公开(公告)号：US20230416436A1

公开(公告)日：2023-12-28

申请号：US18039172

申请日：2021-11-25

申请人： KM Technologies GmbH

发明人： Adriano Malacchini ,  Giovanni Ricci ,  Giuseppe Leone

IPC分类号： C08F236/08 ,  C08F236/06 ,  C08F297/08 ,  C08F4/12 ,  C08F236/04

CPC分类号： C08F236/08 ,  C08F236/06 ,  C08F236/045 ,  C08F4/12 ,  C08F297/086

摘要： The invention relates to isoprene and butadiene and/or pentadiene stereoblock copolymers in which the different stereoregular blocks, joined to each other by means of a single junction point, have different structures and thermal properties. The invention also relates to a process for the preparation of the aforesaid copolymers which comprises the formation of stereoblocks in successive steps but in the presence of a single catalytic system obtained from cobalt dichloride, a phosphine and an organic compound of aluminum.