Process for preparing rigid polyurethane foams

Details Process for preparing rigid polyurethane foams Process for preparing rigid polyurethane foams

1986-06-30

1987-11-03

Welsh, Maurice J.

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

Synthetic resins

Cellular products or processes of preparing a cellular...

528 73, C08G 1814

Patent

active

047044110

ABSTRACT:
This invention is directed to a process by preparing a rigid polyurethane foam which comprise reacting a polyisocyanate with a polyol in the presence of a blowing agent, a polymerization catalyst and a surfactant. The polyol has the formula ##STR1##

REFERENCES:
patent: 3221016 (1965-11-01), Currier et al.
patent: 3251787 (1966-05-01), Bedoit
patent: 3251788 (1966-05-01), Currier et al.

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