发明公开
EP2072586A1 Coated pipes having improved mechanical properties and a method of production thereof
审中-公开
涂层管具有改进的机械性能及其生产方法
- 专利标题： Coated pipes having improved mechanical properties and a method of production thereof
- 专利标题（中）： 涂层管具有改进的机械性能及其生产方法
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申请号： EP07024736.6申请日： 2007-12-20
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公开(公告)号： EP2072586A1公开(公告)日： 2009-06-24
- 发明人: Anker, Martin , Fredriksen, Siw Bodil , Bentzrod, Pal Christian , Bäckman, Mats , Leiden, Leif , Vahteri, Markku , Rekonen, Petri
- 申请人： Borealis Technology Oy
- 申请人地址： P.O. Box 330 06101 Porvoo FI
- 专利权人： Borealis Technology Oy
- 当前专利权人： Borealis Technology Oy
- 当前专利权人地址： P.O. Box 330 06101 Porvoo FI
- 代理机构： Kador & Partner
- 主分类号： C09D123/06
- IPC分类号： C09D123/06 ; C08L23/08
摘要：
The present invention deals with coated pipes having a layer of multimodal polyethylene. The multimodal ethylene copolymer is a copolymer of ethylene with one or more alpha-olefin comonomers having from 6 to 10 carbon atoms and has a weight average molecular weight of from 70000 g/mol to 250000 g/mol, a melt index MFR 2 of from 0.05 g/10 min to 5 g/10 min, a melt index MFR 5 of from 0.5 to 10 g/10 min and a density of from 930 kg/m 3 to 950 kg/m 3 . It has good mechanical properties in a wide range of service temperature and especially a high resistance against stress cracking.
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