Patent ID: 8541533

Claim:
A fluorine-containing polyfunctional silicon compound represented by the following general formula (I): wherein in formula (I), Q represents an (n+m)-valent perfluoroalkyl group, which may have an ethereal oxygen atom; each of Rf 1 and Rf 2 independently represents a fluorine atom, a hydrogen atom or an alkyl group having at least one fluorine atom; R 1 represents a hydroxyl group, an isocyanate group or a hydrolyzable group; R 2 represents a hydrogen atom or a hydrocarbon group; k represents 0 or 1; n represents an integer of 2 or more; m represents an integer of 0 or more; a represents an integer of from 1 to 6; and b represents an integer of from 1 to 3, said compound being produced by reacting an (n+m)-valent fluorine-containing alcohol represented by the following general formula (I) and an isocyanate represented by the following general formula (VII) under a basic condition: wherein in formulas (I) and (VII), Q represents an (n+m)-valent perfluoroalkyl group, which may have an ethereal oxygen atom; k represents 0 or 1; each of Rf 1 and Rf 2 independently represents a fluorine atom, a hydrogen atom or an alkyl group having at least one fluorine atom; R 1 represents a hydroxyl group, an isocyanate group or a hydrolyzable group; R 2 represents a hydrogen atom or a hydrocarbon group; n represents an integer of 2 or more; m represents an integer of 0 or more; a represents an integer of from 1 to 6; and b represents an integer of from 1 to 3, and wherein the (n+m)-valent fluorine-containing alcohol represented by the formula (i) is selected from the group consisting of the compounds (i-1) to (i-21) as follows: