| 摘要 |
A copolymer comprises repeating units derived from at least one co-reactant comprising two or more mercapto functional groups, and repeating units derived from a fluoroacrylate comprising the reaction product of: (a) at least one fluorochemical alcohol represented by the formula: <?in-line-formulae description="In-line Formulae" end="lead"?>C<SUB>4</SUB>F<SUB>9</SUB>-X-OH<?in-line-formulae description="In-line Formulae" end="tail"?> wherein: R=hydrogen or an alkyl group of 1 to 4 carbon atoms, m=2 to 8, R<SUB>f</SUB>=C<SUB>n</SUB>F<SUB>2n+1</SUB>, n=1 to 5, y=0 to 6, and q=1 to 8; (b) at least one unbranched symmetric diisocyanate; and (c) at least one hydroxy-terminated alkyl (meth)acrylate or 2-fluoroacrylate monomer having 2 to about 30 carbon atoms in its alkylene portion.
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