Invention Grant
- Patent Title: Metallocene catalyst system for producing LLDPE copolymers with tear resistance and low haze
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Application No.: US17237119Application Date: 2021-04-22
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Publication No.: US11174378B2Publication Date: 2021-11-16
- Inventor: Chung Ching Tso , Errun Ding , Randall S. Muninger , John T. Blagg , Yongwoo Inn , Max P. McDaniel , Ashish M. Sukhadia , Sarah Eppinger
- Applicant: Chevron Phillips Chemical Company LP
- Applicant Address: US TX The Woodlands
- Assignee: Chevron Phillips Chemical Company LP
- Current Assignee: Chevron Phillips Chemical Company LP
- Current Assignee Address: US TX The Woodlands
- Agency: Merchant & Gould P.C.
- Main IPC: C08F210/16
- IPC: C08F210/16 ; C08L23/06 ; C08F4/6592 ; C08L23/16

Abstract:
Ethylene polymers having a density from 0.908 to 0.925 g/cm3, a melt index from 0.5 to 3 g/10 min, a ratio of Mw/Mn from 2 to 4, a ratio of Mz/Mw from 1.6 to 2.3, a CY-a parameter from 0.45 to 0.6, and an ATREF profile characterized by a single peak at a peak ATREF temperature from 76 to 88° C., and by less than 4.5 wt. % of the polymer eluting above a temperature of 91° C. These ethylene polymers can be used to produce various articles of manufacture, such as blown and cast films with a beneficial combination of high tear resistance and low haze.
Public/Granted literature
- US20210253835A1 Metallocene Catalyst System For Producing LLDPE Copolymers With Tear Resistance and Low Haze Public/Granted day:2021-08-19
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