Patents by Inventor Tamio Ishiai

Tamio Ishiai 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).

  • Abrasive material having a polycarbodiimide and polyurethane resin binder
    Patent number: 4221572
    Abstract: An abrasive material which comprises abrasive grains and a polycarbodiimide and polyurethane resin as the binder for the abrasive grains and a method of preparation thereof are disclosed. The polycarbodiimide and polyurethane resin is prepared by reacting a polyisocyanate and a polyol in the presence of a catalyst. The resin has a specified amount of carbodiimide bonding and urethane bonding.
    Type: Grant
    Filed: March 2, 1978
    Date of Patent: September 9, 1980
    Assignee: Kao Soap Company
    Inventors: Yasuhiro Torimae, Tamio Ishiai
  • Process for producing artificial leather
    Patent number: 4102719
    Abstract: A process for producing an artificial leather having excellent touch, appearance and full-hand similar to that of natural leather and having further excellent softness and surface strength, which comprises coating a composition comprising an urethane prepolymer, a combination of catalysts and a foam stabilizer and including a plurality of extremely fine cells (foams) of an inert gas, onto a release paper or a layer of a surface treating agent coated on a release paper in a specified thickness; subjecting the resultant to a steam treatment under a specified atmosphere; laminating a base sheet onto the coating layer under pressure; subjecting the laminated product to a heat treatment at a specified temperature, and then peeling off the release paper, and optionally further treating the product with a surface treating agent.
    Type: Grant
    Filed: July 15, 1976
    Date of Patent: July 25, 1978
    Assignees: Dynic Corporation, Kao Soap Co., Ltd.
    Inventors: Sadao Fujii, Hidehiko Maki, Toru Orisaka, Shoji Matsuda, Koichi Nishida, Tamio Ishiai, Tasaku Nishii, Yuichi Ueda
  • Process for production of artificial leathers having air permeability
    Patent number: 3959049
    Abstract: A process for the production of artificial leathers having excellent air permeability and resembling a natural leather is provided, which comprises incorporating a catalyst, a foam stabilizer and, optionally, a pigment and other additive into an isocyanate-terminated polyurethane prepolymer formed by compounding a polyester diol derived from an aliphatic dicarboxylic acid with an organic polyisocyanate so that the [NCO]/[OH] ratio is within a range of from 2.0 to 4.0, to thereby form a substantially solvent-free paint having a viscosity adjusted to 70 to 1000 poises, coating the paint on a release paper in an amount of 50 to 400 g/m.sup.2, applying the release paper to a substrate, allowing foaming and polymerization reactions to proceed in an atmosphere of a dry-bulb temperature of 40.degree. to 95.degree.C.
    Type: Grant
    Filed: June 26, 1974
    Date of Patent: May 25, 1976
    Assignee: Nippon Cloth Industry Co., Ltd.
    Inventors: Yoshinobu Tanaka, Hidehiko Maki, Tamio Ishiai, Tasaku Nishii, Singi Oota