FLUORINATED COPOLYMER AND PROCESS FOR ITS PRODUCTION, AND WATER/OIL REPELLENT COMPOSITION

摘要

To provide a fluorinated copolymer and a water/oil repellent composition, whereby adequate water/oil repellency and excellent dynamic water repellency are obtainable and environmental impact is low. A fluorinated copolymer comprising units (A1) derived from a macromonomer wherein the average polymerization degree of e.g. 2-perfluorohexylethyl acrylate is from 20 to 30, and units (B) derived from a monomer (b) which has no fluoroalkyl group and no cross-linkable functional group and of which the glass transition temperature, when formed into a homopolymer, is from 50 to 150° C., wherein the average polymerization degree of the macromonomer per one molecule of the fluorinated copolymer is at least 1, and a water/oil repellent composition containing such a fluorinated copolymer.

主权项

1. A fluorinated copolymer comprising
units (A) derived from a macromonomer which has units (Z) derived from a monomer (z) represented by the following formula (I), and units (B) derived from a monomer (b) which has no fluoroalkyl group and no cross-linkable functional group and of which the glass transition temperature, when formed into a homopolymer, is from 50 to 150° C., wherein the macromonomer is a macromonomer (a1) wherein the average polymerization degree of the monomer (z) per one molecule is from 20 to 30, and the average polymerization degree of the macromonomer (a1) per one molecule of the fluorinated copolymer is at least 1, or wherein the macromonomer is a macromonomer (a2) wherein the average polymerization degree of the monomer (z) per one molecule is at least 10 and less than 20, and the average polymerization degree of the macromonomer (a2) per one molecule of the fluorinated copolymer is at least 4,(in the formula (I), R1 is a hydrogen atom or a halogen atom, Y is a C1-4 bivalent aliphatic group, and R2 is a C1-6 linear or branched fluoroalkyl group).