公开(公告)号：EP4435024A1

公开(公告)日：2024-09-25

申请号：EP23901748.6

申请日：2023-12-25

申请人： Changzhou Ruihua Chemical Engineering Technology Co., Ltd

发明人： JIANG, Dongxu ,  LIU, Hui ,  ZHANG, Jun ,  ZHANG, Wenming ,  ZHOU, Haiyan ,  XU, Zhigang

IPC分类号： C08F279/02 ,  C08F212/08 ,  C08F257/02 ,  C08F2/38

摘要： The present invention provides a preparation method for high impact polystyrene (HIPS) and a HIPS prepared thereby. In the present invention, a chain transfer agent and/or a low-molecular-weight vinyl aromatic polymer is added to a mixture solution of a vinyl aromatic monomer, a solvent, a rubber and an adjuvant, and prepolymerization is performed under stirring, followed by final polymerization and devolatilization to form HIPS. In the present invention, the morphological structure of a rubber phase can be maintained by appropriately reducing a viscosity of a prepolymerized continuous phase. Within a certain range of shearing rate, the morphological structure of the prepared HIPS can be maintained to improve the impact strength.