Methacryl function dimethylpolysiloxanes and graft copolymers thereof

A method for producing a methacryl functional dimethylpolysiloxane having the general formula (1):

• ##STR25## wherein letters n and m are independently an integer of from 2 to 50 comprising:
• subjecting hexamethylcyclotrisiloxane having formula (2):
• ##STR26## to ring opening polymerization in the presence of trimethylsilanol (CH.sub.3).sub.3 SiOH and a pentavalent silicon complex catalyst to synthesize two single silanol-terminated compounds having formulae (3) and (4):
• ##STR27## wherein letters n and m are as defined above, mixing the single silanol-terminated compounds of formulae (3) and (4) with .gamma.-methacryloxypropylmethyldichlorosilane in equimolar amounts, and dehydrochlorinating the mixture in the presence of a hydrogen chloride scavenger.