Synthesis of polysiloxane having methacryloyloxy group from tributylstannyl ester of silicic acid and silane coupling agent

Polysiloxane derivative (MPS), obtained from the reaction of polymeric trib utylstannyl ester of silicic acid (PTBS) and (3-methacryloyloxypropyl)dimet hylchlorosilane (1a), was shown to be a useful inorganic component for the preparation of organic-inorganic hybrid resin as a nanocomposite. Copolymer ization of MPS containing methacryloyloxypropyl groups with the common mono mer such as styrene, acrylonitrile, or methyl methacrylate proceeded readil y at room temperature under UV irradiation to give the corresponding resins (HR). The resins obtained from MPS and methyl methacrylate showed a good t ransparency and resistance in scratch test, but a poor flexibility. The gel s consisted of analogous structure to HR were obtained from PTBS, 1a, and t he monomer by one-pot procedure, in which substitution and polymerization p roceeded simultaneously.