| abstract |
(57) 【Abstract】 PROBLEM TO BE SOLVED: To disperse nanometer-scale colloidal silica fine particles in the state of primary particles, to obtain a dental composite filler obtained by pulverizing a composite obtained by a low cost and simple method, And a dental material containing the same, which is excellent in filling property, low shrinkage property, abrasion resistance, polishing property, rigidity, transparency and the like. SOLUTION: An average particle size of 50 n is provided on the surface of polymer particles obtained by aqueous emulsion polymerization of a radically polymerizable vinyl compound. A composite having a structure for attaching colloidal silica of m or less is included. |