Polysiloxane-coated metal oxide particles, dispersion liquid, composition, cosmetic, and method for producing polysiloxane-coated metal oxide particles

Abstract

The present invention also addresses the problem of providing a dispersion liquid, a composition and a cosmetic each containing the dimethylpolysiloxane-coated metal oxide particles. The present invention also addresses the problem of providing a method for producing the dimethylpolysiloxane-coated metal oxide particles. The present invention relates to: polysiloxane-coated metal oxide particles, in which the surfaces of metal oxide particles are coated with dimethylpolysiloxane, and which have a hydroxyl group detection ratio of 10% or less; and a method for producing polysiloxane-coated metal oxide particles, the method comprising a surface treatment step for mixing metal oxide particles with dimethylpolysiloxane having a kinematic viscosity of 500 mm2/s to 4000 mm2/s inclusive at 25° C., without using a solvent, to coat the surfaces of the metal oxide particles with the dimethylpolysiloxane and a step for subjecting the dimethylpolysiloxane-coated metal oxide particles to a heat treatment at 250° C. to 380° C. inclusive.

Dependencies are inferred from the claim text.