Patents by Inventor Junkoh Hyoda

Junkoh Hyoda 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).

  • Process of preparing copolymer latex and use thereof
    Patent number: 5703157
    Abstract: A process for preparing a copolymer latex comprising emulsion polymerizing an aliphatic conjugated diene monomer and other monomer copolymerizable therewith in the presence of a cyclic unsaturated hydrocarbon having one unsaturated bond in a ring, in which, preferably a monomer mixture which does not contain the aliphatic conjugated diene monomer is added after the addition of a monomer mixture containing the aliphatic conjugated diene monomer, or a part of a chain transfer agent is added after the addition of the monomers. This copolymer latex is useful as an adhesive composition, a paper coating composition, an adhesive composition for back-sizing carpets, an adhesive composition for rock fiber materials, a paper coating composition for gravure printing, and a color developing composition for a pressure sensitive copying paper.
    Type: Grant
    Filed: December 3, 1996
    Date of Patent: December 30, 1997
    Assignee: Sumitomo Dow Limited
    Inventors: Wataru Fujiwara, Junkoh Hyoda, Kenichi Yamazaki, Noriko Kitamura
  • Process for preparing copolymer latex and use thereof
    Patent number: 5656689
    Abstract: A process for preparing a copolymer latex comprising emulsion polymerizing an aliphatic conjugated diene monomer and other monomer copolymerizable therewith in the presence of a cyclic unsaturated hydrocarbon having one unsaturated bond in a ring, in which, preferably a monomer mixture which does not contain the aliphatic conjugated diene monomer is added after the addition of a monomer mixture containing the aliphatic conjugated diene monomer, or a part of a chain transfer agent is added after the addition of the monomers. This copolymer latex is useful as an adhesive composition, a paper coating composition, an adhesive composition for back-sizing carpets, an adhesive composition for rock fiber materials, a paper coating composition for gravure printing, and a color developing composition for a pressure sensitive copying paper.
    Type: Grant
    Filed: September 22, 1995
    Date of Patent: August 12, 1997
    Assignee: Sumitomo Dow Limited
    Inventors: Wataru Fujiwara, Junkoh Hyoda, Kenichi Yamazaki, Noriko Kitamura
  • Process of preparing copolymer latex and use thereof
    Patent number: 5648420
    Abstract: A process for preparing a copolymer latex comprising emulsion polymerizing an aliphatic conjugated diene monomer and other monomer copolymerizable therewith in the presence of a cyclic unsaturated hydrocarbon having one unsaturated bond in a ring, in which, preferably a monomer mixture which does not contain the aliphatic conjugated diene monomer is added after the addition of a monomer mixture containing the aliphatic conjugated diene monomer, or a part of a chain transfer agent is added after the addition of the monomers. This copolymer latex is useful as an adhesive composition, a paper coating composition, an adhesive composition for back-sizing carpets, an adhesive composition for rock fiber materials, a paper coating composition for gravure printing, and a color developing composition for a pressure sensitive copying paper.
    Type: Grant
    Filed: September 26, 1995
    Date of Patent: July 15, 1997
    Assignee: Sumitomo Dow Limited
    Inventors: Wataru Fujiwara, Junkoh Hyoda, Kenichi Yamazaki, Noriko Kitamura
  • Copolymer latex and its production
    Patent number: 4381365
    Abstract: A process for preparing a copolymer latex by polymerization of at least one aliphatic conjugated diene monomer, at least one ethylenically unsaturated carboxylic acid monomer and at least one monoolefinic monomer copolymerizable with them in a weight proportion of 19.5-80:0.5-10:10-80, characterized in that (a) a mixture of the whole amount of the aliphatic conjugated diene monomer, the whole amount of the ethylenically unsaturated carboxylic acid monomer and a portion of the monoolefinic monomer, the combined amount of them being from 45 to 99% by weight on the basis of the total amount of the starting monomers, is subjected to emulsion polymerization, and (b) after or while the remainder of the monoolefinic monomer in an amount of from 1 to 55% by weight on the basis of the total amount of the starting monomers is added to the reaction mixture, the further emulsion polymerization is carried out.
    Type: Grant
    Filed: October 29, 1981
    Date of Patent: April 26, 1983
    Assignee: Sumitomo Naugatuck Co., Ltd.
    Inventors: Saburo Mishiba, Junkoh Hyoda, Akira Uchida, Hisao Usami, Akira Watanabe