Patents by Inventor Yasuo Kaneshima

Yasuo Kaneshima 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).

  • Adhesives
    Patent number: 5569703
    Abstract: An adhesive comprising an aqueous emulsion of a copolymer containing an ethylene unit (A), a vinyl ester unit (B), and an acetoacetyl group-containing copolymerizable monomer unit (C) in a weight ratio of (A)/(B)/(C)=(5 to 70)/100/(0.1 to 10).
    Type: Grant
    Filed: March 14, 1995
    Date of Patent: October 29, 1996
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Yuuzi Yoshii, Yasuo Kaneshima, Masayoshi Nitta, Tatsuhiko Amano
  • Vinyl acetate-ethylene copolymer emulsion and process for producing the same
    Patent number: 5110856
    Abstract: A vinyl acetate-ethylene copolymer emulsion is disclosed, comprising a vinyl acetate-ethylene copolymer composed of from 10 to 40% by weight of an ethylene unit and from 90 to 60% by weight of a vinyl acetate unit and an emulsifying dispersant in an amount of from 2.5 parts by weight or more but less than 5.0 parts by weight per 100 parts by weight of the vinyl acetate unit, and having a mean particle size of not larger than 0.9 .mu.m and a solids content of from 65 to 75% by weight, wherein the emulsifying dispersant contains from 1.0 to 1.9 parts by weight of partially saponified polyvinyl alcohol prepared so as to have an average polymerization degree of from 300 to 1,000 and from 1.0 to 3.0 parts by weight of a polyoxyethylene nonionic surface active agent having an HLB of from 16.5 to 17.5 per 100 parts by weight of the vinyl acetate unit. A process for producing the vinyl acetate-ethylene copolymer is also disclosed.
    Type: Grant
    Filed: September 17, 1991
    Date of Patent: May 5, 1992
    Assignee: Sumitomo Chemical Co., Ltd.
    Inventors: Takeo Oyamada, Yoshito Taira, Masayoshi Nitta, Yasuo Kaneshima, Tateshi Kurino, Shizuo Narisawa
  • Vinyl acetate-ethylene copolymer emulsion and process for producing the same
    Patent number: 5070134
    Abstract: A vinyl acetate-ethylene copolymer emulsion is disclosed, comprising a vinyl acetate-ethylene copolymer composed of from 10 to 40% by weight of an ethylene unit and from 90 to 60% by weight of a vinyl acetate unit and an emulsifying dispersant in an amount of from 2.5 parts by weight or more but less than 5.0 parts by weight per 100 parts by weight of the vinyl acetate unit, and having a mean particle size of not larger than 0.9 .mu.m and a solids content of from 65 to 75% by weight, wherein the emulsifying dispersant contains from 1.0 to 1.9 parts by weight of partially saponified polyvinyl alcohol prepared so as to have an average polymerization degree of from 300 to 1,000 and from 1.0 to 3.0 parts by weight of a polyoxyethylene nonionic surface active agent having an HLB of from 16.5 to 17.5 per 100 parts by weight of the vinyl acetate unit. A process for producing the vinyl acetate-ethylene copolymer is also disclosed.
    Type: Grant
    Filed: February 28, 1990
    Date of Patent: December 3, 1991
    Assignee: Sumitomo Chemical Co., Ltd.
    Inventors: Takeo Oyamada, Yoshito Taira, Masayoshi Nitta, Yasuo Kaneshima, Tateshi Kurino, Shizuo Narisawa