The composition according to claim 20, wherein the activator comprises ##STR18## wherein R1 is a o-, m-, or p-phenolic group;R2 is a branched or unbranched alkyl group or an aryl group; R3 is H, a branched or unbranched alkyl group or an aryl group; and R4 is H, a branched or unbranched alkyl group or an aryl group. 28.