公开(公告)号：DE2960173D1

公开(公告)日：1981-04-02

申请号：DE2960173

申请日：1979-09-05

Applicant: BASF AG

Inventor： PERNER JOHANNES DR DIPL CHEM ,  STORK KARL DR DIPL CHEM ,  OPPENLAENDER KNUT DR DIPL CHEM

IPC: C08F22/02 ,  C08F22/06 ,  C11D3/00 ,  C11D3/37

Abstract: An improved process for the preparation of polymaleic acids having molecular weights of from 200 to 1,500, by polymerizing maleic anhydride in acetic anhydride in the presence of from 0.2 to 0.5 mole of hydrogen peroxide per mole of maleic anhydride, at from 80 DEG to 140 DEG C., and builders and encrustation inhibitors comprising the polymaleic acids prepared by the said process, for use in detergents.

公开(公告)号：DE2962232D1

公开(公告)日：1982-04-01

申请号：DE2962232

申请日：1979-08-06

Applicant: BASF AG

Inventor： STORK KARL DR DIPL CHEM ,  OPPENLAENDER KNUT DR DIPL CHEM ,  SEIB KARL DR DIPL CHEM ,  NAEGELE PAUL

IPC: A61K8/37 ,  A61Q19/00 ,  A61K7/00