Infrared blocking particle, method for producing the same, infrared blocking particle dispersion using the same, and infrared blocking base

摘要

Shielding fine particles excellent in water resistance and having excellent infrared ray shielding properties. A tungsten oxide represented by the general formula WyOz and / or a composite tungsten oxide fine particle represented by the general formula MxWyOz, wherein the fine particles have an average primary particle diameter of 1 nm or more and 800 nm or less, Shielding particles coated with a silane-containing silane compound or partial hydrolysis product thereof, and / or an organometallic compound.