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    • 4. 发明授权
    • Polypropylene resin compositions
    • 聚丙烯树脂组合物
    • US5328950A
    • 1994-07-12
    • US24858
    • 1993-02-26
    • Sachio YokoteYoichi KawaiMasaki Misumi
    • Sachio YokoteYoichi KawaiMasaki Misumi
    • C08K3/22C08K5/52C08K5/527C08L23/10
    • C08K3/22C08K5/527
    • A polypropylene resin composition which is excellent in transparency and which shows very low pH reduction of the extract obtained in a promoted hot water-extraction test of a polypropylene resin which has been irradiated with radiant rays for sterilization. The polypropylene resin composition comprises 100 parts by weight of a polypropylene resin, 0.01 to 1.0 part by weight of a metal diarylphosphate represented by the following general formula (I): ##STR1## (wherein R.sub.1 and R.sub.2 each represents a hydrogen atom or an alkyl group; M represents an alkali metal or an alkaline earth metal; n is an integer of 1 or 2; and A represents an alkylidene group); and 0,001 to 1.0 part by weight of a hydroxide of an alkali metal, an alkaline earth metal or an element of the aluminum group. The polypropylene resin composition is suitable for use in making medical instruments, containers for foods or the like.
    • 一种聚丙烯树脂组合物,其透明度优异,并且在用辐射线照射灭菌的聚丙烯树脂的促进热水提取试验中获得的提取物的pH降低非常低。 聚丙烯树脂组合物包含100重量份的聚丙烯树脂,0.01-1.0重量份由以下通式(I)表示的金属二芳基磷酸酯:其中R 1和R 2各自表示氢原子或烷基 基团; M表示碱金属或碱土金属; n为1或2的整数; A表示亚烷基); 和0.001-1.0重量份的碱金属,碱土金属或铝基元素的氢氧化物。 聚丙烯树脂组合物适用于制造医疗器械,食品容器等。