| 摘要 |
PURPOSE:To obtain the subject resin having excellent sliding property, abrasion resistance, weather resistance, freeze resistance, impact resistance, etc., and suitable as a part to be used in cold district, etc., by condensing an organosiloxane with a specific graft-crosslinking agent and graft-polymerizing a vinyl monomer. CONSTITUTION:A modified polyorganosiloxane is produced by condensing (A) 90-99.8wt.% of an organosiloxane having the structural unit of formula I (R<1> is substituted or unsubstituted hydrocarbon group; n is 0-3) (e.g., hexamethylcyclotrisiloxane) and (B) 10-0.2wt.% of a graft-crosslinking agent containing an unsaturated group of formula II (R<2> is H or 1-6C alkyl) and an alkoxysilyl group (e.g., p-vinylphenylmethyldimethoxysilane). The obtained polyorganosiloxane is graft-polymerized with (C) a vinyl monomer (e.g., styrene) to obtain the objective resin containing the component C accounting for preferably 95-20wt.% of the whole polymer composition. |
