发明名称 |
High temperature process for the production of atactic, amorphous, tacky propylene polymers |
摘要 |
Atactic or amorphous poly-alpha-olefins containing 100%-65% propylene and optionally up to about 35% ethylene and/or up to about 15% of a C<SUB>4</SUB>-C<SUB>8 </SUB>alpha-olefin are prepared by polymerizing the monomer(s) at 180-450° F. and at a pressure sufficient to substantially maintain the monomer(s) in the liquid phase. The polymerization is carried out in the presence of catalyst system consisting of (a) a transition metal halide selected from the group consisting of (i) a titanium trihalide and an aluminum alkyl, (ii) a titanium halide on a comminuted magnesium halide support, and (iii) a titanium halide sandwich compound and (b) aluminum alkyl as a co-catalyst. No stereoregulator or only minor amounts of a stereoregulator are used.
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申请公布号 |
US6998457(B2) |
申请公布日期 |
2006.02.14 |
申请号 |
US20030430082 |
申请日期 |
2003.05.06 |
申请人 |
KELLEY JOSEPH M |
发明人 |
KELLEY JOSEPH M. |
分类号 |
C08F210/00;C08F2/00;C08F210/06 |
主分类号 |
C08F210/00 |
代理机构 |
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