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AssigneeJGC Catalysts and Chemicals Ltd.
InventorsNaoyuki Enomoto, Satoshi Watanabe, Yasutaka Miyoshi
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An object of the present invention is to provide a porous silica particle with the small specific surface area and the large pore volume, a method for producing the same, and a cosmetic containing the porous silica particle with such characteristics as the texture improver. The porous silica particle according to the present invention has a structure sparsely packed with silica microparticles. The mean particle diameter is 0.5 to 25 μm, the specific surface area measured by the BET method is 5 to 60 m2/cm3, and the pore volume is 0.35 to 2.0 ml/g. In the pore size distribution of the porous silica particles (X axis: pore diameter, Y axis: value obtained by differentiating the pore volume by the pore diameter), the most frequent pore diameter (Dm) satisfies 100<Dm<4000 [nm].
A porous silica particle comprising:
A porous silica particle comprising silica microparticles, the porous silica particle comprising a mean particle diameter (d1) of 0.5 to 25 μm, a specific surface area obtained by the BET method of 5 to 60 m2/cm3, and a pore volume of 0.35 to 2.0 ml/g wherein in a pore size distribution (X axis:
Dependencies are inferred from the claim text.