公开(公告)号：US5385994A

公开(公告)日：1995-01-31

申请号：US139667

申请日：1993-10-22

申请人： Daniel F. Graves ,  James E. Hall ,  William J. Shuttleworth

发明人： Daniel F. Graves ,  James E. Hall ,  William J. Shuttleworth

IPC分类号： C07D307/06 ,  C08F4/42 ,  C08F4/48 ,  C08F12/04 ,  C08F297/04

CPC分类号： C08F297/04 ,  C08F12/04

摘要： A method for improving the initiation efficiency during the anionic polymerization of 15 to 100 percent weight of a vinyl aromatic hydrocarbon monomers and 0 to 85 percent by weight of a conjugated diene monomer by conducting the polymerization in the presence of a catalytically effective amount of: (a) an organolithium initiator and (b) a 2,5-substituted tetrahydrofuran modifier having the structural formula: ##STR1## wherein R.sub.1 and R.sub.1 ' are independently H or an alkyl group containing 1 to 4 carbon atoms and R.sub.2 and R.sub.2 ' are alkyl group containing 1 to 4 carbon atoms.

摘要翻译： 通过在催化有效量的存在下进行聚合，提高阴离子聚合中的引发效率的方法：15-100重量％的乙烯基芳族烃单体和0至85重量％的共轭二烯单体， a）有机锂引发剂和（b）具有以下结构式的2,5-取代的四氢呋喃改性剂：其中R1和R1'独立地是H或含有1至4个碳原子的烷基，R2和R2'是烷基 含有1至4个碳原子的基团。