Invention Grant
US08729189B2 Propylene-based block copolymer, composition containing the copolymer, and molded products obtained therefrom
有权
丙烯系嵌段共聚物,含有共聚物的组合物和由其得到的成型体
- Patent Title: Propylene-based block copolymer, composition containing the copolymer, and molded products obtained therefrom
- Patent Title (中): 丙烯系嵌段共聚物,含有共聚物的组合物和由其得到的成型体
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Application No.: US13120031Application Date: 2009-09-17
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Publication No.: US08729189B2Publication Date: 2014-05-20
- Inventor: Kazuhisa Matsunaga , Keita Itakura
- Applicant: Kazuhisa Matsunaga , Keita Itakura
- Applicant Address: JP Tokyo
- Assignee: Mitsui Chemicals, Inc.
- Current Assignee: Mitsui Chemicals, Inc.
- Current Assignee Address: JP Tokyo
- Agency: Foley & Lardner LLP
- Priority: JP2008-242799 20080922
- International Application: PCT/JP2009/066274 WO 20090917
- International Announcement: WO2010/032793 WO 20100325
- Main IPC: C08F8/00
- IPC: C08F8/00 ; C08G63/48 ; C08G63/91 ; C08L23/14 ; C08F10/06 ; C08F4/76 ; C08F293/00 ; C08L23/20

Abstract:
The present invention provides a propylene-based block copolymer having high melt viscoelasticity, excellent balance between rigidity and impact resistance, good molding processability, and excellent 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) (the total amount of the Dsol and the Dinsol is 100% by weight), and satisfies the requirements [1] to [3]: [1] the molecular weight distribution (Mw/Mn) of the Dsol is 7.0 to 30, [2] the molecular weight distribution (Mw/Mn) of the Dinsol is 7.0 to 30, and Mz/Mw thereof is 6.0 to 20, and [3] the pentad fraction (mmmm) of the Dinsol is not less than 93%.
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