公开(公告)号：SE7707256L

公开(公告)日：1977-12-27

申请号：SE7707256

申请日：1977-06-22

Applicant: HOECHST AG

Inventor： LEDERER M ,  BOUMAN A J M

IPC: C08F2/00 ,  C08F2/18 ,  C08F2/20 ,  C08F2/44 ,  C08F12/00 ,  C08F285/00 ,  C08F291/02 ,  C08F12/02

Abstract: There is described an improved process for the discontinuous suspension polymerization of alkenyl-aromatic compounds, which comprises re-using the aqueous polymerization medium, after separation of the polymer beads, as the polymerization medium of a subsequent polymerization. Monomer-soluble and water-soluble initiators and, optionally fresh water and dispersing agent, are added. Re-using the aqueous polymerization medium does not negatively affect the color and mechanical properties of the polymer obtained. The process of the invention results in considerable saving of energy.