Porous silica particle, method for producing the same, and cleansing cosmetic containing the same
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United States of America Patent
Stats
-
Feb 13, 2018
Issued Date -
N/A
app pub date -
Oct 2, 2015
filing date -
Oct 2, 2014
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
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.
First Claim
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International Classification(s)
- 2015 Application Filing Year
- A61K Class
- 16157 Applications Filed
- 11882 Patents Issued To-Date
- 73.55 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 0 Citation Count
- A61K Class
- 0 % this patent is cited more than
- 7 Age
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