Patent ID: 7514498

Claim:
A coating composition having self-cleaning property comprising: (a) 1-15 wt % of first inorganic particles that contain hydroxy group and have an average particle diameter of between 5 and 30 nm; (b) 0.05-3 wt % of second inorganic particles that contain hydroxy group and have an average particle diameter of between 0.2 and 5 μm; (c) 1-15 wt % of an organosilane compound represented by the following formula (1); (d) 50-85 wt % of a solvent; (e) 0.1-3 wt % of photocatalyst particles; (f) 1-10 wt % of the hydrolyzate of alkoxysilane-functionalized aromatic UV absorbing agent represented by the following formula (2); (g) 0.001-2 wt % of an acid; (h) 1-10 of a heat curling catalyst; and (i) 1-10 wt % of aqueous polyurethane emulsion; R n Si(OR′) 4-n (I) [Formula 1] wherein R is a C1-C8 aminoalkyl group, glycidoxyalkyl group or isocyanatoalkyl group; R′ is a C1-C6 lower alkyl group; and n is an integer of between 0 and 3; wherein R 1 and R 2 independently represent a C1-C6 alkyl group; R 3 represents a C1-C6 alkyl group or aryl group; OR 4 represents a methoxy, ethoxy, propoxy, isopropoxy, butoxy or acetoxy group; R 5 represents a C1-C12 alkyl group or aryl group; X represents a hydrogen atom or halogen atom; l is an integer of between 5 and 9; m is an integer of between 1 and 3; and n is an integer of between 0 and 2.