Isopropanol → HCID 86755560, compound

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Reaction Steps

To 1,600 g of the anhydrous zinc antimonate aqueous sol used in Example 1 was added 8.0 g of methyltrimethoxysilane (manufactured by Toray Dow Corning Silicone Co., Ltd., trade name SZ6070) and the mixture was stirred at room temperature for 2 hours with a disper. To this were added 1.45 g of diisobutylamine and 2.0 g of malic acid, followed by mixing with stirring at room temperature for 3 hours with a disper to obtain a colloid solution of anhydrous zinc antimonate having the surface of whose particles is coated with methyltrimethoxysilane or its hydrolysate. The colloid solution had a pH of 4.1. The aqueous solvent of the surface-modified anhydrous zinc antimonate colloid solution was substituted by a methanol solvent and then by an isopropyl alcohol solvent using a rotary evaporator to produce surface-modified anhydrous zinc antimonate isopropyl alcohol sol. The resulting isopropyl alcohol sol contain ed 23.0% of ZnO.Sb2O5 and the amount of silane coupling agent coated was 0.9% by weight in terms of SiO2 based on the weight of ZnO.Sb2O5. The solution obtained by mixing this sol with water in a weight ratio of 1:1 had a pH of 4.8, and a primary particle diameter of 15 to 50 nm by transmission electron microscopic observation and aggregated particle size of 224 nm by laser scattering particle size distribution analyzer. A dry product of the sol h ad a volume resistivity of 2,000 Ω·cm.

Provenance & Evidence