- 专利标题: Dual component LLDPE copolymers with improved impact and tear resistance
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申请号: US16459656申请日: 2019-07-02
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公开(公告)号: US10544273B2公开(公告)日: 2020-01-28
- 发明人: Jeremy M. Praetorius , Chung C. Tso , Qing Yang , Yongwoo Inn , John T. Blagg , Ashish M. Sukhadia
- 申请人: Chevron Phillips Chemical Company LP
- 申请人地址: US TX The Woodlands
- 专利权人: Chevron Phillips Chemical Company LP
- 当前专利权人: Chevron Phillips Chemical Company LP
- 当前专利权人地址: US TX The Woodlands
- 代理机构: Merchant & Gould P.C.
- 主分类号: B32B7/02
- IPC分类号: B32B7/02 ; C08J5/18 ; C08L23/08
摘要:
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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