| 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
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