Additive for production of paper

Details Additive for production of paper Additive for production of paper

D - Textiles, Paper

21

H

D21H 17/45 (2006.01) D21H 17/43 (2006.01) D21H 19/20 (2006.01)

Patent

CA 2022607

An additive for paper production, comprising an amphoteric polymeric electrolyte having as an essential component thereof a structural unit represented by the following general formula I: (see fig.I) wherein n is an integer in the range of 1 to 5, R1, R2, and R3 are independently hydrogen atom or an alkyl group, R4 is hydrogen atom, an alkyl group, or a hydroxyalkyl group, and a and b are jointly relative numerals such that the a/b ratio is in the range of 0.2 to 45.0), having at least part of the amino group of said amphoteric polymeric electrolyte neutralized, and possessing a cation equivalent amount (Cv) in the range of 1.0 to 15.0 meq/g, an anion equivalent amount (Av) in the range of 0.1 to 7.0 meq/g, and a Cv/Av ratio in the range of 0.2 to 45Ø

L'invention porte sur un adjuvant entrant dans la fabrication du papier, composé d'un électrolyte polymérique amphotère ayant comme constituant essentiel une unité structurale représentée par la formule générale I ci-après: (voir fig. I), dans laquelle n est un nombre entier compris entre 1 et 5 inclusivement, R1, R2 et R3 sont indépendamment un atome d'hydrogène ou un groupe alkyle, R4 est un atome d'hydrogène, un groupe alkyle ou un groupe hydroxyalkyle, et a et b sont conjointement des chiffres relatifs de sorte que le rapport a/b se situe dans la plage 0,2 - 45,0 inclusivement, dont au moins une partie du groupe amino dudit électrolyte polymérique amphotérique est neutralisé, et possédant une quantité d'équivalent cationique (Cv) comprise entre 1,0 et 15,0 méq./g inclusivement, une quantité d'équivalent anionique (Av) comprise entre 0,1 et 7,0 méq./g inclusivement et un rapport Cv/Av compris entre 0,2 et 45,0 inclusivement.

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