SILICA SOL AND METHOD FOR PRODUCING SILICA SOL

摘要

The present invention addresses the problem of providing a silica sol which has excellent moisture adsorption resistance and stability, has high purity, and does not undergo discoloration when used in a solvent or a resin. The silica sol according to the present invention is characterized by comprising high-purity silica particles which satisfy the requirements (a) to (c) mentioned below and a medium which comprises water and/or a liquid organic medium and in which the silica particles are dispersed, and is also characterized in that an organic basic compound is contained in the silica sol: (a) the silica sol has a specific surface area of 20 to 500 m 2 /g as determined by a nitrogen adsorption method; (b) the amount of moisture adsorbed per a specific surface area of the silica particles is 0.5 mg/m 2 or less; and (c) each of the silica particles does not substantially contain an organic basic compound in the inside thereof.