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Oil-in-water emulsified sunblock cosmetic

A technology for oil-in-water cosmetics, applied in cosmetics, cosmetic preparations, dressing preparations, etc., which can solve the problems of soap not being easily washed off, strong coating of cosmetics, and impaired usability, etc., to achieve Excellent UV protection effect, excellent usability, no film feeling effect

Active 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

[0009] Furthermore, if silicone resin, coating agent, etc. are mixed in a high amount, there may be problems that are different from the ultraviolet protection effect: the coating feeling of the cosmetic after application becomes stronger, the usability is impaired, and the spread during application Poor, can not be easily washed off with common cleansers and soaps, special cleansers must be used

Method used

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  • Oil-in-water emulsified sunblock cosmetic
  • Oil-in-water emulsified sunblock cosmetic
  • Oil-in-water emulsified sunblock cosmetic

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1、2 and comparative example 1～5

[0090] Cosmetics having the compositions listed in Table 1 below were prepared, and the Abs cumulative value before and after the water bath and its change rate were determined.

[0091] [Table 1]

[0092]

[0093] As shown in Table 1, even if the blending amounts of (A) UV protection agent and (B) fatty acid are the same, when the neutralization rate of (B) fatty acid exceeds 51% (Comparative Examples 1-5), the UV protection after water bath The effect is also reduced. On the other hand, when the neutralization rate of (B) fatty acid was 51% or less (Examples 1-2), the ultraviolet protection effect after a water bath increased by about 24% compared with before a water bath.

Embodiment 3、4

[0095] Cosmetics having the compositions listed in Table 2 below were prepared, and the Abs cumulative value before and after the water bath and its change rate were determined.

[0096] [Table 2]

[0097]

[0098] As shown in Table 2, compared with the case of only containing (A) component and (B) component (Example 1), when (C) IOB is 0.5 or more oil (Examples 3 to 4), the water bath The UV protection effect before and after the water bath was significantly improved, and at the same time, the improvement range (Abs change rate) of the UV protection effect before and after the water bath was also significantly increased.

Embodiment 5～15、 comparative example 6

[0100] Cosmetics having the compositions listed in Table 3 and Table 4 below were prepared, and the Abs cumulative value before and after the water bath and its change rate were determined.

[0101] [table 3]

[0102]

[0103] [Table 4]

[0104]

[0105] * Calculate the amount required to neutralize the thickener at the ratio of carbomer: sodium hydroxide = 1:0.5

[0106] As shown in Table 3 and Table 4, even if the type and compounding amount of fatty acid or the combination of other compounding ingredients are changed, as long as the conditions described in claim 1 are satisfied, all cosmetics can be used after water bath compared with before water bath. The characteristic effect of this invention which improves the ultraviolet protection effect is acquired. However, in Comparative Example 6 in which the compounding ratio of the "ultraviolet shielding agent" and "fatty acid" was 10.0, the effect peculiar to the present invention of improving the ultraviolet shielding...

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Abstract

The purpose of the present invention is to provide an oil-in-water emulsified sunblock cosmetic exhibiting an excellent feeling when used and capable of maintaining a high ultraviolet-ray protective effect even upon contact with water or sweat after application. The present invention pertains to an oil-in-water emulsified sunblock cosmetic containing an (A) ultraviolet-ray protective agent and a (B) fatty acid forming a solid at room temperature, the oil-in-water emulsified sunblock cosmetic being characterized in that 51% or less of the fatty acid is neutralized, and the formulation ratio ((A) / (B)) of the (A) ultraviolet-ray protective agent to the (B) fatty acid is in the range of at least 0.1 and less than 10.0. This cosmetic exhibits the unprecedented property of contact with water causing an improvement to the ultraviolet-ray protective ability thereof. It is preferable for the cosmetic to also contain an (C) oily component having an IOB of 0.5 or higher.

Description

technical field [0001] The present invention relates to oil-in-water emulsified sunscreen cosmetics. More specifically, it relates to an oil-in-water emulsified sunscreen cosmetic that has a characteristic that the UV protection effect is further improved than immediately after application by contact with water, sweat, etc., which has not been done before. 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 UV protective cosmetics have been developed. Sunscreen cosmetics (sunscreen cosmetics), which are one type of UV protective cosmetics, block UVA and UVB from reaching the skin by blending ultraviolet absorbers and ultraviolet scattering agents to protect the skin from ultraviolet rays (Non-Patent Document 1). Recently, it is considered that it is important to protect the skin from ultraviolet rays in daily l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61K8/36A61K8/06A61K8/37A61K8/40A61K8/44A61K8/86A61Q17/04
CPCA61K8/36A61K8/37A61K8/40A61K8/44A61Q17/04A61K8/86A61K8/06A61K2800/522A61K8/062A61K8/361
Inventor 八卷悟史佐佐木一贵松井隆山口和弘
Owner SHISEIDO CO LTD
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