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Water-in-oil emulsified sunscreen cosmetics

A water-in-oil type, cosmetic technology, applied in the direction of cosmetics, cosmetic preparations, cosmetic preparations, etc., can solve the problems of increasing ultraviolet absorption capacity, undocumented and mentioned, etc., and achieve the effect of excellent ultraviolet defense promotion effect

Active Publication Date: 2011-12-28
SHISEIDO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this Patent Document 3 also fails to describe or mention the fact that ultraviolet absorbing ability (=promoting effect of ultraviolet absorbing ability) is significantly increased by using an ultraviolet absorber and a water-soluble polymer in combination in a water-in-oil type emulsified sunscreen cosmetic.

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～8

[0052] (Examples 1-8, Comparative Examples 1-8)

[0053]For the ultraviolet absorbing ability increasing effect (= ultraviolet absorbing promoting effect) brought by the combination of water-soluble polymer in the ultraviolet absorbing agent, the test was carried out using the low-viscosity samples of the compositions shown in the following Tables 2 to 3, and perform evaluations. In addition, in Tables 2 to 3, "comparative example" is a system containing an ultraviolet absorber but not a water-soluble polymer, and "example" is a system in which an ultraviolet absorber and a water-soluble polymer are used in combination.

[0054]

[0055] (experiment method)

[0056] at 2mg / cm 2 Each sample was coated on the substrate for coating, and the extreme of the ultraviolet absorption spectrum of each ultraviolet absorber contained in the sample was measured using a spectrophotometer ("U-4100"; manufactured by Hitachi High-Technologies Corporation). UV absorbance (abs.) at maximum ...

Embodiment 9

[0079] (embodiment 9, comparative example 9)

[0080] The usability of Example 9 (agar compounding prescription) and Comparative Example 9 (no agar compounding) shown in Table 4 were comparatively evaluated by using female judges (10 persons).

[0081] For each evaluation item, whether or not the usability of Example 9 is improved compared with Comparative Example 9 was evaluated according to the following evaluation criteria. The results are shown in Table 5. In addition, there is no evaluation that the usability of Example 9 is lower than that of Comparative Example 9.

[0082] (evaluation standard)

[0083] A + : 7 or more out of 10 respondents answered that it has improved

[0084] A: More than 5 out of 10 respondents answered that it has improved

[0085] B: 3 or more out of 10 respondents answered that it has improved

[0086] C: Less than 2 out of 10 answers have improved

[0087] Table 4

[0088] Example 9

Comparative example 9

Distearyldi...

Embodiment 10

[0093] (Example 10: water-in-oil type emulsified sunscreen lotion)

[0094]

[0095]

[0096] (Manufacturing method)

[0097] (7) and (8) were mixed and dissolved at 80° C., and added to the oil phase of (1) to (6). Next, (9) to (11) were added, and dispersion mixing was performed using a disperser. After mixing (12) to (16) at 95°C and heating to dissolve, slowly add to the oil phase while stirring with a disperser, mix well and uniformly, and then rapidly cool to 25°C to obtain the target sunscreen lotion.

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PUM

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Abstract

Disclosed is a water-in-oil-type emulsion sunscreen cosmetic which has an extremely excellent ultraviolet radiation protection-enhancing effect (an effect of boosting an ultraviolet ray absorption ability) over a broad ultraviolet radiation region, has excellent usability (a smooth feeling, a dry feeling, a non-sticky feeling and the like), and has a low viscosity. Specifically disclosed is a water-in-oil-type emulsion sunscreen cosmetic which comprises (a) 0.01 to 10% by mass of a water-soluble polymer and (b) 0.01 to 30% by mass of an ultraviolet ray absorber, and which has a viscosity of 10,000 mPas (as measured on a B-type viscometer at 30 DEG C) or less and contains an aqueous phase in an amount of 45% by mass or less.

Description

technical field [0001] The present invention relates to water-in-oil emulsified sunscreen cosmetics. More specifically, it relates to a low-viscosity water-in-oil emulsified sunscreen cosmetic that has an extremely excellent UV protection promotion effect in a wide range of ultraviolet rays and is excellent in usability (smooth, refreshing, non-sticky, etc.). Background technique [0002] The main ultraviolet absorption wavelength regions of sunscreen cosmetics are UV-A region (320-400nm) and UV-B region (290-320nm). In the past, it was believed that ultraviolet rays in the UV-A region would darken the skin, but they would not cause sunburn and promote skin aging like ultraviolet rays in the UV-B region. However, in recent years, it has been found that the ultraviolet rays in the UV-B region stay relatively on the surface of the skin, while the ultraviolet rays in the UV-A region reach the deep part of the skin, causing skin aging as well as skin cancer. reason. Therefore...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61K8/06A61K8/03A61K8/73A61K8/97A61K8/99A61Q17/04
CPCA61K8/99A61K8/03A61K8/064A61K2800/882A61K8/73A61Q17/04A61K8/06A61K8/9706
Inventor 上田秀人阿部公司那须昭夫
Owner SHISEIDO CO LTD
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