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    • 7. 发明申请
    • METALLOCENE-PRODUCED VERY LOW DENSITY POLYETHYLENES OR LINEAR LOWDENSITY POLYETHYLENES AS IMPACT MODIFIERS
    • 金属生产非常低密度聚乙烯或线性低密度聚乙烯作为冲击改性剂
    • WO2003000790A1
    • 2003-01-03
    • PCT/US2002/018688
    • 2002-06-11
    • EXXONMOBIL CHEMICAL PATENTS, INC.DUNAWAY, David, B.
    • DUNAWAY, David, B.
    • C08L23/08
    • C08L23/0815B32B27/32C08L23/10C08L33/10C08L2314/06C08L2666/04C08L2666/06
    • In one embodiment, the present invention is directed to an article, such as a blow-molded bottle, formed from a polymer blend composition. In one aspect, the article is formed by blow-molding techniques. In one aspect, the article is a blow-molded container having a Bruceton Mean Drop Height of 3.8 feet or above. In another aspect, the article is a blow-molded container having a volume of 60 fluid ounces or greater. In general, the polymer blend compositiorl comprises polypropylene and an impact modifier of metallocene-produced very low density polyethylene or linear low density polyethylene. In one embodiment, the polypropylene polymer comprises a random copolymer. In one embodiment, the metallocene-catalyzed linear very low density polyethylene polymer has one or more of the following: (a) a density of less than 0.916 g/cm3, (b) a composition distribution breadth index of 50 to 85% by weight, (c ) a molecular weight distribution Mw/Mn of 2.0 to 3.0, (d) a molecular weight distribution Mz/Mw of less than 2.0, and (e) two peaks in a TREF measurement. In one embodiment, the polymer blend composition comprises 5% to 85% of the impact modifier and 95% to 15% of the polypropylene polymer, based on the total combined weight of the polypropylene polymer and the impact modifier. In another embodiment, the polymer blend composition comprises 5% to 35% of the impact modifier and 95% to 65% of the polypropylene polymer, based on the total combined weight of the polypropylene polymer and the impact modifier.
    • 在一个实施方案中,本发明涉及由聚合物共混组合物形成的制品,例如吹塑瓶。 在一个方面,制品通过吹塑技术形成。 在一个方面,制品是具有3.8英尺或以上的Bruceton Mean Drop Height的吹塑容器。 另一方面,制品是具有60流体盎司或更大的体积的吹塑容器。 通常,聚合物共混物组合物包括聚丙烯和茂金属生产的极低密度聚乙烯或线性低密度聚乙烯的抗冲改性剂。 在一个实施方案中,聚丙烯聚合物包含无规共聚物。 在一个实施方案中,茂金属催化的线性极低密度聚乙烯聚合物具有以下一种或多种:(a)小于0.916g / cm 3的密度,(b)组合物分布宽度指数为50至85重量% ,(c)2.0〜3.0的分子量分布Mw / Mn,(d)小于2.0的分子量分布Mz / Mw,(e)TREF测定中的两个峰。 在一个实施方案中,基于聚丙烯聚合物和抗冲改性剂的总组合重量,聚合物共混组合物包含5%至85%的抗冲改性剂和95%至15%的聚丙烯聚合物。 在另一个实施方案中,基于聚丙烯聚合物和抗冲改性剂的总组合重量,聚合物共混物组合物包含5%至35%的抗冲改性剂和95%至65%的聚丙烯聚合物。