Invention Grant
US09574031B2 Dual catalyst systems for producing polymers with a broad molecular weight distribution and a uniform short chain branch distribution
有权
用于生产具有宽分子量分布和均匀短链分支分布的聚合物的双重催化剂体系
- Patent Title: Dual catalyst systems for producing polymers with a broad molecular weight distribution and a uniform short chain branch distribution
- Patent Title (中): 用于生产具有宽分子量分布和均匀短链分支分布的聚合物的双重催化剂体系
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Application No.: US14945540Application Date: 2015-11-19
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Publication No.: US09574031B2Publication Date: 2017-02-21
- Inventor: Qing Yang , Jeff F. Greco , Max P. McDaniel , Youlu Yu , Gary L. Glass , Tony R. Crain
- 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 ; C08F4/653 ; C08F4/6592 ; C08L23/08 ; C08F210/14 ; C08F10/02 ; C08F110/02 ; C08F210/08 ; C08F4/659
Abstract:
Disclosed herein are ethylene-based polymers having a melt index less than 50 g/10 min, a ratio of Mw/Mn from 4 to 20, a density from 0.90 to 0.945 g/cm3, and a substantially constant short chain branch distribution. These polymers can be produced using a dual catalyst system containing a boron bridged metallocene compound with a cyclopentadienyl group and an indenyl group, and a single atom bridged metallocene compound with a fluorenyl group.
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