Pipe having improved high temperature resistance
    4.
    发明公开
    Pipe having improved high temperature resistance 有权
    Rohr mit verbesserterHochtemperaturbeständigkeit

    公开(公告)号:EP1927627A1

    公开(公告)日:2008-06-04

    申请号:EP06024951.3

    申请日:2006-12-01

    IPC分类号: C08L23/06 C08L23/08 F16L9/12

    摘要: The present invention relates to a pipe made of a polyethylene composition comprising a polyethylene base resin, which comprises
    c. an ethylene copolymer as fraction (A), and
    d. an ethylene homo- or copolymer as fraction (B),
    with fraction (A) having a lower molecular weight than fraction (B), wherein the polyethylene base resin is obtainable in a polymerisation process in which a single-site catalyst (SSC) is used in the polymerisation of at least one of fractions (A) and (B), the base resin having
    (i) a density of below 940 kg/m 3 ,
    and
    (ii) a MFR 5 at 190 °C / 5.00 kg of at least 0.20 g/10 min, and
    the polyethylene composition having a time to failure of at least 250 h measured according to ISO 1167 at 95°C and 4.3 MPa.

    摘要翻译: 本发明涉及一种由包含聚乙烯基树脂的聚乙烯组合物制成的管,其包括c。 作为级分(A)的乙烯共聚物,和d。 作为级分(B)的乙烯均聚物或共聚物,其中馏分(A)的分子量低于馏分(B)的分子量,其中聚乙烯基础树脂可以在其中单位点催化剂(SSC)为 用于聚合馏分(A)和(B)中的至少一种,基础树脂具有(i)密度低于940kg / m 3,和(ii)190℃/ 5.00kg的MFR 5 至少0.20g / 10min,并且根据ISO 1167在95℃和4.3MPa下测量的聚乙烯组合物具有至少250小时的破坏时间。

    A crosslinked ethylene polymer pressure pipe and a method for the preparation thereof
    5.
    发明公开
    A crosslinked ethylene polymer pressure pipe and a method for the preparation thereof 有权
    Vernetztes Druckrohr aus聚乙烯和Verfahren zu seiner Herstellung

    公开(公告)号:EP1574772A1

    公开(公告)日:2005-09-14

    申请号:EP04445027.8

    申请日:2004-03-12

    IPC分类号: F16L9/12

    CPC分类号: F16L9/12 Y10T428/139

    摘要: A crosslinked ethylene polymer pressure pipe and a method for the preparation thereof are described. The pipe is characterised in that it comprises an ethylene polymer with a density of less than 950 kg/m 3 obtained by polymerisation with a single-site catalyst and having a shear thinning index, SHI 5/300 of less than 20 and a MWD of

    摘要翻译: 描述了一种交联乙烯聚合物压力管及其制备方法。 该管的特征在于其包含通过用单中心催化剂聚合而获得的具有小于950kg / m 3的密度的乙烯聚合物,并且具有剪切稀化指数,小于20的SHI5 / 300和MWD 的<10。 该方法的特征在于它包括将乙烯(任选地与至少一种共聚单体)一起聚合到单中心催化剂中以提供上述限定的乙烯聚合物,通过挤出和交联将乙烯聚合物形成管。