Patent ID: 7294742

Claim:
A controlled radical polymerization initiator system comprising: a) an initiator of the formula: wherein X is Cl, Br, or a pseudohalogen group; R 1 and R 2 are each independently selected from X, H, an alkyl group, a cycloalkyl group, a heterocyclic group, an arenyl group and an aryl group, or R 1 and R 2 taken together with the carbon to which they are attached form a carbocyclic ring; R 3 and R 4 are each independently selected from an alkyl group, a cycloalkyl group, an aryl group, an arenyl group, or R 3 and R 4 taken together with the carbon to which they are attached form a carbocyclic ring; Q is a linking group selected from a covalent bond, (—CH 2 —) o , —CO—O—(CH 2 ) o —, —CO—O— R 5 is an organic moiety and has a valency of m, or an organic or inorganic solid support; (CH 2 CH 2 O) o —, —CO—NR 6 —(CH 2 ) o —, —CO—S—(CH 2 ) o —, where o is 1 to 12, and R 6 is H, an alkly group, a cycloalkyl group, an arenyl group, a heterocyclic group or an aryl group; Z is O, NH, S or NR 6 , wherein R 6 is a C 1 to C 6 alkyl group; and m is an integer of 1 to 8, and b) a transition metal compound that participates in a reversible redox cycle.