摘要 |
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 R<1> stands for R<2=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 strength-increasing 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. |
申请人 |
BASF AG, 67063 LUDWIGSHAFEN, DE |
发明人 |
DENZINGER, WALTER, 67346 SPEYER, DE;RUEBENACKER, MARTIN, DR., 67122 ALTRIP, DE;NILZ, CLAUDIA, DR., 67127 ROEDERSHEIM, DE;LORENCAK, PRIMOZ, DR., 67069 LUDWIGSHAFEN, DE;MOENCH, DIETMAR, DR., 69469 WEINHEIM, DE;SCHUHMACHER, RUDOLF, DR., 67459 BOEHL-IGGELHEIM, DE;STANGE, ANDREAS, DR., 68199 MANNHEIM, DE |