Process for producing aqueous polyurethane coating and coat ther

Details Process for producing aqueous polyurethane coating and coat ther Process for producing aqueous polyurethane coating and coat ther

1996-03-15

1997-09-02

Dudash, Diana

Coating processes

With post-treatment of coating or coating material

Heating or drying

524591, 524840, 524874, 562587, B05D 302

Patent

active

056629664

ABSTRACT:
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.

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Derwent Publications Ltd., London, GB; AN 93-080454; Abstract (no date).

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