Type: GrantFiled: April 23, 1999Date of Patent: December 26, 2000Assignee: Dow Corning Toray Silicone Co., Ltd.Inventors: Wataru Nishiumi, Seiji Hori
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Patent number: 5824736Abstract: The present fluorosilicone rubber composition cures to give fluorosilicone rubber moldings with excellent physical properties. The fluorosilicone rubber composition comprises:(A) a 3,3,3-trifluoropropylmethylsiloxane-methylvinylsiloxane copolymer gum,(B) a dimethylsiloxane-methylvinylsiloxane copolymer gum,(C) a poly(3,3,3-trifluoropropylmethylsiloxane)-polydimethylsiloxane block copolymer or (C-2) a poly(3,3,3-trifluoropropylmethylsiloxane)-polydimethylsiloxane-polymethylv inylsiloxane block copolymer,(D) a reinforcing silica micropowder that has a surface area of at least 50 m.sup.2 /g, and(E) a curing agent.Type: GrantFiled: September 21, 1993Date of Patent: October 20, 1998Assignee: Dow Corning Toray Silicone Co., Ltd.Inventors: Hideki Kobayashi, Wataru Nishiumi
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Patent number: 5578381Abstract: The present invention relates to a release coating composition comprising an organopolysiloxane having fluorine containing organic groups and alkenyl groups, an organohydrogensiloxane, and a platinum-containing catalyst. The present invention also relates to a release coating composition comprising an organopolysiloxane having fluorine containing organic groups and silicon-bonded hydrogen groups, an alkenyl functional organopolysiloxane, and a platinum-containing catalyst. The curable silicone release coating compositions of this invention have excellent release properties from various tacky substances, especially silicone-based pressure sensitive adhesives, after curing, and also have excellent bonding characteristics when applied to various substrates.Type: GrantFiled: August 30, 1995Date of Patent: November 26, 1996Assignee: Dow Corning Toray Silicone Co., Ltd.Inventors: Yuji Hamada, Hideki Kobayashi, Wataru Nishiumi
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Patent number: 5545831Abstract: The present invention relates to a silicone composition comprising (A) a silicone release coating composition and (B) an organosilicon compound having the general formula ##STR1## where R.sup.1 is a monovalent hydrocarbon group, R.sup.2 is an alkylene group, R.sup.3 is a hydrogen atom, an alkenyl group, or a hydroxyl group, m has a value of zero or greater, and n has a value of greater than zero which cures to form a release coating. The silicone release coating compositions of this invention give a cured release coating which exhibits optimal release values against lucky substances and which does not impair the residual adhesion of tacky substances.Type: GrantFiled: October 19, 1994Date of Patent: August 13, 1996Assignee: Dow Corning Toray Silicone Co., LTD.Inventors: Nobuo Kaiya, Hideki Kobayashi, Wataru Nishiumi
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Patent number: 5527873Abstract: The present invention relates to a method for the preparation of silicone resins, the method comprising the steps of (I) mixing (a) a silicone resin, (b) an organic solvent, and (c) an acid catalyst to form a reaction product, and (II) reacting a diorganopolysiloxane or tetraorganodisiloxane with the reaction product of (I) at a temperature of 50.degree. C. to 150.degree. C. The present invention also relates to resins produced by the method of the present invention.Type: GrantFiled: February 17, 1995Date of Patent: June 18, 1996Assignee: Dow Corning Toray Silicone Co., Ltd.Inventors: Hideki Kobayashi, Wataru Nishiumi
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Patent number: 5270074Abstract: The present invention relates to a method for removing a silicone resin coating from a substrate comprising contacting the silicone resin coating with an aqueous alkali solution, wherein the silicone resin in the coating is a solid silicone resin having the formula (HR.sub.2 SiO.sub.1/2).sub.n (SiO.sub.4/2).sub.m, wherein R is an alkyl group, m is a number greater than 0, n is a number greater than 0, and n/m is greater than 0.2.Type: GrantFiled: September 28, 1992Date of Patent: December 14, 1993Assignee: Dow Corning Toray Silicone Co., Ltd.Inventors: Hideki Kobayashi, Wataru Nishiumi
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Patent number: 5262558Abstract: There is disclosed a method for making organo-silicon polymers from alkyldisiloxanes and alkylsilicates wherein the alkyl groups of the disiloxanes have two or more carbons. Gelling of the organo-silicon polymers is avoided by; first mixing the disiloxane with the alkylsilicate and adding thereto a strong protic acid; and, after reaction has occurred in the aforementioned mixture, adding thereto, in a drop-wise manner, a solution of hydrochloric acid.Type: GrantFiled: August 20, 1992Date of Patent: November 16, 1993Assignee: Dow Corning Toray Silicone Co., Ltd.Inventors: Hideki Kobayashi, Wataru Nishiumi
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Patent number: 5235004Abstract: A hexenyl-containing silicone resin is disclosed which has the average unit formula (CH.sub.2 .dbd.CHC.sub.4 H.sub.8 Me.sub.2 SiO.sub.1/2).sub.n (SiO.sub.4/2).sub.m wherein Me denotes a methyl radical, n and m are each numbers larger than zero, and the ratio n/m is 0.2 to 3.Type: GrantFiled: May 22, 1992Date of Patent: August 10, 1993Assignee: Dow Corning Toray Silicone Co., Ltd.Inventors: Hideki Kobayashi, Wataru Nishiumi