公开(公告)号：DE3263839D1

公开(公告)日：1985-07-04

申请号：DE3263839

申请日：1982-02-26

Applicant: BASF AG

Inventor： MESSMER KARLHEINZ DR ,  FISCHER HERMANN DR ,  HARTMANN HEINRICH DR ,  DENZIGER WALTER ,  SCHNEIDER ROLF DR ,  WULZ KLAUS DR ,  RAUBENHEIMER HANS-JUERGEN

IPC: C08F20/00 ,  C08F20/02 ,  C08F210/00 ,  C08F222/06 ,  C09K23/52 ,  C11D3/37 ,  D21H17/43 ,  D21H19/58 ,  D21H3/38

Abstract: Maleic anhydride copolymer powders are prepared by a process wherein a solution or dispersion of maleic anhydride in an alkyl vinyl ether and/or an alkene, containing from 3 to 25 moles of the alkyl vinyl ether and/or alkene per mole of maleic anhydride, is brought into contact with a powder bed under polymerization conditions, and is polymerized in the bed while the reaction mass is circulated and the powder state is maintained, and the heat generated during polymerization is removed by evaporating excess monomer which boils lower than maleic anhydride.