公开(公告)号：CA2217295A1

公开(公告)日：1996-11-07

申请号：CA2217295

申请日：1996-04-20

Applicant: BASF AG

Inventor： STANGE ANDREAS ,  RUEBENACKER MARTIN ,  DENZINGER WALTER ,  MOENCH DIETMAR ,  SCHUHMACHER RUDOLF ,  LORENCAK PRIMOZ ,  NILZ CLAUDIA

IPC: C08B31/12 ,  C08F8/12 ,  C08F283/00 ,  C08F283/06 ,  C09B67/46 ,  C09D17/00 ,  D21H17/53 ,  D21H19/20 ,  D21H21/10 ,  D21H21/16 ,  D21H21/18

Abstract: Graft polymers are obtained by radically initiated polymerisation of (A) monomers or monomer mixtures of (a) 10 to 100 % by weight N-vinyl carboxylic acid amides having the formula (I), in which R1 stands for R2=H and C1-C6 alkyl, (b) 0 to 90 % by weight other monoethylenically unsaturated monomers that may be copolymerised with monomers (a), and (c) 0 to 5 % by weight of at least two ethylenically unsaturated monomers that contain non-conjugated double bonds in their molecule, in the presence of (B) polymers that contain at least 3 units of a C2-C4 alkylene oxide and/or polytetrahydrofuranes, in a weight ratio (A):(B) equal to (95 to 10):(5 to 80). The group (IV) is then optionally separated from the polymerised monomer (a) of the graft polymer, forming at least units having the formula (1). Also disclosed are a process for preparing said graft polymers and their use as dry and wet strengthincreasing agents, as fixatives for impurities and fillers, as retention and dewatering agents for paper-making, as promoters during paper, cardboard and paperboard diketen gluing, as pigment dispersants, as starch cationising agents and as auxiliary substances for producing paper tissues.