| 摘要 |
PROBLEM TO BE SOLVED: To obtain a composition, higher in refractive index than the conventional one, capable of forming a coating film having a sufficient film hardness, and useful for displays or the like, by including highly crystalline, superfine particles of TiO2 prepared by the vapor-phase process. SOLUTION: This composition contains (A) superfine particles of anatase type TiO2 having a half width of the X-ray diffraction peak of the (101) face of 0.7 deg. or less and particle and crystalline size of 100 nm or less, and preferably accounting for at least 70 wt.% based on the total quantity of TiO2 present in the composition. It also contains (B) a binder, preferably containing at least one type of monomer, oligomer or polymer having, in the molecule, at least two of vinyl, allyl and (meth)acryloyl groups, and also at least one type of metal alkoxide or hydrolyzate thereof, wherein the metal is Ti, Nb, Ta, Zr or In.
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