Features of the coagulating and peptizing action of weakly basic and strongly basic cationic polyelectrolytes on rosin emulsions

It has been shown for the first time that cationic polyelectrolytes (weakly basic (polyamide-polyamine-epichlorohydrin resin (PPER)) and strongly (polydimethyldiallylammonium chloride (PDMDAAC) copolymer of acrylamide with methylene dimethylamminopropylacrylamide (CA MC DMAPA)), widely used in paper cardboard technology as flocculants (existing technology), additionally participate processes coagulation peptization (proposed technology). established coagulating ability decreases series CA DMAPA > PDMDAAC PPER, while peptizing ability, on contrary, increases. Peptizable coagulants size ξ-potential do not exceed 5200 nm +15 mV, respectively, are formed presence when its content dispersed system does 0.15 parts by weight / phase rosin emulsion (RE). The region electrolytic RE technology) corresponds to ratio : electrolyte range from 1: 0.3 0.6, an increased which is 2.4 3.0 , process proceeds second (the resulting coagulates electrically neutral coarse (size exceeds nm) able peptize). “RE (1.0 wt. parts) – PPER (0.04 (0.6 parts)”. promotes increase peptized particles +35 +50 mV. Unlike coagulates, such provide a shift sizing traditional mode homocoagulation more efficient heteroadagulation. This results hydrophobicity strength (cardboard) 29–36 28–38 %, well improvement printing properties coated products 12–15 %.