AMIDGRUPPENHALTIGE POLYAMINE

Water-soluble polyamines which are obtainable by reacting (A) one or more water-soluble or water-dispersible basic polyamides which have been prepared by condensation of aliphatic polyamines containing at least two primary amino groups and at least one secondary or tertiary amino group, or of mixtures of these polyamines and of aliphatic, cycloaliphatic, araliphatic or heterocyclic polyamines containing two primary or two secondary amino groups or one primary and one secondary amino group, with saturated aliphatic dicarboxylic acids containing 4-10 carbon atoms, or with functional derivatives thereof and optionally with omega -aminocarboxylic acids containing at least 3 carbon atoms, or lactams thereof, (B) one or more polyalkylenepolyamines of the general formula in which R denotes H or CH3, y is in each case the same or different and denotes the number 0 or 1 and x denotes a number from 4 to 2,500, or mixtures of these polyalkylenepolyamines with amines of the same general formula, but in which X denotes a number from 1 to 3, and (C) compounds which are polyfunctional towards amino groups, are suitable as agents for increasing the retention of fibres, fillers and pigments, for accelerating drainage during the production of paper and for working up effluents from paper machines.