Cosmetic Composition For Sustaining Luster

Abstract

The present disclosure relates to a gloss-sustainable cosmetic composition, which improves a stuffy feel of use, while including a high-refractive index oil, and provides improved skin gloss sustainability. The water-in-oil type cosmetic composition shows a reduced stuffy feel of use caused by high-refractive index oil, and provides significantly high initial gloss and gloss sustainability.

Claims

1. A water-in-oil type cosmetic composition comprising a high-refractive index oil and a high-refractive index polyol, wherein the high-refractive index polyol is present in an internal phase.

2. The water-in-oil type cosmetic composition according to claim 1, wherein the high-refractive index oil has a refractive index (RI) of 1.39 or more.

3. The water-in-oil type cosmetic composition according to claim 1, wherein the high-refractive index oil comprises at least one selected from the group consisting of phenyl trimethicone, diphenylsiloxyphenyl trimethicone, triethylhexanoin, dipentaerythrityl hexaC5-9 acid ester, diisostearyl maleate, and polyglyceryl-2-triisostearate.

4. The water-in-oil type cosmetic composition according to claim 1, wherein the high-refractive index oil is used in an amount of 1-20 wt % based on the total weight of the composition.

5. The water-in-oil type cosmetic composition according to claim 1, which further comprises an oil phase polymer.

6. The water-in-oil type cosmetic composition according to claim 5, wherein the oil phase polymer is silicone resin, acrylate polymer or a mixture thereof.

7. The water-in-oil type cosmetic composition according to claim 5, wherein the oil phase polymer is present in an amount of 1-15 wt % based on the total weight of the composition.

8. The water-in-oil type cosmetic composition according to claim 1, wherein the high-refractive index polyol has a refractive index (RI) of 1.39 or more.

9. The water-in-oil type cosmetic composition according to claim 1, wherein the high-refractive index polyol comprises at least one selected from the group consisting of glycerin, butylene glycol, dipropylene glycol, polyethylene glycol, 1,3-propanediol, 1,2-hexanediol, and pentylene glycol.

10. The water-in-oil type cosmetic composition according to claim 1, wherein the high-refractive index polyol is used in an amount of 10-20 wt % based on the total weight of the composition.

11. A water-in-oil type cosmetic composition comprising 1-20 wt % of high-refractive index oil and 1-15 wt % of an oil phase polymer, based on the total weight of the composition, and further comprising 10-20 wt % of a high-refractive index polyol in its internal phase.

12. A method for preparing a water-in-oil type cosmetic composition, including the steps of: (S1) agitating and dispersing each of an oil phase ingredient comprising a high-refractive index oil and an aqueous phase ingredient comprising a high-refractive index polyol; (S2) mixing the oil phase ingredient with a colorant and carrying out agitation; and (S3) adding the aqueous phase ingredient to the oil phase ingredient and carrying out emulsification.

Description

DESCRIPTION OF DRAWINGS

[0023] FIG. 1 is a graph illustrating the results of gloss of each of Examples 2 and 3, as determined by using a glossmeter according to Test Example 1.

[0024] FIG. 2 is a graph illustrating the results of gloss of each of Comparative Examples 1, 4 and 5 and Example 1, as determined by using a glossmeter according to Test Example 2.

[0025] FIG. 3 is a graph illustrating the results of gloss of each of Comparative Example 2 and Example 2, as determined by using a glossmeter according to Test Example 2.

[0026] FIG. 4 is a graph illustrating the results of gloss of each of Comparative Example 3 and Example 2, as determined by using a glossmeter according to Test Example 3.

[0027] FIG. 5 is a graph illustrating the results of gloss of each of Comparative Example 2 and Examples 4 and 5, as determined by using a glossmeter according to Test Example 4.

BEST MODE

[0028] Examples will be described more fully hereinafter so that the present disclosure can be understood with ease. The following examples may, however, be embodied in many different forms and should not be construed as limited to the exemplary embodiments set forth therein. Rather, these exemplary embodiments are provided so that the present disclosure will be thorough and complete, and will fully convey the scope of the present disclosure to those skilled in the art.

Preparation of Examples and Comparative Examples

[0029] Water-in-oil type cosmetic compositions were prepared by the following method according to the ingredients and contents (wt %) as shown in the following Table 1.

[0030] <Preparation Method>

[0031] 1) The oil phase ingredients were mixed, warmed to 80° C. and dispersed.

[0032] 2) The product of 1) was mixed with the colorants and agitated.

[0033] 3) In a separate aqueous phase vessel, the aqueous phase ingredients were warmed gradually to 80° C. and dissolved completely.

[0034] 4) The aqueous phase ingredients of 3) were introduced gradually to the oil phase ingredients of 1), and emulsification was carried out by using a homomixer.

[0035] 5) After the completion of the emulsification, the resultant product was degassed and cooled to 28° C.

TABLE-US-00001 TABLE 1 ingredients Comp. Comp. Comp. Comp. Comp. (wt %) Ex. 1 Ex. 2 Ex. 3 Ex. 4 Ex. 5 Ex. 1 Ex. 2 Ex. 3 Ex. 4 Ex. 5 Oil phase Cyclopentasiloxane 15.6 5.85 2.60 15.6 15.6 15.6 5.85 2.60 5.85 9.10 ingredients Cyclohexasiloxane 8.4 3.15 1.40 8.4 8.4 8.4 3.15 1.40 3.15 4.90 Phenyltrimethicone — 8.00 13.00 — — — 8.00 8.00 5.00 2.00 Diphenylsiloxy — 7.00 7.00 — — — 7.00 7.00 3.00 3.00 phenyltrimethicone Trimethylsiloxy — — — — — — — 5.00 5.00 5.00 silicate PEG-10 3.00 3.00 3.00 3.00 3.00 3.00 3.00 3.00 3.00 3.00 dimethicone Disterardimonium 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 hectorite Fragrance 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 Aqueous Purified water Balance Balance Balance Balance Balance Balance Balance Balance Balance Balance phase Glycerin — — — 3.00 8.00 10.00 10.00 10.00 10.00 10.00 ingredients Preservative Q.S. Q.S. Q.S. Q.S. Q.S. Q.S. Q.S. Q.S. Q.S. Q.S. Sodium chloride 0.50 0.50 0.5 0.50 0.50 0.50 0.50 0.50 0.50 0.50 colorants Titanium dioxide 10.00 10.00 10.00 10.00 10.00 10.00 10.00 10.00 10.00 10.00 Yellow iron oxide, 2.00 2.00 2.00 2.00 2.00 2.00 2.00 2.00 2.00 2.00 Red iron oxide, Black iron oxide

Test Example 1: Water-in-Oil Type Makeup Cosmetic Formulation Including Oil Phase Polymer

[0036] To determine the initial gloss and gloss-sustaining effect of a water-in-oil type cosmetic composition including an oil phase polymer which makes a makeup film smooth, Examples and Comparative Examples were tested as follows.

[0037] Each of the water-in-oil type makeup cosmetic compositions according to Examples 2 and 3 was tested in terms of gloss. Determination of gloss was carried out by applying each formulation to a thickness of 60 μm on black paper and using a glossmeter (Glossmeter VG 2000, 85°). Gloss was determined right after the application and after the lapse of 4 hours and 8 hours. In addition, gloss determination was carried out three times for each composition, and the initial gloss and a gloss decrease are shown by using the average values. FIG. 1 shows comparison of GU* values obtained through the glossmeter, and Table 2 shows a calculated decrease in gloss (GU*=gloss unit).

TABLE-US-00002 TABLE 2 Decrease in gloss (%) Example 2 Example 3 4 hours 4.96 4.43 8 hours 10.12 1.85

[0038] As can be seen from the results of FIG. 1 and Table 2, Example 3 using an oil phase polymer shows higher initial gloss as compared to Example 2 including no oil phase polymer. In addition, in terms of a decrease in gloss with the lapse of time, Example 3 shows a significantly lower decrease in gloss with the lapse of time, as compared to Example 2.

Test Example 2: Water-in-Oil Type Makeup Cosmetic Formulation Including Aqueous Phase Polyol

[0039] To determine the initial gloss and gloss-sustaining effect of a water-in-oil type cosmetic composition using a high-refractive index polyol in the aqueous phase, the formulations according to Examples and Comparative Examples of Table 1 were prepared and tested. The results of gloss determination using a glossmeter for the cosmetic compositions including no high-refractive index oil and using a high-refractive index polyol are shown in FIG. 2, and a decrease in gloss for each cosmetic composition is shown in Table 3.

TABLE-US-00003 TABLE 3 Decrease in gloss (%) Comp. Ex. 1 Comp. Ex. 4 Comp. Ex. 5 Example 1 Decrease (4 hr) 48.64 58.66 57.68 42.38 Decrease (8 hr) 68.32 77.68 69.43 55.83

[0040] As can be seen from the results of FIG. 2 and Table 3, the water-in-oil type makeup cosmetic composition including 10% or more of a high-refractive index polyol in its internal phase (Example 1) shows a significantly lower decrease in gloss as compared to the water-in-oil type makeup cosmetic composition including no high-refractive index oil (Comparative Example 1) and the water-in-oil type makeup cosmetic compositions including a polyol in the internal phase in an amount of less than 10 wt % (Comparative Examples 4 and 5). Therefore, it can be seen that the cosmetic composition according to Example 1 realizes excellent gloss sustainability with the lapse of time.

[0041] In addition, the results of determination using a glossmeter for the cosmetic compositions including high-refractive index oil in combination with a high-refractive index polyol are shown in FIG. 3, and a decrease in gloss is shown in Table 4.

TABLE-US-00004 TABLE 4 Comp. Ex. 2 Example 2 Decrease (4 hr) 10.45 4.96 Decrease (8 hr) 13.61 10.12

[0042] As can be seen from the results of FIG. 3 and Table 4, the water-in-oil type makeup cosmetic composition further including a high-refractive index polyol in its internal phase (Example 2) shows a significant increase in gloss-sustaining effect, as compared to the glossy water-in-oil type makeup cosmetic composition including a large amount of high-refractive index oil (Comparative Example 2). Comparative Example 2 shows a decrease in gloss at a higher rate as compared to Example 2, with the lapse of time, and thus Example 2 shows a significantly lower decrease in gloss and has significantly higher gloss sustainability as compared to Comparative Example 2, after 4 hours or 8 hours.

Test Example 3: Water-in-Oil Type Makeup Cosmetic Formulation Including Large Amount of High-Refractive Index Oil

[0043] To determine the gloss sustainability and a stuffy feel of use of makeup when using no high-refractive index polyol and merely including a large amount of high-refractive index oil, the following test was carried out. The feel of use was tested by sensory evaluation. Twenty females in their twenties to thirties participated in the test by evaluating sustainability and stuffy feel. Each test panel was allowed to give a score from 0 to 5, the scores were averaged, and the result is shown as the average value (a higher value shows a better result).

[0044] The results of gloss determination using a glossmeter are shown in FIG. 4, a decrease in gloss is shown in Table 5, and the results of sensory evaluation are shown in Table 6.

TABLE-US-00005 TABLE 5 Comp. Ex. 3 Example 2 Decrease (4 hr) 6.27 4.96 Decrease (8 hr) 16.02 10.12

TABLE-US-00006 TABLE 6 Comp. Ex. 3 Example 2 Sustainability 3.0 3.8 Stuffy feel 2.5 4.0

[0045] As can be seen from the results of FIG. 4 and Table 5, Comparative Example 3 including a larger amount of high-refractive index oil shows a similar level of initial gloss value as compared to Example 2 including an aqueous phase polyol and a smaller amount of high-refractive index oil, but shows a significant decrease in gloss with the lapse of time.

[0046] In addition, as can be seen from the results of evaluation of a feel of use in Table 6, Comparative 3 shows a lower score in terms of sustainability and a stuffy feel as compared to Example 2. It can be seen that the evaluation result of sustainability is similar to the tendency of the result of gloss determination, and a stuffy feel is increased as the content of high-refractive index oil is increased. This suggests that a large amount of high-refractive index oil causes a stuffy feel of use and degradation of sustainability, and the use of a high-refractive index polyol can reduce the content of high-refractive index oil to improve a stuffy feel and to assist maintenance of gloss.

Test Example 4: Water-in-Oil Type Makeup Cosmetic Formulation Depending on Content of High-Refractive Index Oil

[0047] To determine the initial gloss and gloss-sustaining effect depending on the content of high-refractive index oil in a water-in-oil type cosmetic formulation including a high-refractive index polyol and an oil phase polymer, the following test was carried out.

TABLE-US-00007 TABLE 7 Comp. Ex. 2 Example 4 Example 5 Decrease (4 hr) 10.45 4.57 9.54 Decrease (8 hr) 13.61 11.43 14.43

[0048] As can be seen from the results of FIG. 5 and Table 7, Examples 4 and 5 including a high-refractive index polyol and an oil phase polymer and containing a smaller amount of high-refractive index oil shows a higher initial gloss value and a gloss value after the lapse of time, as compared to Comparative Example 2 merely including a larger amount of high-refractive index oil. Example 4 shows a smaller decrease in gloss with the lapse of time, as compared to Comparative Example 2. This suggests that when using high-refractive index oil, a high-refractive index polyol and an oil phase polymer at the same time, gloss sustainability can be improved.

[0049] In addition, Comparative Example 2 and Examples 4 and 5 were evaluated in terms of gloss sustainability and a stuffy feel of use in the same manner as Test Example 3.

TABLE-US-00008 TABLE 8 Comp. Ex. 2 Example 4 Example 5 Sustainability 3.5 3.9 3.5 Stuffy feel 3.7 4.5 4.8

[0050] As can be seen from the results of Table 8, Examples 4 and 5 show a significantly high effect of improving a stuffy feel of use, while providing gloss sustainability equal to or higher than the gloss sustainability of Comparative Example 2.