Patent ID: 8258202

Claim:
A coating composition comprising: (a) a film-forming resin; (b) a porous solid comprising an ion-exchange ceramic comprising pores having anti-microbial metal ions disposed therein; and (c) a halogen ion-containing onium compound having a minimum molecular diameter according to the equation: D= 2*((0.75 *V )π) 1/3 where D is the minimum molecular diameter and V is the van der Waals volume of the molecule, and the minimum molecular diameter is greater than the size of the pores having anti-microbial metal ions disposed therein, wherein (b) and (c) are present in amounts such that the composition, when applied onto a substrate and cured, provides a cured coating that exhibits UV color stability comparable to the UV color stability exhibited by the same composition that does not include (b) and (c), and wherein the halogen counterion-containing onium compound is a monomeric quaternary ammonium salt having the formula: R 4 N + X − where each R is a hydrocarbon and each may be the same or different, and X is a halogen atom.