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发明公开
CN110012669A 双峰聚乙烯 审中-实审

双峰聚乙烯
摘要：
提供了各种双峰聚乙烯，包含但不限于用于管道的双峰聚乙烯，其具有0.9340到0.9470克/立方厘米(g/ccm)的密度、0.1到0.7克/10分钟的熔融指数(I2)、20到90的溶体流动比(I21/I2)。所述双峰聚乙烯包含高分子量聚乙烯组分和低分子量聚乙烯组分，其是在单个反应器中执行并采用双峰聚合催化剂体系的聚合方法的反应产物。所述双峰聚合催化剂体系包含摩尔比为3.0:1的双(2-五甲基苯基酰胺基)乙基)胺二苄基锆和(四甲基环戊二烯基)(正丙基环戊二烯基)二氯化锆或(四甲基环戊二烯基)(正丙基环戊二烯基)二甲基锆的双峰催化剂体系；以及处于为了调节双峰聚乙烯的熔体流动比而加入的庚烷中的(四甲基环戊二烯基)(正丙基环戊二烯基)二甲基锆微调催化剂。
摘要（英）：

Provided are various bimodal polyethylene, including but not limited to a bimodal polyethylene for a pipe having a density of from 0.9340 to 0.9470 gram/cubic centimeters (g/ccm), a melt index (I2) offrom 0.1 to 0.7 gram/10 minute, a melt flow ratio (I21/I2) of from 20 to 90. The bimodal polyethylene includes a high molecular weight polyethylene component and a low molecular weight polyethylene component which are a reaction product of a polymerization process performed in a single reactor and that employs a bimodal polymerization catalyst system. The bimodal polymerization catalyst system includes a bimodal catalyst system of bis(2-pentamethylphenylamido)ethyl)amine Zirconium dibenzyl and either (tetramethylcyclopentadienyl)(n-propylcyclopentadienyl)Zirconium dichloride or (tetramethylcyclopentadienyl)(n-propylcyclopentadienyl)zirconium dimethyl in a 3.0:1 molar ratio; and a trim catalyst of (tetramethylcyclopentadienyl)(n-propylcyclopentadienyl)Zirconium dichloridedimethyl in heptane added to adjust melt flow ratio of the bimodal polyethylene.

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