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    • 24. 发明申请
    • POLYETHYLENE COMPOSITION FOR PIPE AND PIPE COATING APPLICATIONS
    • 用于管道和管道涂层应用的聚乙烯组合物
    • WO2015051881A1
    • 2015-04-16
    • PCT/EP2014/002590
    • 2014-09-24
    • BOREALIS AG
    • BURYAK, AndreySTUBENRAUCH, Kurt
    • C08F2/00C09D123/06C09D123/08C08L23/06C08L23/08
    • C08F10/02C08F110/02C08L23/06C08L23/0815C09D123/06C09D123/0815C08F210/16C08F4/6555C08F4/6546C08F4/6492C08F2/001C08F4/025C08F210/08C08F2500/12C08F2500/03C08F2500/16C08F2500/07
    • The present application relates to a polyethylene composition comprising a base resin being a copolymer of ethylene with at least one alpha olefin comonomer having from 3 to 12 carbon atoms, the base resin having a density of more than 940.0 kg/m 3 and equal to or less than 952.5 kg/m 3 , determined according to ISO 1 183-1:2004, wherein the composition has a melt flow rate MFR5 (190°C, 5 kg) of 0.10 to 3.0 g/10min, determined according to ISO 1 133, a storage modulus of G' (2 kPa) of 600 Pa to 900 Pa, a shear thinning index SHI 2.7/210 of 20 to 50 and the composition has an elongation at break (EB) at -45°C in dependence of the molar comonomer content (mol. CC) of the base resin following the following equation EB [%] ≥ 175 [% / mol%] ⋅ mol. CC [mol%], whereby the elongation at break (EB) is determined according to ISO 527- 1 at a temperature of -45°C and the molar comonomer content (mol. CC) reflects the molar content of alpha-olefin comonomer units in the total content of monomer units of the base resin, an article comprising such a polyethylene composition and the use of such a polyethylene composition for the production of an article.
    • 本申请涉及一种聚乙烯组合物,其包含基础树脂,其是乙烯与至少一种具有3至12个碳原子的α-烯烃共聚单体的共聚物,所述基础树脂的密度大于940.0kg / m 3且等于或小于 根据ISO 1 183-1:2004确定的952.5kg / m 3,其中该组合物的熔体流动速率MFR5(190℃,5kg)为0.10-3.0g / 10min,根据ISO 1 133测定,a G'(2kPa)的储能模量为600Pa至900Pa,剪切稀化指数SHI2.7 / 210为20至50,组合物在-45℃下的断裂伸长率(EB)根据摩尔 基础树脂的共聚单体含量(摩尔CC)按照以下等式EB [%]≥175[%/ mol%]∙mol。 CC [mol%],其中在-45℃的温度下根据ISO 527-1测定断裂伸长率(EB),共聚单体摩尔含量(mol CC)反映了α-烯烃共聚单体单元的摩尔含量 在基础树脂的单体单元的总含量中,包含这种聚乙烯组合物的制品以及使用这种聚乙烯组合物来制造制品。