Patents Assigned to Kurarav Co., Ltd.
  • Patent number: 5302417
    Abstract: An aqueous dispersion comprising a dispersoid of an ethylene-vinyl alcohol copolymer having an ethylene content of 15 to 65 mole % and a dispersion stabilizer of a saponified product of an ethylene-vinyl ester copolymer having an ionic group and having an ethylene content of 10 to 70 mole % and a saponification degree of at least 80%. According to the present invention, aqueous dispersions with high solid concentration and having excellent stability during storage or upon use. The film obtained by applying and then drying the aqueous dispersion has excellent gas barrier properties.
    Type: Grant
    Filed: August 9, 1993
    Date of Patent: April 12, 1994
    Assignee: Kurarav Co., Ltd.
    Inventors: Junnosuke Yamauchi, Akimasa Aoyama, Toshio Tsuboi, Satoshi Hirofuji, Takeshi Moritani
  • Patent number: 4810581
    Abstract: An adhesive resin composition useful for bonding a resin having gas barrier properties and a hydrophobic thermoplastic resin which comprises an ethylene-acrylate or methacrylate copolymer grafted with an ethylenic unsaturated carboxylic acid or its acid anhydride; and 0.02 to 0.6 equivalent to the ethylenic unsaturated carboxylic acid or its acid anhydride of a periodic table group Ia or IIa metal hydroxide, or said metal hydroxide and an ethylene-acrylate or methacrylate copolymer. A laminated material of a resin having gas barrier properties and a hydrophobic thermoplastic resin laminated with the adhesive resin composition and a resin composition comprising the adhesive resin composition, a resin having gas barrier properties and a hydrophobic thermoplastic resin are also disclosed.
    Type: Grant
    Filed: July 19, 1988
    Date of Patent: March 7, 1989
    Assignees: Kurarav Co., Ltd., Nippon Petrochemicals Co., Ltd.
    Inventors: Toshiyuki Akazawa, Takuji Okaya, Takashi Inoue, Toshitaka Kobayashi