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    • 142. 发明授权
    • Thermoplastic resin composition improved in terms of prevention of mold
contamination
    • 热塑性树脂组合物在防止霉菌污染方面得到改善
    • US5889099A
    • 1999-03-30
    • US804403
    • 1997-02-21
    • Takayuki NagaiToshio NiimiYukihito ZankaIkuo TsutsumiHiroki Sato
    • Takayuki NagaiToshio NiimiYukihito ZankaIkuo TsutsumiHiroki Sato
    • C08K3/34C08K5/00C08K5/098C08K5/17C08K5/526C08L53/00C08J5/10C08L23/16
    • C08K5/005C08L53/00
    • A thermoplastic resin composition improved in terms of prevention of mold contamination, comprising the following components (A) to (G):component (A): 55 to 75% by weight of a propylene-ethylene block copolymer including a propylene homopolymer moiety having a melt flow rate of 15 to 50 g/10 min. and an isotactic pentad fraction of at least 0.97, said block copolymer having a melt flow rate of 10 to 30 g/10 min. and an ethylene content of 2 to 6% by weight,component (B): 0 to 10% by weight of an ethylene-propylene copolymer rubber having a melting temperature of 30.degree. to 60.degree. C. and a melt flow rate of 0.2 to 2 g/10 min.,component (C): 5 to 15% by weight of an ethylene-.alpha.-olefin copolymer rubber having a melting temperature of 60.degree. to 100.degree. C. and a melt flow rate of 0.3 to 2 g/10 min.,component (D): 15 to 25% by weight of a talc having an average particle diameter of up to 5 .mu.m and a specific surface area of at least 3.5 m.sup.2 /g,the total amount of components (A) to (D) being 100% by weight,component (E): 0.05 to 2 parts by weight of a hindered amine having a structure represented by the following formula (I): ##STR1## component (F): 0.01 to 1 part by weight of a triaryl phosphite, and component (G): 0.05 to 4 parts by weight of a metal salt represented by the following general formula (VIII):(RCOO).sub.2 X (VIII)wherein R is a monovalent hydrocarbon group having a molecular weight of 290 to 500, and X is zinc, magnesium or calcium,the respective amounts of components (E) to (G) being based on 100 parts by weight of the sum of components (A) to (D).
    • 包含以下组分(A)至(G))的组分(A):55至75重量%的包含丙烯均聚物部分的丙烯 - 乙烯嵌段共聚物,其具有 熔体流动速率为15〜50g / 10min。 和全同立构五单元组分数至少为0.97,所述嵌段共聚物的熔体流动速率为10至30g / 10min。 乙烯含量为2〜6重量%,成分(B):0〜10重量%的熔融温度为30〜60℃的乙烯 - 丙烯共聚物橡胶,熔体流动速率为0.2〜 2g / 10分钟,成分(C):5〜15重量%的熔融温度为60〜100℃的乙烯-α-烯烃共聚物橡胶,熔体流动速率为0.3〜2g / 10分钟,成分(D):15〜25重量%的平均粒径为5μm以下,比表面积为3.5m 2 / g以上的滑石,成分(A)的总量 至(D)为100重量%,组分(E):0.05-2重量份具有由下式(I)表示的结构的受阻胺:亚磷酸三芳基酯的重量和组分(G):0.05 至4重量份由以下通式(VIII)表示的金属盐:(RCOO)2 X(VIII)其中R是分子量为290至500的一价烃基,X为锌,镁 (E)至(G)的各自的量基于100重量份的组分(A)至(D)的总和。