METHOD FOR MANUFACTURING HIGH PURITY SILICA SOL DISPERSED IN HYDROPHILIC ORGANIC SOLVENT, HIGH PURITY SILICA SOL DISPERSED IN HYDROPHILIC ORGANIC SOLVENT OBTAINED BY THE METHOD, METHOD FOR MANUFACTURING HIGH PURITY SILICA SOL DISPERSED IN ORGANIC SOLVENT, AND HIGH PURITY SILICA SOL DISPERSED IN ORGANIC SOLVENT OBTAINED BY THE METHOD

摘要

PROBLEM TO BE SOLVED: To provide a method for manufacturing high purity silica sol dispersed in a hydrophilic organic solvent, the sol to be used as a raw material for an electronic material, a film material, a polishing material of an organic surface, or the like, requiring high purity, and to prepare a high purity silica sol dispersed in the hydrophilic organic solvent obtained by the method, to provide a method for manufacturing high purity silica sol dispersed in an organic solvent, and to prepare high purity silica sol dispersed in the organic solvent obtained by the method.;SOLUTION: The method for manufacturing the high purity silica sol dispersed in the hydrophilic organic solvent includes: (a) a first process of hydrolyzing alkoxisilanes in an alcohol aqueous solution; (b) a second process of concentrating the silica sol solution obtained by the hydrolysis; (c) a third process of adding a silane coupling agent for coupling treatment and then controlling the pH of the silica sol solution to neutral; and (d) a fourth process of substituting the hydrophilic organic solvent for the water content in the silica solution.;COPYRIGHT: (C)2004,JPO