| 摘要 |
PURPOSE:To obtain the medical implement which can prevent the migration of a plasticizer and has good water resistance by forming the implement of a molding made of a resin compsn. which is prepd. by compounding specific tetraesther of pyromellitic acid and stabilizer at specific rations with a specific ratio of a vinyl chloride resin. CONSTITUTION:The tetraester of pyromellitic acid used as the plasticizer is expressed by formula (I) and is used at 10-200 pts.wt. per 100 pts.wt. vinyl chloride resin. An epoxy compd., for example, metal soaps composed of epoxylated vegetable oil such as epoxylated soybean oil and calcium, etc., and a mixture composed of, for example, calcium stearate, etc., or epoxy resin and metal soaps are compounded as the stabilizer. The ratio thereof is usually 0.5-20 pts.wt. per 100 pts.wt. vinyl chloride resin. In formula, R is an aliphat. hydrocarbon of 4-18C. |
