Use of copolymers of 2-acrylamido-2-methylpropane sulfonic acid for improving retention and dewatering in the manufacture of paper

摘要

A process for improving retention of fillers and pulp fines and increasing rate of dewatering of furnish in the manufacture of paper, by addition thereto of a water-soluble copolymer containing from about 2.5 to about 35 mole percent repeating units derived from 2-acrylamido-2-methylpropanesulfonic acid and a water-soluble polymer selected from the group consisting of polyacrylamide and acrylamide copolymers.