O / W / O / W type emulsified cosmetic.

The O/W/O/W type emulsified cosmetic composition enhances stability by using dipentaerythrityl tripolyhydroxystearate in the oil phase and a water-soluble polymer in the outer aqueous phase, addressing the instability issues of W/O/W cosmetics and enabling stable incorporation of polar oily components.

JP2026087313APending Publication Date: 2026-05-27JO COSMETICS
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Patent Information

Application Number
JP2024199949
Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
Filing Date
2024-11-15
Publication Date
2026-05-27

AI Technical Summary

Technical Problem

Conventional W/O/W type emulsified cosmetics suffer from poor stability over time, and incorporating polar oily components further destabilizes the emulsion.

Method used

An O/W/O/W type emulsified cosmetic composition is developed, where a W/O type emulsion with dipentaerythrityl tripolyhydroxystearate in the oil phase and a water-soluble polymer in the outer aqueous phase maintain the dispersion state of droplets, preventing phase separation and instability.

Benefits of technology

The O/W/O/W type emulsion achieves improved temporal stability by separating the inner and outer aqueous phases, allowing incorporation of polar oily components without compromising stability and enabling formulation with various active ingredients.

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Abstract

The present invention provides a novel emulsified cosmetic that maintains the properties of W / O / W type emulsified cosmetics, improves their stability over time, and allows for the incorporation of polar oily components without impairing the system's stability. [Solution] An O / W / O / W type emulsified cosmetic is provided, in which an O / W / O type emulsion is dispersed in an aqueous phase, comprising an O / W type emulsion in which an inner oil phase containing a polar component (A) is dispersed in an aqueous phase, and an oil phase containing dipentaerythrityl tripolyhydroxystearate (B) and not containing the polar component (A) is dispersed in an aqueous phase, wherein the O / W / O type emulsion is dispersed in an aqueous phase containing a water-soluble polymer. Specific examples of the polar component (A) include oil-soluble vitamins, carotenoids, essential oils, and oil-soluble ultraviolet absorbers, and specific examples of the water-soluble polymer include carbomers, alkyl-modified carboxyvinyl polymers, 2-acrylamido-2-methylpropanesulfonic acid-based water-soluble polymers, hydrophobic-modified polyether urethanes, and hydrophobic-modified alkylcelluloses.
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Citation Information

Patent Citations

  • W / O / W type emulsified cosmetic

    JP2002275029A

  • Water-in-oil type emulsified cosmetic

    JP2008174514A