发明授权
US07858708B2 Propylene-ethylene-butene block copolymer and molded article thereof
有权
丙烯 - 乙烯 - 丁烯嵌段共聚物及其模塑制品
- 专利标题: Propylene-ethylene-butene block copolymer and molded article thereof
- 专利标题(中): 丙烯 - 乙烯 - 丁烯嵌段共聚物及其模塑制品
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申请号: US12064647申请日: 2006-08-29
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公开(公告)号: US07858708B2公开(公告)日: 2010-12-28
- 发明人: Hideki Oshima , Takashi Sanada , Kazuki Wakamatsu
- 申请人: Hideki Oshima , Takashi Sanada , Kazuki Wakamatsu
- 申请人地址: JP Tokyo
- 专利权人: Sumitomo Chemical Company, Limited
- 当前专利权人: Sumitomo Chemical Company, Limited
- 当前专利权人地址: JP Tokyo
- 代理机构: Sughrue Mion, PLLC
- 优先权: JP2005-248848 20050830
- 国际申请: PCT/JP2006/317404 WO 20060829
- 国际公布: WO2007/026912 WO 20070308
- 主分类号: C08F255/04
- IPC分类号: C08F255/04 ; C08F255/02
摘要:
A propylene-ethylene-butene block copolymer is provided which includes from 60 to 85% by weight of a polypropylene portion and from 15 to 40% by weight of a propylene-ethylene-butene random copolymer portion, wherein the copolymer satisfies the requirements (1) and (2) given below. In addition, a molded article including such a propylene-ethylene-butene block copolymer is provided.(1) The random copolymer portion includes a propylene-ethylene random copolymer component (EP) and a propylene-ethylene-butene random copolymer component (EPB) and the copolymer component (EP) has an intrinsic viscosity of from 1.5 to 8 dl/g and an ethylene unit content of from 20 to 50% by weight, and the copolymer component (EPB) has an intrinsic viscosity of from 0.5 to 8 dl/g, an ethylene unit content of from 47 to 77% by weight and a butene unit component of from 3 to 33% by weight and the total of the ethylene unit content and the butene unit content is from 50 to 80% by weight.(2): The propylene-ethylene-butene block copolymer has a melt flow rate of from 5 to 120 g/10 min.