Patents by Inventor Kuniyoshi Asano

Kuniyoshi Asano 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: 5278229
    Abstract: A polyolefin resin composition comprising(A) 50 to 99.5 weight % of a polyolefin resin,(B) 0.4 to 50 weight % of a saponified ethylenevinyl acetate copolymer, and(C) 0.1 to 15 weight % of a graft polymer obtainable by grafting an ethylenically unsaturated carboxylic acid or a derivative thereof to a polyolefin resin and reacting the adduct with a polyamide oligomer or polyamide, which composition satisfies the relation: M.sub.2 /M.sub.1 =not less than 1.5 wherein M.sub.2 and M.sub.1 are the melt flow rates of (B) and (A), respectively, under a load of 2160 g at 210 C. The present invention is predicated on the above finding.
    Type: Grant
    Filed: January 31, 1991
    Date of Patent: January 11, 1994
    Assignee: Nippon Gohsei Kagaku Kogyo Kabushiki Kaisha
    Inventors: Kuniyoshi Asano, Tomoyoshi Uemura, Hiroshi Takida
  • Patent number: 5160475
    Abstract: A method of producing shaped articles having excellent impact resistance which includes melt-molding a composition derived from a saponified ethylene-vinyl acetate copolymer (A) by incorporating therein an ethylene-propylene copolymer elastomer (B) and a graft polymer (C) obtained by grafting an ethylenically unsaturated carboxylic acid or a derivative thereof to a polyolefin resin and reacting the resulting grafting product further with a polyamide oligomer or polyamide.
    Type: Grant
    Filed: January 31, 1991
    Date of Patent: November 3, 1992
    Assignee: Nippon Gohsei Kagaku Kogyo Kabushiki Kaisha
    Inventors: Kuniyoshi Asano, Tomoyoshi Uemura, Hiroshi Takida
  • Patent number: 5023296
    Abstract: A resin composition comprising(A) 100 parts by weight of a hydrolyzed eithylene-vinyl acetate copolymer,(B) 1 to 100 parts by weight of a polyester resin and(C) 0.1 to 50 parts by weight of a polyester-amide resin The composition is excellent in impact strength and flex crack resistance.
    Type: Grant
    Filed: December 19, 1989
    Date of Patent: June 11, 1991
    Assignee: Nippon Gohsei Kagaku Kogyo Kabushiki Kaisha
    Inventors: Takamasa Moriyama, Kuniyoshi Asano
  • Patent number: 4904723
    Abstract: A composition comprising(1) a hydrolyzed ethylene-vinyl acetate copolymer having an ethylene content of 20 to 60% by mole and a degree of hydrolysis in the vinyl acetate component of at least 95% by mole and(2) a secondary or tertiary alkali metal phosphate; the alkali metal content being from 15 to 250 ppm of the hydrolyzed copolymer (1) and the phosphorus content being from 5 to 70 ppm of the hydrolyzed copolymer (1). The composition of the invention is excellent in adhesive strength to unsaturated carboxylic acid-modified polyolefins, and therefore the laminate having the structure the polyolefin layer/the unsaturated carboxylic acid-modified polyolefin layer/the hydrolyzed ethylene-vinyl acetate copolymer composition of the invention layer has excellent adhesive strength between the unsaturated carboxylic acid-modified polyolefin layer and the layer of the composition of the present invention.
    Type: Grant
    Filed: August 26, 1988
    Date of Patent: February 27, 1990
    Assignee: Nippon Gohsei Kagaku Kogyo Kabushiki Kaisha
    Inventors: Tomoyoshi Uemura, Shinji Okamoto, Takamasa Moriyama, Kuniyoshi Asano, Hiroshi Takida
  • Patent number: 4883696
    Abstract: A laminate comprising a layer of a composition (A) of 100 parts by weight of a hydrolyzed ethylene-vinyl acetate copolymer having an ethylene content of 20 to 55% by mole and a degree of hydrolysis of at least 90% by mole and 1 to 100 parts by weight of a thermoplastic polyester having a glass transition temperature of -50.degree. to 25.degree. C. and a heat of fusion of not more than 30 joules/g, the acid component of the polyester being a mixture of 20 to 70% by mole of an aromatic dicarboxylic acid and 80 to 30% by mole of an aliphatic dicarboxylic acid, and the glycol component of the polyester being an alkylene glycol having 2 to 6 carbon atoms; and a layer of a composition (B) of at least one polymer selected from the group consisting of a polyolefin, a polystyrene, a polyvinyl chloride, a polyamide, a polycarbonate and a polyester having a glass transition temperature of not less than 30.degree. C.
    Type: Grant
    Filed: November 21, 1988
    Date of Patent: November 28, 1989
    Assignee: Nippon Gohsei Kaguku Kogyo Kabushikis Kaisha
    Inventors: Teruo Iwanami, Takamasa Moriyama, Kuniyoshi Asano
  • Patent number: 4847361
    Abstract: A process for preparing pellets of a hydrolyzed ethylene-vinyl acetate copolymer which comprises extruding a solution of a hydrolyzed ethylene-vinyl acetate copolymer in methanol or a mixture of water and methanol into a coagulating liquid in the form of a strand, and cutting the strand into pellets, the coagulating liquid consisting essentially of an organic solvent having a boiling point of not more than 100.degree. C., and being compatible with methanol but not being capable of dissolving the hydrolyzed ethylene-vinyl acetate copolymer. According to the present invention, the pellets from which impurities such as sodium acetate can be efficiently removed, and which have excellent thermal stability and moldability can be obtained in high productivity.
    Type: Grant
    Filed: February 22, 1988
    Date of Patent: July 11, 1989
    Assignee: Nippon Gohsei Kagaku Kogyo Kabushiki Kaisha
    Inventors: Kuniyoshi Asano, Yasunori Miyamoto