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Water-in-oil emulsified cosmetics

A technology for emulsified cosmetics and water-in-oil type, which is used in cosmetics, cosmetics, cosmetic preparations, etc., can solve the problems of drug limitation, difficulty in emulsification, and difficulty in high-mixing drugs, and achieves full stability, high drug effect, and drug range. wide effect

Active Publication Date: 2017-04-19
SHISEIDO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in the conventional low-viscosity water-in-oil emulsified cosmetics as described above, when a polar oil is added to improve the feeling of use, etc., the distribution amount of the surfactant to the oil phase increases, making it difficult to emulsify, and the stability significantly impaired tendency
In addition, polar oils have the effect of stably dissolving various pharmaceuticals such as ultraviolet absorbers that have low solubility in nonpolar oils. The medicines to be mixed are limited, and it is difficult to mix medicines at a high level, etc.
As a result, for example, in order to obtain a high SPF effect, it is necessary to use a double-layer separation type in which the oil phase and the water phase are separated during storage, which is poor in operability and the like.

Method used

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  • Water-in-oil emulsified cosmetics
  • Water-in-oil emulsified cosmetics
  • Water-in-oil emulsified cosmetics

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0066] Hereinafter, although an Example is given and this invention is demonstrated in more detail, this invention is not limited by these Examples. Regarding the compounding quantity, unless otherwise specified, it shows mass %. Before the examples, the evaluation method used in the present invention will be described.

[0067] (1) Stability

[0068] The appearance of the sample stored at room temperature (25° C.) for one month was evaluated according to the following criteria.

[0069] ◯: Separation of water or oil was not confirmed in the appearance.

[0070] ×: Within 1 month, separation of water or oil was confirmed in the appearance.

[0071] (2) Viscosity

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Abstract

The present invention provides a water-in-oil type emulsified cosmetic that maintains excellent stability even when polar oil is blended, although it has a low viscosity. The water-in-oil emulsified cosmetic of the present invention is characterized by containing: (A) 0.1 to 2 mass % of organically modified clay minerals, (B) 0.1 to 2 mass % of hydrophobic silica, (C) silicone-based surface 2 to 5% by mass of active agent, (D) 10 to 50% by mass of the total oil is oil of non-polar hydrocarbon oil, and (E) 20 to 60% by mass of aqueous phase component, the aforementioned (A) organically modified clay mineral and (B) the total of hydrophobic silica is 0.2 to 2% by mass, and the viscosity of the cosmetic as a whole is 1,000 to 10,000 mPa·s (30°C, B-type viscometer).

Description

technical field [0001] The present invention relates to water-in-oil emulsified cosmetics. More specifically, it relates to a low-viscosity water-in-oil emulsified cosmetic that is excellent in stability and does not need to be re-emulsified by shaking at the time of use. Background technique [0002] Conventionally, water-in-oil emulsified compositions that use an oil phase as an external phase and a water phase as an internal phase can effectively spread oil-soluble active ingredients such as emollient oils, oil-soluble pharmaceuticals, and ultraviolet absorbers. On the skin, it is a dosage form suitable for external preparations for the skin, and is widely used in the field of cosmetics such as creams for skin care, lotions, and creams for hair care. [0003] However, most water-in-oil emulsified cosmetics achieve stabilization by gelling the oil constituting the external phase to fix water droplets and reduce the frequency of collisions between particles, which may inev...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61K8/06A61K8/25A61K8/31A61K8/37A61K8/894A61Q1/02A61Q19/00
CPCA61K8/25A61K8/31A61K8/37A61Q1/02A61Q19/00A61K8/894A61K8/26A61K8/064A61K8/062A61K8/58A61K8/891A61K8/92
Inventor 北岛正树佐藤知子八卷悟史
Owner SHISEIDO CO LTD
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