Patent ID: 9249540
Filing Date: 2016-02-02
CPC Classification: C08F,C09D,D21H,Y10T

Claim Text:
1. A water and oil resistant agent for paper comprising a fluorine-containing copolymer comprising the repeating units derived from: (a) a fluorine-containing monomer having a fluoroalkyl group represented by the general formula: wherein X represents a hydrogen atom, a linear or branched C Y is —O— or —NH—; Z is a C —CH a —CH a —(CH Rf is a C (b) a hydrophilic monomer which comprises ω-hydroxy-polyoxyethylene (meth)acrylate (b1) and 2-hydroxyethyl (meth)acrylate (b2), and (c) a monomer having an anion-donating group wherein the anion-donating group is a carboxylic acid group or a sulfonic acid group, wherein a weight average molecular weight of the fluorine-containing copolymer is 100,000 to 3,000,000, and wherein the weight ratio of (a):(b):(c) is 60-85:5-35:1-15.