COSMETIC COMPOSITION FOR UV-SCREENING WITH COOLING EFFECT

Abstract

The present disclosure relates to a cosmetic composition for UV screening in aerosol form, the composition including: an aerosol stock solution containing hydroxyethylcellulose and a UV-screening agent; and an aerosol propellant.

Claims

1. A cosmetic composition for UV screening, the composition comprising: an aerosol stock solution including hydroxyethylcellulose and a UV-screening agent; and an aerosol propellant.

2. The cosmetic composition of claim 1, wherein an amount of the aerosol propellant is about 10 wt % to about 70 wt % with respect to a total weight of the corn position.

3. The cosmetic composition of claim 1, wherein an amount of the hydroxyethylcellulose is about 0.1 wt % to about 1.8 wt % with respect to a total weight of the aerosol stock solution.

4. The cosmetic composition of claim 1, wherein the aerosol propellant is at least one selected from the group consisting of nitrogen, liquefied petroleum gas (LPG), liquefied natural gas (LNG), dimethylether (DME), and tetrafluoropropene (HFO-1234ZE).

5. The cosmetic composition of claim 1, wherein the UV-screening agent is at least one selected from the group consisting of homosalate, ethylhexyl salicylate, phenylbenzimidazole sulfonic acid, octocrylene, ethylhexyl methoxycinnamate, butyl methoxydibenzoylmethane, bis-ethylhexyloxyphenol methoxyphenyl triazine, diethylamine hydroxybenzoyl hexyl benzoate, ethylhexyl triazone, isoamyl p-methoxycinnamate, disodium phenyl dibenzimidazole tetrasulfonate, and 4-methylbenzylidene camphor.

6. The cosmetic composition of claim 1, wherein the composition comprises a water phase layer including the aerosol stock solution and the aerosol propellant, and an oil phase layer separated from the water phase layer, and the composition comprises about 1.0 wt % to about 50 wt % of the oil phase layer with respect to a total weight of the composition.

7. The cosmetic composition of claim 1, wherein, upon spraying, the composition is sprayed in a slush state.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The above and other aspects, features, and advantages of certain embodiments of the disclosure will be more apparent from the following description taken in conjunction with the accompanying drawings, in which:

[0030] FIG. 1 is a photograph showing the appearance of an aerosol formulation according to an embodiment after spraying;

[0031] FIG. 2 illustrates thermal infrared images of the skin before and after application of a cosmetic composition according to an embodiment of Example 7; and

[0032] FIG. 3 illustrates graphs of changes in skin surface temperature according to the application of a cosmetic composition according to an embodiment of Example 7.

DETAILED DESCRIPTION

[0033] Reference will now be made in detail to embodiments, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout. In this regard, the present embodiments may have different forms and should not be construed as being limited to the descriptions set forth herein. Accordingly, the embodiments are merely described below, by referring to the figures, to explain aspects of the present description. As used herein, the term and/or includes any and all combinations of one or more of the associated listed items. Expressions such as at least one of, when preceding a list of elements, modify the entire list of elements and do not modify the individual elements of the list.

Examples 1 to 4 Preparation of Aerosol Stock Solution

[0034] To prepare aerosol stock solutions including hydroxyethylcellulose and a UV-screening agent, aerosol stock solutions of Examples 1 to 4 and Comparative Examples 1 and 2, including the components as shown in Table 1, were prepared according to the content ratios of ingredients shown in Table 2.

TABLE-US-00001 TABLE 1 Comparative Comparative Components Example 1 Example 2 Example 3 Example 4 Example 1 Example 2 Aerosol stock Purified water to 100 to 100 to 100 To 100 to 100 to 100 solution Polyol 10.00 10.00 10.00 10 10.00 10.00 Hydroxyethylcellulose 0.10 0.50 1.00 0.5 2.00 Oil phase 40 40 40 30 40 40 Inorganic 15 UV-screening agent Other additives Appropriate Appropriate Appropriate Appropriate Appropriate Appropriate amount amount amount amount amount amount

[0035] In particular, polyol, hydroxyethylcellulose, and other additives were weighed and homogeneously mixed with purified water in a beaker using an emulsifying mixer at about 3,000 rpm at a temperature of about 75 C. At the same time, a UV-screening agent was weighed in a beaker and dissolved at a temperature of about 75 C. The dissolved UV-screening agent was added into the beaker containing the above mixture and homogeneously mixed at about 3,000 rpm for about 10 minutes. Then, the remaining additives were mixed therewith, cooled, and then degassed.

[0036] As a result, an aerosol stock solution containing purified water, polyol, hydroxyethylcellulose, and oil phase was prepared. The oil phase was prepared so as to contain oil, a component miscible with the oil phase layer, or an organic UV-screening agent. The aerosol stock solution of Example 4 further included an inorganic UV-screening agent.

[0037] In particular, the aerosol stock solutions of Examples 1 to 4 and Comparative Examples 1 and 2 further contained the ingredients as shown in Table 2.

TABLE-US-00002 TABLE 2 Comparative Comparative Ingredients Example 1 Example 2 Example 3 Example 4 Example 1 Example 2 Aerosol Purified water 43.18 42.78 42.28 39.24 41.28 43.28 stock Butylene glycol (polyol) 10.00 10.00 10.00 10.00 10.00 10.00 solution Hydroxyethylcellulose 0.10 0.50 1.00 0.50 2.00 Dibutyl adipate (oil) 3.00 3.00 3.00 3.00 3.00 Methyltrimethiocone (oil) 5.00 5.00 5.00 3.00 5.00 5.00 C12-15alkylbenzoate (oil) 5.00 5.00 5.00 4.00 5.00 5.00 Caprylylmethicone (oil) 2.00 Cyclopentasiloxane (oil) 11.00 bis-ethylhexyloxyphenol 3.00 3.00 3.00 3.00 3.00 methoxyphenyl triazine (UV-screening agent) Ethylhexyl 6.00 6.00 6.00 6.00 6.00 6.00 methoxycinnamate (UV-screening agent) Ethylhexyl salicylate 5.00 5.00 5.00 4.00 5.00 5.00 (UV-screening agent) Butyl 4.00 4.00 4.00 4.00 4.00 methoxydibenzoylmethane (UV-screening agent) Homosalate 6.00 6.00 6.00 6.00 6.00 (UV-screening agent) Octocrylene 3.00 3.00 3.00 3.00 3.00 (UV-screening agent) Phenylbenzimidazole 3.50 3.50 3.50 3.50 3.50 sulfonic acid (UV-screening agent) Titanium dioxide 15.00 (inorganic UV-screening agent) Disodium EDTA (extra 0.02 0.02 0.02 0.02 0.02 0.02 additive) Polymethylsilsesquioxane 2.00 2.00 2.00 2.00 2.00 (extra additive) Sodium chloride (extra 1.00 additive) Neutralizing agent (extra 1.20 1.20 1.20 1.20 1.20 additive) Coloring agent (extra 4.24 additive)

Examples 5 to 10. Preparation of Cosmetic Composition in Aerosol Formulation

[0038] To prepare cosmetic compositions for UV screening in aerosol formulation, the aerosol stock solutions of Examples 1 to 4 and Comparative Examples 1 and 2 were each used to prepare a two-layered phase liquid, which was then filled into a pressure-resistant container in an optimal ratio to thereby prepare the aerosol cosmetic composition.

[0039] In particular, the cosmetic compositions of Examples 5 to 10 and Comparative Examples 3 to 6 were prepared according to the amounts of the aerosol stock solution and the types and amounts of an aerosol propellant as shown in Table 3.

TABLE-US-00003 TABLE 3 Example Example Example Example Example Example Comparative Comparative Comparative Comparative Ingredient Example 5 6 7 8 9 10 Example 3 Example 4 Example 5 Example 6 Aerosol Example 1 80.00 20.00 stock Example 2 80.00 60.00 95.00 solution Example 3 70.00 40.00 content Example 4 60.00 Comparative 70.00 Example 1 Comparative 60.00 Example 2 Propellant Liquefied 20.00 40.00 30.00 40.00 5.00 80.00 30.00 content petroleum gas Dimethyl ether 20.00 60.00 40.00

Experimental Example 1. Evaluation of Cosmetic Composition in Terms of Aerosol Formulation Formation, Cooling Sensation, and Feeling

[0040] Visual evaluation and evaluation of feeling were performed on the cosmetic compositions of Examples 5 to 10 and Comparative Examples 3 to 6.

[0041] In particular, the formation of the aerosol formulation was determined through visual evaluation. The cooling effect was evaluated through an in-house efficacy test by measuring the temperature of the skin over time after application of each cosmetic composition. In the evaluation of feeling; a panel of nine individuals aged between 25 and 35 were asked to evaluate the novelty of feeling on a 10-point scale (10 being the highest).

[0042] The results are shown in Table 4. The appearance of the cosmetic formulation of Example 7 after spraying is shown in FIG. 1.

TABLE-US-00004 TABLE 4 Example Example Example Example Example Example Comparative Comparative Comparative Comparative Item 5 6 7 8 9 10 Example 3 Example 4 Example 5 Example 6 Evaluation Formulation O O O C O C X O X X results formation Cooling Yes Yes Yes Yes Yes Yes Slight Yes Slight Slight sensation Novelty of 7.89 8.00 9.22 9.00 8.56 8.67 5.11 feeling

[0043] As shown in Table 4, the cosmetic composition of Comparative Example 3 having an aerosol propellant content of less than 10 wt % failed to form an aerosol formulation, and the cosmetic composition of Comparative Example 4 having an aerosol propellant content of greater than 74 wt % blew away easily such that usability was poor. The cosmetic composition of Comparative Example 5 including no hydroxyethylcellulose failed to form an aerosol formulation, even though it contained an appropriate amount of aerosol propellant. The cosmetic composition of Comparative Example 6 including excess hydroxyethylcellulose also failed to form an aerosol formulation.

[0044] However, the cosmetic composition of Example 7 was found to form an aerosol formulation, due to the inclusion of hydroxyethylcellulose in the aerosol stock solution, even though it contained the aerosol propellant in the same ratio as in the cosmetic composition of Comparative Example 5, and was also found to exhibit a strong cooling sensation and a highly novel feeling.

[0045] That is, even if the aerosol stock solution contains an oil phase, specifically, a high content of oil, it was found to be possible to form an aerosol formulation and impart a cooling sensation and an improved feeling when the aerosol stock solution includes hydroxyethylcellulose.

[0046] The cosmetic compositions of Examples 5 to 10 were also found to be sprayed in a slush state as shown in FIG. 1.

Experimental Example 2 Sensory Test of Cosmetic Composition

[0047] A sensory test was performed on the cosmetic compositions in aerosol formulation according to Examples 5 to 10 and Comparative Example 3. In particular, in the sensory test, nine panelists aged between 25 and 35 were asked to evaluate novelty of feeling on a 10-point scale (10 being the highest).

[0048] The results are shown in Table 5.

TABLE-US-00005 TABLE 5 Comparative Example 5 Example 6 Example 7 Example 8 Example 9 Example 10 Example 3 Evaluator A 8 8 9 9 9 9 6 Evaluator B 8 8 10 9 9 9 6 Evaluator C 7 8 9 7 8 8 4 Evaluator D 7 9 9 9 9 9 6 Evaluator E 9 8 10 10 9 10 6 Evaluator F 8 8 9 9 8 8 5 Evaluator G 9 7 9 10 8 8 5 Evaluator H 8 9 10 10 9 9 6 Evaluator I 7 7 8 8 8 8 2

[0049] As represented in Table 5, most of the evaluators evaluated, though with slight individual differences, that improved feeling was felt with the cosmetic compositions of Examples 5 to 10 prepared using one of the aerosol stock solutions of Examples 1 to 4. In particular, the cosmetic compositions of Examples 7 to 10 containing about 40 wt % to about 60 wt % of the aerosol propellant were scored high points in the evaluation test. However, the cosmetic composition of Comparative Example 3 using the aerosol stock solution of Example 2 but having an aerosol propellant content of 5 wt % failed to form a desired aerosol formulation, and was evaluated not to exhibit improved feeling.

Experimental Example 3 Confirmation of Skin Surface Temperature Reduction Effect According to Application of Cosmetic Composition

[0050] The cosmetic composition of Example 7 was applied to the skin to confirm a skin surface temperature reduction effect. In particular, a non-application area and application area for the cosmetic composition were set on the arms of a panel of five individuals. Thermal infrared images were captured before and after the application of the cosmetic composition and compared. In the thermal infrared images, purple, red, and black areas are observed, wherein, the closer to purple, the lower the temperature.

[0051] As a result, as shown in FIG. 2, a visual difference between the application area and the non-application area was not observed before the application of the cosmetic composition. However, after the application of the cosmetic composition, a significant effect of skin temperature reduction in the application area was even visually confirmed.

[0052] The average skin surface temperature before and after the application of the cosmetic composition was also measured. The average skin surface temperature before the application of the cosmetic composition was 26.3 C., and a surface temperature reduction rate was also identified based on this temperature.

[0053] As a result, as shown in FIG. 3, when the cosmetic composition was not applied, the rate of change in skin surface temperature was insignificant. Rather, the skin surface temperature increased due to environmental impacts. Unlike this, when the cosmetic composition of Example 7 was applied, the average skin surface temperature was found to be reduced from 26.3 C. to 24.0 C., with a skin surface temperature rate of about 8.7%.

[0054] From the above results, it was confirmed that the cosmetic composition for UV screening may impart improved cooling sensation, due to the inclusion of hydroxyethylcellulose, better than a cooling sensation merely by the gas of an aerosol formulation

[0055] It was also found that a desired aerosol formulation is not formed when the aerosol propellant content is less than 10 wt %, there are concerns about frostbite and blowing away of the contents resulting in poor feeling, due to too strong spraying pressure, when the aerosol propellant content is greater than 70 wt %, and improved cooling sensation and feeling result in when the aerosol propellant content is about 10 wt % to about 70 wt %.

[0056] As described above, according to the one or more embodiments, a cosmetic composition for UV screening in aerosol formulation may impart, by using an aerosol propellant having a low melting point and hydroxyethylcellulose, a cooling sensation and a novel feeling when being sprayed.

[0057] It should be understood that embodiments described herein should be considered in a descriptive sense only and not for purposes of limitation, Descriptions of features or aspects within each embodiment should typically be considered as available for other similar features or aspects in other embodiments. While one or more embodiments have been described with reference to the figures, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the disclosure as defined by the following claims.