KR20130055330A - Cosmetic composition for sunscreening gel comprising beads containing uv abosorbants or sunscreen - Google Patents

Abstract

PURPOSE: An oil-in-water cosmetic material for UV protection is provided to ensure freshness and lightness, and to block UV protection with waterproof property. CONSTITUTION: A cosmetic composition for UV protection contains a bead containing a UV absorber or a blocking agent. The composition also contains a high carbon number alcohol and fatty acid in a ratio of 4.5:1-5.5:1. The composition contains 1.0-5.0 wt% of the high carbon number alcohol and fatty acid and 1-5 wt% of the bead. The high carbon number alcohol is selected from a group consisting of benehyl alcohol, cetearyl alcohol, cetyl alcohol, and stearyl alcohol. The fatty acid is selected from a group consisting of stearic acid, benehic acid, and palmitic acid. The composition is a gel type.

Description

Cosmetic composition for gel type sunscreen containing beads containing a UV absorber or a blocking agent {UV smetic composition for sunscreening gel containing beads containing UV abosorbants or sunscreen}

The present invention relates to a cosmetic composition for sunscreen, and more particularly, a water-type sunscreen that realizes a gel type appearance and fresh feeling by containing beads containing a high content of an ultraviolet absorber or a blocker using a higher alcohol and a fatty acid. It relates to a cosmetic composition for.

Consumers' awareness of the need for UV protection in everyday life is increasing not only in the summer, sports and leisure activities, but also as Korea changes to a subtropical climate due to the recent global climate change, consumers feel refreshing and light. The demand for advanced products is increasing. Among the types of cosmetics, light and fresh formulations include gels, sprays, and skins.However, due to the characteristics of the light formulations, it is difficult to maintain a formulation and include a sufficient amount of a UV absorber or a blocking agent. Due to the tendency to feel heavy, it was difficult to implement a preemptive type of light feeling. There are several types of gel-type products on the market, and they have a fresh and light feeling, but the actual UV protection index measurement shows that all products fall short of the indicated index.

[Patent Literature]

Republic of Korea Patent No. 10-0563583

Accordingly, the present inventors have tried to develop a formulation that can sufficiently contain a UV absorber and a sunscreen while having a light and light feeling. As a result, the beads can contain high content of a UV absorber or a blocker using a higher alcohol and a fatty acid without a surfactant. The present invention was completed by discovering that it can be realized at the same time by forming in the water phase, using a fresh feeling, high UV protection index, and water resistance.

Accordingly, it is an object of the present invention to provide a gel-type sunscreen oil-in-water cosmetic composition of the gel type that can realize a fresh feeling and improved sunscreen effect, water resistance at the same time.

In order to achieve the above object, the present invention provides a water-in-oil type sunscreen cosmetic composition formed by using a higher alcohol and fatty acid in the form of a bead in the ultraviolet absorber or block in the water phase.

Oil-in-water type sunscreen cosmetics according to the present invention by stabilizing the water-soluble sunscreen or a high polarity sunscreen or absorbent in the form of beads in the form of a bead without a surfactant, by the prior art to simultaneously realize a high content of sunscreen and a fresh feeling By solving the difficult problem, it was possible to simultaneously realize a refreshing and light feeling and the UV protection index with a much improved level compared to the existing one. In addition, it is possible to secure water resistance, which was difficult to show in most oil-in-water type sunscreens. In addition, by forming an oily beads of visible size in the water phase in the formulation, it has the effect of obtaining a gel type formulation with a unique appearance that is different from the existing products.

The present invention provides an oil-in-water type sunscreen cosmetic composition in which a sunscreen or an absorbent is formed in an aqueous phase using a higher alcohol and a fatty acid in the form of beads.

Hereinafter, the present invention will be described in more detail.

The higher alcohol used in the present invention may be selected from alcohols having 12 to 26 carbon atoms, it is preferable to use a mixture of two or more different carbon atoms. More specifically, the higher alcohol may be used at least one selected from the group consisting of behenyl alcohol, cetearyl alcohol, cetyl alcohol and stearyl alcohol, preferably 1 selected from behenyl alcohol and cetearyl alcohol. More than one species can be used.

The fatty acid used in the present invention may be selected from components that are solid at room temperature, preferably fatty acids having a melting point of 40 ° C. or higher and 80 ° C. or lower, and more specifically, stearic acid, behenic acid, and palmi One or more selected from the group consisting of tick acids can be used.

The higher alcohols and fatty acids are components having a high melting point and amphiphilic structural properties having both a lipophilic portion and a hydrophilic portion. Therefore, it is located at the interface between lipophilic components including UV absorber and blocking agent and water phase at high temperature, and turns into solid state at the temperature below melting point to prevent aggregation and coalescence of lipophilic components without other surfactant components. It allows the lipophilic components to remain dispersed in the aqueous phase in the form of beads. In addition, when the cosmetic applied with this technology is applied on the skin, the high melting point lipophilic components form a lipid component film on the skin to prevent the sunscreen or the absorbent from being washed away in water or sweat so that it has water resistance.

The ratio of the higher alcohol and fatty acid is characterized in that 4.5: 1 to 5.5: 1 is contained in order to stably form the lipophilic mixture beads, and preferably may be contained in a ratio of 5: 1. Also, higher alcohols can be mixed with two or more carbon atoms.

In the present invention, the total content of the mixture of the higher alcohol and the fatty acid is 1.0 to 5.0% by weight based on the total weight of the composition is effective to form the lipophilic mixture beads, preferably comprises 2.0 to 3.0% by weight. If the content of the mixture is less than 1.0% by weight, the content of higher alcohols and fatty acids which may be located at the interface may not be sufficient to form beads. If the content is more than 5.0% by weight, the content of the solid component is too high to provide a fresh and light feeling. Not suitable for betting

The size of the lipophilic mixture beads in the formulation can be prepared in various sizes and is preferably characterized in that the diameter is 0.1mm to 5mm. It is difficult to prevent aggregation and coalescence of oil-soluble components when the diameter is less than 0.1 mm, and it is difficult to differentiate them in terms of usability and appearance when compared to general underwater type sunscreens. If the diameter is 5mm or more, it is not suitable for application as a cosmetic because it is not smooth and uniform application due to too large particle size.

The ultraviolet absorber used in the present invention may be used a UV absorber commonly used in the art, more specifically octyl methoxycinnamate (isotyl methoxycinnamate) and isoamyl-p-methoxycinnamate (isoamyl-p cinnamate derivatives such as -methoxycinnamate; Salicylic acid derivatives such as butylmethoxy dibenzoylmethane, bisethylhexyloxylphenolmethoxy phenyl triazine and octyl salicylate; PABA (paminobenzoic acid) derivatives; Benzophenones; At least one selected from the group consisting of anthranilates may be used.

The UV absorber may contain 5 to 50% by weight based on the total weight of the composition, when containing less than 5% by weight, it is difficult to expect the sunscreen effect, when containing more than 50% by weight difficult to form beads and fresh It is hard to show usability. More preferably, the ultraviolet absorber may contain 10 to 30% by weight.

In addition to the ultraviolet absorber may be used with a sunscreen commonly used in the art. Generally, there are powders such as ZnO (zinc oxide), TiO ₂ (titanium dioxide), silicates and talc, and the content of the sunscreen is preferably used in a formulation of less than 5%, and should not exceed 10%. . If it is more than 10%, it is difficult to formulate and the whitening phenomenon becomes severe when used.

It is also possible to use a mixture of one or more ultraviolet absorbers and blockers in the formulation, and most cosmetic oil components are also applicable at the same time. In the cosmetic composition according to the present invention, the ultraviolet absorber and the blocker content is preferably 10.0 to 40.0% by weight based on the total weight of the composition.

Method for producing a bead containing a UV absorber or a blocker including the above components, by dissolving the above-mentioned higher alcohol and fatty acid, ultraviolet absorber, and other lipid components in a separate container by heating and dissolving at 70 ~ 80 ℃ in a homogenizer Prepare a lipophilic mixture. After dissolving the water phase part to 65-75 ° C., the lipophilic mixture is slowly added to the water phase part to form particles of the lipophilic mixture through a homogenizer at 65-75 ° C., and then cooled to room temperature using a cooler. Through this process it is possible to obtain a sunscreen cosmetic composition containing the lipophilic mixture beads containing the ultraviolet absorbent according to the present invention.

The cosmetic composition provided in the present invention may include an aqueous thickener. Inclusion of water-based thickeners can help to prevent coalescence and aggregation of lipophilic mixture beads to improve formulation stability.

In addition to the cosmetic composition according to the present invention can be used by adjusting the water-soluble moisturizer, water dispersion thickener, and the like commonly used as a cosmetic to suit the purpose and use of each product.

In the present invention, by dispersing and stabilizing a UV absorber or a blocker in the form of beads in a water phase without using a surfactant and a higher alcohol, fatty acid containing a high content of a UV absorber and a blocker while at the same time fresh cosmetics differentiating the cosmetic composition for sunscreen to provide. In addition, the lipophilic bead particles formed in the present invention is characterized in that the foreign body does not feel when applied on the skin by not using an insoluble component unlike the general capsule. In addition, after the application, higher alcohols and fatty acids form a lipid film on the surface of the skin, so that the sunscreen or absorbent may have water resistance that is not easily washed off by water or sweat.

Hereinafter, the present invention will be described in more detail with reference to Examples and Comparative Examples, but the scope of the present invention is not necessarily limited to these examples.

[ Manufacturing example  1] Preparation of Sunscreen Composition

In the following Table 1, Examples 1 and Comparative Examples 1-2 of the oil-in-water emulsion sunscreen formulations were prepared (unit: wt%).

According to the above technique, the ratio of the higher alcohol and the fatty acid was 5: 1, and the total weight was 2.0%, and it was designed not to use the surfactant while including 22% of the sunscreen and the absorbent.

Comparative Example 1 was designed as a general oil-in-water emulsion containing the same amount of sunscreen and surfactant as in Example, and Comparative Example 2 contained a similar amount of sunscreen and surfactant than Example 1, thereby providing a level similar to that of Example 1. The light and refreshing feeling of the. Comparative Example 3 was designed to use the same amount of high melting wax other than the wax proposed in this technique, and to include the same amount of sunscreen as Example 1 but no surfactant.

Example 1 is a ratio of the higher alcohol and fatty acids of the present invention to 5: 1, to include a total weight of 2.0%, it was designed not to contain a surfactant.

ingredient Example 1 Comparative Example 1 Comparative Example
2 Comparative Example
3 Oily ingredients Behenyl alcohol 0.8 0 0 0 Cetearyl alcohol 0.2 0.5 0 0 Stearic acid 0.2 0.5 0 0 Microcrystalline Wax 0 0 0 0.8 Beads wax 0 0 0 0.4 Octylmethoxy cinnamate 7 7 5 7 Octyl salicylate 5 5 0 5 Bisethylhexyloxyphenol methoxyphenyltriazine 6 6 0 6 TiO ₂ 4 4 One 4 FAGE -100 stearate 0 One 0.5 0 Polyglyceryl-3
Methylglucose distearate 0 One 0.5 0 Aqueous component Purified water To 100 To 100 To 100 To 100 EDTA-2Na 0.02 0.02 0.02 0.02 glycerin 5 5 5 5 Phenoxyethanol 0.3 0.3 0.3 0.3 Carbomer 0.2 0.2 0.2 0.2 Other ingredients corrector Suitable amount Suitable amount Suitable amount Suitable amount

<The manufacturing method of Example 1 and Comparative Examples 1-4>

The oil component of Table 1 was uniformly dissolved and mixed by heating to 75 ° C., and the aqueous component was uniformly dissolved and mixed by heating to 70 ° C., and the oil component mixture was added to the aqueous component mixture under stirring to obtain beads. Formed. Thereafter, the emulsion of the aqueous component and the oil component was stirred, and a neutralizer was added thereto.

[ Test Example  1] Long-term stability assessment

In order to evaluate the high temperature stability and long term stability of the composition according to the present invention, the compositions of Example 1 and Comparative Examples 1 to 3 of Preparation Example 1 were each placed in a 100 ml transparent plastic bottle container at 25 ° C. and 45 ° C., respectively. After 4 weeks, the composition was observed after 1 week and 4 weeks, and the results of evaluating formulation stability are shown in Table 2 below.

Example 1 Comparative Example 1 Comparative Example 2 Comparative Example 3 25 ℃ (1 week) O O O X 25 ℃ (4 weeks) O O O X 45 ℃ (1 week) O O O X 45 degrees Celsius (4 weeks) O △ O X

O: There was no separation between oil and water.

(Triangle | delta): The oil phase and the water phase were isolate | separated slightly.

x: The paid and prime has been clearly separated.

As shown in the results of Table 2, in the case of the oil-in-water composition including the sunscreen and the absorbent, high melting point waxes other than the waxes proposed in the above techniques were difficult to secure a formulation without a surfactant. This is because the proposed higher alcohols and fatty acids can be located at the interface between the oil phase and the water phase due to the amphiphilic nature of the hydrophilic and lipophilic moieties. It can be seen that it was easy.

In addition, even when the surfactant is included, as the content of the sunscreen or absorbent increases, it is difficult to obtain stability of the formulation, and as the content of the surfactant increases, the feeling of use changes in a heavy direction. It may not be the preferred direction to achieve long term stability at the same time.

[ Test Example  2] sensory evaluation

The compositions of Example 1 and Comparative Examples 1 and 2 were evaluated for lightness, moisture, and ease of use when viewed in the presence or absence of beads and on the skin as a cosmetic composition for sun protection. In the case of Comparative Example 3 was not good stability even at room temperature, the formulation was separated and excluded from the sensory evaluation.

The evaluation was made to judge the difference in the feeling of use after application to the 10 people who participated in the cosmetics industry for more than three years research and development on a 10-point scale, the average of the results are shown in Table 2 below. Higher scores indicate better lightness, moisture, and ease of use.

Evaluation items Example 1 Comparative Example 1 Comparative Example 2 Bead presence U radish radish lightness 9.5 7.2 8.9      Moisture 9.6 7.4 7.6 Feeling preference 9.3 7.1 8.4

In the results of Table 3, beads were formed only in Example 1 according to the present invention, it was found that the preference is higher in all three items than Comparative Examples 1-2. In the case of Comparative Example 1 containing a surfactant, it was confirmed that it was difficult to exhibit a light and high moisture feeling while including the same amount of sunscreen as Example 1, in the case of Comparative Example 2 including less sunscreen than Example 1 Although the surfactant was included, a high score in terms of lightness, moisture, and preference was obtained, but lower than that in Example 1.

[ Test Example  3] UV cut index measurement

In order to measure the UV blocking index of Example 1 and Comparative Examples 1 and 2, the amount of ultraviolet light emitted to the test site was measured on the left and right portions except the spine area of 12 subjects including 6 males and 6 females. Radiometer) and SED 240 probes were adjusted to 20-100mj / cm 2 and irradiated with a solar simulater (81293 (Xenon UV Lamp 1KW, unfiltered)) lamp. Minimal erythema amount (Minimal Erythema Dosa: MED) was confirmed 24 hours after UV irradiation. In order to confirm the UV blocking effect of the sample to uniformly apply the sample to the same site, such as the subject of Example 1 and Comparative Examples 1 and 2 of Preparation Example 1 to a thickness of 2㎛ / ㎠ It was left to dry for 15 minutes. UV irradiation window was attached and fixed to the sample application site of Comparative Examples 1 and 2 and Formulation Example 1, and other areas except the irradiation window were blocked with UV using a leather and a towel and irradiated with UV light. Based on the subject's MED, SPF 50, the expected sample was started with SPF 15-40, dose, and gradually increased UV dose. The minimum erythema was determined after 24 hours of ultraviolet irradiation, and the ultraviolet blocking effect was calculated according to the following equation (1). Comparative Example 3 could not measure the UV protection effect because the stability is not secured.

The results obtained by measuring the ultraviolet ray blocking effect (SPF) of Example 1 and Comparative Examples 1 and 2 are shown in Table 5 below.

Test group Example Comparative Example 1 Comparative Example 2 Comparative Example 3 SPF (average) 35.1 34.8 7.3 -

Comparing the results of Tables 3 and 4, Comparative Example 1 is similar to Example 1 because it contains the same amount of sunscreen, but the UV protection index similar to that of Example 1, but in terms of use Not as light as Example 1 In Comparative Example 2, although it has a light and moist feeling of use, the degree is also lower than that of Example 1, and since the content of the sunscreen is small, only 1/5 of the UV protection effect is shown, compared to Example 1. Could know.

[ Test Example  3] water resistance measurement

In order to confirm whether the composition of the present invention is imparted to water resistance, the water resistance was measured according to the SPF measurement method using the in vitro water resistance SPF measurement system and the theory of the sunscreen of Korea Patent Publication No. 2006-0038518.

Samples were applied at 2 mg / cm to artificial skin (Vitro Skin; Bio Skin Plate, Beaulax, co., LTD) with respect to the compositions of Example 1 and Comparative Examples 1 to 2 prepared in Preparation Example 1 and UV in a dry state. After the loss of the sunscreen by SPFdry and immersion, the sunscreen ability (SPFwet) after immersion was measured. Next, by comparing the SPFdry and SPFwet to determine the water resistance (water resistance) according to Equation 2 shown in Table 5. Comparative Example 3 was excluded from the evaluation because the stability is not secured.

(Reference: Korean Patent Application Publication No. 2006-0038518 in vitro water resistance SPF measuring system and method for measuring SPF using theory / IFSCC published article "Alternative evaluation method in vitro for water resistant effect of sunscreen products")

Test group Example 1 Comparative Example 1 Comparative Example 2 Comparative Example 3 % WRR 76 39 20 -

As shown in the results of Table 5, in-vitro SPF values before and after immersion in water is in Vitro before and after immersion in Comparative Example 1 in spite of being an oil-in-water composition -vitro) Maintained when compared to the SPF value, it can be confirmed that the water resistance.

Claims (11)

A sunscreen cosmetic composition containing beads containing a sunscreen or a sunscreen. The cosmetic composition according to claim 1, wherein the composition contains a higher alcohol and a fatty acid. The cosmetic composition according to claim 2, wherein the higher alcohol and fatty acid are contained in a ratio of 4.5: 1 to 5.5: 1. The cosmetic composition according to claim 2, wherein the content of the higher alcohol and fatty acid is 1.0 to 5.0% by weight based on the total weight of the composition. The cosmetic composition according to any one of claims 1 to 4, wherein the beads are contained in an amount of 1 to 5% by weight based on the total weight of the composition. The cosmetic composition according to any one of claims 2 to 4, wherein the higher alcohol is at least one selected from the group consisting of behenyl alcohol, cetearyl alcohol, cetyl alcohol and stearyl alcohol. The cosmetic composition according to any one of claims 2 to 4, wherein the fatty acid is at least one selected from the group consisting of stearic acid, behenic acid and palmitic acid. The cosmetic composition according to any one of claims 1 to 4, wherein the content of the ultraviolet absorber and the blocking agent is 10.0 to 40.0% by weight based on the total weight of the composition. The cosmetic composition according to any one of claims 1 to 4, wherein the composition is a gel type. The cinnamate of claim 1, wherein the ultraviolet absorber is octyl methoxycinnamate or cinnamate such as isoamyl-p-methoxycinnamate. ) Derivatives; Salicylic acid derivatives such as butylmethoxy dibenzoylmethane, bisethylhexyloxylphenolmethoxy phenyl triazine or octyl salicylate; PABA (p-aminobenzoic acid) derivatives; Benzophenones; And anthranilate (anthranilates) cosmetic composition, characterized in that at least one selected from the group consisting of. The cosmetic composition according to any one of claims 1 to 4, wherein the sunscreen agent is contained in an amount less than 5% by weight based on the total weight of the composition.