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    Radiation-crosslinked polyolefin compositions
    1.
    发明公开
    Radiation-crosslinked polyolefin compositions 有权
    Strahlungsvernetzte Polyolefinzusammensetzungen

    公开(公告)号：EP1688458A1

    公开(公告)日：2006-08-09

    申请号：EP05111232.4

    申请日：2005-11-24

    申请人： ShawCor Ltd.

    发明人： Jackson, Peter ,  Heydrich, Marcus P. ,  Schnuelle, Karen

    IPC分类号： C08L23/00

    CPC分类号： C08L23/00 ,  C08L23/06 ,  C08L23/0815 ,  C08L23/10 ,  C08L23/16 ,  C08L2312/06 ,  Y10S522/906 ,  C08L2666/06 ,  C08L2666/02

    摘要： An article suitable for use as an insulating or coating material comprises a radiation-crosslinked composition comprising a polyethylene, a polypropylene and optionally an ethylene-propylene elastomer. The polyethylene component is selected from high density polyethylene (HDPE), medium density polyethylene (MDPE) and linear medium density polyethylene (LMDPE) and the polypropylene component is either a homopolymer or copolymer. The composition is predominantly based on the polyethylene component and contains the polyethylene component in an amount of at least 50 percent by weight. The article is radiation-crosslinked to a sufficient degree that it possesses thermoset properties, such that when the article is heated to a temperature above the crystalline melting point of the polypropylene homopolymer or copolymer, it is softened but does not become liquid. The article is formed by first blending the polyethylene, polypropylene and optionally the ethylene-propylene elastomer, melt processing the blend to produce an article, crosslinking the article by exposing it to radiation, and optionally heating, stretching and cooling the article to impart heat shrinkability to the article.

    摘要翻译： 适合用作绝缘或涂层材料的制品包括包含聚乙烯，聚丙烯和任选的乙烯 - 丙烯弹性体的辐射交联组合物。 聚乙烯组分选自高密度聚乙烯（HDPE），中密度聚乙烯（MDPE）和线性中密度聚乙烯（LMDPE），聚丙烯组分是均聚物或共聚物。 组合物主要基于聚乙烯组分，并且含有至少50重量％的量的聚乙烯组分。 该物品具有足够的热辐射性能，使得当制品被加热到高于聚丙烯均聚物或共聚物的结晶熔点的温度时，它被软化，但不变成液体。 该制品通过首先将聚乙烯，聚丙烯和任选的乙烯 - 丙烯弹性体共混而熔融加工以制备制品，通过将其暴露于辐射来交联制品，并任选地加热，拉伸和冷却制品以赋予热收缩性 到文章。

    Moisture-crosslinked polyolefin compositions
    3.
    发明公开
    Moisture-crosslinked polyolefin compositions 有权
    Feuchtigkeitsvernetzte Polyolefinzusammensetzungen

    公开(公告)号：EP2226355A2

    公开(公告)日：2010-09-08

    申请号：EP10250352.1

    申请日：2010-02-26

    申请人： ShawCor Ltd.

    发明人： Jackson, Peter ,  Heydrich, Marcus P.

    IPC分类号： C08L23/00

    CPC分类号： C08L23/10 ,  C08L23/02 ,  C08L23/0853 ,  C08L23/0869 ,  C08L23/16 ,  C08L23/22 ,  C08L51/06 ,  C08L53/02 ,  C08L2205/03 ,  C08L2314/06 ,  H01B3/441 ,  C08L2666/24 ,  C08L2666/02 ,  C08L2666/04

    摘要： Moisture-crosslinkable polymer compositions and moisture-crosslinked articles prepared therefrom are prepared from a composition predominantly comprising an ethylene-based polyolefin and a propylene-based polyolefin, in which both the ethylene-based and propylene-based polyolefins are present in amounts of less than 50% by weight. The composition also includes hydrolysable silane groups, which may be grafted onto the ethylene-based polyolefin, or a blend of the ethylene-based and propylene-based polyolefins, in the presence of a free radical initiator. The moisture-crosslinked articles further comprise a silanol condensation catalyst to permit the silane groups to form crosslinks in the presence of moisture. After crosslinking, the article may be heated, stretched and then cooled to render it heat shrinkable.

    摘要翻译： 由其制备的水分交联聚合物组合物和水分交联的制品由主要包含乙烯基聚烯烃和丙烯基聚烯烃的组合物制备，其中乙烯基和丙烯基聚烯烃的存在量小于 50重量％。 组合物还包括可水解的硅烷基团，其可以在自由基引发剂的存在下接枝到乙烯基聚烯烃上，或者基于乙烯和基于丙烯的聚烯烃的共混物。 湿气交联制品还包含硅烷醇缩合催化剂，以允许硅烷基团在水分存在下形成交联。 交联后，可以将制品加热，拉伸然后冷却以使其热收缩。