公开(公告)号：DE19806774A1

公开(公告)日：1999-08-19

申请号：DE19806774

申请日：1998-02-18

Applicant: BASF AG

Inventor： SCHADE CHRISTIAN ,  FISCHER WOLFGANG ,  GAUSEPOHL HERMANN ,  KLOSTERMANM RAINER ,  WARZELHAN VOLKER ,  FONTANILLE MICHEL ,  DEFFIEUX ALAIN ,  DESBOIS PHILIPPE

IPC: C08F4/52 ,  C08F4/46 ,  C08F4/50 ,  C08F12/04 ,  C08F236/10 ,  C08F279/02 ,  C08F297/06 ,  C08F12/00 ,  C08F236/00

Abstract: A process for the homopolymerization of vinyl aromatic monomers or copolymerization of vinyl aromatic monomers and dienes comprises polymerization of the monomers in the presence of at least an organoalkali metal, an organomagnesium compound and an organoaluminum compound. Independent claims are included for: (i) an initiator composition comprising an organoalkali metal, an organomagnesium compound and an organoaluminum compound, whereby the molar ratio of magnesium to the alkali metal is 0.2-3.8 and the molar ratio of aluminum to the alkali metal is 0.2-4; (ii) a process for the preparation of an initiator composition by dissolving the organometallic compounds in inert hydrocarbons and allowing the mixture to mature at 0-120 deg C for at least 5 minutes.