发明名称 |
VERBESSERTE PROPYLENPOLYMERE FÜR ORIENTIERTE FILME |
摘要 |
This invention relates generally to crystalline polypropylene polymers and methods for their production. Specifically, this invention relates to crystalline polypropylene polymer compositions comprising 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. |
申请公布号 |
DE69713343(T2) |
申请公布日期 |
2002.10.10 |
申请号 |
DE1997613343T |
申请日期 |
1997.08.25 |
申请人 |
EXXONMOBIL CHEMICAL PATENTS INC., BAYTOWN |
发明人 |
MEHTA, K.;CHEN, CHIA-CHAO;LIN, CHON-YIE;MCALPIN, J.;SPECA, N.;TORMASCHY, KELLY |
分类号 |
C08F4/642;C08F10/00;C08F10/06;C08F210/06;C08F210/16;C08F297/08;C08J5/18;C08L23/12;C08L23/14;(IPC1-7):C08L23/10 |
主分类号 |
C08F4/642 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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