α,β-Unsaturated schiff-base chain extension reactions for high temperature polymers

Claim 1

A composition of matter consisting essentially of (a) a compound of the formula ##STR45## wherein a is a number from 0.1 to 2, R 1 , R 2 , R 3 and R 4 are independently hydrogen or a monovalent aliphatic, cycloaliphatic or aromatic radical or a combination of such radicals, and R 5 is a divalent organic radical containing from 2 to 30 carbon atoms and selected from the group consisting of aromatic, aliphatic, alkylaromatic and cycloaliphatic radicals combinations of these, and radicals with hetero-atom containing bridging groups where the hetero-atom in the bridge is selected from the group consisting of oxygen, sulfur, nitrogen, phosphorus and silicon, and (b) from about 1 to 10 mole equivalents per mole equivalent of (a) of a bis-dienophile selected from the group consisting of (1) a compound of the formula ##STR46## (2) a polyamide-acid of the formula ##STR47## its corresponding polyimide, (3) a polyamide-amide acid of the formula ##STR48## its corresponding polyamide-imide, and (4) a polyamide-amide acid of the formula ##STR49## and its corresponding polyamide-imide, wherein R 5 and R 7 are the same or different and each is defined as R 5 above, R 6 is a tetravalent aliphatic, cycloaliphatic, aromatic or heterocyclic radical containing at least 2 carbon atoms or a combination of aromatic and aliphatic radicals, m is a number from 1 to 20, and D is a divalent radical containing olefinic unsaturation selected from a group having the formula ##STR50## wherein R 16 is hydrogen, methyl, bromo or chloro; R 17 is hydrogen, bromo or chloro; Y 1 -y 6 inclusive is selected from the group consisting of hydrogen, bromine, chlorine, nitro, phenyl, and alkyl of from 1 to 6 carbon atoms; and X is carbonyl, oxygen, sulfur, chloro or bromo substituted methylene, alkylidene of from 1 to 6 carbon atoms, and benzylidene.