Patents by Inventor Kousaku Tao

Kousaku Tao 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).

  • Patent number: 11608402
    Abstract: A graft copolymer (B) produced by graft polymerization of a vinyl monomer mixture (m1) including an alkyl (meth)acrylate ester onto a copolymer (A), the copolymer (A) being a copolymer of an alkyl (meth)acrylate ester (Aa) and a (meth)acrylate ester (Ab) including an aromatic hydrocarbon group. A thermoplastic resin composition including the graft copolymer (B), a copolymer (C) that is the product of a polymerization reaction of a vinyl monomer mixture (m2) including an alkyl (meth)acrylate ester, and a molded article produced by molding the thermoplastic resin composition. Provided are the graft copolymer with which a thermoplastic resin composition excellent in terms of transparency, impact resistance, weather resistance, and flowability may be produced, a thermoplastic resin composition including the graft copolymer, and the molded article produced by molding the thermoplastic resin composition.
    Type: Grant
    Filed: October 11, 2019
    Date of Patent: March 21, 2023
    Assignee: TECHNO-UMG CO., LTD.
    Inventors: Kousaku Tao, Yoshitaka Naitoh, Yuuki Taguchi
  • Publication number: 20210340298
    Abstract: A graft copolymer (B) produced by graft polymerization of a vinyl monomer mixture (m1) including an alkyl (meth)acrylate ester onto a copolymer (A), the copolymer (A) being a copolymer of an alkyl (meth)acrylate ester (Aa) and a (meth)acrylate ester (Ab) including an aromatic hydrocarbon group. A thermoplastic resin composition including the graft copolymer (B), a copolymer (C) that is the product of a polymerization reaction of a vinyl monomer mixture (m2) including an alkyl (meth)acrylate ester, and a molded article produced by molding the thermoplastic resin composition. Provided are the graft copolymer with which a thermoplastic resin composition excellent in terms of transparency, impact resistance, weather resistance, and flowability may be produced, a thermoplastic resin composition including the graft copolymer, and the molded article produced by molding the thermoplastic resin composition.
    Type: Application
    Filed: October 11, 2019
    Publication date: November 4, 2021
    Inventors: Kousaku TAO, Yoshitaka NAITOH, Yuuki TAGUCHI
  • Publication number: 20200216595
    Abstract: According to the present invention, a polymer is provided capable of obtaining a graft polymer having a high graft ratio while having a low degree of crosslinking, a graft polymer having a high graft ratio, which is suitable as a material of a thermoplastic resin composition capable of obtaining a molded article excellent in impact resistance, surface appearance, and thermal stability, and a thermoplastic resin composition capable of obtaining a molded article excellent in impact resistance, surface appearance, and thermal stability. A polymer obtained by polymerizing a mixture containing an (Aa) component and an (Ab) component is used. The (Aa) component is an acrylic acid ester. The (Ab) component is a branched polyfunctional compound having two or more allyl groups, and all carbon-carbon double bonds contained in the polyfunctional compound are derived from the allyl groups.
    Type: Application
    Filed: June 29, 2018
    Publication date: July 9, 2020
    Inventors: Yoshitaka Naito, Kousaku Tao, Yuki Taguchi
  • Patent number: 9896579
    Abstract: A thermoplastic resin composition of the present invention contains a graft copolymer (B) obtained by polymerizing a vinyl-based monomer component (m1) in the presence of a composite rubber polymer (A) formed from a polyorganosiloxane (Aa) and a poly(meth)acrylate ester (Ab), and a (meth)acrylate ester resin (C) obtained by polymerizing a vinyl-based monomer component (m2), wherein the amount of the polyorganosiloxane (Aa) relative to the total mass (100% by mass) of the composite rubber polymer (A) is from 1 to 20% by mass, the volume average particle size of the composite rubber polymer (A) is from 0.05 to 0.15 ?m, and relative to the total mass (100% by mass) of the vinyl-based monomer component (m2), the amount of the maleimide-based compound is from 1 to 30% by mass, and the amount of the aromatic vinyl compound is from 5.5 to 15% by mass.
    Type: Grant
    Filed: July 6, 2015
    Date of Patent: February 20, 2018
    Assignee: UMG ABS, LTD.
    Inventors: Takashi Iwanaga, Kousaku Tao, Nobutaka Hase
  • Patent number: 9688940
    Abstract: [Object] To provide lubricating thermoplastic resin compositions that can give formed articles exhibiting excellent lubricating properties and surface appearance and maintaining the lubricating properties permanently. [Solution] The lubricating thermoplastic resin composition includes an acid-modified copolymer (A) of a monomer mixture including an aromatic vinyl and a vinyl cyanide, the copolymer having a carboxyl group in the molecular chain, and a functionalized lubricant (B) having, in the molecule, a functional group (B1) capable of reacting with the carboxyl group and a lubricating segment (B2) having lubricating properties. The composition may further include a graft copolymer (C) and/or an additional thermoplastic resin (D) other than the acid-modified copolymer (A).
    Type: Grant
    Filed: April 5, 2013
    Date of Patent: June 27, 2017
    Assignee: UMG ABS, LTD.
    Inventors: Yoshitaka Naitoh, Kousaku Tao, Tomonori Takase, Risa Nii, Yoshiaki Shinohara, Keiichi Yagi, Nobutaka Hase
  • Patent number: 9657169
    Abstract: This graft copolymer is obtainable by polymerization of a vinyl-based monomer mixture (m1) including an aromatic vinyl compound and a vinyl cyanide compound, in the presence of: an ethylene.?-olefin copolymer (A) which has a mass average molecular weight (Mw) of 17×104 to 35×104 and a distribution of molecular weight (Mw/Mn) of 1 to 3; or a cross-linked ethylene.?-olefin copolymer (C) obtainable by cross-linking treatment of the ethylene.?-olefin copolymer (A).
    Type: Grant
    Filed: February 14, 2014
    Date of Patent: May 23, 2017
    Assignees: UMG ABS, LTD., Mitsubishi Rayon Co., Ltd.
    Inventors: Kousaku Tao, Risa Nii, Yoshiaki Shinohara, Nobutaka Hase
  • Publication number: 20170137620
    Abstract: A thermoplastic resin composition of the present invention contains a graft copolymer (B) obtained by polymerizing a vinyl-based monomer component (m1) in the presence of a composite rubber polymer (A) formed from a polyorganosiloxane (Aa) and a poly(meth)acrylate ester (Ab), and a (meth)acrylate ester resin (C) obtained by polymerizing a vinyl-based monomer component (m2), wherein the amount of the polyorganosiloxane (Aa) relative to the total mass (100% by mass) of the composite rubber polymer (A) is from 1 to 20% by mass, the volume average particle size of the composite rubber polymer (A) is from 0.05 to 0.15 ?m, and relative to the total mass (100% by mass) of the vinyl-based monomer component (m2), the amount of the maleimide-based compound is from 1 to 30% by mass, and the amount of the aromatic vinyl compound is from 5.5 to 15% by mass.
    Type: Application
    Filed: July 6, 2015
    Publication date: May 18, 2017
    Applicant: UMG ABS, LTD.
    Inventors: Takashi IWANAGA, Kousaku TAO, Nobutaka HASE
  • Publication number: 20150376395
    Abstract: This graft copolymer is obtainable by polymerization of a vinyl-based monomer mixture (m1) including an aromatic vinyl compound and a vinyl cyanide compound, in the presence of: an ethylene.?-olefin copolymer (A) which has a mass average molecular weight (Mw) of 17×104 to 35×104 and a distribution of molecular weight (Mw/Mn) of 1 to 3; or a cross-linked ethylene.?-olefin copolymer (C) obtainable by cross-linking treatment of the ethylene.?-olefin copolymer (A).
    Type: Application
    Filed: February 14, 2014
    Publication date: December 31, 2015
    Applicants: UMG ABS, LTD., MITSUBISHI RAYON CO., LTD.
    Inventors: Kousaku TAO, Risa NII, Yoshiaki SHINOHARA, Nobutaka HASE
  • Publication number: 20150057201
    Abstract: [Object] To provide lubricating thermoplastic resin compositions that can give formed articles exhibiting excellent lubricating properties and surface appearance and maintaining the lubricating properties permanently. [Solution] The lubricating thermoplastic resin composition includes an acid-modified copolymer (A) of a monomer mixture including an aromatic vinyl and a vinyl cyanide, the copolymer having a carboxyl group in the molecular chain, and a functionalized lubricant (B) having, in the molecule, a functional group (B1) capable of reacting with the carboxyl group and a lubricating segment (B2) having lubricating properties. The composition may further include a graft copolymer (C) and/or an additional thermoplastic resin (D) other than the acid-modified copolymer (A).
    Type: Application
    Filed: April 5, 2013
    Publication date: February 26, 2015
    Applicant: UMG ABS, LTD.
    Inventors: Yoshitaka Naitoh, Kousaku Tao, Tomonori Takase, Risa Nii, Yoshiaki Shinohara, Keiichi Yagi, Nobutaka Hase