Modified vinylamine-containing polymers as additives in...

C - Chemistry – Metallurgy – 08 – F

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C08F 8/00 (2006.01) C08F 26/00 (2006.01) D21H 17/33 (2006.01)

Patent

CA 2695400

Vinylamine-containing polymers are disclosed where the amine groups are substituted with (1) cationic functional groups, (2) anionic functional groups, (3) hydrophobic functional groups, (4) hydrophilic functional groups, (5) functional groups that impart amphoteric characteristics to the polymers, or (6) combinations thereof. Also disclosed are processes for preparing such polymers, as well as compositions comprising such polymers. Among other applications, these polymers can be used in papermaking applications as dry strength additives, wet strength additives, retention aids, drainage aids, and pitch and stickies control agents.

L'invention porte sur des polymères contenant de la vinylamine dans lesquels les groupes amine sont substitués par (1) des groupes fonctionnels cationiques, (2) des groupes fonctionnels anioniques, (3) des groupes fonctionnels hydrophobes, (4) des groupes fonctionnels hydrophiles, (5) des groupes fonctionnels qui confèrent des caractéristiques amphotères aux polymères ou (6) des combinaisons de ceux-ci. L'invention porte également sur des procédés de préparation de tels copolymères, ainsi que sur des compositions comprenant de tels polymères. Parmi d'autres applications, ces polymères peuvent être utilisés dans la fabrication du papier comme additifs de résistance à sec, additifs de résistance à l'état humide, auxiliaires de rétention, auxiliaires de drainage et agents de lutte contre l'empoissement et l'encrassement.

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