Azo monomer useful in polymerization systems

Claim 1

A compound of the formula ##STR17## wherein: (a) R"s are independently selected from alkyl of 1 to 8 carbons, aralkyl of 7 to 12 carbons, or aryl of 6 to 14 carbons, with the proviso that only one R" may be aryl, the R"s can also be joined to form a cyclo, bicyclo or tricyclo of 3 to 12 carbons; (b) R 1 and R 2 are independently selected from alkyl of 1 to 8 carbons, cycloalkyl of 3 to 12 carbons, aralkyl of 7 to 12 carbons, or a ring substituted cycloalkyl of 5 to 6 carbons wherein the ring substituent is one or more of oxygen, nitrogen or sulfur, R 1 and R 2 can be joined to form an alkylene diradical of 3 to 11 carbons, R 1 can also be an aryl of 6 to 14 carbons; (c) X is selected from ##STR18## p1 (d) Y is selected from oxygen or sulfur; (e) R 3 is selected from alkyl of 1 to 8 carbons, cycloalkyl of 3 to 12 carbons or aryl of 6 to 14 carbons; (f) R 4 is selected from alkyl of 1 to 6 carbons; (g) R 5 and R' 5 are independently selected from alkyl of 1 to 8 carbons or aryl of 6 to 14 carbons, R 5 and R' 5 can be joined to form an alkylene diradical of 1 to 8 carbons or an arylene diradical of 6 to 14 carbons; (h) R 6 is selected from hydrogen, alkyl of 1 to 8 carbons, cycloalkyl of 3 to 12 carbons or aryl of 6 to 14 carbons; (i) one of R 1 , R 2 , R 3 , R 4 , R 5 , R 6 or R" must be substituted with ##STR19## (j) R 7 is selected from hydrogen, alkyl of 1 to 6 carbons or C1--; (k) R 8 is selected from hydrogen or ##STR20## (l) R 9 is selected from H or alkyl of 1 to 6 carbons; (m) when R 8 is hydrogen, A is selected from ##STR21## (n) when R 7 and R 8 are both hydrogen, A is selected from ##STR22## (o) when R 8 is ##STR23## R 7 is hydrogen and A is ##STR24## (p) Z is selected from ##STR25## (q) R' 10 is selected from a covalent or --R 10 D--; (r) R 10 is selected from alkylene of 1 to 8 carbons; (s) D is selected from ##STR26## or covalent bond; and (t) R 11 is selected from aryl of 6 to 14 carbons, pyridine, carbazole, pyrrolidone, piperidone or caprolactam.