Patents Assigned to Dow Corning Toray Co., Ltd.
  • Patent number: 9006372
    Abstract: Branched silicone (organopolysiloxane) resins and preparation method and use thereof are provided, which contain at least one group selected from phosphonate and phosphinate groups and at least one organic group containing nitrogen. Such silicone resins can be used in thermoplastic, thermosetting or rubber organic polymer compositions to reduce the flammability of the organic polymer compositions.
    Type: Grant
    Filed: May 16, 2011
    Date of Patent: April 14, 2015
    Assignees: Dow Corning (Shanghai) Co Ltd, Dow Corning Toray Co., Ltd., Dow Corning Corporation
    Inventors: Michael Backer, Pierre Chevalier, Zhihua Liu, Ana Marques, Satoshi Onodera, Vincent Rerat, Motoshi Sasaki
  • Patent number: 8999485
    Abstract: A liquid silicone rubber composition comprising an alkenyl group-containing liquid organopolysiloxane, a reinforcing silica filler, an organohydrogenpolysiloxane, a platinum group catalyst, a liquid organopolysiloxane that is free of crosslinking groups and is compatible with the alkenyl group-containing liquid organopolysiloxane, and a liquid organopolysiloxane that is free of crosslinking groups and is incompatible with the alkenyl group-containing liquid organopolysiloxane, wherein the cured material therefrom has a JIS type A durometer hardness of 15 to 26 and a tensile stress at 100% elongation of 0.25 to 0.60 MPa. Also, a through hole-containing sealing member comprising this cured material.
    Type: Grant
    Filed: December 28, 2010
    Date of Patent: April 7, 2015
    Assignee: Dow Corning Toray Co., Ltd.
    Inventors: Takayoshi Otomo, Keiji Yoshida, Yuji Saito
  • Patent number: 9000472
    Abstract: Optical assemblies comprising an optical device and a composition comprising a resin-linear organosiloxane block copolymer are disclosed. In some embodiments, the organosiloxane block copolymers has a weight average molecular weight of at least 20,000 g/mole and includes 40 to 90 mole percent disiloxy units of the formula [R12SiO2/2] arranged in linear blocks each having an average of from 10 to 400 disiloxy units [R12SiO2/2] per linear block, 10 to 60 mole percent trisiloxy units of the formula [R2—SiO3/2] arranged in non-linear blocks each having a weight average molecular weight of at least 500 g/mol, and 0.5 to 25 mole percent silanol groups. R1 is independently a C1 to C30 hydrocarbyl and R2 is independently a C1 to C20 hydrocarbyl. At least 30% of the non-linear blocks are crosslinked with another non-linear block and aggregated in nano-domains. Each linear block is linked to at least one non-linear block.
    Type: Grant
    Filed: December 20, 2012
    Date of Patent: April 7, 2015
    Assignees: Dow Corning Corporation, Dow Corning Toray Co., Ltd.
    Inventors: Masaaki Amako, Steven Swier
  • Publication number: 20150072139
    Abstract: The present invention relates to a release film used by being interposed between a molding material and a mold when the molding material is compression molded using the mold in order to form a sealing material or reflective frame material for an optical semiconductor element, or a lens, wherein the release film comprises a silicone-based cured product layer (2) on at least a surface in contact with the molding material; as well as a compression molding method that uses the film; and a compression molding apparatus that uses the film. The release film for the compression molding of molding materials has good workability and has good releasability, and thereby, a compression molding method with which compression molding with good efficiency is possible and a compression molding apparatus with which molding with good efficiency is possible.
    Type: Application
    Filed: April 23, 2013
    Publication date: March 12, 2015
    Applicant: Dow Corning Toray Co., Ltd
    Inventors: Yoshitsugu Morita, Shin Yoshida, Syuji Endo
  • Patent number: 8962498
    Abstract: Provided is a liquid curable silicone rubber composition containing the following components of (A), (B), (C) and (D): (A) 100 parts by weight of an organopolysiloxane having one or more silicon atom-bonded alkenyl groups on average in one molecule, (B) (B-1) an organohydrogenpolysiloxane having at least three silicon atom-bonded hydrogen atoms in one molecule, wherein at least one of the hydrogen atoms is present as a siloxane unit represented by the formula of R1HSi02/2 (wherein R1 represents a non-substituted or substituted monovalent hydrocarbon group containing no aliphatic unsaturated bond) in the molecule and (B-2) a linear organohydrogenpolysiloxane having one silicon atom-bonded hydrogen atom only at each of both terminals of the molecular chain and having no aliphatic unsaturated bond(s) in a molecule, [provided that the blending amount of component (B-1) and component (B-2) is an amount such that the molar ratio of silicon atom-bonded hydrogen atoms contained in component (B-1) and component (B-2):
    Type: Grant
    Filed: April 26, 2011
    Date of Patent: February 24, 2015
    Assignees: Dow Corning Toray Co., Ltd., Dow Corning Corporation
    Inventors: Shinichi Yamamoto, Yuichi Tsuji, William R. Blackwood
  • Patent number: 8956449
    Abstract: [Problem to be Solved] To provide a non-curable coating composition which is used for preventing or reducing the adhesion of various sticky substances to the surfaces of substrates and is stable at elevated temperature, by using modified silicones having functional groups. [Means to Solve the Problem] A non-curable coating composition characterized by containing a carboxy-modified silicone with a carboxy group at a side chain thereof, and an epoxy/oxyalkylene-modified silicone with an epoxy group and an oxyalkylene group at a side chain thereof in a weight ratio ranging from 1:2 to 1:30, and further comprising an oxyalkylene-modified silicone having an HLB of 10 or more with an oxyalkylene group at a side chain thereof.
    Type: Grant
    Filed: April 1, 2011
    Date of Patent: February 17, 2015
    Assignee: Dow Corning Toray Co., Ltd.
    Inventors: Kazuhiko Kojima, Masaru Ozaki, Tsunehito Sugiura, Seiji Hori
  • Patent number: 8957153
    Abstract: A room-temperature-curable silicone rubber composition comprises: (A) an organopolysiloxane having on silicon atoms in the molecular chain in one molecule at least two specific alkoxysilyl-containing groups; (B) an organopolysiloxane having on silicon atom in the molecular chain neither a hydroxyl group nor an alkoxy group; (C) an alkoxysilane or its partial hydrolysis and condensation product; (D) a condensation reaction catalyst; and optionally comprises (E) an adhesion promoter and/or (F) a reinforcing filler. The composition cures at room temperature due to contact with atmospheric moisture and exhibits an excellent adhesiveness to substrate in contact with the composition during the cure of the composition.
    Type: Grant
    Filed: March 28, 2012
    Date of Patent: February 17, 2015
    Assignee: Dow Corning Toray Co., Ltd.
    Inventors: Harumi Kodama, Masayuki Onishi
  • Patent number: 8946353
    Abstract: A hydrosilylation reaction-curable organopolysiloxane composition comprising (A) a methylpheny-lalkenylpolysiloxane that has at least two alkenyl groups wherein diphenylsiloxane units are no more than 5 mole % and at least 20 mole % is comprised of phenyl groups, (B) a methylphenylhydrogenpolysiloxane that has at least two Si-bonded hydrogen atoms wherein diphenylsiloxane units are no more than 5 mole % and at least 20 mole % is comprised of phenyl groups, and (C) a hydrosilylation reaction catalyst. An optical semiconductor element sealant comprising this composition. An optical semiconductor device sealed with this optical semiconductor element sealant.
    Type: Grant
    Filed: October 30, 2009
    Date of Patent: February 3, 2015
    Assignee: Dow Corning Toray Co. Ltd.
    Inventors: Makoto Yoshitake, Takashi Sagawa, Masayoshi Terada
  • Patent number: 8925626
    Abstract: A substrate is surface treated using a composition for forming a film that comprises (A) an organoalkoxysilane, (B) an organopolysiloxane having a silicon-bonded hydrogen atom, and (C) a condensation reaction catalyst. This composition for forming a film can form a highly hydrophobic water repellent film provided with sufficient water shedding performance. It is possible to provide a highly hydrophobic substrate such as a heat dissipating body.
    Type: Grant
    Filed: April 4, 2012
    Date of Patent: January 6, 2015
    Assignee: Dow Corning Toray Co., Ltd.
    Inventors: Keiichi Akinaga, Tadashi Okawa, Kazuhiro Nishijima, Eiji Kitaura
  • Publication number: 20140377570
    Abstract: A curable silicone composition which comprises: (A) an organopolysiloxane represented by an average unit formula; (B) an organopolysiloxane that has not more than 10 silicon atoms wherein from 30 to 60 mole % of all silicon-bonded organic groups therein are C2-6191 alkenyl groups; (C) an organopolysiloxane represented by a general formula; (D) an organopolysiloxane that has at least two silicon-bonded hydrogen atoms in one molecule wherein from 20 to 70 mole % of all silicon-bonded organic groups therein are phenyl groups; (E) a hydrosilylation reaction catalyst; (F) a white pigment; (G) a nonspherical silica or a glass fiber; and (H) a spherical silica, exhibits an excellent moldability and forms a cured product that exhibits little heat- and/or light-induced discoloration, little heat- and/or light-induced decline in mechanical strength, a high light reflectance, and an excellent dimensional stability.
    Type: Application
    Filed: September 13, 2012
    Publication date: December 25, 2014
    Applicant: Dow Corning Toray Co., Ltd.
    Inventors: Kazuo Hirai, Makoto Yoshitake
  • Patent number: 8912132
    Abstract: A thermally conductive silicone grease composition comprising at least the following components: (A) an organopolysiloxane which is liquid at 25° C. and is represented by the following average compositional formula: R1aSiO(4-a)/2, where, R1 is a monovalent hydrocarbon group; and “a” is a number ranging from 1.8 to 2.2; (B) a thermally conductive filler composed of constituents (B1) to (B3) given below, wherein: constituent (B1) is spherical aluminum oxide powder with an average particle diameter ranging from 15 to 55 ?m; constituent (B2) is spherical aluminum oxide powder with an average particle diameter ranging from 2 to 10 ?m; constituent (B3) is aluminum oxide powder with an average particle size not exceeding 1 ?m; and (C) an alkoxysilyl-containing organopolysiloxane. The composition, along with high thermal conductivity, possesses excellent handleability and low coefficient of friction.
    Type: Grant
    Filed: June 16, 2011
    Date of Patent: December 16, 2014
    Assignee: Dow Corning Toray Co., Ltd.
    Inventors: Tomoko Kato, Kazumi Nakayoshi
  • Patent number: 8912302
    Abstract: A curable silicone composition for sealing an optical semiconductor element, comprising: (A) an organopolysiloxane that has at least two silicon-bonded vinyl groups in one molecule, that has C1-10 alkyl for the other silicon-bonded organic groups therein, and that lacks a siloxane unit represented by the following formula: SiO4/2; (B) an organopolysiloxane represented by an average unit formula; (C) an organopolysiloxane that has at least three silicon-bonded hydrogen atoms in one molecule, that has C1-10 alkyl for the silicon-bonded organic groups therein, and that contains from 0.7 to 1.6 mass % of silicon-bonded hydrogen atoms; and (D) a hydrosilylation reaction catalyst, wherein a viscosity at 25° C. and a viscosity at 100° C. of this composition lacking component (D) reside in a specific relationship, can efficiently perform resin sealing by transfer molding or compression molding while exhibiting an excellent moldability and can provide a cured product that has a low surface tack.
    Type: Grant
    Filed: September 18, 2012
    Date of Patent: December 16, 2014
    Assignee: Dow Corning Toray Co., Ltd.
    Inventors: Yusuke Miyamoto, Makoto Yoshitake
  • Patent number: 8895678
    Abstract: A cross-linkable silicone composition comprising at least the following components: (A) an organopolysiloxane represented by an average unit formula and containing phenyl and alkenyl groups; (B) an organopolysiloxane represented by a general formula and containing phenyl and alkenyl groups; (C) an organopolysiloxane having in one molecule at least one phenyl group and two silicon-bonded hydrogen atoms; and (D) a hydrosilylation catalyst, can be cross-linked by a hydrosilylation reaction and forms a solid body which has high hardness at room temperature and becomes significantly soft or a liquefied at high temperature.
    Type: Grant
    Filed: June 7, 2012
    Date of Patent: November 25, 2014
    Assignee: Dow Corning Toray Co., Ltd.
    Inventor: Makoto Yoshitake
  • Patent number: 8877860
    Abstract: A two-part curable liquid silicone rubber composition comprises a first liquid composition and a second liquid composition. The first and second liquid compositions are stored separately and yield, upon mixing, a silicone rubber forming composition. The silicone rubber composition comprises: (A) an alkenyl group-containing organopolysiloxane comprising (A-1) an organopolysiloxane having only a silicon-bonded alkenyl group at each molecular terminal and (A-2) an organopolysiloxane having from 1 to 4 silicon-bonded alkenyl groups in side molecular chains and containing not greater than 2.0 wt. % of alkenyl groups; (B) a calcium carbonate powder; (C) a hydrosilylation reaction catalyst; and (D) an organohydrogenpolysiloxane having silicon-bonded hydrogen atoms.
    Type: Grant
    Filed: March 28, 2012
    Date of Patent: November 4, 2014
    Assignee: Dow Corning Toray Co., Ltd.
    Inventors: Tomoko Tasaki, Yuichi Tsuji
  • Patent number: 8877886
    Abstract: To provide a method of producing a polyoxyalkylene-modified polysiloxane composition that is free of acid-mediated carbon-oxygen bond and silicon-oxygen bond cleavage, that is substantially deodorized and also does not generate odor with elapsed time, and that is therefore well suited for use in cosmetic applications, e.g., for hair cosmetics, skin cosmetics, and so forth. A production method of this invention is characterized by removing the odor-causing substance from a polyoxyalkylene-modified polysiloxane composition that has been synthesized by a hydrosilylation reaction, by subjecting the polyoxyalkylene-modified polysiloxane composition to a hydrolysis treatment in the presence of an acidic inorganic salt that is a solid at 25° C. and gives a specific pH at 25° C. in aqueous solution; for example, potassium hydrogensulfate.
    Type: Grant
    Filed: December 2, 2010
    Date of Patent: November 4, 2014
    Assignee: Dow Corning Toray Co., Ltd.
    Inventors: Tatsuo Souda, Seiki Tamura
  • Patent number: 8859693
    Abstract: A curable silicone composition comprises (A) (A-1) a dialkylpolysiloxane that has at least two alkenyl groups in each molecule and a viscosity of at least 1,000 mPa·s to not more than 50,000 mPa·s and (A-2) an alkenyl-containing, resin-form organopolysiloxane that comprises the SiO4/2 unit, R12R2SiO1/2 unit, and R13SiO1/2 unit wherein R1 is alkyl and R2 is alkenyl and that contains the alkenyl group in the range from at least 0.5 mass % to less than 3.5 mass %; (B) an organopolysiloxane that has at least three silicon-bonded hydrogen atoms; and (C) a hydrosilylation reaction catalyst. The curable composition provides a highly transparent cured silicone material that has a hardness in the range from at least 30 to not more than 80, a parallel light transmittance at 25° C. of at least 90%, and a parallel light transmittance at 200° C. that is at least 99% of the parallel light transmittance at 25° C.
    Type: Grant
    Filed: January 29, 2010
    Date of Patent: October 14, 2014
    Assignee: Dow Corning Toray Co., Ltd.
    Inventors: Chiichiro Hasegawa, Makoto Yoshitake, Hiroshi Akitomo
  • Patent number: 8853332
    Abstract: A curable silicone composition comprises (A) (A-1) an alkenyl-containing dialkylpolysiloxane and a viscosity of at least 1,000 mPa·s to not more than 20,000 mPa·s and (A-2) an alkenyl-containing, resin-form organopolysiloxane that comprises the SiO4/2 unit, R12R2SiO1/2 unit, and R13SiO1/2 unit wherein R1 is alkyl and R2 is alkenyl, that contains from 2.5 to 5.0 mass % alkenyl group, and that has a ratio for the total number of moles of R12R2SiO1/2 and R13SiO1/2 units to 1 mole of the SiO4/2 unit in the range from 0.70 to 1.10; (B) an organopolysiloxane that contains at least 0.9 mass % silicon-bonded hydrogen; and (C) a hydrosilylation reaction catalyst. The curable composition provides a bending-tolerant and highly transparent cured silicone material that has a hardness in the range from 80 to 95, and a parallel light transmittance at 200° C. of a value that is at least 99% of the parallel light transmittance at 25° C.
    Type: Grant
    Filed: January 29, 2010
    Date of Patent: October 7, 2014
    Assignee: Dow Corning Toray Co., Ltd.
    Inventors: Chiichiro Hasegawa, Makoto Yoshitake, Hiroshi Akitomo
  • Patent number: 8846828
    Abstract: A curable organopolysiloxane composition comprising: (A) a branched-chain organopolysiloxane that contains in one molecule at least three alkenyl groups and at least 30 mole % of all silicon-bonded organic groups in the form of aryl groups; (B) a linear-chain organopolysiloxane that contains aryl groups and has both molecular terminals capped with diorganohydrogensiloxy groups; (C) a branched-chain organopolysiloxane that contains in one molecule at least three diorganohydrogensiloxy groups and at least 15 mole % of all silicon-bonded organic groups in the form of aryl groups; and (D) a hydrosilylation catalyst. The composition is capable of forming a cured body that has a high index of refraction and strong adhesion to substrates.
    Type: Grant
    Filed: June 11, 2009
    Date of Patent: September 30, 2014
    Assignee: Dow Corning Toray Co. Ltd.
    Inventors: Takashi Sagawa, Makoto Yoshitake
  • Patent number: 8835555
    Abstract: The present invention has an objective to easily obtain an emulsion exhibiting superior storage stability, and in particular, an emulsion of a polyorganosiloxane. The present invention provides a method for producing an emulsion characterized by obtaining an emulsion by emulsifying a mixture of an oil and a surfactant, obtained by synthesizing the surfactant in the oil. In particular, the method is suitably used for the preparation of an emulsion of an organopolysiloxane (A) which is usually difficult to be stably emulsified. A silicone-based surfactant (B), and in particular, a silicone-based surfactant having a small degree of polymerization of a siloxane chain such as a trisiloxane is synthesized in an oil. Thereby, an emulsion exhibiting superior storage stability can be produced.
    Type: Grant
    Filed: December 21, 2009
    Date of Patent: September 16, 2014
    Assignee: Dow Corning Toray Co. Ltd.
    Inventors: Kazuhiko Kojima, Tsutomu Naganawa, Asao Harashima
  • Patent number: 8829141
    Abstract: This invention relates to a silicone oil emulsion that contains cross-linked silicone particles in drops of silicone oil which have an average particle diameter of 0.1 to 500 ?m and are dispersed in water, wherein the silicone oil contains epoxy groups, acryl groups, methacryl groups, silicon-bonded alkoxy groups, or silicon-bonded hydroxyl groups but is free of silicon-bonded hydrogen atoms and alkenyl groups, said cross-linked silicone particles is formed by a hydrosilation reaction. Furthermore, this invention also relates to a silicone oil composition obtained by removing water from said emulsion.
    Type: Grant
    Filed: September 14, 2010
    Date of Patent: September 9, 2014
    Assignee: Dow Corning Toray Co., Ltd.
    Inventors: Yoshitsugu Morita, Kazuo Kobayashi