| 简介 |
PROBLEM TO BE SOLVED : To provide a dispersion liquid of infrared-shielding material fine particles having excellent infrared-shielding performance and visible light transmitting performance and capable of suppressing decrease in the infrared-shielding characteristic with time.
SOLUTION : The dispersion liquid of infrared-shielding material fine particles comprises infrared-shielding material fine particles and a dispersant in a solvent. The infrared-shielding material fine particles are composed of at least one type of oxide fine particles selected from tungsten oxide fine particles represented by a general formula of WyOz (where y and z satisfy 2.2≤(z/y)≤2.999) and composite tungsten oxide fine particles represented by a general formula of MxWyOz (where M is at least one element selected from alkaline metals, alkaline earth metals, rare earth elements, Mg and the like, and x, y and z satisfy 0.001≤(x/y)≤1 and 2.2≤(z/y)≤3). The dispersant is a polymeric compound having an acrylate copolymer as the main chain and a phosphate group as a side chain, in which the phosphate group of the dispersant is adsorbed to the surface of the infrared-shielding material fine particles.
SELECTED DRAWING : None
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