Mitsubishi Chemical Industries Limited

Mitsubishi Chemical Corporation

Ihara Chemical Industry Co., Ltd.

Tatsuhiko Kobayashi

Masaaki Ohtani

Yoshijiro Oyaizu

Kaneyoshi Ashida

Takao Harada

Makoto Ichii

A process for producing an aqueous polyurethane coating is provided. A polyisocyanate, a polyol and a dimethylol alkane acid of the following formula, ##STR1## where R is an alkyl group of 2 to 10 carbon atoms, are simultaneously reacted in the presence of an organic solvent having a boiling point of 50.degree. to 120.degree. C. to thereby prepare an urethane polymer solution. The organic solvent is removed from the urethane polymer solution after the polymer has been dissolved or dispersed in water. The coating is of a substantially solvent-free form without reliance on any solvent having a high boiling point which results in impaired coating environment and reduced coat quality. The coat therefrom is widely useful for construction materials, automotive parts, electrical parts and textile products in particular and also is highly effective for preventing volatile of organic compound from becoming emitted in the atmosphere.

Process for producing aqueous polyurethane coating and coat therefrom

A polyurethane elastomer and a metal are strongly adhered by using (1) a composition containing a polyepoxy compound and a polyamine compound and (2) a composition containing an isocyanate compound having a concentration of isocyanate group of 15-50% by weight. An adhered composite article thus obtained has excellent water resistance and heat resistance.

Process for adhering polyurethane elastomer to metal

A cryogenic heat insulating structure comprises: a wall coated with a plurality of superposed rigid foam layers each of the layers having a skin and each layer containing fibers oriented parallel to the wall.

Cryogenic insulating structure

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Yokohama, Japan

Tatsuhiko Kobayashi