RESIN COMPOSITION FOR MEDICAL INSTRUMENT CONSTRUCTION

摘要

PURPOSE:To provide a resin compsn. with reduced hemolytic effect and cytotoxicity, by a method wherein finely divided magnesium oxide or calcium oxide powder is blended with a mixt. of a vinyl chloride resin and an ethylene-carbon monoxide- vinyl acetate copolymer. CONSTITUTION:5-200pts.wt. of an ethylene-carbon monoxide-vinyl acetate copolymer and 0.01-10pts.wt. of finely divided magnesium oxide or calcium oxide powder are blended with 100pts.wt. of a vinyl chloride resin. The ethylene-carbon monoxide-vinly acetate copolymer used is one resulting from the copolymerization of 0.03-5pts.wt. of carbon monoxide and 0.1-0.9pts.wt. of vinyl acetate with 1pt.wt. of ethylene. When the amount of said copolymer is less than 5pts.wt., flexibility can not be obtd. When the amount of said copolymer is more than 200pts.wt., the compsn. is too flexible and is difficult to retain its shape. When the amount of magnesium oxide or calcium oxide is more than 10pts.wt., transparency and flexibility are deteriorated.