| 摘要 |
The present invention provides a method for treatment of a substrate comprising applying to said substrate a fluorochemical composition comprising a fluorochemical copolymer derived from at least one fluorochemical monomer A, at least one monomer B, at least one monomer C and at least one monomer D, said fluorochemical monomer A having a fluoroaliphatic group and being an ester of an alpha , beta -ethylenically unsaturated carboxylic acid, said monomer B being an ester of an alpha , beta -ethylenically unsaturated carboxylic acid, said monomer C being an ethylenically unsaturated dicarboxylic acid anhydride and said monomer D being an ester of an alpha , beta -ethylenically unsaturated carboxylic acid, said fluorochemical monomer A and said monomers B and C containing only one polymerizable group and said monomer D containing as a further polymerizable group an ethylenically unsaturated group that has a higher affinity to copolymerize with said monomer C than with any of said monomers A, B or D. Further provided are the fluorochemical copolymer, a method of preparing the fluorochemical copolymer, fluorochemical compositions based thereon and the use of the fluorochemical copolymer to provide oil and/or water repellency to a substrate.
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