PROTECTIVE POLYMER LAYER
    12.
    发明申请
    PROTECTIVE POLYMER LAYER 有权
    保护聚合物层

    公开(公告)号:US20140312100A1

    公开(公告)日:2014-10-23

    申请号:US14239554

    申请日:2012-06-01

    IPC分类号: B23K37/00 C23C28/00

    摘要: The present invention relates to a method of joining polymer coated steel pipes comprising the steps of providing polymer coated pipe segments with an uncoated length on both ends of the segments; welding the polymer coated pipe segments together; applying a curable polymer (A) onto the uncoated length of the welded pipe segments to form an first coating layer; and applying a polymer composition (B) onto the first coating layer to form a topcoat layer with a thickness of 0.5 to 10 mm, wherein the polymer composition (B) has a melt flow rate MFR2 of 1.0 to 6.0 g/10 min, determined according to ISO 1133 at a temperature of 190° C. under a load of 2.16 kg, and includes a base resin comprising (B-1) a non-elastomeric polyethylene in an amount of 60 to 85 wt % of the total polymer composition being produced in a process using a single-site catalyst, and (B-2) an elastomer comprising a copolymer of ethylene and at least one polar comonomer, wherein component (B-1) or components (B-1) and (B-2) have been grafted with an acid grafting agent and the use of polymer composition (B) as topcoat layer with a thickness of 0.5 to 10 mm in a coating of coated steel pipe field-joints, a method of coating a steel pipe and the use of polymer composition (B) for the coating of steel pipe joints or steel pipes.

    摘要翻译: 本发明涉及一种连接聚合物涂层钢管的方法,包括以下步骤:在段的两端提供具有未涂覆长度的聚合物涂覆的管段; 将聚合物涂层管段焊接在一起; 将可固化聚合物(A)施加到焊接管段的未涂覆长度上以形成第一涂层; 并将聚合物组合物(B)施加到第一涂层上以形成厚度为0.5至10mm的面涂层,其中聚合物组合物(B)的熔体流动速率MFR 2为1.0至6.0g / 10min,测定 根据ISO 1133,在2.16kg的负荷下,在190℃的温度下,并且包括基础树脂,其包含(B-1)总聚合物组合物的60至85重量%的非弹性聚乙烯,其为 (B-2)和包含乙烯与至少一种极性共聚单体的共聚物的弹性体,其中组分(B-1)或组分(B-1)和(B-2) )已经用酸接枝剂接枝,并且在涂层钢管现场接头的涂层中使用聚合物组合物(B)作为面层涂层,厚度为0.5至10mm,涂覆钢管的方法和使用 的聚合物组合物(B)用于钢管接头或钢管的涂覆。

    Method of coating pipes or pipe sections
    14.
    发明授权
    Method of coating pipes or pipe sections 有权
    管道或管道部分的涂覆方法

    公开(公告)号:US09550210B2

    公开(公告)日:2017-01-24

    申请号:US13496795

    申请日:2010-09-16

    摘要: The present publication discloses a method for coating pipes. The method comprises applying curable first polymer (e.g. epoxy) onto the surface of the pipe and partially curing the first polymer or leaving the first polymer uncured to in order to form a reactive first polymer layer. Thereafter, the pipe with the reactive first polymer layer is heated and a second polymer (e.g. polyolefin) is applied directly onto the heated reactive first polymer layer, whereby the two polymers react and form a protective coating on the pipe or pipe section. In particular, the heating can be carried out in two steps such that the first polymer stays reactive until the application of the second polymer.

    摘要翻译: 本公开公开了一种涂覆管道的方法。 该方法包括将可固化的第一聚合物(例如环氧树脂)施加到管的表面上并部分固化第一聚合物或使第一聚合物未固化以形成反应性第一聚合物层。 此后,加热具有反应性第一聚合物层的管,并将第二聚合物(例如聚烯烃)直接施加到加热的反应性第一聚合物层上,由此两种聚合物在管或管部分上反应并形成保护涂层。 特别地,加热可以在两个步骤中进行,使得第一聚合物保持反应性直到施加第二聚合物。

    Coating composition
    18.
    发明授权
    Coating composition 有权
    涂料组成

    公开(公告)号:US06645588B1

    公开(公告)日:2003-11-11

    申请号:US09624279

    申请日:2000-07-24

    IPC分类号: F16L9147

    摘要: Conventional coating compositions have the disadvantage of being insufficiently coatable and having an unsatisfactory environmental stress cracking resistance. Now a coating composition has been found which has both good coating processability and environmental stress cracking resistance. It comprises a multimodal ethylene polymer, which contains from 80 to 100% by weight of ethylene repeating units and from 0 to 20% by weight of C3-C10 &agr;-olefin repeating units, has a density of between 0.915 g/cm3 and 0.955 g/cm3, and is a blend of at least a first ethylene polymer having a first average molecular weight and a first molecular weight distribution and a second ethylene polymer having a second average molecular weight, which is higher than said first average molecular weight, and a second molecular weight distribution, said blend having a third average molecular weight and a third molecular weight distribution.

    摘要翻译: 常规涂料组合物的缺点是可涂覆性不足,并且具有不令人满意的耐环境应力开裂性。 现在已经发现涂料组合物具有良好的涂覆加工性和耐环境应力开裂性。 其包含多峰乙烯聚合物,其含有80至100重量%的乙烯重复单元和0至20重量%的C 3 -C 10α-烯烃重复单元,其密度为0.915g / cm 3 和0.955g / cm 3,并且是至少具有第一平均分子量和第一分子量分布的第一乙烯聚合物和具有第二平均分子量的第二乙烯聚合物的共混物,其具有高于所述第一 平均分子量和第二分子量分布,所述共混物具有第三平均分子量和第三分子量分布。