Patent ID: 8771469
Filing Date: 2014-07-08
Classification: C08F,D21H

Abstract:
1. A process for improving drainage in paper making comprising the steps of: a. forming an aqueous suspension of cellulosic fibers, b. adding an effective amount of a cationic resin to the aqueous suspension of cellulosic fibers, c. forming the cellulosic fibers into a sheet, and d. drying the sheet to produce a paper, wherein the improvement to drainage is provided by the cationic resin of step b); wherein the cationic resin of step b) comprises the reaction product of a dialdehyde with a copolymer produced from acrylamide, and diallyldimethylammonium chloride, and wherein the diallyldimethylammonium chloride comprises greater than or equal to about 30 mole % of the copolymer before reaction with the dialdehyde.