Carbodiimide-isocyanurate foams modified with ethoxylated polyols
AssigneeBASF Wyandotte Corporation
InventorsMoses Cenker, Peter Tai-Yuen Kan
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Abstract
Rigid cellular foams are prepared by catalytically condensing an organic polyisocyanate in the presence of (a) a carbodiimide-promoting catalyst, (b) a trimerization catalyst, (c) a urethane catalyst, and (d) from 10 parts to 40 parts per 100 parts of polyisocyanate of a polyol mixture comprising (1) from 5 parts to 30 parts of a polyoxyethylated polyhydric alcohol and (2) from 5 parts to 25 parts of a polyoxyethylated phosphate polyol.
Claims10
A cellular foam characterized by carbodiimide, isocyanurate and urethane linkages prepared by catalytically condensing an organic polyisocyanate in the presence of (a) a carbodiimide-promoting catalyst;
- (b) a trimerization catalyst;
- (c) a urethane catalyst, and (d) from 10 parts to 40 parts by weight per 100 parts by weight of polyisocyanate of a polyol mixture comprising (1) from 5 parts to 30 parts of a polyoxyethylated polyhydric alcohol and (2) from 5 parts to 25 parts of an ethoxylated acid of phosphorus, said acid having a P.sub.2 O.sub.5 equivalency of from about 72% to about 95% by weight.
Dependencies are inferred from the claim text.