Polyether polyol formulations for hard CFC replacement by water

Details Polyether polyol formulations for hard CFC replacement by water Polyether polyol formulations for hard CFC replacement by water

1988-12-07

1990-07-24

Welsh, Maurice J.

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521174, 521175, 521177, C08G 1814, C08G 1848

Patent

active

049435973

ABSTRACT:
Rigid closed-cell polyisocyanate-based foams are prepared by the reaction of polyisocyanate with a polyol composition having an average hydroxyl number of about 100 to about 500 and comprising at least one polyether polyol containing four or more active hydrogens and having a hydroxyl number of from about 50 to about 500. The blowing of the foam is essentially with carbon dioxide generated from the reaction of water with polyisocyanate so as to provide foams of the desired density containing at least 40 mole percent carbon dioxide in their cells.

REFERENCES:
patent: 3865806 (1975-02-01), Knodel
patent: 3965052 (1976-06-01), Iwasaki
patent: 4273882 (1981-06-01), Raynor

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