Invention Grant
US09205033B2 Composite spherical polymer particles and their production process, and cosmetics using the same 有权
复合球形聚合物颗粒及其生产工艺,化妆品使用相同

Composite spherical polymer particles and their production process, and cosmetics using the same
Abstract:
Composite spherical polymer particles contain a nanoparticulate pigment having an average primary particle size of from 0.1 to 0.005 μm, a high molecular dispersant having adsorptive property to the nanoparticulate pigment, and a (meth)acrylic resin. The nanoparticulate pigment is enclosed in a dispersed state in the high molecular dispersant and (meth)acrylic resin. The content of the nanoparticulate pigment ranges from 5 to 70 wt % based on the composite spherical polymer particles. The composite spherical polymer particles have an average particle size of from 1 to 20 μm. A production process of the composite spherical polymer particles and cosmetics containing the composite spherical polymer particles are also disclosed.
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