Kao Soap Company, Ltd.

Dynic Corporation

Tamio Ishiai

Yasuhiro Torimae

Hidehiko Maki

Toru Orisaka

Shoji Matsuda

Yuichi Ueda

Koichi Nishida

Sadao Fujii

Tasaku Nishii

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.

Abrasive material having a polycarbodiimide and polyurethane resin binder

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.

Process for producing artificial leather

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Wakayama, Japan

Tamio Ishiai