Patent ID: 8569538

Claim:
A method for producing a siloxanyl monomer composition, the composition comprising monomers having the structures: wherein R 1 represents a C 1 -C 20 substituent having at least one unsaturated bond, wherein R 3 represents a C 1 -C 7 divalent substituent, wherein A represents a siloxanyl group, and wherein X represents a hydrogen; the method comprising the step of reacting unsaturated compounds having the structures: wherein R 1 represents a C 1 -C 20 substituent having at least one unsaturated bond, wherein R 2 represents a C 1 -C 7 substituent having at least one unsaturated bond, and wherein X represents a hydrogen; with a siloxanyl compound having a structure A-H, wherein A represents a siloxanyl group, in the presence of a metal catalyst, thereby producing a reaction mixture containing a siloxanyl monomer; wherein the molar ratio of the unsaturated compound to the siloxanyl compound is from about 1.2:1 to about 10:1 during the reacting step.