发明申请
- 专利标题: Pressure Pipes and Polyolefin Composition for the Manufacture Thereof
- 专利标题(中): 压力管和聚烯烃组合物的制造
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申请号: US13139473申请日: 2009-12-24
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公开(公告)号: US20110245427A1公开(公告)日: 2011-10-06
- 发明人: Claudio Cavalieri , Monica Galvan , Enrico Beccarini
- 申请人: Claudio Cavalieri , Monica Galvan , Enrico Beccarini
- 申请人地址: IT Milano
- 专利权人: BASELL POLIOLEFINE ITALIA S.R.L.
- 当前专利权人: BASELL POLIOLEFINE ITALIA S.R.L.
- 当前专利权人地址: IT Milano
- 优先权: EP08172924.6 20081224
- 国际申请: PCT/EP09/67925 WO 20091224
- 主分类号: C08L23/14
- IPC分类号: C08L23/14 ; F16L9/00
摘要:
Articles, particularly pressure pipes, having high strength as well as high stiffness and very good impact resistance even at low temperatures can be obtained by using a heterophasic polyolefin composition comprising (percent by weight) 70-90% of a random copolymer of propylene with 0.5-6% of 1-hexene, and 10-30% of a polymer of ethylene with a C3-C10 α-olefin and optionally a diene, wherein the polymer of ethylene has an ethylene content higher than 45% and an intrinsic viscosity [η] value from 3 to 5 dl/g.A particular advantage of the present invention is that articles comprising the above heterophasic polyolefin composition show a low ductile to brittle transition temperature (DBTT).