Patents by Inventor Yasuaki Ii

Yasuaki Ii 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).

  • Maleimide-based copolymer and resin composition comprising the same
    Patent number: 5948879
    Abstract: A maleimide-based copolymer containing maleimide monomer units (a-1), aromatic vinyl monomer units (a-2) and other vinyl monomer units (a-3), wherein,(I) the content of residual maleimide monomer in the copolymer is 0.1% by weight or less, and the content of whole volatiles other than the maleimide monomer is 0.5% by weight or less;(II) a compound obtained from at least one monomer selected from the group consisting of a maleimide monomer, an aromatic vinyl monomer and other vinyl monomers, having a weight-average molecular weight of from 200 to 1,000, is contained in an amount of 2 to 10% by weight;(III) the copolymer has a yellow index of 30 or less; and(IV) the copolymer has an intrinsic viscosity of from 0.3 to 1.5.
    Type: Grant
    Filed: October 24, 1997
    Date of Patent: September 7, 1999
    Assignee: Mitsubishi Rayon Co., Ltd.
    Inventors: Hiroshi Mori, Yasuaki Ii, Hisaya Yokohama, Yasunori Tsuneshige, Seizo Fujii, Takanori Nakazato
  • Thermoplastic resin composition of ethylene-propylene-non-conjugated diene terpolymer rubber having improved combined properties of weather resistance and molding appearance
    Patent number: 4788250
    Abstract: Disclosed is a thermoplastic resin composition comprising a graft polymer resin (I) obtained by polymerizing one or more monomers (b) selected from the group consisting of aromatic vinyl compounds and ethylenically unsaturated compounds, in the presence of a latex of an ethylene-propylene-non-conjugated diene terpolymer rubber (a) having a specific gel content and a specific particle diameter, so that the graft polymer resin contains a specific proportion of the rubber (a); and a rigid thermoplastic resin (II). This resin composition has excellent weather resistance and impact resistance, and yields molded articles having a good surface gloss.
    Type: Grant
    Filed: October 8, 1987
    Date of Patent: November 29, 1988
    Assignee: Mitsubishi Rayon Co., Ltd.
    Inventors: Haruyoshi Kitahara, Yasuaki Ii, Yutaka Toyooka
  • Intermediate for composite materials
    Patent number: 4767805
    Abstract: An intermediate for a composite material is disclosed. The intermediate is obtained by impregnating an epoxy resin composition containing a specific additive into a carbon fiber. The composite material obtained from the intermediate has improved mechanical properties.
    Type: Grant
    Filed: February 9, 1987
    Date of Patent: August 30, 1988
    Assignee: Mitsubishi Rayon Co., Ltd.
    Inventors: Hisashi Tada, Akira Agata, Yasuaki Ii
  • Composite material with improved properties
    Patent number: 4720516
    Abstract: A polyolefin resin composition comprising a polyolefin modified with an unsaturated carboxylic acid, at least one member selected from the group consisting of polyepoxides, polyisocyanates, and polyamines, and a reinforcement.
    Type: Grant
    Filed: December 16, 1982
    Date of Patent: January 19, 1988
    Assignee: Mitsubishi Rayon Co., Ltd.
    Inventors: Kazuo Kishida, Isao Sasaki, Hiroshi Mori, Yasuaki Ii
  • Composite material with improved properties
    Patent number: 4550130
    Abstract: A polyolefin resin composition comprising a polyolefin modified with an unsaturated carboxylic acid, at least one member selected from the group consisting of polyepoxides, polyisocyanates, and polyamines, and a reinforcement.
    Type: Grant
    Filed: February 28, 1984
    Date of Patent: October 29, 1985
    Assignee: Mitsubishi Rayon Co., Ltd.
    Inventors: Kazuo Kishida, Isao Sasaki, Hiroshi Mori, Yasuaki Ii
  • Modified polyolefin composite material with improved properties
    Patent number: 4507423
    Abstract: A polyolefin resin composition comprising a modified polyolefin prepared by reacting a polyolefin with an unsaturated carboxylic acid in the presence of a catalyst including at least one member selected from the group consisting of ketal peroxides and dialkyl peroxides having a decomposition temperature necessary for attaining the half life of 10 hours of at least 80.degree. C., and a fibrous, powdery, or flaky reinforcement.
    Type: Grant
    Filed: December 16, 1982
    Date of Patent: March 26, 1985
    Assignee: Mitsubishi Rayon Co., Ltd.
    Inventors: Isao Sasaki, Yasuaki Ii, Hiroshi Mori
  • Intermediate for composite materials
    Patent number: RE33965
    Abstract: An intermediate for a composite material is disclosed. The intermediate is obtained by impregnating an epoxy resin composition containing a specific additive into a carbon fiber. The composite material obtained from the intermediate has improved mechanical properties.
    Type: Grant
    Filed: June 21, 1989
    Date of Patent: June 16, 1992
    Assignee: Mitsubishi Rayon Co., Ltd.
    Inventors: Hisashi Tada, Akira Agata, Yasuaki Ii