Additive for papermaking and process for papermaking

Details Additive for papermaking and process for papermaking Additive for papermaking and process for papermaking

D - Textiles, Paper

21

H

D21H 17/34 (2006.01) D21H 17/37 (2006.01) D21H 17/45 (2006.01) D21H 21/10 (2006.01)

Patent

CA 2172756

A novel additive for papermaking is disclosed. The additive comprises an aqueous solution of a copolymer obtained by reacting (a) an acrylamide, (b) a.vinyl monomer which is copolymerizable with component (a) and has a cationic group, (c) at least one of vinyl monomers which are copolymerizable with component (a) and (b) and have 2, 3 or 4 carboxyl groups in a molecule thereof and/or a salt thereof, optionally (e) a nonionic monomer which is copolymerizable with components (a), (b) and (c) if desired, and (d) a cross-linking compound, in the presence of (f) at least one of ethylene glycol, diethyl- ene glycol, diethanolamine and glycerin. This novel additive for papermaking is able to achieve excellent freeness and yield in the process of papermaking and provides paper with increased strength.

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