Coating composition and hardened film obtained therefrom

A coating composition, comprising:

• (A) a polymer comprising units of the following:
• (a)(1) a hydrolysate of an organosilane represented by the formula:
• R1nSi(OR2)4−n,
• wherein R1 represents an organic group having 1 to 8 carbon atoms;
• wherein R2 represents an alkyl group having 1 to 5 carbon atoms or an acyl group having 1 to 6 carbon atoms;
• and
• wherein n is an integer of from 0 to 2;
• or
• (a)(2) a condensation product thereof;
• or
• (a)(3) a combination of said organosilane and said condensation product;
• and
• (b) a vinyl polymer containing a silyl group having a silicon atom bound to a hydrolytic group, a hydroxyl group or both;
• and
• (B) an oxazoline derivative as a crosslinking agent;
• and
• (C) at least one of an organic metal compound, a β-keto compound, or a multifunctional hydrazine compound;
• wherein said coating composition is in the form of an aqueous dispersion.