Cationic or amphoteric copolymers prepared in an inverse...

Details Cationic or amphoteric copolymers prepared in an inverse... Cationic or amphoteric copolymers prepared in an inverse...

C - Chemistry, Metallurgy

08

L

C08L 53/00 (2006.01) C08F 2/32 (2006.01) C08F 220/06 (2006.01) C08F 220/56 (2006.01) C08F 222/00 (2006.01) C08F 293/00 (2006.01) D21H 17/41 (2006.01) D21H 17/44 (2006.01) D21H 17/45 (2006.01) D21H 21/10 (2006.01)

Patent

CA 2507575

A papermaking method and a composition which utilize, as a drainage aid, a water-soluble cationic or amphoteric copolymer prepared via a water-in-oil polymerization technique that, absent a cross-linking agent, is characterized by a Huggins' constant (k') determined in 0.01 M NaCl greater than 0.3 and a storage modulus (G') at 6.3 Hz greater than 50 Pa.

La présente invention concerne un procédé de fabrication de papier et une composition dans lesquels on utilise, en tant que séquestrant, un copolymère soluble cationique ou amphotère préparé au moyen d'une technique de polymérisation eau-dans-huile qui, en l'absence d'agent de réticulation, se caractérise par une constante de Huggins (k') déterminée dans 0,01 M de NaCl qui est supérieure à 0,3 et un module de conservation (G') à 6,3 Hz qui est supérieur à 50 Pa.

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