Cationic copolymers derived from acrylamides and use thereof

Details Cationic copolymers derived from acrylamides and use thereof Cationic copolymers derived from acrylamides and use thereof

C - Chemistry, Metallurgy

08

F

C08F 220/60 (2006.01) D21H 17/45 (2006.01)

Patent

CA 2677846

The invention relates to acrylamide cationic copolymers obtained by a so-called Hofman degradation reaction using an alkaline and/or alkaline-earth hydroxide and an alkaline and/or alkaline-earth hypohalide. The invention also relates to the use of these copolymers essentially as resistance agents for paper and/or coagulation agents. The copolymers are characterised in that they have a desalination coefficient (Cd) higher than 0.6, preferably higher than 0.65, and advantageously higher than 0.7.

L'invention concerne des copolymères cationiques d'acrylamide obtenus par réaction de dégradation dite d'Hofmann, à l'aide d'un hydroxyde d'alcalin et/ou alcalino-terreux et d'un hypohalogénure d'alcalin et/ou alcalino-terreux, et l'utilisation de ces copolymères principalement comme agents de résistance pour le papier et/ou agents de coagulation Les copolymères sont caractérisés par un coefficient de désalination (Cd) supérieur à 0,6, de préférence supérieur à 0,65, avantageusement supérieur à 0,7.

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