公开(公告)号：AU2007296308A1

公开(公告)日：2008-03-20

申请号：AU2007296308

申请日：2007-09-10

Applicant: BASF SE

Inventor： BAYER ROBERT ,  PIEROBON MARIANNA ,  ERK ATES ,  FEISE HERMANN JOSEF ,  MEFFERT HELMUT

IPC: C08F6/00

Abstract: A method for removing residual styrene monomers from co-extrudates comprising polystyrene and water-insoluble, crosslinked polyvinylpyrrolidone, which comprises subjecting an aqueous suspension of the particulate solid co-extrudate to a heat treatment at temperatures of 60 to 99° C., the weight ratio of solid co-extrudate to water in the suspension being 1:1.5 to 1:20, and the concentration of the suspension being kept constant during the treatment.