| 摘要 |
PURPOSE: To improve dispersion stability in oil by combining modified particles which are obtained by a process in which fine particles with a specified primary particle size are heat-reacted with specific alkylalkoxysilane in an atmosphere of gas selected from at least one kind of nitrogen, inert gas, etc., and spherical resin beads into composite particles. CONSTITUTION: Modified fine particles are obtained by a process in which fine particles with an average primary particle size of 5-100nm are heat-reacted with alkylalkoxysilane which is expressed by a general formula, R<1> x Si(OR<2> )4-x (R<1> is 4-10C alkyl group, R<2> is 1-3C straight or branched chain alkyl group, and X is 1-3.) in an atmosphere of gas selected from at least one kind of nitrogen, inert gas, and dry air. The modified fine particles and spherical resin beads are combined mechanochemically to prepare a composite product of modified particles. Titanium oxide, zinc oxide, silicon dioxide, aluminum oxide, zirconium oxide, cerium oxide, etc., are used as the fine particles.
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