发明申请
- 专利标题： PROCESS FOR COATING A PIPE WITH HIGH THROUGHPUT USING MULTIMODAL ETHYLENE COPOLYMER, AND COATED PIPES OBTAINED THEREOF
- 专利标题（中）： 使用多模乙烯共聚物涂覆高通量管的方法及其所得到的涂层管
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申请号： US12745804申请日： 2008-12-08
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公开(公告)号： US20100313986A1公开(公告)日： 2010-12-16
- 发明人: Mats Backman , Martin Anker , Siw Bodil Fredriksen , Leif Leiden , Markku Vahteri , Petri Rekonen
- 申请人： Mats Backman , Martin Anker , Siw Bodil Fredriksen , Leif Leiden , Markku Vahteri , Petri Rekonen
- 优先权： EP07024738.2 20071220
- 国际申请： PCT/EP08/10406 WO 20081208
- 主分类号： F16L9/14
- IPC分类号： F16L9/14 ; B05D3/10 ; B05D1/36 ; B05D1/00 ; C09D123/06 ; C08L23/08 ; C08L23/06
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 4 to 10 carbon atoms and has a weight average molecular weight of from 70000 g/mol to 250000 g/mol, the ratio of the weight average molecular weight to the number average molecular weight, Mw/Mn, of from 15 to 50, a melt index MFR2 of from 0.05 g/10 min to 5 g/10 min, a melt index MFR5 of from 0.5 to 10 g/10 min and a density of from 930 kg/m3 to 955 kg/m3. The pipes can be coated with high throughput and good production economy. The coatings have good mechanical properties.