GRAFT POLYMERS MADE OF ALKYLENE OXIDE UNITS-CONTAINING POLYMERS AND ETHYLENICALLY UNSATURATED COMPOUNDS, PROCESS FOR PREPARING THE SAME AND THEIR USE

摘要

Graft polymers are obtainable by free radical polymerization of (A) monomers or monomer mixtures comprising (a) from 10 to 100% by weight of N-vinylcarboxamides of the formula (see formula I), where R1 and R2 are each H or C1-C6-alkyl, (b) from 0 to 90% by weight of other monoethylenically unsaturated monomers copolymerizable with the monomers (a) and (c) from 0 to 5% by weight of monomers having at least two ethylenically unsaturated, nonconjugated double bonds in the molecule in the presence of (B) polymers which contain at least 3 units of a C2-C4-alkylene oxide, and/or polytetrahydrofurans, in a weight ratio (A) : (B) of (95 to 10) : (5 to 90) , and, if required, subsequent elimination of some or all of the groups (see formula II) from the polymerized monomers (a) of the graft polymer with formation of units of the formula (see formula III) The graft polymers can be used as dry and wet strength agents, as fixing agents fear interfering substances and fillers, as retention aids and drainage aids in the production of paper and as promoters in the diketene sizing of paper, board and cardboard, as dispersants for pigments, as starch cationizing agents and as assistants in the production of tissue papers.