Cosmetics comprising cosmetic compositions impregnated in hydrophobic polymer foam

Abstract

The present disclosure relates to cosmetics including a foam for cosmetic composition impregnation including natural rubber (NR) and hydrophobic polymer as a polymer substrate for making the foam, and a cosmetic composition including an organic ultraviolet (UV) blocking component, that is impregnated in the foam. The present disclosure has a reduction in amount of the organic UV blocking component adsorbed to the impregnation material, and can obtain an excellent UV blocking effect.

Claims

1. A cosmetic comprising: a foam for cosmetic composition impregnation including natural rubber (NR) and a hydrophobic polymer as a polymer substrate for making the foam; and a cosmetic composition including an organic ultraviolet (UV) blocking component, wherein the cosmetic composition is impregnated in the foam, and wherein the polymer substrate for making the foam including the natural rubber (NR) and the hydrophobic polymer comprises between 5 wt % and 20 wt % of the natural rubber per the total weight of the polymer substrate.

2. The cosmetic according to claim 1, wherein the hydrophobic polymer is a polymer or copolymer of at least one selected from the group consisting of styrene, butadiene, chloroprene, acrylonitrile, isoprene, isobutylene, ethylene, and propylene.

3. The cosmetic according to claim 1, wherein the hydrophobic polymer is at least one selected from the group consisting of styrene-butadiene rubber (SBR), butadiene rubber (BR), acrylonitrile-butadiene rubber (NBR), acrylonitrile-butadiene-styrene (ABS), polyethylene (PE), polyvinyl alcohol (PVA), and ethylene vinyl acetate (EVA).

4. The cosmetic according to claim 1, wherein the organic UV blocking component is at least one selected from the group consisting of ethylhexylmethoxycinnamate, ethylhexylsalicylate, octocrylene, isoamyl-P-methoxycinnamate, butylmethoxydibenzoylmethane, homosalate, bis-ethylhexyloxyphenolmethoxyphenyltriazine, ethylhexyltriazone, diethylaminohydroxybenzoylhexylbenzoate, polysilicone-15 and paba(para-aminobenzoic acid), cinoxate, 4-methylbenzylidene camphor, glyceryl para-aminobenzoate, and ethylhexyl dimethyl paba.

5. The cosmetic according to claim 4, wherein the organic UV blocking component is ethylhexyl methoxycinnamate, ethylhexyl salicylate, octocrylene, or mixtures thereof.

6. The cosmetic according to claim 1, wherein the cosmetic composition is in water-in-oil type formulation.

Description

BEST MODE

(1) Hereinafter, the present disclosure will be described in detail through the following embodiments. However, the embodiments according to the present disclosure may be modified in many different forms, and the scope of the present disclosure shall not be construed as being limited to the embodiments mentioned below. The embodiments of the present disclosure are provided for illustration to help a full understanding of the present disclosure.

(2) <Preparation of Water-in-Oil Type Foundation>

(3) Water-in-oil type foundations of composition examples 1, 2 and 3 were prepared as below.

(4) Oil phase components and a thickening agent were put in an oil phase tank and heated to 80° C. to turn into a uniform state, and a pigment was added and dispersed. Water phase components were put in a water phase tank and heated to 80° C. to completely dissolve the raw materials, and then were added to the oil phase tank containing the dispersed pigment, followed by emulsification using a homo mixer to prepare a low viscosity ultraviolet (UV) blocking emulsion. A 40 ml stabilization container was filled with the contents and kept at a 25° C. chamber for one day or longer, and after operation of Brookfield LVII viscometer at 30 rpm for 1 minute using spindle 4, when viscosity was measured at 25° C., the viscosity was in the range of 3,000˜5,000 cps. The following Table 1 is a table showing compositions for producing foundation for impregnation.

(5) TABLE-US-00001 TABLE 1 Name of raw material Composition Composition Composition Classification (wt %) example 1 example 2 example 3 Oil phase Cyclopentasiloxane 30.0  30   30   component Ethylhexylmethoxycinnamate 5.0 — — Ethylhexylsalicylate — 5.0 — Octocrylene — — 5.0 Dimethicone 3.0 3.0 3.0 Caprylic/capric 3.0 3.0 3.0 triglyceride PEG-10 dimethicone 3.0 3.0 3.0 Sorbitan sesquioleate 1.0 1.0 1.0 Disteardimonium Optimum Optimum Optimum hectorite amount amount amount Pigment Titanium dioxide 5.0 5.0 5.0 Mica 3.0 3.0 3.0 Yellow iron oxide 1.0 1.0 1.0 Red iron oxide 0.2 0.2 0.2 Black iron oxide 0.1 0.1 0.1 Water Water to 100 to 100 to 100 phase Dipropylene glycol 5.0 5.0 5.0 Salt 1.0 1.0 1.0

(6) <Determination of Adsorption Ratio of Organic UV Blocking Agent Component for Each Ratio of NR, NBR and SBR>

(7) The foam for each ratio of NR, NBR and SBR was available from S&G (LG-latex #1001-1014), and tailored into a cylindrical shape having a diameter of 50 mm and a height of 10 mm, followed by impregnation with a cosmetic composition. After being kept at room temperature for 24 hours, foundation not impregnated into the sponge surface was removed, and the sponge was squeezed by hands to collect the foundation. The collected foundation solution was retained for the same time and measured by the following method.

(8) 20 mg of each of the foundation before impregnation into the sponge and the foundation collected from the sponge was dissolved in methanol to make 100 ml, which was passed through a 0.45 micrometer filtration membrane, followed by test using an ultraviolet absorption spectrometer according to liquid chromatography to determine a peak area AT of ethylhexylmethoxycinnamate (EHMC), ethylhexylsalicylate (EHS) and octocrylene (OC) and a peak area As of a reference standard, and a changed value before and after impregnation was analyzed.

(9) (1) an amount of ethylhexylmethoxycinnamate (mg)=AT/As×an amount of ethylhexylmethoxycinnamate reference standard (mg)

(10) (2) an amount of ethylhexylsalicylate (mg)=AT/As×an amount of ethylhexylsalicylate reference standard (mg)

(11) (3) octocrylene (mg)=AT/As×an amount of octocrylene (mg)

(12) The results are as shown in Table 2 and Table 3.

(13) The following Table 2 shows a comparison of the degree of adsorption of the organic UV blocking agent for each content of NR and SBR.

(14) TABLE-US-00002 TABLE 2 Example 1 Example 2 Example 3 Composition Composition Composition Cosmetic composition example 1 example 2 example 3 Organic UV blocking agent EHMC EHS OC Before impregnation 5.25 5.13 5.12 NR/SBR (80/20) 2.78 2.58 2.85 NR/SBR (60/40) 3.35 3.32 3.44 NR/SBR (40/60) 4.36 4.30 4.46 NR/SBR (20/80) 4.80 4.51 4.76 NR/SBR (10/90) 4.79 4.54 4.78 NR/SBR (5/95) 4.81 4.60 4.80 NR/SBR (0/100) 4.78 4.63 4.79

(15) As can be seen from the above Table 2, examples 1-3 demonstrated the degree of adsorption of the organic UV blocking component changes depending on the content of NR used for the polymer substrate of the sponge.

(16) Particularly, it was seen that when the NR ratio exceeds 20 wt %, the degree of organic UV adsorption was high.

(17) When NR was absent, the degree of adsorption of the organic UV blocking component was not high, but the impregnation material felt bad and is very susceptible to wear, so it was relatively unsuitable for use of cosmetic composition impregnation as compared to the case where NR was present.

(18) The following Table 3 shows a comparison of the degree of adsorption of the organic UV blocking agent for each content of NR and NBR.

(19) TABLE-US-00003 TABLE 3 Example 4 Example 5 Example 6 Composition Composition Composition Cosmetic composition example 1 example 2 example 3 Organic UV blocking agent EHMC EHS OC Before impregnation 5.25 5.13 5.12 NR/NBR (80/20) 2.71 2.50 2.84 NR/NBR (40/60) 4.20 4.23 4.31 NR/NBR (20/80) 4.86 4.52 4.72 NR/NBR (10/90) 4.88 4.60 4.72

(20) As can be seen from the results of Table 3 above, it was seen that when the NR ratio exceeds 20%, the degree of adsorption of the organic UV blocking agent increases, which renders unsuitable as products.

(21) Similar to the case where SBR is used, in the case where NBR is used, when NR is absent, the degree of adsorption of the organic UV blocking component was not high, but the impregnation material felt bad and is very susceptible to wear, so it was relatively unsuitable for use of cosmetic composition impregnation as compared to the case where NR was present.

(22) The following Table 4 shows a comparison of the degree of adsorption of the organic UV blocking agent for each content of NR and BR.

(23) TABLE-US-00004 TABLE 4 Example 7 Example 8 Example 9 Composition Composition Composition Cosmetic composition example 1 example 2 example 3 Organic UV blocking agent EHMC EHS OC Before impregnation 5.25 5.13 5.12 NR/BR (80/20) 2.65 2.52 2.80 NR/BR (40/60) 4.22 4.25 4.30 NR/BR (20/80) 4.78 4.50 4.68 NR/BR (10/90) 4.80 4.67 4.72

(24) Further, the foundation of composition example 1 was uniformly applied onto the artificial skin (vitroskin) using the NR/SBR (10/90) and NR/NBR (10/90) sponges impregnated therewith and left behind for 10 minutes, and sun protection factor (SPF) values were measured using an SPF measurement device (SPF-2905).

(25) The results are as shown in Table 5.

(26) TABLE-US-00005 TABLE 5 Composition example 1 Cosmetic composition SPF Before impregnation 41 NR/SBR (10/90) 37 NR/NBR (10/90) 38 NR/BR (10/90) 37

(27) As can be seen from the Table 5 above, the impregnation material including less than 20% of NR had an improved degree of adsorption of the UV blocking component, and consequently, a high UV blocking effect of the impregnated cosmetic composition can be expected.

INDUSTRIAL APPLICABILITY

(28) The cosmetics according to the present disclosure provide cosmetics that solved the adsorption problem of the organic ultraviolet (UV) blocking component to the impregnation material, involved in the cosmetics in which the cosmetic composition including the organic UV blocking component is impregnated in the foam.