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发明授权
CN101568586B 聚乙烯组合物、其制备方法以及由其制成的制品 有权

聚乙烯组合物、其制备方法以及由其制成的制品
摘要：
本发明涉及适于制造具有优异性能的管材和其它制品的组合物。本发明提供了一种组合物，其包括共混物，其中所述共混物包含高分子量基于乙烯的互聚物和低分子量基于乙烯的互聚物，并且所述高分子量基于乙烯的互聚物是非均匀支化线型或均匀支化线型基于乙烯的互聚物，密度为0.922g/cc～0.929g/cc，高负荷熔体流动指数(I21)为0.2g/10min至1.0g/10min；而且所述低分子量基于乙烯的互聚物是非均匀支化线型或均匀支化线型基于乙烯的互聚物，密度为0.940g/cc至0.955g/cc，熔体指数(I2)为6g/10min至50g/10min。所述共混物在高于30℃洗脱的ATREF曲线中具有单峰，并且在log(计算Mv)与洗脱温度的关系中粘均分子量系数(CMv)小于-0.0032，所述CMv是在洗脱温度范围70℃～90℃内计算的。所述Mv为粘均分子量。
摘要（英）：

The invention is related to compositions suitable for the fabrication of pipes, and other articles, with excellent performance properties. The invention provides a composition, comprising a blend, wherein said blend comprises a high molecular weight ethylene-based interpolymer and a low molecular weight ethylene-based interpolymer, and the high molecular weight ethylene-based interpolymer is a heterogeneously branched linear or a homogeneously branched linear ethylene-based interpolymer, and has a density from 0.922 g/cc to 0.929 g/cc, and a high load melt index (I21) from 0.2 g/10 min to 1.0g/10 min, and the low molecular weight ethylene-based interpolymer is heterogeneously branched linear or a homogeneously branched linear ethylene-based interpolymer, and has a density from 0.940 g/ccto 0.955 g/cc, and a melt index (I2) from 6 g/10 min to 50 g/10 min. The blend has a single peak in an ATREF profile eluting above 30 DEG C., and has a coefficient of viscosity average molecular weight (CMv) less than -0.0032 in the log(calculated Mv) versus elution temperature, said CMv calculated in the range of elution temperatures from 70 DEG C. to 90 DEG C.. The Mv is the viscosity average molecular weight.

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