| 摘要 |
PURPOSE:A resin composition excellent in moldability, abrasion resistance and its retention and useful for molding a recording/reproduction medium, containing a resin derived from a composition formed by polymerizing a monomer in the presence of an organopolysiloxane. CONSTITUTION:A resin composition comprising a resin (e.g., PVC) and 0.8-3wt%, based on the resin, organopolysiloxane (e.g., dimethylpolysiloxane), wherein at least part of said resin and at least 0.4wt%, based on the resin, said organopolysiloxane is derived from a composition obtained by polymerizing the corresponding monomers in the organopolysiloxane. A contact-type recording/reproduction medium prepared from this composition has good initial reproduction properties and a remarkable good abrasion resistance when brought into frictional contact with objects and besides it can exhibit excellent reproduction performances for a long time because these excellent performances scarcely deteriorate even after a long-term use.
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