Patent ID: 7226982

Claim:
A protective coat-forming coating composition primarily comprising: 100 parts by weight of a co-hydrolyzate of a mixture of (i) a disilane compound having the formula (A): X m R 1 1−m Si—Y—SiR 1 3−m X m (A) wherein R 1 is a monovalent hydrocarbon group of 1 to 6 carbon atoms, Y is a divalent organo group containing at least one fluorine atom, X is a hydrolyzable group, and m is 1, 2 or 3, or a (partial) hydrolyzate thereof, and (ii) a fluorinated organo group-containing organosilicon compound having the formula (B): Rf—SiX 3 (B) wherein Rf is a monovalent organo group containing at least one fluorine atom and X is a hydrolyzable group or a (partial) hydrolyzate thereof, wherein the content of component (i) is 95% by weight to 99.5% by weight of the mixture; 0.1 to 30 parts by weight of fine particles of silica in the form of a colloidal silica and/or a hollow silica sol, a dispersing water of which is set within a pH range of 2 to 7, and a solvent in such an amount that the content of the solvent is 50 to 99% by weight based on the coating composition.