A method of manufacturing the same, and the organic solvent-dispersed silica sol, dicarboxylic acid anhydride dispersed silica sol and polymerizable compound dispersed silica sol and silica colloidal particles

摘要

The average content of the polyvalent metal element M is at least one selected from the group consisting of iron, aluminum, zinc, zirconium, titanium, tin and lead, 0.001 to the present invention, 0 the M / Si molar ratio is .02, 5 to A colloidal silica particles having an average primary particle diameter of 40nm, the content of the polyvalent metal element M present in the outermost layer of the colloidal particles, 0 surface area of 1nm ² per the colloidal particles silica colloidal particles, and I related the organic solvent-dispersed silica sol, the dicarboxylic acid anhydride dispersed silica sol and polymerizable compound dispersed silica sol not to 0.003 pieces. According to the colloidal silica particles of the present invention, when it is dispersed in an organic compound, the decomposition of the organic compound by the action of solid acid on the surface, there is no possibility that coloration is caused. Also, according to the silica sol of the present invention, the dispersion stability of the dispersion medium is a good decomposition of resin, and does not cause coloration be incorporated into the resin.