Patents by Inventor Toyoji Hatta

Toyoji Hatta 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).

  • Coating compositions
    Patent number: 4841008
    Abstract: A chipping resistant polyurethane coating composition which comprises:(a) a polyisocyanate blocked with an oxime or a lactam or a polyurethane prepolymer having terminal isocyanate groups blocked with an oxime or a lactam;(b) a polyaminepolyetherpolyester which is a condensate of a polyaminepolyether and an organic carboxylic acid, the polyaminepolyether being an adduct of an oxirane compound to a polyamine compound, a polyamidepolyamineopolyether which is an adduct of an oxirane compound to a polyamidepolyamine, the polyamidepolyamine being a condensate of a polyamine and an organic carboxylic acid; or a mixture of the polyaminepoly-etherpolyester and the polyamidepolyaminepolyether.The composition in which an aromatic polyisocyanate or its prepolymer blocked with an oxime is curable at temperatures of about 90.degree.-100.degree. C.
    Type: Grant
    Filed: August 4, 1988
    Date of Patent: June 20, 1989
    Assignee: Takeda Chemical Industries, Ltd.
    Inventors: Takashi Tsukamoto, Toyoji Hatta, Ichiro Minato