Copolymer, treatment agent for paper, and treated paper

摘要

Disclosed is a treatment agent for paper comprising a fluorine-containing copolymer having a repeat unit (a) derived from a fluorine-containing monomer represented by general formula (I): CH2═C(—X)—C(═O)—Y—[—CH2)m—Z—]p—(CH2)n—Rf; a repeat unit (b) derived from at least one amino monomer represented by general formula (II-1):;
or a derivative thereof; and a repeat unit (c) derived from a pyrrolidone monomer represented by general formula (III):
;
The treatment agent for paper provides paper having high oil resistance and high water resistance.

主权项

1. A composition which is an aqueous dispersion, comprising a fluorine-containing copolymer and water,
wherein the fluorine-containing copolymer comprises (a) repeating units derived from a fluorine-containing monomer consisting essentially of a compound of the general formula:
CH2═C(—X)—C(═O)—Y—(CH2)n—Rf  (I) wherein X is a hydrogen atom; Y is —O— or —NH—; Rf is a fluoroalkyl group having 1 to 6 carbon atoms; n is from 0 to 10; (b) repeating units derived from at least one amino-monomer of the general formula: wherein B is a linear or branch alkylene group having 1 to 4 carbon atoms, R21 is a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, R22, R23 and R24 each is, the same or different, a hydrogen atom, a linear or branched alkyl group having 1 to 18 carbon atoms, or a hydroxyethyl group or a benzyl group, or R22 and R23 are taken together to form a divalent organic group having 2 to 30 carbon atoms, and X− is an anion group; and (c) repeating units derived from a pyrrolidone monomer of the general formula: wherein R31, R32, R33 and R34 each is, the same or different, a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, wherein the amount of the amino-monomer (b) is 10 to 25 parts by weight, and the amount of the pyrrolidone monomer (c) is 0.1 to 30 parts by weight, based on 100 parts by weight of the fluorine-containing monomer (a).