Method for producing a low-density flexible polyurethane foam

Details Method for producing a low-density flexible polyurethane foam Method for producing a low-density flexible polyurethane foam

1990-10-18

1992-07-14

Kight, III, John

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Cellular products or processes of preparing a cellular...

521167, 521172, 521174, C08G 1806

Patent

active

051303469

ABSTRACT:
A method producing a low-density flexible polyurethane foam comprising stirring a starting mixture containing a polyhydroxy compound, a polyisocyanate, a foaming agent and a catalyst to thereby foam the mixture, in which a foaming agent selected from the group consisting of water, formic acid and its salts is used in an amount of at least 10% by weight as water equivalent per 100 parts by weight of the polyhydroxy compound, and the mixture is stirred at 15.degree. C. or below by previously adjusting the temperature of the mixture to 15.degree. C. or below and under a highly catalytic activity.

REFERENCES:
patent: 4226947 (1980-10-01), Yukuta et al.
patent: 4490490 (1984-12-01), Patton, Jr. et al.
patent: 4512831 (1985-04-01), Tillotson
patent: 4845133 (1989-07-01), Priester, Jr. et al.
patent: 4950694 (1990-08-01), Hager
patent: 5011908 (1991-04-01), Hager

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