Method for producing non-yellowing polyurethane urea foam

Details Method for producing non-yellowing polyurethane urea foam Method for producing non-yellowing polyurethane urea foam

C - Chemistry, Metallurgy

08

G

C08G 18/10 (2006.01) C08G 18/18 (2006.01) C08G 18/22 (2006.01) C08G 18/42 (2006.01) C08G 18/48 (2006.01) C08G 18/73 (2006.01) C08G 18/75 (2006.01)

Patent

CA 2049833

Abstract of the Disclosure A method for producing a non-yellowing poly- urethane urea foam, which comprises reacting an iso- cyanate-terminated prepolymer obtained by the addition reaction of a polyol having a number average molecular weight of 100 to 5,000 and containing on the average 2 to 3 functional groups with an aliphatic polyisocyanate in an amount of 1.4 to 2.6 times the hydroxyl equivalent, with water in an amount of 0.4 to 5 times the isocyanate equivalent in the presence of, per 100 parts by weight of the prepolymer, 0.1 to 5 parts by weight of a carboxylic acid metal salt or 0.1 to 10 parts by weight of an amine- type catalyst.

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