Patents by Inventor Junnosuke Yamauchi

Junnosuke Yamauchi 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).

  • Pressure sensitive adhesive compositions
    Patent number: 4181635
    Abstract: A pressure-sensitive adhesive composition having excellent tackiness and improved thermal resistance comprises (A) a low molecular weight polyisoprene, which may be obtained by polymerizing isoprene monomer with the aid of a lithium-type catalyst, said polyisoprene having a cis-1,4 content of not less than 75%, a viscosity average molecular weight of 8,000 to 77,000 and an Mw/Mn value (Mw: weight average molecular weight; Mn: number average molecular weight) of 1.0 to 2.7 and (B) an elastomer.
    Type: Grant
    Filed: February 17, 1978
    Date of Patent: January 1, 1980
    Assignee: Kuraray Co., Ltd.
    Inventors: Hideo Takamatsu, Shobu Minatono, Katsuyoshi Terao, Junnosuke Yamauchi
  • Process for the production of modified cis-14,-polyisoprene
    Patent number: 3965076
    Abstract: A modified cis-1,4-polyisoprene rubber having enhanced green strength is produced by reacting said rubber with maleic anhydride in a solvent including an aliphatic hydrocarbon or an alicyclic hydrocarbon or an alicyclic hydrocarbon; the efficiency of the reaction of the maleic anhydride is markedly increased by employing a relatively minor amount of an aromatic hydrocarbon in combination with the aliphatic or alicyclic hydrocarbon reaction solvent.
    Type: Grant
    Filed: July 12, 1974
    Date of Patent: June 22, 1976
    Assignee: Kuraray Co., Ltd.
    Inventors: Junnosuke Yamauchi, Takayuki Okamura, Shobu Minatono