Patent ID: 8883312

Claim:
A manufacturing method of surface treated zinc oxide particles, comprising: preparing zinc oxide particles by dropping an aqueous solution of a zinc compound into a continuously stirred alkaline aqueous solution and washing the zinc oxide particles by decantation until conductivity of the zinc oxide particles after washing reaches 1 mS/cm or less, wherein the zinc oxide particles have a crystalline diameter of 16 nm to 20 nm, a specific surface area of 25 m 2 /g to less than 55 m 2 /g, and an average particle diameter of 19 nm to 41 nm, mixing a dispersion liquid with the zinc oxide particles dispersed in a solvent, and a silicone resin having polysiloxane bond and having a silanol group (Si—OH) and alkoxy silyl group (Si—OR, wherein R is alkyl group); then obtaining a mixed solution containing a surface treated zinc oxide particles precursor, with the silicone resin adsorbed on a surface of the zinc oxide particles and the solvent, and drying and solidifying the mixed solution by removing the solvent from the mixed solution and applying heat treatment thereto, to thereby manufacture a dried body, wherein the silicone resin adsorbed on the surface of the zinc oxide particles has a three-dimensional siloxane bond, and pulverizing the dried body, to thereby manufacture the surface treated zinc oxide particles.