Synthetic polymers by polyisocyanate polyaddition process

Details Synthetic polymers by polyisocyanate polyaddition process Synthetic polymers by polyisocyanate polyaddition process

1980-09-22

1982-05-04

Welsh, Maurice J.

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

Synthetic resins

Cellular products or processes of preparing a cellular...

528 68, C08G 1832

Patent

active

043283225

ABSTRACT:
Synthetic polymers and a process for their preparation by a polyisocyanate polyaddition reaction are described. Synthetic polymers are provided by the reaction of a polyisocyanate with substantially an equivalent amount of an oligomeric para-, meta- or di-meta-aminobenzoic acid ester or amide having the formula ##STR1## wherein n is an integer of from 2 to 4; each x is one or two; each benzoyl nucleus is para-, meta- or di-meta- amino-substituted; each Z is ##STR2## and G is an n-valent radical which may be obtained by the removal of hydroxyl or amino groups from an n-valent oligomeric polyol or polyamine having a molecular weight of from about 400 to about 6,000. Useful synthetic polymeric products can be simply and effectively provided by reaction of the polyisocyanate and the oligomeric aminobenzoic acid ester or amide reactants without the requirement of additional curative or chain-extending agents.

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