发明授权
- 专利标题: Oriented films from improved propylene polymers
- 专利标题(中): 改进丙烯聚合物的取向膜
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申请号: US10930477申请日: 2004-08-31
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公开(公告)号: US07026040B2公开(公告)日: 2006-04-11
- 发明人: Aspy Keki Mehta , Michael Chia-Chao Chen , Chon-Yie Lin , James John Mcalpin , Anthony Nicholas Speca , Kelly Tormaschy
- 申请人: Aspy Keki Mehta , Michael Chia-Chao Chen , Chon-Yie Lin , James John Mcalpin , Anthony Nicholas Speca , Kelly Tormaschy
- 申请人地址: US TX Houston
- 专利权人: Exxon Mobil Chemical Patents Inc.
- 当前专利权人: Exxon Mobil Chemical Patents Inc.
- 当前专利权人地址: US TX Houston
- 代理商 William G. Muller; C. Paige Schmidt
- 主分类号: C08L23/00
- IPC分类号: C08L23/00 ; C08L23/04 ; B32B7/02
摘要:
This invention relates generally to films made from crystalline polypropylene polymers. Specifically, this invention relates to films comprising crystalline polypropylene polymer compositions containing both propylene homopolymers and propylene copolymers. The compositions are prepared using metallocene catalyst systems comprising at least two metallocenes in a polymerization process that involves the sequential or parallel polymerization of propylene homopolymers and copolymers using propylene with a small amount of comonomer, preferably ethylene. The resulting polymers are excellent for use in the production of biaxially oriented films. Films prepared with these propylene polymers have a significantly broader processability range and can be evenly stretched at lower temperature compared to films prepared from traditional polypropylene polymers.
公开/授权文献
- US20050032983A1 Oriented films from improved propylene polymers 公开/授权日:2005-02-10
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