KR20190059663A - Oil-in-water type cosmetic composition for UV protection with water resistance - Google Patents

Abstract

Provided are an oil-in-water type UV-screening cosmetic composition comprising a UV screening agent, alcohol, and a viscosity controlling agent, and a method for producing the same. Accordingly, it is possible to provide an oil-in-water type UV-screening cosmetic composition having water resistance while maintaining light and non-sticky feeling.

Description

[0001] The present invention relates to a water-in-oil type cosmetic composition for UV protection,

To a cosmetic composition for protecting ultraviolet rays having water resistance.

Conventional cosmetic compositions for UV protection having water resistance are mostly prepared as water-in-oil emulsion formulations. This is because the water-in-oil type composition is an oil and the skin is attached to the skin without being washed with water.

However, water-in-oil type emulsion formulations are excellent in water resistance and adhesion, but it is difficult to realize a feeling of lightness and refreshing feeling. Therefore, the ultraviolet screening agent of the water-in-water emulsion formulations is not preferred to consumers due to the feeling of use.

Therefore, there is an increasing demand for water-resistant ultraviolet screening cosmetics such as gels or lotion formulations.

An ultraviolet screening agent, an alcohol, and a viscosity controlling agent, and a process for producing the same.

One aspect provides an underwater-type cosmetic composition for ultraviolet shielding comprising an ultraviolet screening agent, an alcohol, and a viscosity controlling agent.

The ultraviolet screening agent may include both an organic ultraviolet screening agent and an inorganic ultraviolet screening agent. Examples of the ultraviolet screening agent include eicylhexylmethoxycinnamate, titanium dioxide, zinc oxide, butylmethoxydibenzoylmethane, isoamyl p-methoxy cinnamate, May contain at least one member selected from the group consisting of hexylsulfate, hexylsulfate, hexylsulfate, hexylsulfate, hexylsulfate, octylcylenes, homosalate, phenylbenzimidazolesulfonic acid, diethylaminohydroxybenzoylhexylbenzoate, have. The ultraviolet screening agent may be 5-50%, 5-40%, 10-30%, or 15-25% of the total weight of the cosmetic composition.

The alcohol may be any alcohol commonly used in the cosmetics field, and may be a C1-C6 alcohol, a C3-C6 polyhydric alcohol, or a mixture thereof. The C1-C6 alcohol may include methanol, ethanol, propanol, isopropanol, 1,3-propanediol, butanol, pentanol, or hexanol, for example, ethanol or denatured ethanol . The alcohol may be a mixture of water and an alcohol, that is, an aqueous solution of alcohol. The alcohol concentration of the alcohol aqueous solution may be 1 to 100 (w / w)%, for example 1 to 99.5 (w / w)%, 10 to 90 (w / 10 to 70 (w / w)%, 10 to 60 (w / w)%, 10 to 50 (w / w)%, 10 to 40 (w / Or 20 (w / w)%. The alcohol may be contained in an amount of 5-25%, 10-20%, or 13-17% based on the total weight of the cosmetic composition. The alcohol component lowers the surface tension of the water phase to facilitate emulsification without the surfactant and helps to form a quick oil film on the skin after application.

The viscosity modifier may be selected from the group consisting of hydroxyethyl methacrylate / sodium acryloyldimethyltaurate copolymer, sodium acrylate / sodium acryloyldimethyltaurate copolymer, polyacrylate crosspolymer-6, polyacryl amide, Lt; / RTI > and-13. The viscosity adjusting agent may be contained in an amount of 0.5-5%, 1-4%, or 1-3% based on the total weight of the cosmetic composition.

The cosmetic composition may not contain a film-forming agent. This should not be interpreted as including not only a film forming agent at all but also an effective amount to the extent that is generally recognized in the art, that is, not including as an active ingredient. Specifically, when the cosmetic composition contains a film-forming agent in an amount of less than 1%, 0.5%, 0.1%, 0.05%, 0.01% or 0.001% based on the total weight of the composition, it can be regarded as not containing a film-forming agent .

Conventionally, in the case of an ultraviolet screening agent having water resistance, it is generally in the form of a water-in-oil type emulsion in which the external phase is oil or a film-forming agent. However, these sunscreen products have a drawback that they are heavy in use, are oily, and sticky. However, the cosmetic composition containing an ultraviolet screening agent, an alcohol, and a viscosity controlling agent according to one aspect of the present invention is in the form of an oil-in-water type, that is, an emulsion of O / W (oil in water). When applied to skin, Volatilized to form an oil film on the skin surface. The oil film formed in this way does not wash well with water like water-in-oil type emulsion and can exhibit water resistance even without a film-forming agent. In addition, it is possible to provide a cosmetic composition for underwater UV blocking that has an ultraviolet B-blocking index of SPF 30 or more and an ultraviolet A blocking degree of at least PA ++ and has water resistance.

The cosmetic composition may be at least one selected from the group consisting of a lotion (skin lotion), a skin softener, a skin toner, an astringent, a lotion, a milk lotion, a moisturizing lotion, a nutrition lotion, a massage cream, a nutrition cream, a moisturizer cream, a hand cream, a foundation, ≪ / RTI > Compositions of such formulations may be prepared according to methods conventional in the art.

The cosmetic composition may contain at least one selected from the group consisting of preservatives, stabilizers, surfactants, thickeners, solubilizers, moisturizers, emollients, ultraviolet absorbers, preservatives, bactericides, emulsifiers, antioxidants, pH adjusting agents, organic and inorganic pigments, And may further contain additives commonly used in the art. The amount of the additional ingredient such as the preservative may be easily selected by a person skilled in the art within the range not impairing the object and effect of the present invention, and the amount thereof may be 0.001 to 40% by weight based on the total weight of the composition.

Another aspect provides a method for preparing an underwater-type cosmetic composition for UV protection comprising an ultraviolet screening agent, an alcohol, and a viscosity controlling agent.

The cosmetic composition may be prepared by a low-temperature emulsification method. As an aspect of the low-temperature emulsification method, the step of adding alcohol to the aqueous phase; Adding a viscosity controlling agent to the aqueous phase and mixing to form a viscosity; And adding an ultraviolet screening agent to the aqueous phase, mixing and emulsifying the ultraviolet screening cosmetic composition. The method can be carried out at room temperature. For example, at a temperature of from 10 캜 to 50 캜, from 20 캜 to 40 캜, from 25 캜 to 35 캜.

According to one aspect of the present invention, when an alcohol is added to the water phase, the interfacial tension of water is lowered. When the viscosity adjusting agent is added, the viscosity adjusting agent is dispersed in the water-like form in the form of a net, and an oil-soluble component such as an ultraviolet screening agent may be present as large particles therein. Therefore, emulsion particles can be formed by using a viscosity adjusting agent without adding an additional emulsifier. Finally, the emulsion is put into the emulsion.

Therefore, the cosmetic composition prepared by the low temperature emulsification method may not contain an emulsifier. This should be interpreted not only to include no emulsifier at all, but also to include an effective amount to the extent normally recognized in the art, that is, not including as an active ingredient. Specifically, when the cosmetic composition contains an emulsifier in an amount of less than 1%, 0.5%, 0.1%, 0.05%, 0.01% or 0.001% based on the total weight of the composition, it can be regarded as not containing an emulsifier.

The formulation of the cosmetic composition prepared by this method is a water-in-oil type emulsion. Although it is light and moist feeling at the time of applying the skin, a thin oil film is formed on the skin as it is absorbed and becomes similar to the water-in-water type emulsion. Therefore, the ultraviolet shielding oil film formed may have water resistance.

An underwater type cosmetic composition for ultraviolet screening comprising a ultraviolet screening agent, an alcohol and a viscosity controlling agent and a method for producing the same can provide an underwater type cosmetic composition for ultraviolet screening having water resistance while maintaining a feeling of lightness and non- .

Fig. 1 shows the sensory evaluation data of the cosmetic composition prepared according to one aspect.
Fig. 2 shows evaluation of washability of the cosmetic composition prepared according to one embodiment.

Hereinafter, the present invention will be described in detail with reference to Examples and Experimental Examples. However, the embodiments and experimental examples according to the present invention can be modified into various other forms, and the scope of the present invention should not be construed as being limited to the above-described embodiments and examples. The embodiments and experimental examples of the present invention are provided to enable those skilled in the art to more fully understand the present invention.

Example  1. Low temperature emulsification method Cosmetics  Preparation of composition

An oil-in-water emulsion having a water resistance was prepared by low energy emulsification which emulsified at room temperature according to the contents and contents shown in Table 1 below. The specific manufacturing process is as follows.

ingredient Content (% by weight) Example 1 Comparative Example 1 Purified water To 100 To 100 ethanol 15.0 - To a solution of < RTI ID = 0.0 & 7.0 7.0 Homosalate 7.0 7.0 Diethylaminohexoxybenzoylhexylbenzoate 4.0 4.0 Titanium dioxide 5.0 5.0 FAGE -100 stearate - 1.0 Polysorbate 60 - One Hydroxyethyl methacrylate / sodium acryloyldimethyltaurate copolymer 2.0 1.5 antiseptic 0.5 0.5

The beaker was first metered in by adding purified water and ethanol, followed by the addition of hydroxyethyl methacrylate / sodium acryloyldimethyltaurate copolymer. The mixture was then homogeneously mixed at room temperature and 3000 rpm for 5 minutes. After the viscosity was formed by mixing, the oily component consisting of the ultraviolet screening agent and the preservative were slowly added. Simultaneously with the addition, the mixture was uniformly mixed at 3000 rpm for 5 minutes and emulsified.

As a result, a composition in the form of a yellow gel cream was finally obtained.

Comparative Example  1. High temperature emulsification method Cosmetics  Preparation of composition

An oil-in-water type emulsion having water resistance was prepared by the high temperature emulsification method with the composition shown in Table 1 above. The specific manufacturing process is as follows.

Purified water was first weighed in a beaker and heated to a temperature of 75 to 80 ° C and then prepared. The oil component composed of the ultraviolet screening agent and the surfactant was heated to a temperature of 75 to 80 ° C to completely dissolve it. The purified water was added to the beaker to be measured, and the mixture was homogeneously mixed and emulsified at 3000 rpm for 5 minutes. After mixing, hydroxyethyl methacrylate / sodium acryloyldimethyltaurate copolymer and preservative were added at the same temperature and mixed homogeneously at 3000 rpm for 5 minutes. The bubbles were then removed and cooled.

Finally, a milky to yellow creamy composition was obtained.

Experimental Example  1. Sensory Evaluation Data

The feeling of use of the composition prepared in Example 1 and Comparative Example 1 was evaluated. Detailed evaluation methods and results are as follows.

The results are shown in Table 1. The results are shown in Table 1. The results are shown in Table 1. The results are shown in Table 1. The results are shown in Table 1. [ Respectively.

The spreadability of the above evaluation criteria indicates that it spreads easily on the skin without being stiff. The freshness refers to the light and refreshing feeling when applying the skin. Thin spreading refers to the feeling that the composition does not thicken on the surface of the skin when applied to the skin but thinly swollen. Absorbency refers to the extent to which the composition is absorbed into the skin after application to the skin. The finishing afterglow represents the degree of oiliness and the degree of blushing remaining on the skin after the composition is absorbed. These five criteria increase the use value of cosmetics. Especially, spreadability and freshness can be a feature that consumers consider important in cosmetics with ultraviolet shielding function recently.

As shown in FIG. 1, the cosmetic composition of Example 1 was found to be superior in spreadability, freshness, spreadability, and absorbency than the cosmetic composition of Comparative Example 1, according to the comparative evaluation results of Examples and Comparative Examples according to the present invention. The same evaluation results were obtained for the finishing afterglows of Examples and Comparative Examples using the same ultraviolet shielding component.

Particularly, the compositions of the examples showed that spreadability and thinning ability were significantly superior to those of the comparative examples. This shows that the composition is easily spread on the skin and applied with a thin and light feeling because it is a formulation without addition of ethanol and emulsifier.

Experimental Example  2. Evaluation of water resistance efficacy

The composition of Example 1 was subjected to a waterproofing efficacy evaluation in a clinical laboratory.

The water resistance efficacy evaluation was carried out according to the method presented by Cosmetics Europe SPF Test Method (ISO 24444) / Guidelines for Evaluating Sun Product Water Resistance (rev. 2005) and ELID Standard Work Guide (EL-P-7400). According to this method, when the water resistance ratio is 50% or more, the water resistance effect is shown. The measurement and determination of the minimum erythemal dose (MED) of the subject's non-cannulated area, the measurement and determination of the minimum erythema of the sample application site, and the minimum erythema of the water- The evaluation of the water resistance UV protection effect of the sample was carried out through the measurement, the determination and the data analysis. The experiment was repeated 3 times.

The results of the above evaluation method are shown in Table 2 below.

The water resistance clinical results of the composition prepared according to Example 1 Subj. No dSPF
(Dry SPF) wSPF
(Immersion SPF) % WRR
(Water resistance ratio) P1 52.0 28.0 53.8 P2 30.3 18.2 60.0 P3 53.0 28.0 52.8 Average 45.1 24.7 55.5%

As can be seen from the results shown in Table 2, the composition prepared by Example 1 has a water resistance ratio of 50% or more and has a water resistance effect that does not wash well in water .

Example  3. Washability  evaluation

The washability of the cosmetic composition of Example 1 was evaluated. The washability evaluation was carried out according to the following method.

The composition according to Example 1 was applied on the skin in an amount of 2 [mu] L / cm < ² >, absorbed and then imaged with VISIA CR-2.2 (Canfield Scientific, Inc., USA). The application site was evident by the sunscreen agent, and then the application site was cleaned with lukewarm water at about 40 캜 for 30 seconds. After rinsing, the skin was dried and then the area coated with the same device was again photographed and compared with that before cleaning.

The results are shown in Fig. It was confirmed that the composition prepared in Example 1 remained in the application site even after washing with lukewarm water, and it was confirmed that the composition had a water resistance that was not washed well by water.

Claims (7)

5-50% by weight of an ultraviolet screening agent;
5-25% by weight alcohol; And
0.5 to 5% by weight of a viscosity controlling agent. The ultraviolet screening composition according to claim 1, wherein the ultraviolet screening agent is at least one selected from the group consisting of ethylhexylmethoxycinnamate, titanium dioxide, zinc oxide, butylmethoxydibenzoylmethane, isoamyl p-methoxycinnamate, hexylhexylsalicylate, octocrylene, Wherein the cosmetic composition is at least one selected from the group consisting of phenylbenzimidazolesulfonic acid, diethylaminohydroxybenzoylhexylbenzoate, and polysilicon-15. The composition of claim 1, wherein the viscosity modifier is selected from the group consisting of hydroxyethyl methacrylate / sodium acryloyldimethyltaurate copolymer, sodium acrylate / sodium acryloyldimethyltaurate copolymer, polyacrylate crosspolymer- Amide, and polyacrylate-13. The cosmetic composition according to claim 1, wherein the cosmetic composition does not contain a film-forming agent or an emulsifier as an active ingredient. Adding an alcohol to the water phase;
Adding a viscosity controlling agent to the aqueous phase and mixing to form a viscosity; And
Adding an ultraviolet screening agent to the aqueous phase, and mixing and emulsifying the ultraviolet screening agent. The method according to claim 5, wherein said emulsification is carried out at a temperature of from 10 캜 to 50 캜. The method according to claim 5, wherein the cosmetic composition does not contain a film-forming agent or an emulsifier as an active ingredient.

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