Patent ID: 8748001

Claim:
A coating solution for forming a hard coat film comprising composite oxide particles and a matrix-forming component, the composite oxide particles being composite oxide particles having a core-shell structure composed of a core formed from zirconium oxide and a shell formed from antimony pentoxide and/or silica, wherein the composite oxide particles are surface-treated with an organic silicon compound represented by the following formula (1-2) in advance and then an organic silicon compound represented by the following formula (1-1): R 1 (X′) m —Si(OR 2 ) 3 (1-1), where R 1 represents an organic group having 1 to 10 carbon atoms derived from a substituted or unsubstituted hydrocarbon, X′ represents one or more kinds of functional groups selected from a (meth)acryloyl group, an epoxy group (a glycide group), an urethane group, an amino group and a fluoro group, m is an integer of 1 or more, and R 2 represents an organic group having 1 to 10 carbon atoms derived from a substituted or unsubstituted hydrocarbon; Si(OR 3 ) 4 (1-2), where R 3 represents a hydrogen atom, a halogen atom, or an organic group having 1 to 10 carbon atoms derived from a substituted or unsubstituted hydrocarbon groups, wherein the shell in the composite oxide particles is present in a range of 1 to 70% by weight relative to the oxide amount, wherein the organic silicon compound represented by the formula (1-2) includes one or more of tetramethoxysilane, tetraethoxysilane, tetrapropoxysilane, tetrabutoxysilane, wherein the organic silicon compound represented by the formula (1-1) includes one or more of 3,3,3-trifluoropropyltrimethoxysilane, methyl-3,3,3-trifluoropropyldimethoxysilane, β-(3,4-epoxycyclohexyl)ethyltrimethoxysilane, γ-glycidoxymethyltrimethoxysilane, γ-glycidoxymethyltriethoxysilane, γ-glycidoxyethyltrimethoxysilane, γ-glycidoxyethyltriethoxysilane, γ-glycidoxypropyltrimethoxysilane, γ-glycidoxypropyltriethoxysilane, γ-(β-glycidoxyethoxy)propyltrimethoxysilane, γ-(meth)acryloxymethyltrimethoxysilane, γ-(meth)acryloxymethyltriethoxysilane, γ-(meth)acryloxyethyltrimethoxysilane, γ-(meth)acryloxyethyltriethoxysilane, γ-(meth)acryloxypropyltrimethoxysilane, γ-(meth)acryloxypropyltrimethoxysilane, γ-(meth)acryloxypropyltriethoxysilane, 3-ureido-propyltriethoxysilane, perfluorooctylethyltrimethoxysilane, perfluorooctylethyltriethoxysilane, perfluorooctylethyltriisopropoxysilane, trifluoropropyltrimethoxysilane, N-β(aminoethyl)γ-aminopropylmethyldimethoxysilane, N-β(aminoethyl)γ-aminopropyltrimethoxysilane, and N-phenyl-γ-aminopropyltrimethoxysilane, and wherein the treating amount of the organic silicon compound (1-1) is 1 to 50% by weight, on basis that the organic silicon compound (1-1) in the resulting surface-treated composite oxide particles is X—R—SiO 3/2 , and the treating amount of the organic silicon compound (1-2) is 1 to 70% by weight, on basis that the organic silicon compound in the resulting surface-treated composite oxide particles is SiO 2 .