PROPYLENE-BASED BLOCK COPOLYMER AND COMPOSITION CONTAINING SAID COPOLYMER, AND MOLDED BODY OBTAINED THEREFROM
申请人:Mitsui Chemicals, Inc.
公开号:EP2330139A1
公开(公告)日:2011-06-08
To provide a propylene-based block copolymer which has high melt viscoelasticity, excellent balance between rigidity and impact resistance and goodmoldingprocessablility and is extremely excellent in its molded product appearance, a composition containing the copolymer and molded products obtained therefrom. The propylene-based block copolymer comprises 5 to 80% by weight of a room temperature n-decane-soluble portion (Dsol) and 20 to 95% by weight of a room temperature n-decane-insoluble portion (Dinsol), with the proviso that the total amount of the Dsol and the Dinsol is 100% by weight, and satisfies the following requirements [1] to [3] at the same time: [1] the molecular weight distribution (Mw/Mn) of the Dsol is not less than 7. 0 but not more than 30, [2] the molecular weight distribution (Mw/Mn) of the Dinsol is not less than 7.0 but not more than 30, and Mz/Mw thereof is not less than 6.0 but not more than 20, and [3] the pentad fraction (mmmm) of the Dinsol is not less than 93%.
提供一种丙烯基嵌段共聚物,它具有较高的熔体粘弹性,在刚性和抗冲击性之间具有极佳的平衡,具有良好的模塑加工性,并且在模塑产品外观方面极为出色,还提供一种含有该共聚物的组合物以及由此获得的模塑产品。丙烯基嵌段共聚物包括 5%至 80%(按重量计)的室温正癸烷可溶部分(Dsol)和 20%至 95%(按重量计)的室温正癸烷不溶部分(Dinsol),但条件是 Dsol 和 Dinsol 的总量为 100%(按重量计),并同时满足以下要求[1]至[3]:[1] Dsol 的分子量分布(Mw/Mn)不小于 7.0 但不大于 30,[2] Dinsol 的分子量分布(Mw/Mn)不小于 7.0 但不大于 30,其 Mz/Mw 不小于 6.0 但不大于 20,[3] Dinsol 的 pentad 分数(mmm)不小于 93%。