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1. 发明授权

US06271313B1 Styrene-butadiene block copolymer 失效
标题翻译：苯乙烯 - 丁二烯嵌段共聚物
公开(公告)号：US06271313B1
公开(公告)日：2001-08-07
申请号：US09366864
申请日：1999-08-04
申请人： Adolfo Zambelli , Alfonso Grassi , Michela Caprio , Daniel Edward Bowen, III
发明人： Adolfo Zambelli , Alfonso Grassi , Michela Caprio , Daniel Edward Bowen, III
IPC分类号： C08F2502
CPC分类号： C08F297/06 , C08F8/04 , C08F297/04 , C08F297/044
摘要： This invention is based upon the unexpected discovery that styrene-butadiene block copolymers having syndiotactic polystyrene (sPS) blocks and cis-1,4-polybutadiene (PBd) blocks can be synthesized by polymerizing styrene and 1,3-butadiene utilizing certain catalyst systems when the polymerization is conducted at a pressure which is within the range of about 10 mm of mercury to about 50 mm of mercury at a temperature which is within the range of about 0° C. to about 100° C. This invention more specifically discloses a styrene-butadiene block copolymer which is comprised of (a) syndiotactic polystyrene blocks and (b) cis-1,4-polybutadiene blocks, wherein said cis-1,4-polybutadiene blocks have a vinyl content of up to about 20 percent, wherein the syndiotactic polystyrene blocks have a syndiotactic microstructure content of at least 50 percent, wherein the block copolymer contains at least five syndiotactic polystyrene blocks and wherein said block copolymer has a number average molecular weight which is within the range of about 10,000 to about 700,000.
摘要翻译：本发明基于意想不到的发现，即具有间同立构聚苯乙烯（sPS）嵌段和顺式-1,4-聚丁二烯（PBd）嵌段的苯乙烯 - 丁二烯嵌段共聚物可以通过使用某些催化剂体系聚合苯乙烯和1,3-丁二烯来合成，在约0℃至约100℃的温度范围内，在约10mm汞柱至约50mm汞柱的压力下进行聚合。本发明更具体地公开了一种苯乙烯 - 丁二烯嵌段共聚物，其由（a）间同立构聚苯乙烯嵌段和（b）顺式-1,4-聚丁二烯嵌段组成，其中所述顺式-1,4-聚丁二烯嵌段具有高达约20％的乙烯基含量，其中间规聚苯乙烯嵌段具有至少50％的间规微结构含量，其中嵌段共聚物包含至少五个间同立构聚苯乙烯嵌段，并且其中所述嵌段共聚物具有数均分子量重量在约10,000至约700,000的范围内。

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