公开(公告)号：US20030045657A1

公开(公告)日：2003-03-06

申请号：US10234391

申请日：2002-09-05

申请人： UBE INDUSTRIES, LTD.

发明人： Michinori Suzuki ,  Masato Murakami

IPC分类号： C08F136/00 ,  C08F004/08

CPC分类号： C08C19/26

摘要： Modified polybutadiene having a high-cis and low-trans structure with a moderate 1,2-structure content and exhibiting improved characteristics such as cold flow properties, which is obtained by modifying starting polybutadiene having a Tcp/ML1null4 ratio (Tcp: 5% toluene solution viscosity at 25null C.ML1null4: Mooney viscosity at 100null C.) of 2.5 or more in the presence of a transition metal catalyst.