公开(公告)号：BR9400673A

公开(公告)日：1994-11-01

申请号：BR9400673

申请日：1994-02-24

Applicant: BASF AG

Inventor： SCHERZER DIETRICH ,  HAHN KLAUS ,  RIETHUES MICHAEL ,  NAEGELE DIETER ,  WITT MICHAEL ,  HUSEMANN WOLFRAM

IPC: C08F2/20 ,  C08F2/44 ,  C08J9/00 ,  C08J9/20 ,  C08K5/00 ,  C08K5/01 ,  C08K5/03 ,  C08L23/06 ,  C08L25/04 ,  C08L25/06 ,  C08L89/00

公开(公告)号：AU4133793A

公开(公告)日：1993-12-23

申请号：AU4133793

申请日：1993-06-18

Applicant: BASF AG

Inventor： WITT MICHAEL ,  WALTER MANFRED

IPC: C08J9/16 ,  C08F2/18 ,  C08F2/44 ,  C08F12/00 ,  C08F12/08 ,  C08J9/12 ,  C08J9/20 ,  C08K13/02

Abstract: Bead-formed expandable styrene polymers are obtained by suspension polymerisation of styrene with addition of from 1 to 10% by weight of C3- to C7-hydrocarbons and/or carbon dioxide as blowing agent and optionally conventional additives, where the suspension stabiliser used is a mixture of magnesium pyrophosphate, a sulphonate group-containing extender and an alkali or alkaline-earth metal carboxylate, magnesium pyrophosphate being prepared directly before the polymerisation by combining an aqueous solution with an alkali metal pyrophosphate with at least the stoichiometrically necessary amount of a magnesium salt.