Composite spherical polymer particles and their production...

Details Composite spherical polymer particles and their production... Composite spherical polymer particles and their production...

C - Chemistry, Metallurgy

08

L

C08L 33/06 (2006.01) A61K 8/02 (2006.01) A61K 8/81 (2006.01) C08F 2/20 (2006.01) C08F 2/44 (2006.01) C08J 3/12 (2006.01) C08K 7/00 (2006.01)

Patent

CA 2677500

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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