发明名称 |
Polypropylene ethylene-propylene copolymer blends and in-line process to produce them |
摘要 |
Isotactic polypropylene ethylene-propylene copolymer blends and in-line processes for producing them. The blend of polypropylene and ethylene-propylene copolymer may have between 1 and 50 wt% of isotactic polypropylene with a melt flow rate of between 0.5 and 20,000 g/10 min and a melting peak temperature of 145°C or higher, and wherein the difference between the DSC peak melting and the peak crystallization temperatures is less than or equal to 0.5333 times the melting peak temperature minus 41.333°C, and between 50 and 99 wt% of ethylene-propylene copolymer including between 10 wt% and 20 wt% randomly distributed ethylene with a melt flow rate of between 0.5 and 20,000 g/10 min, wherein the copolymer is polymerized by a bulk homogeneous polymerization process, and wherein the total regio defects in the continuous propylene segments of the copolymer is between 40 and 150% greater than a copolymer of equivalent melt flow rate and wt% ethylene polymerized by a solution polymerization process. The in-line process for producing the blend includes providing two or more parallel reactor trains and a separator for product blending and product-feed separation; wherein the two or more reactor trains operate under fluid phase bulk homogeneous conditions and at least one of the trains operates under supercritical conditions. |
申请公布号 |
EP2450403(A1) |
申请公布日期 |
2012.05.09 |
申请号 |
EP20120153456 |
申请日期 |
2008.12.18 |
申请人 |
EXXONMOBIL RESEARCH AND ENGINEERING COMPANY |
发明人 |
KISS, GABOR;BRANT, PATRICK;REYNOLDS, ROBERT P.;MEHTA, ASPY K.;VARMA-NAIR, MANIKA;CHU, JOHN W.;RUCKER, STEVEN P. |
分类号 |
C08L23/00;C08L23/04;C08L23/08;C08L23/10 |
主分类号 |
C08L23/00 |
代理机构 |
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代理人 |
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地址 |
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