Porous silica particle, method for producing the same, and cleansing cosmetic containing the same

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United States of America Patent

PATENT NO 9889072
SERIAL NO

15512985

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Abstract

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A porous silica particle with the small specific surface area and large pore volume, which is contained as the scrubbing agent in the cleansing cosmetics is provided. The porous silica particle has high collapsibility, and therefore the damage of the skin can be prevented. A porous silica particle according to the present invention has: an average circularity of 0.1 to 0.5; a pore volume of 0.1≦Pv<1.0 ml/g; a specific surface area of 5 to 60 m2/cm3; a median size of 100 to 1000 μm; a ratio of a maximum particle diameter to the median size, of 3.0 or less; and a median size of 5 to 40 μm and a maximum particle diameter of 15 to 200 μm, after rubbing for 30 seconds with a load of 1.0 to 1.4 KPa.

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Patent Owner(s)

Patent OwnerAddress
JGC CATALYSTS AND CHEMICALS LTD16F SOLID SQUARE E BLDG 580 HORIKAWA-MACHI SAIWAI-KU KAWASAKI-CITY KANAGAWA 212-0013

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Enomoto, Naoyuki Kitakyushu, JP 38 77
Miyoshi, Yasutaka Kitakyushu, JP 7 24
Watanabe, Satoshi Kitakyushu, JP 523 4776

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