| 摘要 |
PURPOSE:To provide a resin compsn. contg. no platicizer, having excellent thermal stability, transparency and moldability and suitable for use in the produc tion of medical equipment such as blood container, containing an unplasticized non-rigid vinyl chloride resin, an epoxidized stabilizer and a methacrylate copoly mer. CONSTITUTION:20-69% (by weight, the same applies hereinbelow) vinyl chloride and 1-25% copolymerizable monomer such as C1-C30 alkyl (meth)acrylate are grafted onto 30-70% ethylene/vinyl acetate copolymer having a vinyl ace tate content of 20-70% to obtain an unplasticized vinyl chloride resin composed of a graft copolymer. 1-10pts.wt. epoxidized stabilizer (e.g. epoxidized oil having an oxirane content of 5-10% and an iodine value of 10 or below) obtd. by epoxidizing obtd. by epoxidizing a natural or synthetic oil, and 0.3-5pts.wt. methacrylate copolymer having an MW of 30,000-2,000,000, composed of a major portion of methyl methacrylate, a minor portion of a C1-C8 alkyl acrylate and optionally styrene, are blended with 100pts.wt. said resin.
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