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AssigneeNissan Chemical Corporation
InventorsMasaki Kimata, Yuki Watanabe, Masato Yamaguchi
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A modified metal oxide particle sol, when applied as a coating onto a substrate, is capable of having transparency, a high particle refractive index and good coat resistivity. The modified metal oxide particle sol is composed of modified metal oxide particles (iii) in which stannic oxide particles (i) having an average primary particle size of 4 to 50 nm serve as cores and are coated with metal oxide particles (ii) of at least one metal oxide selected from the group consisting of antimony oxide, stannic oxide and silicon oxide and having an average primary particle size of 1 to 10 nm, which modified metal oxide particles (iii) are dispersed in an organic solvent. The average primary particle size of the core particles (i) and the average primary particle size of the coating particles (ii) satisfy the relationship size of core particles(i)≥size of coating particles(ii), the ratio (total weight of metal oxides other than stannic oxide)/(weight of stannic oxide) is from 0.005 to 1.0, and the sol includes an amine (a) having a water solubility of 0.1 g/L or more and an amine (b) having a water solubility of less than 0.1 g/L.
A modified metal oxide sol comprising modified metal oxide particles dispersed in an organic solvent, the modified metal oxide particles (iii) comprising, as cores, stannic oxide particles (i) which have an average primary particle size of from 4 to 50 nm and are coated with metal oxide particles (ii) that have an average primary particle size of from 1 to 10 nm and are composed of at least one metal oxide selected from the group consisting of antimony oxide, stannic oxide and silicon oxide, wherein the average primary particle size of the core particles (i) and the average primary particle size of the coating particles (ii) satisfy the relationship:
Dependencies are inferred from the claim text.