Patent ID: 7081272

Claim:
A coating composition comprising: a fluid, silica precursor (A) obtained by subjecting at least one alkoxysilane to hydrolysis and polycondensation in the presence of an acid catalyst, said alkoxysilane being selected from the group consisting of first alkoxysilanes, each independently represented by the following formula (1): R 1 n Si(OR 2 ) 4-n (1) wherein each R 1 independently represents a hydrogen atom, a C 1 –C 10 alkyl group, a C 6 –C 10 aryl group, a vinyl group, a C 3 –C 10 organic group having a vinyl group, a C 4 –C 10 organic group having a (meth)acryloyl group or a C 3 –C 10 organic group having an epoxy group, each R 2 independently represents a C 1 –C 6 alkyl group, and n represents an integer of from 0 to 2, and second alkoxysilanes, each independently represented by the following formula (2): (R 3 O) 3 Si—(R 4 ) m —Si(OR 3 ) 3 (2) wherein each R 3 independently represents a C 1 –C 6 alkyl group, R 4 represents a C 1 –C 6 alkylene group or a C 6 –C 10 arylene group, and m represents 0 or 1, a basic compound (B) having at least one member selected from the group consisting of a basic hydroxyl group and a basic nitrogen atom, wherein the pH of a 0.1 N aqueous solution of said basic compound (B) is 11 or more, and the vapor pressure of said basic compound (B) is 1.3 kPa or lower as measured at 100° C., and an organic compound (C) having a boiling point of 100° C. or higher, said organic compound (C) being compatible with said fluid, silica precursor (A), wherein the amount of said basic compound (B) is from 0.0015 to 0.5 mol, in terms of the total molar amount of said basic hydroxyl groups and said basic nitrogen atoms in said basic compound (B), per mole of Si atoms contained in said fluid, silica precursor (A).