"The process of claim 1, wherein the hindered aryl amine activator has the formula: wherein each of R1 and R2 is H, alkyl or substituted alkyl, at least one of R1 and R2 being other than H, and each R3 is independently H, alkyl or substituted alkyl, or two adjacent R3 moieties are taken together to form a fused aromatic or aliphatic ring. 3." . . . . .