Water-soluble condensation products for use in paper production

摘要

Water-soluble condensation products (I) with a viscosity of at least 100 mPa.s in 20 wt% aqueous solution at 20 deg C, obtained by reacting (a) polyalkylene-polyamines, polyamido- amines and/or ethyleneimine-grafted polyamido-amines with (b) at least bifunctional halogen-free crosslinkers selected from (b1) ethylene carbonate, propylene carbonate and/or urea, (b2) mono- unsaturated carboxylic acids and their esters, amides and anhydrides, or at least dibasic saturated mono- or poly- carboxylic acids and derivatives as above, (b3) reaction products of polyether-diamines, alkylenediamines, polyalkylene-polyamines, alkylene glycols and/or polyalkylene glycols with mono- unsaturated carboxylic acids or derivatives thereof as above, in which the product contains at least two ethylenic double bonds or carboxylic acid, amide or ester functional groups and/or (b4) reaction products of dicarboxylic acid esters with ethyleneimine containing at least two aziridino groups. Also claimed is t he above process for the production of (I).