WATER-IN-OIL MAKEUP COSMETIC COMPOSITION HAVING WATER RESISTANCE AND CLEANSING PROPERTIES

Abstract

The present disclosure provides a water-in-oil makeup cosmetic composition containing isostearic acid, a pigment-grade powder (specifically, a pigment-grade powder coated with a lipoamino acid), an emulsifier having an HLB greater than 0 and lower than or equal to 8, and a residual amount of water, the composition having superior water resistance and cleansing properties at the same time. The water-in-oil makeup cosmetic composition of the present disclosure can be usefully used because it has superior water resistance in environments with below-neutral pH, such as tap water, sweat, etc. and is converted to have superior cleansing properties when the skin is washed with alkaline water such as soapy water.

Claims

1-9. (canceled)

10. A water-in-oil makeup cosmetic composition comprising isostearic acid, a pigment-grade powder, and an emulsifier having an HLB greater than 0 and lower than or equal to 8, wherein the pigment-grade powder is a pigment-grade powder coated with a lipoamino acid, and wherein the composition is washed off better with an alkaline pH aqueous solution than with a neutral pH aqueous solution.

11. The makeup cosmetic composition according to claim 10, wherein the isostearic acid is comprised in an amount of 1-40 wt % based on the total weight of the composition, and the pigment-grade powder is comprised in an amount of 1-40 wt % based on the total weight of the composition.

12. The makeup cosmetic composition according to claim 10, wherein the lipoamino acid is palmitoyl proline, magnesium palmitoyl glutamate, sodium palmitoyl sarcosinate, or a mixture thereof.

13. The makeup cosmetic composition according to claim 10, wherein the pigment-grade powder is TiO.sub.2 coated with a lipoamino acid.

14. The makeup cosmetic composition according to claim 10, wherein the pigment-grade powder has a powder size of 200-1000 nm.

15. The makeup cosmetic composition according to claim 10, wherein the composition further comprises a monovalent ionic salt.

16. The makeup cosmetic composition according to claim 15, wherein the monovalent ionic salt is sodium chloride.

17. The makeup cosmetic composition according to claim 10, wherein the composition comprises 5 wt % or less of ZnO based on the total weight of the composition.

Description

DESCRIPTION OF DRAWINGS

[0041] FIG. 1 compares the effect of a composition according to the present disclosure and a conventional composition.

[0042] FIG. 2 shows a result of evaluating the water resistance of compositions #1 to #5, and

[0043] FIG. 3 shows a result of evaluating the easiness of cleansing of the compositions #1 to #5.

[0044] FIG. 4 shows a result of evaluating the water resistance of compositions #11 to #15, and

[0045] FIG. 5 shows a result of evaluating the easiness of cleansing of the compositions #11 to #15.

[0046] FIG. 6 shows a result of evaluating the water resistance of compositions #6 to #10, and

[0047] FIG. 7 shows a result of evaluating the easiness of cleansing of the compositions #6 to #10.

[0048] FIG. 8 shows a result of evaluating the water resistance of compositions #16 to #20, and

[0049] FIG. 9 shows a result of evaluating the easiness of cleansing of the compositions #16 to #20.

BEST MODE

[0050] Hereinafter, the present disclosure will be described in detail through examples, etc. to help understanding. However, the examples of the present disclosure may be modified in various different forms, and the scope of the present disclosure should not be construed as being limited to the following examples. The examples of the present disclosure are provided to more completely explain the present disclosure to those having ordinary knowledge in the art.

Experiment 1. Variation of Fatty Acid Contents

[0051] Makeup products for skin tone correction with the formulas and contents described in Table 1 were prepared as follows.

[0052] The components described in A were weighed according to the contents and dissolved completely by heating to 70-80? C. The components described in B were dispersed completely and heated to 70-80? C. A was slowly added to B while emulsifying for 5 minutes, and the prepared emulsion was cooled to 30? C.

[0053] In Table 1, the pigment X was a mixture of a titanium dioxide powder (LP-TR 10, Miyoshi) coated with a mixture of aluminum hydroxide, lipoamino acid and palmitic acid; red iron oxide (OTS Red R-516, Daito Kasei Kogyo); yellow iron oxide (OTS-2 Yellow LLXILO, Daito Kasei Kogyo); and black iron oxide (OTS-2 lack BL-100, Daito Kasei Kogyo). The weight ratio of the mixture was 93.482:1.080:5.400:0.038 (coated TiO.sub.2:red iron oxide:yellow iron oxide:black iron oxide). The lipoamino acid was a mixture of palmitoyl proline, magnesium palmitoyl glutamate and sodium palmitoyl sarcosinate, and the coated titanium dioxide powder had a mode value of 357 nm and a median (D.sub.50) value of 434 nm according to the data provided by the manufacturer. The prepared composition was dispersed in ethanol and analyzed using a laser particle size analyzer.

TABLE-US-00001 TABLE 1 (Unit: wt % ) #1 #2 #3 #4 #5 A Water 28 28 28 28 28 Sodium chloride 2 2 2 2 2 Glycerin 10 10 10 10 10 B Cyclopentasiloxane 20 20 20 20 20 Phenyl trimethicone 5 5 5 5 5 Cetyl ethylhexanoate 15 14 11 7 0 Isostearic acid 0 1 4 8 15 Ethylhexyl methoxycinnamate 5 5 5 5 5 PEG 10 dimethicone 5 5 5 5 5 Pigment X 10 10 10 10 10 Total 100 100 100 100 100

[0054] Water resistance was evaluated by the following method.

[0055] 25 mg of the cosmetic composition was applied onto a black rubber plate. Tap water run over the area where the composition was applied for 15 seconds or longer, and the degree of washing off was checked. The result is shown in FIG. 1.

[0056] Easiness of cleansing was evaluated by the following method.

[0057] 25 mg of the cosmetic composition was applied onto a black rubber plate. After dropping 4-5 drops of diluted 20% cleansing foam thereon and rubbing sufficiently, it was rinsed with running water and the degree of washing off was compared. As the cleansing foam, commercially available Lacvert BRI:D cleansing foam was used. The pH of the diluted 20% cleansing foam was 9.5. The result is shown in FIG. 2.

[0058] As shown in FIG. 1, all the compositions of the present disclosure showed superior water resistance, without being washed off by tap water. That is to say, the water resistance of the W/O compositions did not decrease even when the fatty acids were contained.

[0059] In contrast, as shown in the result of the evaluation of easiness of cleansing in FIG. 2, the makeup cosmetic products containing 1 wt % or more of fatty acids were washed off better. It is though that the fatty acid helps in cleansing through saponification under the high pH condition such as soapy water. However, the present disclosure is not limited to the theoretical mechanism.

Experiment 2. Variation of Fatty Acids

[0060] Makeup cosmetic products were prepared in the same manner as in Experiment 1, and water resistance and easiness of cleansing were evaluated.

TABLE-US-00002 TABLE 2 (Unit: wt %) #11 #12 #13 #14 #15 A Water 28 28 28 28 28 Sodium chloride 2 2 2 2 2 Glycerin 10 10 10 10 10 B Cyclopentasiloxane 20 20 20 20 20 Phenyl trimethicone 5 5 5 5 5 Cetyl ethylhexanoate 5 5 5 5 5 Myristic acid 10 Palmitic acid 10 Stearic acid 10 Isostearic acid 10 Behenic acid 10 Ethylhexyl methoxycinnamate 5 5 5 5 5 PEG 10 dimethicone 5 5 5 5 5 Pigment X 10 10 10 10 10 Total 100 100 100 100 100

[0061] Water resistance was evaluated in the same manner as in Experiment 1 and the result is shown in FIG. 3. Easiness of cleansing was evaluated in the same manner as in Experiment 1 and the result is shown in FIG. 4.

[0062] As a result of the experiment, all the compositions showed superior water resistance regardless of the fatty acids. In contrast, for the easiness of cleansing, the effect of isostearic acid (#14) was remarkably superior as compared to other solid fatty acids.

Experiment 3. Variation of Pigment-Grade Powders

[0063] Makeup cosmetic products were prepared in the same manner as in Experiment 1, and water resistance and easiness of cleansing were evaluated.

[0064] The pigment X in Table 3 was the same as that described in Table 1.

[0065] In Table 3, the pigment Y was a mixture of a titanium dioxide powder (SiTiO.sub.2 CR50, Korea Fuji Chemical Engineering) coated with aluminum hydroxide and dimethicone; red iron oxide; black iron oxide; and yellow iron oxide. The mixing ratio was 93.482:1.080:5.4:0.038. The powder size was 250 nm. For reference, SiTiO.sub.2 CR50 is a powder obtained by coating TiO.sub.2 CR50 with silicon. CR50 is the most common pigment-grade powder with a particle size of 250 nm.

TABLE-US-00003 TABLE 3 (Unit: wt %) #6 #7 #8 #9 #10 A Water 28 28 28 28 28 Sodium chloride 2 2 2 2 2 Glycerin 10 10 10 10 10 B Cyclopentasiloxane 20 20 20 20 20 Phenyl trimethicone 5 5 5 5 5 Cetyl ethylhexanoate 7 7 7 7 7 Isostearic acid 8 8 8 8 8 Ethylhexyl methoxycinnamate 5 5 5 5 5 PEG 10 dimethicone 5 5 5 5 5 Pigment X 8 6 4 2 Pigment Y 2 4 6 8 10 Total 100 100 100 100 100

[0066] Water resistance was evaluated in the same manner as in Experiment 1 and the result is shown in FIG. 6. Easiness of cleansing was evaluated in the same manner as in Experiment 1 and the result is shown in FIG. 7.

[0067] As a result of the experiment, all the compositions showed superior water resistance regardless of the pigments. In contrast, the easiness of cleansing was improved further when the lipoamino acid-coated powder was contained (e.g., 5 wt % or higher; for the sample #8, 6 wt % of the pigment X was used and the content of the lipoamino acid-coated powder in the pigment X was approximately 93.4%).

Experiment 4. Effect of Divalent Ionic Salts

[0068] Makeup cosmetic products were prepared in the same manner as in Experiment 1, and water resistance, easiness of cleansing and stability were evaluated.

TABLE-US-00004 TABLE 4 (Unit: wt %) #16 #17 #18 #19 #20 A Water 38.1 36.1 37.6 36.1 36.1 Butylene glycol 10 10 10 10 10 Magnesium sulfate 2 Sodium chloride 0.5 2 2 B Cyclopentasiloxane 4 4 4 4 4 Isododecane 8 8 8 8 8 Isostearic acid 5 5 5 5 5 Ethylhexyl methoxycinnamate 7 7 7 7 7 Isoamyl p-methoxycinnamate 7 7 7 7 7 Bis-ethylhexyloxyphenol 1 1 1 1 1 methoxyphenyl triazine Diethylamino hydroxybenzoyl 4 4 4 4 4 hexyl benzoate Sorbitan olivate 4 4 4 4 4 PEG-30 dipolyhydroxystearate 0.3 0.3 0.3 0.3 0.3 Cetyl PEG/PPG-10/1 0.1 0.1 0.1 0.1 0.1 dimethicone Disteardimonium hectorite 1.5 1.5 1.5 1.5 1.5 Zinc oxide 3 3 3 3 Pigment X 7 7 7 7 7 Total 100 100 100 100 100

[0069] Water resistance was evaluated in the same manner as in Experiment 1 and the result is shown in FIG. 7. Easiness of cleansing was evaluated in the same manner as in Experiment 1 and the result is shown in FIG. 8.

[0070] In addition, stability was also evaluated and the result is shown in Table 5.

TABLE-US-00005 TABLE 5 #16 #17 #18 #19 #20 Salt None MgSO.sub.4 2 NaCl 0.5 NaCl 2 NaCl 2 wt % wt % wt % wt % ZnO 3 wt % 3 wt % 3 wt % 3 wt % None Easiness of ? ? ? ? ? cleansing Stability X ? ? ? ?

[0071] (In Table 5, O indicates superior stability, A indicates intermediate stability, and X indicates poor stability.)

[0072] As a result of the experiment, all the compositions #16 to #20 showed superior water resistance and easiness of cleansing. In particular, in terms of the easiness of cleansing, the composition #20 containing no divalent ionic salt at all showed the most superior effect better than the compositions #16 to #19 containing divalent ionic salts.

[0073] More specifically, as a result of the experiment on the compositions #16 to #20, it was found out that the compositions #16 to #19 containing divalent ionic salts showed slightly decreased cleansing power. The samples containing divalent ionic salts could be removed only when rubbed for a long time with the 20% cleansing foam solution and they remained slightly even after the cleansing. In contrast, the sample #20 could be removed easily and completely and also exhibited superior stability.