Patent ID: 6179962
Filing Date: 2001-01-30
Classification: B29K,C08B,D21H,Y10T

Abstract:
Process for making paper having improved strength characteristics comprising providing pulp and adding thereto (1) cationic polymer and (2) oxidized galactose type of alcohol configuration containing polymer wherein alcohol has been oxidized to aldehyde, and sheeting and drying paper, provided that when the oxidized galactose type of alcohol configuration containing polymer is guar it is selected from the group consisting of oxidized neutral guar, oxidized anionic guar and oxidized amphoteric guar, wherein the oxidizable galactose alcohol type of configuration is described by the following chemical structures ##STR2##where, R1 is an alkyl group of the formula C(n)H(2n+1) where n is 0 to 20; z is 0 or 1; where R2 is a linking group composed of an alkylene, or an aromatic alkylene, or an alkylene ether, or an alkylene ester, or an alkylene amide, or an alkylene urethane diradical where said linking group has a total number of carbon of from 2 to 20; where R3 is --H, --OH, --OCH.sub.3, --OC.sub.2 H.sub.5, --OC.sub.3 H.sub.7, --OC.sub.4 H.sub.9, --OOCR5 (where R5 is alkyl radical of 1 to 5 carbons), --NH.sub.2, --NH--CO--R5; and y is 0 or 1; and wherein the oxidizable galactose type of alcohol configuration containing polymer is selected from the group consisting of oxidized galactomannan gums or their ether derivatives, oxidized arabinogalactan gums or their ether derivatives, other oxidized gums or their ether derivatives, oxidized galactoglucomannan hemicelluloses or their ether derivatives and oxidized synthetically or enzymatically modified polymers.