发明名称 |
copolìmero em bloco estirênico radial ou um derivado hidrogenado do mesmo, método para preparar um copolìmero em bloco estirênico radial, e, betume modificado. |
摘要 |
<p>Disclosed is an improvement to a process for preparing coupled styrenic block copolymers wherein adding from about 0.01 to about 1.5 equivalents of a metal alkyl compound per equivalent of living polymer chain ends to the cement, during or after polymerization, improves coupling efficiencies. The resultant radial styrenic block copolymers have reduced amounts of 5+ arm oligomers which can be very desirable is certain applications, such as the modification of bitumen.</p> |
申请公布号 |
BR0312603(B1) |
申请公布日期 |
2012.12.11 |
申请号 |
BR20030312603 |
申请日期 |
2003.07.11 |
申请人 |
|
发明人 |
MARINUS P. VAN DJIK;ADRIANA M. P. ROS;NIKOLAAS J. VAN DIJK;HARVEY E. ATWOOD;ROBERT CHARLES BENING;CARL LESLEY WILLIS;BARRY C. MOORE |
分类号 |
C08F297/04;C08F8/04;C08L53/02;C08L95/00 |
主分类号 |
C08F297/04 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|