Patent ID: 9284197
Filing Date: 2016-03-15
CPC Classification: B82Y,C01B,C01P,C08K

Claim Text:
1. An organic solvent-dispersed silica sol comprising: colloidal silica particles comprising at least one polyvalent metal element M selected from a group consisting of iron, aluminum, zinc, zirconium, titanium, tin, and lead in an average content of 0.001 to 0.02 in terms of an M/Si molar ratio, and having an average primary particle diameter of 5 to 40 nm, wherein a content of the polyvalent metal element M present in an outermost layer of the colloidal silica particles is 0 to less than 0.001 atom per square nanometer (nm an organic solvent; wherein the colloidal silica particles are non-porous, and the colloidal silica particles being dispersed in the organic solvent.