| titleOfInvention |
Heat-ray-shielding microparticles, heat-ray-shielding microparticle liquid dispersion, coating liquid for heat-ray-shielding film, and heat-ray-shielding film, heat-ray-shielding resin film, and heat-ray-shielding microparticle dispersion body that use said microparticles, liquid dispersion, or coating liquid |
| abstract |
To provide heat-ray shielding fine particles having high visible light transmittance and at the same time excellent heat ray shielding effect and stable weather resistance, heat ray shielding fine particle dispersion liquid, coating liquid for a heat ray shielding layer using the heat ray shielding fine particles, and a heat ray shielding layer, a heat ray shielding resin film, and a heat ray shielding fine particle dispersion body using them, which are heat ray shielding fine particles containing calcium lanthanum boride fine particles represented by a general formula Ca<sub>x</sub>La<sub>1-x</sub>B<sub>m</sub>, a shape of each fine particle of the calcium lanthanum boride fine particles satisfies at least one of the following: 1) when scattering intensity of the calcium lanthanum boride fine particles diluted and dispersed in a solvent is measured using small-angle X-ray scattering, value Ve of a slope of a straight line is -3.8 ≤ Ve ≤ -1.5, 2) the particle shape is a flat cylindrical shape, or a flat spheroidal (wherein a length of a long axis is d and a length of a short axis is h) shape, with a value of aspect ratio d / h being 1.5 ≤ d / h ≤ 20. |