Process for producing polyurethane foam

Details Process for producing polyurethane foam Process for producing polyurethane foam

1988-12-22

1990-05-08

Welsh, Maurice J.

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521118, 521129, 521167, 521174, 521176, C08G 1818, C08G 1865

Patent

active

049239040

ABSTRACT:
A process for producing a polyurethane foam from a foam raw material containing polyols, organic isocyanates, catalysts and blowing agents, which comprises using as the polyols a high-molecular weight polyol having a hydroxyl number lower than 100 and a low-molecular weight polyol having a hydroxyl number higher than 200 which are mixed at a ratio of 4:6 to 6:4 (by weight), and also using as the catalysts a tertiary amine alone. Polyurethane forms having good buckling performance can be obtained by the process and they are expected to be useful as a packaging material, shock-absorbing material, heat-insulating material, and so on.

REFERENCES:
patent: 4475847 (1984-10-01), Cornely et al.
patent: 4792576 (1988-12-01), Nodelman

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