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发明授权
CN107841035B 一种聚丙烯组合物及其制备方法和应用 有权

一种聚丙烯组合物及其制备方法和应用
摘要：
本发明涉及聚丙烯材料领域，具体地，公开了一种聚丙烯组合物及其制备方法和应用。该聚丙烯组合物含有基础树脂、β成核剂、抗氧剂和色母粒，所述基础树脂含有均聚聚丙烯、第一乙烯丙烯共聚物以及任选的第二乙烯丙烯共聚物，所述第一乙烯丙烯共聚物的熔体质量流动速率为0.1‑0.7g/10min，乙烯重量含量为4‑14％，橡胶相重量含量为8‑22％，所述第二乙烯丙烯共聚物的熔体质量流动速率为0.4‑1.4g/10min，乙烯重量含量为12‑26％，橡胶相重量含量为26‑50％。采用本发明所述的聚丙烯组合物制备的管道的长期静液压热稳定性较高。
摘要（英）：

The invention specifically discloses a polypropylene composition and a preparation method and application thereof, belonging to the field of polypropylene materials. The polypropylene composition comprises base resin, a beta nucleating agent, an antioxidant and color masterbatch. The base resin contains homo-polypropylene, a first ethylene-propylene copolymer and an optional second ethylene-propylene copolymer, wherein the first ethylene-propylene copolymer has a melt mass flow rate of 0.1 to 0.7 g/10 min, an ethylene content of 4 to 14 wt% and a rubber phase content of 8 to 22 wt%; and the second ethylene-propylene copolymer has a melt mass flow rate of 0.4 to 1.4 g/10 min, an ethylene content of 12-26 wt%, and a rubber phase content of 26-50 wt%. A pipeline prepared from the polypropylene composition has high long-term hydrostatic thermal stability.

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