Coated pipes having improved mechanical properties and a method of production thereof
    22.
    发明公开
    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

    公开(公告)号:EP2072586A1

    公开(公告)日:2009-06-24

    申请号:EP07024736.6

    申请日:2007-12-20

    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.

    摘要翻译: 本发明与具有多峰聚乙烯层的涂层管的交易。 所述多峰乙烯共聚物是与一种或多种具有6-10个碳原子的多种α-烯烃共聚单体的乙烯的共聚物,并且具有70,000克/摩尔的重均分子量至250,000克/摩尔,从熔融指数MFR 2的 0点05克/ 10分钟至5克/ 10分钟,熔体指数MFR 5为0.5至10克/ 10分钟和930千克/米3至950千克/米3的密度。 它在宽范围的使用温度和爱尤其是对应力的高电阻裂纹的良好的机械性能。

    Polymer composition for injection molding
    28.
    发明公开
    Polymer composition for injection molding 无效
    注塑用聚合物组合物

    公开(公告)号:EP1655335A1

    公开(公告)日:2006-05-10

    申请号:EP04026096.0

    申请日:2004-11-03

    IPC分类号: C08L23/04 C08L23/06 C08F10/02

    摘要: The application relates to a polyethylene composition having a base resin, the base resin comprising

    (A) a first polyethylene fraction, and
    (B) a second polyethylene fraction,

    wherein the melt flow rate MFR 5/190°C of the first fraction is higher than the melt flow rate MFR 5/190°C of the second fraction, the flow rate ratio FRR 21/5 of the polyethylene composition, defined as the ratio of melt flow rate MFR 21.6/190°C to melt flow rate MFR 5/190°C , is within the range of 15-28, and the melt flow rate MFR 5/190°C of the polyethylene composition is within the range of 0.5-1.1 g/10 min.

    摘要翻译: 本申请涉及具有基础树脂的聚乙烯组合物,所述基础树脂包含(A)第一聚乙烯部分和(B)第二聚乙烯部分,其中第一部分的熔体流动速率MFR 5/190℃高于 第二部分的熔体流动速率MFR5 / 190℃,聚乙烯组合物的流动速率比FRR21 / 5定义为熔体流动速率MFR21.6 / 190℃与熔体流动速率MFR5 / 190℃之比 在15-28的范围内,并且聚乙烯组合物的熔体流动速率MFR 5/190℃在0.5-1.1g / 10min的范围内。