Coating Composition, Its Coating Film, Antireflection Film, and Image Display Device

A coating film characterized by comprising (1) titanium dioxide fine particles with reduced photocatalytic activity, wherein the titanium dioxide fine particles are obtained by surface-treating titanium dioxide fine particles doped with cobalt capable of capturing free electrons and/or holes, with an organometal compound of Zn capable of capturing free electrons and/or holes, (2) a dispersant and (3) a cured binder, wherein

• (1) the titanium dioxide fine particles and (2) the dispersant are uniformly mixed into (3) the cured binder,
• the coating film has a refractive index of 1.55 to 2.20 when the thickness of the film after curing is 0.05 to 10 μm,
• the haze value of the coating film as measured integrally with a base material according to JIS K 7361-1 is not different from the haze value of the base material per se, or is different by not more than 1% from the haze value of the base material per se.

A coating film characterized by comprising (1) titanium dioxide fine particles with eliminated or reduced photocatalytic activity, wherein the titanium dioxide fine particles are obtained by surface-treating titanium dioxide fine particles doped with cobalt capable of capturing free electrons and/or holes, with an organometal compound of Zn capable of capturing free electrons and/or holes, and further coating the surface treated titanium dioxide fine particles with an anionic polar group-containing organic compound and/or organometal compound, (2) a dispersant and (3) a cured binder, wherein

• (1) the titanium dioxide fine particles and (2) the dispersant are uniformly mixed into (3) the cured binder,
• the coating film has a refractive index of 1.55 to 2.20 when the thickness of the film after curing is 0.05 to 10 μm,
• the haze value of the coating film as measured integrally with a base material according to JIS K 7361-1 is not different from the haze value of the base material per se, or is different by not more than 1% from the haze value of the base material per se.

A coating film characterized by comprising (1) titanium dioxide fine particles with eliminated or reduced photocatalytic activity, wherein the titanium dioxide fine particles are obtained by coating titanium dioxide fine particles doped with cobalt capable of capturing free electrons and/or holes, with an inorganic compound capable of reducing or eliminating photocatalytic activity, and further surface-treating the coated titanium dioxide fine particles with an organometal compound of Zn capable of capturing free electrons and/or holes, (2) a dispersant and (3) a cured binder, wherein

• (1) titanium dioxide fine particles and (2) the dispersant are uniformly mixed into (3) the cured binder,
• the coating film has a refractive index of 1.55 to 2.20 when the thickness of the film after curing is 0.05 to 10 μm,
• the haze value of the coating film as measured integrally with a base material according to JIS K 7361-1 is not different from the haze value of the base material per se, or is different by not more than 1% from the haze value of the base material per se.

A coating film characterized by comprising (1) titanium dioxide fine particles with eliminated or reduced photocatalytic activity, wherein the titanium dioxide fine particles are obtained by coating titanium dioxide fine particles doped with cobalt capable of capturing free electrons and/or holes, with an inorganic compound capable of reducing or eliminating photocatalytic activity, further surface-treating the coated titanium dioxide fine particles with an organometal compound of zinc capable of capturing free electrons and/or holes, and further coating the surface treated titanium dioxide fine particles with an anionic polar group-containing organic compound and/or organometal compound and (2) a dispersant, and (3) a cured binder, wherein

• (1) titanium dioxide fine particles and (2) the dispersant are uniformly mixed into (3) the cured binder,
• the coating film has a refractive index of 1.55 to 2.20 when the thickness of the film after curing is 0.05 to 10 μm,
• the haze value of the coating film as measured integrally with a base material according to JIS K 7361-1 is not different from the haze value of the base material per se, or is different by not more than 1% from the haze value of the base material per se.