Copolymer, paper-treating agent, and processed paper

Details Copolymer, paper-treating agent, and processed paper Copolymer, paper-treating agent, and processed paper

C - Chemistry, Metallurgy

08

F

C08F 220/22 (2006.01) D21H 17/37 (2006.01) D21H 19/20 (2006.01) D21H 21/16 (2006.01)

Patent

CA 2488804

A paper-treating agent which comprises a copolymer comprising, as essential components, units derived from a (meth)acrylate having a polyfluoroalkyl group, units derived from a pyrrolidone monomer, nitrogen-containing units, e.g., -[CH2C(CH3)[COOCH2CH2CH2N+(CH3)3.cndot.Cl-]]-, and units containing an anionic functional group, e.g., -[CH2C(CH3)COOH]-. The paper-treating agent has a low viscosity and is less apt to suffer a decrease in performance even when used in combination with a cationic paper-strengthening agent.

L'invention porte sur un agent de traitement du papier, copolymère dont les constituants essentiels sont: des unités dérivés de (méth)acrylate comportant un groupe polyfluoroalkyle, des unités dérivés d'un monomère de pyrrolidone, des unités azotées telles que -[CH¿2?C(CH¿3?)[COOCH¿2?CH¿2?CH¿2?N?+¿(CH¿3?)¿3? Cl?-¿]]-, et des unités contenant un groupe fonctionnel anionique tel que -[CH¿2?C(CH¿3?)COOH]-. L'agent de traitement du papier, de faible viscosité, est moins susceptible de connaître une baisse de performances même lorsqu'on l'utilise en combinaison avec un agent cationique de renfort du papier.

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