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Metallocene catalyst systems with chemically-treated solid oxides for producing ethylene-based plastomers and elastomers
Metallocene catalyst systems with chemically-treated solid oxides for producing ethylene-based plastomers and elastomers
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机译:具有化学处理的固体氧化物的茂金属催化剂体系,用于生产乙烯基塑性体和弹性体
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摘要
Polymerization processes for producing ethylene-based plastomers and elastomers having densities less than 0.91 g/cm3 utilize a metallocene-based catalyst system containing a chemically-treated solid oxide. These polymerization processes can be conducted in a slurry reactor, a solution reactor, and/or a gas phase reactor. Ethylene polymers produced from the polymerization process can be characterized by a density of less than 0.91 g/cm3, a CY-a parameter of less than 0.2, and a ratio of HLMI/MI of at least 30, or a density less than 0.91 g/cm3, a CY-a parameter from 0.25 to 0.75, and a ratio of Mw/Mn from 2 to 3.
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机译:用于制备乙烯类塑性体的聚合方法和具有小于0.91g / cm 3的密度的弹性体利用含有化学处理的固体氧化物的茂金属类催化剂体系。 这些聚合方法可以在浆料反应器,溶液反应器和/或气相反应器中进行。 由聚合方法制备的乙烯聚合物可具有小于0.91g / cm3的密度小于0.91g / cm 3,小于0.2的Cy-a参数,以及至少30的Hlmi / mi的比例,或密度小于0.91g / cm3,Cy-A参数为0.25至0.75,以及2至3的MW / Mn的比率。
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