Water-in-oil emulsion sunscreen cosmetic

A water-in-oil, cosmetic technology, used in cosmetics, cosmetic preparations, cosmetic preparations, etc., can solve the problems of detrimental usability, poor ductility, and excessive UV protection effect, and achieve excellent usability and washability. , No film formation, good ductility effect

Pending Publication Date: 2017-08-18
SHISEIDO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, since the cosmetics applied to the skin are exposed to various moisture from the inside and outside of the coating film, such as sweat secreted from the skin and moisture from the external environment such as sea water, even if a high proportion of resins and film-forming agents for imparting water resistance are added, It is also difficult to completely prevent the outflow of ultraviolet absorbents, ultraviolet scattering agents, etc.
In addition, even if the outflow of ultraviolet absorbers, etc. can be complet

Method used

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  • Water-in-oil emulsion sunscreen cosmetic
  • Water-in-oil emulsion sunscreen cosmetic
  • Water-in-oil emulsion sunscreen cosmetic

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～5 and comparative example 1～2

[0097] The water-in-oil type emulsified sunscreen cosmetics having the composition described in the following Table 1 were prepared by adding the water phase dissolved by other means to the product obtained by heating and dissolving the oily component and dispersing the powder, and emulsifying by stirring .

[0098] Oil phase thickener ratio=[the total amount of (B) component and (C) component] / [(E) the total amount of non-volatile liquid oil other than silicone oil] ratio was calculated from the compounding quantity of this component.

[0099] Determination of UV protection effect

[0100] On the measurement plate (S plate) (5 × 5cm V-groove PMMA plate, SPFMASTER-PA01), the cosmetics (sample) of each example were measured at 2 mg / cm 2 The amount was added dropwise, applied with fingers for 60 seconds, dried for 15 minutes, and its absorbance was measured using a U-3500 automatic recording spectrophotometer manufactured by Hitachi, Ltd. Co., Ltd. Glycerin without ultraviolet...

Embodiment 10 and comparative example 5

[0111] Water-in-oil type emulsified sunscreen cosmetics having the compositions described in Table 2 below were prepared, and the absorbance change rate before and after the water bath was determined in the same manner as above.

[0112] Film forming agent ratio=[(F) total amount of component] / [(E) total amount of non-volatile liquid oil other than silicone oil] ratio was calculated from the compounding quantity of this component.

[0113] [Table 2]

[0114] Comparative Example 5 Example 10 Cyclomethicone 40 37 Glyceryl tris 2-ethylhexanoate 3 6 2-Ethylhexyl p-methoxycinnamate 5 5 Trimethylsiloxysilicate 4 4 PEG-10 Dimethicone 2 2 Distearyldimethylammonium hectorite 0.5 0.5 Dextrin Palmitate 5 5 Polydimethylsiloxane covered fine particle zinc oxide 20 20 Polydimethylsiloxane covered fine particle titanium oxide 5 5 1,3-Butanediol 5 5 Phenoxyethanol 0.5 0.5 purified water 10 10 ...

Embodiment 11～18 and comparative example 6

[0117] Water-in-oil type emulsified sunscreen cosmetics having the compositions described in the following Tables 3 and 4 were prepared, and the absorbance change rate before and after the water bath was determined in the same manner as above.

[0118] [table 3]

[0119]

[0120] [Table 4]

[0121]

[0122] As shown in Table 3 and Table 4, even if the kind of the oil phase thickener ((C) component) was changed, the UV protection effect was higher after the water bath than before the water bath (Examples 11-18). On the other hand, when the component (C) was not blended, the ultraviolet protection effect after the water bath decreased (comparative example 6).

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Abstract

Provided is a water-in-oil emulsion sunscreen cosmetic having a property not present in the prior art, of improved UV protection due to contact with water and/or sweat compared to directly after application, and which is also pleasant to use and easy to wash off. This water-in-oil emulsion sunscreen cosmetic contains: 6-40 mass % of a UV protector (A), an organic modified clay mineral (B), and an oil phase thickening agent (C) other than (B), and a silicone-based surfactant (D) having an HLB value of less than 8, wherein the ratio [total quantity of component (B) and component (C)]/[total quantity of non-volatile liquid oil components other than silicone oil (E)] is at least 0.04 but less than 0.68.

Description

technical field [0001] The present invention relates to water-in-oil emulsified sunscreen cosmetics. More specifically, it relates to a water-in-oil emulsified sunscreen cosmetic that has an unprecedented characteristic of improving the UV protection effect by contact with water, sweat, etc. compared with just after application, and is excellent in use feeling and can be washed easily. Background technique [0002] Protecting the skin from ultraviolet rays is one of the most important issues in skin care and body care. In order to minimize the adverse effects of ultraviolet rays on the skin, various anti-UV cosmetics have been developed. Sunscreen cosmetics (sunscreen cosmetics), which are one type of UV protection cosmetics, block UVA and UVB from reaching the skin by compounding ultraviolet absorbers and ultraviolet scattering agents (Non-Patent Document 1). Recently, it is important to protect the skin from ultraviolet rays not only in outdoor activities such as swimming...

Claims

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Application Information

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IPC IPC(8): A61K8/73A61K8/06A61K8/25A61K8/27A61K8/36A61K8/37A61K8/40A61K8/44A61K8/49A61K8/60A61K8/894A61K8/895A61Q17/04
CPCA61K8/25A61K8/27A61K8/36A61K8/37A61K8/40A61K8/44A61K8/49A61K8/60A61Q17/04A61K8/894A61K8/895A61K2800/522A61K8/064A61K8/732A61K8/06A61K8/73A61K8/585A61K8/8129A61K8/891A61K2800/48
Inventor 八卷悟史佐佐木一贵松井隆渡边百合香田代麻友里永礼由布子东亚智·玛丽安·彩香山口和弘
Owner SHISEIDO CO LTD
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