Patent ID: 7847015

Claim:
A coating composition comprising (A) at least one fluorine-containing organosilicon compound represented by the following formula (1) or (2) Rf 2 -QZ 1 A α (1) A α Z 1 Q-Rf 2 -(Q-Z 2 -Q-Rf 2 ) x -QZ 2 A α (2) wherein Rf 1 is a perfluoroalkyl group or a perfluoroxyalkyl group, Rf 2 is a perfluoroxyalkylene group, Z 1 is a single bond or a di- to nona-valent organic group having 1 to 15 silicon atoms, Z 2 is a divalent polyorganosiloxylene group having 2 to 100 silicon atoms, Q is a di- to nona-valent group having 2 to 12 carbon atoms and may have an oxygen and/or nitrogen atom, Q in the formula (2) being the same with or different from each other, α is an integer of from 1 to 8, x is an integer of from 0 to 5, and A is a group represented by the following formula —C b H 2b SiR 3-a X a wherein R is a C 1-4 alkyl group or a phenyl group, X is a hydrolyzable group, a is 2 or 3, and b is an integer of from 0 to 6, (B) a fluorine-containing carboxylic acid having a number average molecular weight of from 100 to 10,000 and a fluorine content of at least 25 wt %, based on weight of the fluorine-containing carboxylic acid, wherein an amount of the fluorine-containing carboxylic acid ranges from 0.001 to 10 parts by weight per 100 parts by weight of the component (A), and (C) a solvent consisting of a fluorinated solvent in such an amount that total wt % of the components (A) and (B), based on total weight of the coating composition, ranges from 0.01 to 1 wt %.