公开(公告)号：EP4441111A1

公开(公告)日：2024-10-09

申请号：EP22829737.0

申请日：2022-12-01

申请人： CLARIANT INTERNATIONAL LTD

发明人： PETROZZIELLO, Lena ,  KAYSER, Christoph ,  PFAHLS, Margarethe ,  LUKOWICZ, Thomas ,  FISCHER, Dirk

IPC分类号： C08F251/00 ,  A61K8/81 ,  C08L51/02

CPC分类号： C08F251/00 ,  A61K8/8158 ,  C08L51/02 ,  A61Q19/00 ,  A61K2800/1020130101 ,  A61K8/91 ,  A61K2800/4820130101

公开(公告)号：EP4110882A1

公开(公告)日：2023-01-04

申请号：EP21713812.2

申请日：2021-02-26

申请人： Clariant International Ltd

发明人： PETROZZIELLO, Lena ,  KAYSER, Christoph Wolfgang ,  OKOCHA, Cyril ,  CHEN, Tao ,  WANG, Qiwei ,  ALJEABAN, Norah

IPC分类号： C09K8/035 ,  C09K8/528

公开(公告)号：EP4130077A1

公开(公告)日：2023-02-08

申请号：EP21190165.7

申请日：2021-08-06

申请人： Clariant International Ltd ,  Max-Planck-Gesellschaft zur Förderung der Wissenschaften e.V.

发明人： PETROZZIELLO, Lena ,  KAYSER, Christoph ,  HÄUßLER, Matthias ,  KLAPPER, Markus

IPC分类号： C08F293/00 ,  C08F220/06 ,  C08F220/70

摘要： Symmetric RAFT agent for controlled radical polymerization of multi-block co-polymers for monomers with different activities
The present invention is directed at a method for the preparation of a multi-block co-polymer by reversible addition-fragmentation chain transfer (RAFT) polymerization of ethylenically unsaturated monomers with different activities in the presence of a chain transfer agent (CTA), wherein the innermost block of the multi-block copolymer is obtained from ethylenically unsaturated monomers having the highest reactivity toward radical addition within the multi-block copolymer. The invention is also directed at said chain transfer agent, the use thereof for preparing said multi-block copolymer, said multiblock copolymer, a process for the preparation of the chain transfer agent, and the use of said multiblock copolymer as an emulsifying or dispersing agent.