ZIRCONIUM OXIDE DISPERSION, METHOD FOR PRODUCTION THEREOF AND RESIN COMPOSITION CONTAINING SAME Russian patent published in 2014 - IPC C01G25/02 

FIELD: chemistry.

SUBSTANCE: invention can be used in chemical industry. The zirconium oxide dispersion is obtained by reacting a zirconium salt with an alkali in water to obtain a suspension of zirconium oxide particles. The suspension is filtered, washed and repulped. An organic acid is added to the obtained suspension in amount of one molar part or more per molar part of zirconium in the suspension and the suspension is subjected to hydrothermal treatment at temperature of 170°C or higher. The obtained aqueous dispersion of zirconium oxide particles is then washed and thickened. The zirconium oxide dispersion contains zirconium oxide particles in amount of 20 wt % or more, has low viscosity and is characterised by a transmittance factor of 35% or more at wavelength of 400 nm, transmittance factor of 95% or more at wavelength of 800 nm and viscosity of 20 mPa·s or less at temperature of 25°C.

EFFECT: zirconium oxide dispersion can be used in optical products, such as sealing resin for LEDs or an antireflection film.

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