Patent ID: 7115303

Claim:
A process for producing spherical composite cured melamine resin particles, comprising: reacting a melamine compound with an aldehyde compound in an aqueous medium under a basic condition in the presence of a suspension of colloidal silica having an average particle size of 5 to 70 nm to produce an aqueous solution of a precondensate of water-soluble melamine resin; adding an acid catalyst to the aqueous solution to separate out spherical composite cured melamine resin particles; and mixing the spherical composite cured melamine resin particles with inorganic compound particles directly or in an aqueous medium to coat the surface of the spherical composite cured melamine resin particles with the inorganic compound particles; wherein the inorganic compound particles have an average particle size of one fifth (⅕) or less based on an average particle size of the spherical composite cured melamine resin particles.