公开(公告)号：US20230013793A1

公开(公告)日：2023-01-19

申请号：US17785182

申请日：2020-12-16

Applicant: INEOS STYROLUTION GROUP GMBH

Inventor： Norbert NIESSNER ,  Gisbert MICHELS ,  Roman HONEKER ,  Shridhar MADHAV ,  Kirit GEVARIA ,  Pankaj BHARADWAJ ,  Prabhat SINGH

IPC: C08F2/22 ,  C08F253/00 ,  C08F4/40 ,  C08F279/04 ,  C08L25/12 ,  C08L55/02

Abstract: An emulsion polymerization process for preparation of ABS graft copolymer latex having reduced residual monomer content, wherein a grafting step c) comprises the steps: c1): feeding of 10 to 45 wt.-% of styrene and acrylonitrile in one portion to agglomerated butadiene rubber latex and addition of redox system initiator, then polymerization; c2): feeding remaining monomers in portions or continuously and further addition of redox system initiator; c3): addition of inorganic free radical initiator and continuation of polymerization, leads to ABS graft copolymers and thermoplastic molding compositions which can be used in the automotive industry.