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公开(公告)号:EP2067799A1
公开(公告)日:2009-06-10
申请号:EP07254717.7
申请日:2007-12-05
发明人: Eriksson Virginie , Vahteri Markku , Väänänen Marjo , Garoff Thomas , Hätönen Jari , Rekonen Petri , Fredriksen Siw Bodil , Nord-Varhaug, Katrin , Seim, marit , Nilsen, Jorunn , Helland, Irene
IPC分类号: C08F210/16 , C08F2/00 , C08F297/08
CPC分类号: C08L23/0815 , C08F210/16 , C08F297/08 , C08F297/083 , C08L53/00 , C08L2205/02 , C08F2/001 , C08L2666/06 , C08L2666/02 , C08F210/08 , C08F210/14 , C08F2500/12 , C08F2500/05 , C08F2500/26 , C08F2500/07
摘要: A multimodal linear low density polyethylene polymer having a final density of 900 to 940 kg/m 3 , and containing at least one α-olefin comonomer in addition to ethylene comprising:
(A) 30 to 60 wt% of a lower molecular weight component being an ethylene homopolymer or a copolymer of ethylene and at least one α-olefin;
and
(B) 70 to 40 wt% of a higher molecular weight component being a copolymer of ethylene and at least one α-olefin, said α-olefin being the same or different from any α-olefin used in component (A) but with the proviso that both components (A) and (B) are not polymers of ethylene and butene alone;
wherein the multimodal LLDPE has a dart drop of at least 700 g;
and wherein components (A) and (B) are obtainable using a Ziegler-Natta catalyst.摘要翻译: 一种多峰线型低密度聚乙烯聚合物,其最终密度为900至940kg / m 3,并且除乙烯外还包含至少一种α-烯烃共聚单体,其包含:(A)30至60重量%的较低分子量组分为 乙烯均聚物或乙烯与至少一种α-烯烃的共聚物; 和(B)70至40重量%的较高分子量组分是乙烯和至少一种α-烯烃的共聚物,所述的α-烯烃与组分(A)中使用的任何α-烯烃相同或不同,但与 条件是组分(A)和(B)都不是单独的乙烯和丁烯的聚合物; 其中所述多峰LLDPE具有至少700g的滴滴; 并且其中组分(A)和(B)可以使用齐格勒 - 纳塔催化剂获得。