公开(公告)号：DE19804912A1

公开(公告)日：1999-08-12

申请号：DE19804912

申请日：1998-02-07

Applicant: BASF AG

Inventor： FISCHER WOLFGANG DR ,  BUECHNER EUGEN-WALTER DR ,  DEIMLING AXEL DR ,  GAUSEPOHL HERMANN DR ,  SCHADE CHRISTIAN DR

IPC: B01J19/18 ,  C08F2/00 ,  C08F279/02 ,  C08F287/00 ,  C08F279/00

Abstract: The present invention relates to a method for producing impact-resistant modified styrene polymers, wherein said method comprises the anionic polymerisation of styrene in the presence of a rubber in one or more serially-mounted polymerisation reactors. The rubber is produced in the shape of a solution during a process carried out immediately upstream. The rubber solvent, which has a boiling point lower than that of the styrene or ethyl benzene, is removed by distillation with vaporisation cooling from at least one of said polymerisation reactors using the heat generated during the polymerisation process, and is further fed back to the rubber production step.