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Water-in-oil composition

A water-in-oil type, composition technology, which is applied in the directions of cosmetics, cosmetic preparations, pharmaceutical formulations, etc., can solve the problems of white turbidity, non-uniformity, and whitening of the composition, and achieve the effect of inhibiting aggregation/settling.

Pending Publication Date: 2022-04-12
SHISEIDO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, hydrophobized inorganic powders are also prone to aggregation / sedimentation in the oil phase, and may cause cloudiness / unevenness of the composition and whitening when applied to the skin

Method used

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Experimental program
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Embodiment Construction

[0038] Hereinafter, preferred embodiments of the present invention will be described.

[0039] The water-in-oil composition according to the present invention is a composition in which a water phase and a silicone-treated powder are independently dispersed in an oil phase.

[0040] [oil phase]

[0041] In the present invention, the dispersion medium is an oil phase. Especially in the present invention, when silicone oil is used as the main body and other oily components are included, it is suitable that the mass ratio of silicone oil / oil phase is 0.65 or more, preferably 0.75 or more. .

[0042] Examples of silicone oils include dimethylpolysiloxane, octamethylsiloxane, decamethyltetrasiloxane, methylhydrogenpolysiloxane, methylphenylpolysiloxane, hexamethylcyclic Tripolysiloxane, octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, etc.

[0043] Moreover, when containing a cyclic siloxane, it is preferable that the compounding quantity is 10 mass % or less in a comp...

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Abstract

Provided is a water-in-oil composition in which aggregation and sedimentation of a powder do not easily occur in an oil phase in which a hydrophobized powder is blended. The water-in-oil composition according to the present invention is characterized by comprising: an oil phase having a silicone oil / oil phase mass ratio of 0.65 or more; a silicone-treated powder dispersed in the oil phase and treated with a silicone-based surface treatment agent; a polyglycerol-modified silicone dispersant in which the silicone-treated powder is dispersed in an oil phase; an aqueous phase dispersed in the oil phase; and an emulsifier that disperses the aqueous phase in an oil phase. The mass ratio of the silicone-treated powder to the total powder is 0.7 or more.

Description

[0001] related application [0002] This application claims the priority of Japanese Patent Application No. 2019-161685 filed on September 5, 2019, the contents of which are incorporated herein. technical field [0003] The present invention relates to the improvement of the dispersibility of the water-in-oil composition, especially its hydrophobized powder. Background technique [0004] Hydrophobic powders exhibit water resistance on the application surface and are less prone to peeling off due to sweat, etc., so they are used in various cosmetics and the like. For example, in order to reduce the influence of ultraviolet rays on the skin, sunscreen cosmetics are widely used, and they are roughly divided into products using ultraviolet scattering powders as ultraviolet shielding agents, and products using organic ultraviolet absorbers as ultraviolet shielding agents. [0005] Most of the organic UV absorbers are classified as ester oils, which can be dissolved in the oil ph...

Claims

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Application Information

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IPC IPC(8): A61K8/06A61K8/58A61K8/86A61K8/894A61K8/891A61Q1/02A61Q17/04
CPCA61K8/19A61K8/92A61Q19/00A61K8/894A61K8/06A61K8/891
Inventor 氏本慧
Owner SHISEIDO CO LTD