Paper with synergistic dry strength additives and process...

Details Paper with synergistic dry strength additives and process... Paper with synergistic dry strength additives and process...

D - Textiles, Paper

21

H

9/53

D21H 17/49 (2006.01) D21H 17/37 (2006.01)

Patent

CA 1047207

PAPER WITH SYNERGISTIC DRY STRENGTH ADDITIVES AND PROCESS THEREFOR Abstract of the Disclosure Paper of high dry strength is produced by adding to a solution of fibers from 0.1 to 2% of a cationic resin and from 0.1 to 2% of an anionic resin. Proportion of cationic to anionic resin is in the range of 99:1 to 50:50. The pre- ferred cationic resin is a condensation product of acetone, formaldehyde and polyalkylene polyamine which is prepared in presence of a catalytic amount of a strong inorganic acid and has a mol ratio of 1:3:0.5, respectively. The preferred anionic resin is a copolymer of acrylamide and maleic acid or its anhydride having a mol ratio of from 90:10 to 98:2. -1-

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