Integral skin polyurethane foam

Details Integral skin polyurethane foam Integral skin polyurethane foam

1990-09-20

1992-07-21

Welsh, Maurice J.

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

Synthetic resins

Cellular products or processes of preparing a cellular...

264 51, C08G 1814

Patent

active

051323290

ABSTRACT:
A process for preparing a flexible, low density, integral skin polyurethane foam wherein water is used as the sole blowing and density controlling agent. The process entails reacting an isocyanate component with a compound containing isocyanate reactive groups and further containing ether linkages, a polyurethane promoting catalyst, an alcohol, a surfactant, a chain extender and optional additives. The reaction is carried out at molded densities of from 15 pcf to 30 pcf in molds preheated to about 90.degree. F. to about 130.degree. F.

REFERENCES:
patent: 4605681 (1986-08-01), Grey et al.
patent: 4780482 (1988-10-01), Kruger

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