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公开(公告)号:US20230022904A1
公开(公告)日:2023-01-26
申请号:US17756997
申请日:2020-11-18
发明人: Matthew W. HOLTCAMP , Matthew S. BEDOYA , Timothy M. BOLLER , Hasnain RANGWALLA , David F. SANDERS , Ching-Tai LUE , Dongming LI , Adriana S. SILVA , Ru XIE , Joseph A. MOEBUS
IPC分类号: C08F210/16
摘要: A polyethylene comprising of ethylene derived units and 0.5 wt % to 10 wt % C3 to C12 α-olefin derived units may be synthesized using a mixed catalyst that comprises rac-dimethylsilylbis(tetrahydroindenyl)zirconium dichloride and a zirconium co-catalyst in a mole ratio of 50:50 to 90:10, and wherein the zirconium co-catalyst is a poor comonomer incorporator as compared to the rac-dimethylsilylbis(tetrahydroindenyl)zirconium dichloride catalyst. Such a polyethylene may have a density of 0.91 g/cm3 to 0.93 g/cm3, an I2 value of 0.5 g/10 min to 2 g/10 min, an I21 value of 25 g/10 min to 75 g/10 min, an I21/I2 ratio of 25 to 75, a molar reversed-co-monomer index (RCI,m) of 30 to 180, a phase angle equal or lower than 70° at complex modulus G* of 10,000 Pa, a Θ2 of 1.5 radians to −1.5 radians, and a low density population of 50% and 70% by weight of the polyethylene.