Manufacture and use of water-soluble auxiliary agents based on polyaminoamides for the production of paper

In a paper making process wherein a suspension of paper pulp fibers, pigment, and filler is formed into a web on a travelling screen, the improvement which comprises incorporating into the suspension, in an amount sufficient to produce an improved drainage, sedimentation, and floatation of paper pulp fibers, modified basic polyaminoamide results from:

• a. reacting substantially equimolar portions of a polyfunctional compound selected from the group consisting of epichlorohydrin, dichlorohydrin, or mixtures thereof with a tertiary amine selected from the group consisting of trimethylamine, triethylamine, tripropylamine, tributylamine, dimethylaniline, dimethylcyclohexylamine or mixtures of any of said amines to form an ammonium compound;
• b. reacting 0.2-1.8 mols of said ammonium compound with each mol of secondary amine group in a water soluble basic polyaminoamide which is a condensation product of
• 1. a dicarboxylic acid,
• 2. a polyalkylenepolyamine, and
• 3. an aminocarboxylic acid or a lactam;
• and
• c. said basic polyaminoamide being reacted with 0.15-0.19 mol of said polyfunctional compound per mol equivalent of secondary amino group in said polyaminoamide, before or after the reaction of step (b) has taken place.