Patents by Inventor Hiraki Tadayoshi

Hiraki Tadayoshi 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).

  • Finely divided gelled polymer and process for producing the same
    Patent number: 5021530
    Abstract: A finely divided gelled polymer obtained by emulsion polymerizing(a) a polymerizable monomer containing at least two radially polymerizable unsaturated groups in the molecule, and(b) a radically polymerizable unsaturated monomer other than the one mentioned in (a), abovein the presence of a reactive emulsifier containing an allyl group in the molecule.A process for producing a finely divided gelled polymer which comprises emulsion polymerizing(a) a polymerizable monomer containing at least two radically polymerizable unsaturated groups in the molecule, and(b) a radically polymerizable unsaturated monomer other than the one mentioned in (a), above in the presence of a reactive emulsifier containing an allyl group in the molecule, characterized by using a water-soluble azoamide compound as a polymerization initiator.
    Type: Grant
    Filed: August 8, 1989
    Date of Patent: June 4, 1991
    Assignee: Kansai Paint Co., Ltd.
    Inventors: Kenji Yamamoto, Hiraki Tadayoshi