公开(公告)号：US3772263A

公开(公告)日：1973-11-13

申请号：US3772263D

申请日：1971-11-08

申请人： INST PETROLE CARBURANTS LUBRIF

发明人： DAWANS F ,  AMIGUES P

IPC分类号： C08F136/06 ,  C08D1/14 ,  C08D3/06 ,  C08D3/08

CPC分类号： C08F136/06 ,  Y10S526/907 ,  C08F4/69

摘要： PROCESS FOR THE SELECTIVE CONVERSION OF 1,3-BUTADIENE TO AMORPHOUS POLYBUTADIENE, HAVING 70-98% OF THE VINYL STRUCTURE, IN THE PRESENCE OF A CATALYST CONSISTING OF A MIXTURE OF A MOLYBDENUM HALIDE OR OXYHALIDE WITH A MONOALKOXYDIALKYLALUMINUM COMPOUND, COMPRISING THE IMPROVEMENT OF ADDING TO THE REACTION MEDIUM AT LEAST ONE ESTER OF A CARBOXYLIC ACID. THIS ADDITION ENHANCES THE ACTIVITY OF THE CATALYST WHICH IS SOLUBLE IN THE HYDROCARBON MEDIUM AND PROVIDES FOR A MUCH EASIER AND MORE REPRODUCIBLE. POLYMERIZATION WITH A BETTER CONTROL OF THE POLYMER MOLECULAR WEIGHT AND AN EASIER PURIFICATION OF THE POLYMER.