Preparation of thermally stable rigid polyurethane foam

Details Preparation of thermally stable rigid polyurethane foam Preparation of thermally stable rigid polyurethane foam

1980-06-02

1981-06-16

Welsh, Maurice J.

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521112, 521167, 521175, C08G 1814

Patent

active

042738822

ABSTRACT:
A process for the preparation of rigid polyurethane foams which are relatively stable at elevated temperatures involves reacting a polyether polyol reactant with an organic polyisocyanate reactant in the presence of a foaming agent comprising water. The polyol reactant is a select combination of three polyols and is effective in improving the thermal stability of the resulting foam without appreciably affecting its other physical properties.

REFERENCES:
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patent: 3332934 (1967-07-01), Booth et al.
patent: 3442888 (1969-05-01), Degginger et al.
patent: 3509077 (1970-04-01), Shultz
patent: 3799896 (1974-03-01), Moss
patent: 3903346 (1975-09-01), DeLeon et al.
patent: 3940517 (1976-02-01), DeLeon
patent: 4028158 (1977-06-01), Hipchen et al.

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