Ester-dispersed silica sol and production method therefor

Abstract

A silica sol uses a carboxylic acid ester as a dispersion medium and a method for produces the same. The silica sol contains, as dispersoids, silica particles in which an alkoxy group represented by Si—OR1 is present on or near surfaces of silane-treated silica particles, a solvent containing a carboxylic acid ester having an R2—COO—R1 structure as a dispersion medium, and an amine. The dispersoids are silica particles in which at least two types of alkoxy groups represented by Si—OR0 and Si—OR1 are present and which have a molar ratio (Si—OR1)/(Si—OR0) of 0.002 to 50. Si—OR0 is Si—OCH3 or Si—OC2H5. The silica particles have an average particle diameter of 5 to 200 nm determined by a dynamic light scattering method.

Dependencies are inferred from the claim text.