Skin cosmetic composition
AssigneeKao Corporation
InventorsShigefumi SAKAI, Atsuyuki Kiba, Chitoshi Shigeno, Hideaki Kubo
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Abstract
A skin cosmetic composition comprising: a hydrogel particle comprising a non-crosslinked hydrogel containing an oil component therein dispersed in an aqueous medium; a hydrogel particle comprising a non-crosslinked hydrogel containing an oil component therein; and a process for preparing a hydrogel particle comprising the steps of discharging an oil component-emulsified or dispersed solution prepared by dissolving a non-crosslinked hydrogel in an aqueous solution, with vibration from an orifice to form droplets; and cooling the droplets to solidify.
Claims10
1-19. (canceled)
A process for preparing hydrogel particles comprising the steps of:
- discharging an O/W-type dispersion which is prepared by dissolving a water-soluble polymer capable of forming a non-crosslinked hydrogel in an aqueous solution and emulsifying an oil component therein, with vibration at a frequency of 5 to 200 Hz from an orifice to form droplets;
- and
- cooling the droplets to solidify.
The process according to claim 1, wherein the oil component is emulsified or dispersed in the aqueous component solution with at least one of an emulsifying agent and a dispersing agent.
The process according to claim 1, wherein the non-crosslinked hydrogel is made of agar or gelatin.
The process according to claim 1, wherein the non-crosslinked hydrogel is made of agar having a gel strength of not more than 68.6 kPa.
The process according to claim 1, wherein not less than 80% by weight of the hydrogel particles have a ratio of a longest diameter to a shortest diameter (longest diameter/a shortest diameter) of not more than 1.7.
The process according to claim 1, wherein the hydrogel particles have a CV value for particle diameter of 5 or less.
The process according to claim 1, wherein the hydrogel particles have a shape having rotation symmetry.
The process according to claim 1, wherein the hydrogel particles are spherical.
The process according to claim 1, wherein the orifice has a diameter of from 0.1 to 5 mm.
Dependencies are inferred from the claim text.