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

1991-08-26

1992-09-15

Foelak, Morton

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521129, 521159, C08J 900

Patent

active

051478978

ABSTRACT:
A method for producing a non-yellowing polyurethane urea foam, which comprises reacting an isocyanate-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.

REFERENCES:
patent: 3897581 (1975-07-01), Nakatsuka et al.
patent: 3919173 (1975-11-01), Coyner et al.
patent: 4189542 (1980-02-01), Kleimann et al.
patent: 4689353 (1987-08-01), Harris

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