Invention Grant
- Patent Title: Dual component LLDPE copolymers with improved impact and tear resistance
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Application No.: US16706949Application Date: 2019-12-09
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Publication No.: US11352471B2Publication Date: 2022-06-07
- Inventor: Jeremy M. Praetorius , Chung C. Tso , Qing Yang , Yongwoo Inn , John T. Blagg , Ashish M. Sukhadia
- 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: C08J5/18
- IPC: C08J5/18 ; C08L23/08

Abstract:
Disclosed are ethylene polymer compositions containing a homogeneously-branched first ethylene polymer component and a homogeneously-branched second ethylene polymer component of higher density than the first ethylene polymer component. The ethylene polymer composition can be characterized by a density from 0.912 to 0.925 g/cm3, a melt index less than 3.5 g/10 min, and a CY-a parameter at 190° C. from 0.25 to 0.65. These polymer compositions have the excellent dart impact strength and optical properties of a metallocene-catalyzed LLDPE, but with improved machine direction tear resistance, and can be used in blown film and other end-use applications.
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