Patents by Inventor Takuya Otsubo

Takuya Otsubo 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).

  • Patent number: 11186722
    Abstract: A resin coated inorganic or metallic pigment includes inorganic or metallic particles (A) and an acrylic copolymer (B) formed on the inorganic or metallic particles (A) by subjecting a radically polymerizable unsaturated carboxylic acid or radically polymerizable phosphate monomer (B1) and a monomer (B2) containing 3 to 6 (meth)acryloyloxy groups per molecule to radical polymerization reaction using a polymerization initiator (C) containing a nitrile group, wherein the inorganic or metallic particles (A) are coated with a coating resin including the acrylic copolymer (B), and the acrylic copolymer (B) has at a tail thereof a structure which is derived from the polymerization initiator (C) and which is represented by the following general formula (1): wherein R1 represents a methyl group, and R2 represents an alkyl group having 2 to 5 carbon atoms, or the like.
    Type: Grant
    Filed: October 31, 2016
    Date of Patent: November 30, 2021
    Assignee: DIC Corporation
    Inventors: Daisuke Nakazawa, Norio Kosaka, Kazuhiro Sugiyama, Takuya Otsubo
  • Publication number: 20190185676
    Abstract: A resin coated inorganic or metallic pigment includes inorganic or metallic particles (A) and an acrylic copolymer (B) formed on the inorganic or metallic particles (A) by subjecting a radically polymerizable unsaturated carboxylic acid or radically polymerizable phosphate monomer (B1) and a monomer (B2) containing 3 to 6 (meth)acryloyloxy groups per molecule to radical polymerization reaction using a polymerization initiator (C) containing a nitrile group, wherein the inorganic or metallic particles (A) are coated with a coating resin including the acrylic copolymer (B), and the acrylic copolymer (B) has at a tail thereof a structure which is derived from the polymerization initiator (C) and which is represented by the following general formula (1): wherein R1 represents a methyl group, and R2 represents an alkyl group having 2 to 5 carbon atoms, or the like.
    Type: Application
    Filed: October 31, 2016
    Publication date: June 20, 2019
    Inventors: Daisuke Nakazawa, Norio Kosaka, Kazuhiro Sugiyama, Takuya Otsubo