Invention Grant
- Patent Title: α-gel-intermediate composition, and production method for α-gel-containing O/W emulsion cosmetic using said composition
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Application No.: US15317798Application Date: 2015-05-28
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Publication No.: US10231909B2Publication Date: 2019-03-19
- Inventor: Reiji Miyahara , Tetsuro Yonezawa , Kenji Kurokawa
- Applicant: SHISEIDO COMPANY, LTD.
- Applicant Address: JP Tokyo
- Assignee: SHISEIDO COMPANY, LTD.
- Current Assignee: SHISEIDO COMPANY, LTD.
- Current Assignee Address: JP Tokyo
- Agency: Lackenbach Siegel, LLP
- Agent Andrew F. Young, Esq.
- Priority: JP2014-122250 20140613
- International Application: PCT/JP2015/065435 WO 20150528
- International Announcement: WO2015/190306 WO 20151217
- Main IPC: A61K8/06
- IPC: A61K8/06 ; A61K8/34 ; A61K8/44 ; A61K8/55 ; A61K8/46 ; A61Q17/04 ; A61Q19/00

Abstract:
The present invention provides an intermediate composition enabling to prepare easily and steadily an α-gel-containing O/W emulsion cosmetic that has a very small viscosity change over time and is excellent in emulsion stability, without using a cooling device that has a heavy burden on cost and the environment, and a production method thereof.An α-gel intermediate composition consisting of (A) 20 to 80 mass % of a mixture containing one or more higher alcohols having 16 or more carbon atoms and an anionic surfactant in the mole ratio of 3:2 to 5:1, and (B) 20 to 80 mass % of a mixture containing one or more water-soluble solvents having the IOB value of 1.5 to 3.5 and water in the mass ratio of 5:5 to 8:2, andwherein the composition is a liquid consisting of a bicontinuous microemulsion phase or a lamellar liquid crystal-dispersed bicontinuous microemulsion phase at 65 to 85° C. and a solid at room temperature.
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