Patents by Inventor Yasunori Kawachi

Yasunori Kawachi 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: 5338804
    Abstract: Disclosed is a methacrylic resin cast plate which is comprised of 100 parts by weight of [I] polymethyl methacrylate or a methyl methacrylate copolymer containing at least 90% by weight of methyl methacrylate units and, dispersed therein, a graft copolymer [IV] obtained by graft-polymerizing a hard resin component [III] containing at least 90% by weight of methyl methacrylate units onto a crosslinked rubbery copolymer [II] containing at least 45% by weight of butyl acrylate units and having an average particle diameter of 0.1 to 1 .mu.m, the amount of the graft copolymer [IV] being 2 to 30 parts by weight as the amount of the crosslinked rubbery copolymer.The methacrylic resin cast plate has a high transparency and impact resistance.
    Type: Grant
    Filed: July 17, 1992
    Date of Patent: August 16, 1994
    Assignee: Mitsubishi Rayon Company, Inc.
    Inventors: Akihiro Toritani, Suehiro Tayama, Yasunori Kawachi
  • Patent number: 5169903
    Abstract: Disclosed is a methacrylic resin cast plate which is comprised of 100 parts by weight of [I] polymethyl methacrylate or a methyl methacrylate copolymer containing at least 90% by weight of methyl methacrylate units and, dispersed therein, a graft copolymer [IV] obtained by graft-polymerizing a hard resin component [III] containing at least 90% by weight of methyl methacrylate units onto a crosslinked rubbery copolymer [II] containing at least 45% by weight of butyl acrylate units and having an average particle diameter of 0.1 to 1 .mu.m, the amount of the graft copolymer [IV] being 2 to 30 parts by weight as the amount of the crosslinked rubbery copolymer.
    Type: Grant
    Filed: April 3, 1991
    Date of Patent: December 8, 1992
    Assignee: Mitsubishi Rayon Company Ltd.
    Inventors: Akihiro Toritani, Suehiro Tayama, Yasunori Kawachi
  • Patent number: 4690986
    Abstract: A polyorganosiloxane-based high-impact thermoplastic graft copolymer superior in impact resistance, light resistance, surface gloss and color fastness produced by the emulsion graft polymerization of at least one vinyl monomer on an emulsion-polymerized polyorganosiloxane which consists of90 to 99.8 mole % of an organosiloxane unit represented by the formulaR'.sub.2 SiO.sub.2/2 (I)wherein R' is the same or different and denotes methyl, ethyl, propyl, or phenyl,0.1 to 10 mole % of a unit derived from a graft-linking agent, said unit being represented by the formula ##STR1## wherein; R.sup.2 denotes methyl, ethyl, propyl, or phenyl; n denotes a number of 0, 1, and 2; and p denotes a number of 1 to 6, and0.1 to 10 mole % of a unit derived from a tetrafunctional silane crosslinking agent, said unit being represented by the formulaSiO.sub.
    Type: Grant
    Filed: September 8, 1986
    Date of Patent: September 1, 1987
    Assignees: Mitsubishi Rayon Co., Ltd., Shin-Etsu, Chemical Co., Ltd.
    Inventors: Isao Sasaki, Akira Yanagase, Yasunori Kawachi, Tetsuya Mayuzumi, Toshio Oba, Fumio Okada
  • Patent number: 4673688
    Abstract: There is disclosed a blood anticoagulant consisting essentially of a salt formed by reacting ethylenediaminetetraacetic acid with an alkylenediamine having 2 to 8 carbon atoms in a molar ratio of ethylenediaminetetraacetic acid to alkylenediamine ranging from 1:0.5 to 1:2, or with an alkylamine having 1 to 8 carbon atoms in a molar ratio of ethylenediaminetetraacetic acid to alkylamine ranging from 1:1 to 1:3. This blood anticoagulant is suitable for preventing coagulation of blood collected for purpose of hematological examination.
    Type: Grant
    Filed: October 2, 1986
    Date of Patent: June 16, 1987
    Assignee: Mitsubishi Rayon Co., Ltd.
    Inventors: Yoshio Murashige, Akira Yanagase, Yasunori Kawachi, Junko Soga
  • Patent number: 4639339
    Abstract: There is disclosed a blood anticoagulant consisting essentially of a sulfonated polyethyleneimine formed by sulfonating 1 mole % or more of the --NH-- and --NH.sub.2 groups present in a polyethyleneimine having a molecular weight of 300 or greater. This blood anticoagulant is suitable for preventing coagulation of blood collected for purpose of hematological examination.
    Type: Grant
    Filed: October 15, 1985
    Date of Patent: January 27, 1987
    Assignee: Mitsubishi Rayon Co., Ltd.
    Inventors: Yoshio Murashige, Akira Yanagase, Yasunori Kawachi, Junko Soga
  • Patent number: 4528330
    Abstract: Disclosed is a resin composition which is usable for an exterior article without being coated on its surface when molded into the article and is excellent in the color tone and has good impact resistance and weatherability, said composition comprising (I) 10 to 70% by weight of a high-rubber-content graft polymer obtained by polymerizing 50 to 10% by weight of a monomer mixture (C) comprising 10 to 90% by weight of at least one aromatic vinyl monomer and 90 to 10% by weight of at least one ethylenically unsaturated monomer represented by the following general formula:CH.sub.2 .dbd.CRXwherein R stands for a hydrogen atom or methyl group, and X stands for a group --CN or --COOR.sub.1 in which R.sub.1 stands for an alkyl group having 1 to 8 carbon atoms,in the presence of a latex of a multi-layer crosslinked acrylic rubber particles containing 5 to 30% by weight of a rigid crosslinked resin (A) having a core particle size of 0.15 to 0.45.mu.
    Type: Grant
    Filed: November 1, 1982
    Date of Patent: July 9, 1985
    Assignee: Mitsubishi Rayon Co., Ltd.
    Inventors: Kazuo Kishida, Akira Hasegawa, Yasunori Kawachi, Hiroshi Kawasaki, Hiroshi Mizukoshi
  • Patent number: 4526929
    Abstract: Disclosed is a resin composition which is usable for an exterior article without being coated on its surface when molded into the article and is excellent in the color tone and has good impact resistance and weatherability, said composition comprising (I) 10 to 70% by weight of a high-rubber-content graft polymer obtained by polymerizing 50 to 10% by weight of a monomer mixture (C) comprising 10 to 90% by weight of at least one aromatic vinyl monomer and 90 to 10% by weight of at least one ethylenically unsaturated monomer represented by the following general formula:CH.sub.2 .dbd.CRXwherein R stands for a hydrogen atom or methyl group, and X stands for a group --CN or --COOR.sub.1 in which R.sub.1 stands for an alkyl group having 1 to 8 carbon atoms, in the presence of a latex of a multi-layer crosslinked acrylic rubber particles containing 5 to 30% by weight of a rigid crosslinked resin (A) having a core particle size of 0.15 to 0.40.mu.
    Type: Grant
    Filed: July 20, 1981
    Date of Patent: July 2, 1985
    Assignee: Mitsubishi Rayon Company, Limited
    Inventors: Kazuo Kishida, Akira Hasegawa, Yasunori Kawachi, Hiroshi Kawasaki, Hiroshi Mizukoshi
  • Patent number: 4351921
    Abstract: A resin composition for use in uncoated exterior materials markedly excellent in appearance and having high impact resistance and weather resistance wherein 10-70% by weight of a graft copolymer (I) having a high rubber content, 90-30% by weight of a rigid thermoplastic resin (II) comprising 10-90% by weight of at least one aromatic vinyl monomer and 90-10% by weight of at least one ethylenic unsaturated monomer having the following general formula:CH.sub.2 =CRXwherein R represents hydrogen or CH.sub.3 group and X represents CN or COOR.sub.1 group (R.sub.
    Type: Grant
    Filed: December 29, 1980
    Date of Patent: September 28, 1982
    Assignee: Mitsubishi Rayon Co., Ltd.
    Inventors: Kazuo Kishida, Akira Hasegawa, Yasunori Kawachi
  • Patent number: 4347203
    Abstract: An acrylic fiber having linen- or cotton-like feeling, dry feeling, a high hygroscopicity and a high water retentivity, which is characterized in that said fiber is covered on the outside with creases running along the fiber axis, adjacent creases being 0.1 to 5.mu. apart on the average; has in any of its cross-sections two or more macrovoids, 2.mu. or more in major diameter, which extend in the direction of fiber axis; and said fiber has 30 to 150 microcrimps per 25 mm of fiber length. A method for producing such a fiber is also disclosed.
    Type: Grant
    Filed: May 22, 1980
    Date of Patent: August 31, 1982
    Assignee: Mitsubishi Rayon Company, Ltd.
    Inventors: Koji Mimura, Yasunori Kawachi, Atsushi Kawai