Patents Assigned to Yasuhara Chemical Co., Ltd.
  • ?-pinene polymer and process for producing the same
    Patent number: 8093344
    Abstract: To provide a ?-pinene polymer excellent in heat resistance while having thermoplasticity, and further also having excellent strength, without impairing the inherent characteristics of small specific gravity and excellent transparency. A desired ?-pinene polymer having a weight average molecular weight of 90,000 to 1,000,000 and a glass transition temperature of 80° C. or more was obtained by polymerizing ?-pinene in the presence of a bifunctional vinyl compound.
    Type: Grant
    Filed: April 1, 2009
    Date of Patent: January 10, 2012
    Assignees: Yasuhara Chemical Co., Ltd., Kuraray Co., Ltd., National University Corporation Nagoya University
    Inventors: Masami Kamigaito, Kotaro Satoh, Hiroko Sugiyama
  • Beta-PINENE POLYMER AND PROCESS FOR PRODUCING THE SAME
    Publication number: 20090209720
    Abstract: To provide a ?-pinene polymer excellent in heat resistance while having thermoplasticity, and further also having excellent strength, without impairing the inherent characteristics of small specific gravity and excellent transparency. A desired ?-pinene polymer having a weight average molecular weight of 90,000 to 1,000,000 and a glass transition temperature of 80° C. or more was obtained by polymerizing ?-pinene in the presence of a bifunctional vinyl compound.
    Type: Application
    Filed: April 1, 2009
    Publication date: August 20, 2009
    Applicants: Yasuhara Chemical Co., Ltd., Kuraray Co., Ltd., National University Corporation Nagoya University
    Inventors: Masami Kamigaito, Kotaro Satoh, Hiroko Sugiyama
  • Moistureproof hot melt composition and moistureproof paper
    Patent number: 6455168
    Abstract: A moistureproof hot melt composition comprising polyethylene and/or polypropylene (A) and a tackifier resin (B), component (A), component (B) and wax (C), an ethylene-vinyl acetate copolymer (D) and component (B), or component (D), component (B) and component (C); and moistureproof paper excellent in moistureproof properties and recyclability, low in cost and excellent in productivity, which paper is coated with the above composition.
    Type: Grant
    Filed: May 24, 2001
    Date of Patent: September 24, 2002
    Assignee: Yasuhara Chemical Co., Ltd.
    Inventors: Tatsuhiro Kuno, Takaichiro Shimokado, Yoshitada Nishikiori
  • Moistureproof hot melt composition and moistureproof paper
    Publication number: 20020016402
    Abstract: A moistureproof hot melt composition comprising polyethylene and/or polypropylene (A) and a tackifier resin (B), component (A), component (B) and wax (C), an ethylene-vinyl acetate copolymer (D) and component (B), or component (D), component (B) and component (C); and moistureproof paper excellent in moistureproof properties and recyclability, low in cost and excellent in productivity, which paper is coated with the above composition.
    Type: Application
    Filed: May 24, 2001
    Publication date: February 7, 2002
    Applicant: YASUHARA CHEMICAL CO. LTD
    Inventors: Tatsuhiro Kuno, Takaichiro Shimokado, Yoshitada Nishikiori