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Abstract

Disclosed is a fluorine-containing oligomer comprising a copolymer of a fluoroalkyl alcohol (meth)acrylic acid derivative represented by the general formula:

description='In-line Formulae' end='lead'C_nF_2n+1(CH₂CF₂)_a(CF₂CF₂)_b(CH₂CH₂)_cOCOCR═CH₂  [I]description='In-line Formulae' end='tail'

wherein R is a hydrogen atom or a methyl group, n is an integer of 1 to 6, a is an integer of 1 to 4; b is an integer of 0 to 3; and c is an integer of 1 to 3; and a (meth)acrylic acid derivative represented by the general formula:

description='In-line Formulae' end='lead'(CH₂═CRCO)_mR′  [II]description='In-line Formulae' end='tail'

wherein R is a hydrogen atom or a methyl group, m is 1, 2, or 3; and when m is 1, R′ is OH group, NH₂ group that is unsubstituted or mono- or di-substituted with an alkyl group having 1 to 6 carbon atoms, or a monovalent group derived from an alkylene glycol or polyalkylene glycol group containing an alkylene group having 2 or 3 carbon atoms; when m is 2 or 3, R′ is a divalent or trivalent organic group derived from a diol or triol. The copolymerization reaction is performed using a hydrocarbon-based peroxide or azo compound polymerization initiator. Also disclosed are nano-silica composite particles formed as a condensate of the fluorine-containing oligomer and an alkoxysilane with nano-silica particles.

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First Claim