KR20040070530A - Cosmetic composition for preventing sunburn - Google Patents

Abstract

PURPOSE: A sunscreen cosmetic composition containing a specified water soluble polymer and ester oil of liquid oils in a specified ratio is provided. It is an O/W emulsion which has excellent ultraviolet rays-screening effect and is improved in skin irritation and skin feel. CONSTITUTION: The sunscreen cosmetic composition contains: 0.1 to 10% by weight of one or more ester oils containing diethoxyethylsuccinate; 0.2 to 5% by weight of one or more water soluble polymers containing acrylate/C10-30 alkyl acrylate crosspolymer; 15 to 35% by weight of an ultraviolet screening agent; and 50 to 70% by weight of an aqueous phase component. The water soluble polymers are selected from carboxyl vinlypolymer, acrylate/C10-30 alkyl acrylate crosspolymer, xanthan gum, hydroxyethyl cellulose, hydroxypropyl cellulose and polyacrylamide.

Description

Cosmetic composition for preventing sunburn {Cosmetic composition for preventing sunburn}

The present invention relates to an anti-burning cosmetic composition having excellent usability, stability, and UV protection, and more particularly, to a water-soluble polymer compound in preparing an O / W-type sunscreen cosmetic containing an oil phase part, a water phase part, and a sunscreen agent. By using ester oil as a main component, the UV protection index SPF is superior to the cosmetics with excellent feeling and excellent usability.

In general, ultraviolet rays irradiated from sunlight are divided into three areas according to wavelengths. When the ultraviolet rays are excessively irradiated to the skin, the main causes of erythema, edema, freckles, and skin cancer are caused by various skin diseases caused by recent ultraviolet rays. Much research is in progress.

In general, ultraviolet light is classified according to its wavelength, the wavelength of 240-280 nm is UV-C, the wavelength of 280-320 nm is UV-B, and the wavelength of 320-400 nm is UV-A. UV-C is a short-wave ultraviolet light that passes through the ozone layer and disappears without reaching the surface. UV-B penetrates the skin's epidermis with medium-wave ultraviolet light, causing inflammation, erythema, freckles, and edema. UV-A is known to induce skin aging and skin irritation by penetrating into the dermis of the skin with long-wavelength ultraviolet rays and promoting skin cancer, wrinkles and melanin formation during skin blackening (tanning) or long-term exposure. Numerous epidemiological studies have demonstrated a strong relationship between sun exposure and human skin cancer, and in more detail DeSimone, "Sunscreen and Suntan Products", Handbook of Nonprescription Drugs, 7 ^th Ed., Chapter 26, pp 499-511 (American Pharmaceutical Association) , Washington, DC; 1982).

Due to the above mentioned risks associated with sun exposure, the general public's interest in the market for skin protection products from the sun has increased considerably, and as a result, sunscreen products with various types of UVF have been introduced to the market. have. However, sunscreen products are octylmethoxycinnamate, octylsalicylate, octocrylene, butylmethoxydibenzoylmethane, oxybenzone, octyltrizone, menthyl anthranilate and 3,4 used to have high SPF values. -Consumers have a high level of dissatisfaction with the sticky, heavy and greasy feeling caused by organic sunscreens such as methylbenzylidene camphor and the unnaturalness caused by turbidity caused by inorganic sunscreens such as titanium dioxide, zinc oxide and iron oxide.

Considering the increasing consumer awareness of UV rays, not only the summer of UV exposure, but also the increasing number of daily use of the four seasons, such consumer complaints are a more serious problem. The research is actively underway (Korean Patent Publication No. 2000-63019).

An emulsification method using a water-soluble high molecular compound and an ester oil refers to dissolving a low-solubility sunscreen agent in an ester oil and emulsifying it with a homogenizer using a water-soluble high molecular compound instead of a commonly used emulsifier.

When water-soluble polymer compounds are used as emulsifiers, skin irritation by general emulsifiers can be significantly reduced, and the sticky and heavy feeling can be significantly improved, and light and safe ester oils can be used stably to improve the solubility of the sunscreen and improve efficiency. Since the water-soluble polymer compound has a large molecular weight and bulk so that the sunscreen agent can be emulsified and dispersed evenly, it is widely spread evenly when applied to the skin to protect the skin, thereby providing excellent UV blocking effect.

Accordingly, the present inventors have conducted research to improve the sticky, heavy, and greasy feeling of the conventional sunscreen cosmetics with a light and fresh feeling, and to provide excellent sunscreen effect, and as a result of the acrylate / C _10-30 alkyl as an emulsifier and stabilizer, When acrylate crosspolymer (Acrylate / C _10-30 Alkyl Acrylate Crosspolymer) is used and an ester oil, diethoxyethyl succinate, is used to prepare O / W type sunscreen cosmetics, the solubility of the sunscreen agent is improved. The skin stimulation is significantly low and the present invention was completed by confirming that the sticky, heavy and greasy feeling of the disadvantages of the conventional sunscreen cosmetics is not only remarkably improved but also the sunscreen effect is relatively excellent.

Accordingly, it is an object of the present invention to provide a sunscreen cosmetic composition having improved solubility of the sunscreen and excellent sunscreen effect (SPF) while improving skin irritation and usability.

The anti-burn cosmetic composition of the present invention for achieving the above object comprises 0.1 to 10% by weight of at least one ester oil containing diethoxyethyl succinate, an acrylate crosspolymer of acrylate / C _10-30 alkyl. 0.2 to 5% by weight of one or more water-soluble high molecular compounds, 15 to 35% by weight of a sunscreen and 50 to 70% by weight of a water component.

The composition of the present invention is an O / W emulsion in which an oil phase is emulsified and dispersed in an aqueous phase, and preferably, an acrylate crosspolymer of an acrylate / C _10-30 alkyl as an aqueous phase and diethoxyethyl succinate as an oil phase is 0.1 Emulsify at a weight ratio of 2: 2.

When the ester oil is one or more, the weight ratio of diethoxyethyl succinate and the other ester oil is preferably 2: 1. The composition ratio of the composition according to the present invention, the weight ratio of acrylate crosspolymer and diethoxyethyl succinate at the time of emulsification, and the composition ratio of ester oil are optimal ratios considering the solubility of the sunscreen, formulation stability, skin irritation and feeling.

The O / W type emulsion composition for sunscreen cosmetics according to the present invention is largely composed of an oil phase component and an aqueous phase component, and the oil phase component is an O / W type emulsion which is emulsified and dispersed in the aqueous phase component. In the composition of the present invention, the oil phase component is an ester oil, and the water phase component is an aqueous solution containing a water-soluble high molecular compound, wherein the sunscreen is emulsified in the ester oil which is an oil phase component.

The oil phase component used in the present invention is usually used in cosmetics, and is preferably a liquid emulsion at room temperature. For example, castor oil, olive oil, avocado oil, palm oil, safflower oil, sunflower oil, such as sunflower oil, liquid paraffin, hydrocarbons, such as squalane, caprylic / capric triglyceride, etc. Triglycerides, isopropyl myristate, isopropyl palmitate, octyldodecyl myristate, cetyl 2-ethylhexanoate, isopropyl stearate, trioctanoin, diethoxyethyl succinate, octyl succinate, neopentyl Esters such as glycol dicaprate, octyldodecyl myristate, isostearyl isostearate, isononyl isononanoate, dimethyl polysiloxane, methylphenyl polysiloxane, diphenyl polysiloxane, octamethyl cyclotetrasiloxane, decamethyl cyclopentasiloxane, Silicones such as methyl polysiloxane are considered safe for human body You can use what is being said.

Among these, it is preferable to use a combination of diethoxyethyl succinate and at least one ester oil and to mix 0.1 to 10% by weight with respect to the emulsion composition of the present invention, more preferably diethoxyethyl succinate And at least one ester oil in a ratio of 2: 1 to mix 1.0 to 8.0 wt%. In this ratio and content range, it can be seen that the solubility of the sunscreen is improved and the use of the skin is excellent while maintaining the formulation stability. Ester oils are light and safe, improving the solubility of the sunscreen and thereby maximizing the sunscreen efficiency.

The water-soluble high molecular compound used in the present invention may be selected from at least one selected from carboxyl vinyl polymer, acrylate crosspolymer of acrylate / C _10-30 alkyl, xanthan gum, hydroxyethyl cellulose, hydroxypropyl cellulose, polyacrylamide, and the like. Can be used. Of these, it is preferable to use an acrylate crosspolymer of acrylate / C _10-30 alkyl, and more preferably, a combination of an acrylate crosspolymer of acrylate / C _10-30 alkyl and at least one water-soluble high molecular compound. do.

When water-soluble polymer compound is used as an emulsifier, the skin irritation by the general emulsifier can be significantly lowered and the sticky and heavy feeling of use can be greatly improved. In addition, since the water-soluble polymer compound has a large molecular weight and bulk, the sunscreen agent can be emulsified and dispersed evenly, thus being widely applied to the skin to improve the sunscreen efficiency.

It is also preferable to use an acrylate crosspolymer of acrylate / C _10-30 alkyl in the water-soluble high molecular compound and diethoxyethyl succinate in the ester oil in a weight ratio of 0.1: 2. When emulsified in the weight ratio, the feeling of use is excellent, the emulsion stability is maintained for a long time, and the skin irritation may be significantly reduced.

The sunscreen used in the present invention is a conventional inorganic or organic sunscreen, and may include octylmethoxycinnamate, octylsalicylate, octocrylene, butylmethoxydibenzoylmethane, oxybenzone, octyltriazone, menthyl anthranilate And an organic sunscreen composed of 3,4-methylbenzylidene camphor can be selected and used.

The aqueous phase component used in the present invention may be at least one selected from purified water, propylene glycol, 1,3-butylene glycol, glycerin, and sorbitol as a medium for forming an aqueous phase. In addition to these components, preservatives, fragrances and other additives may be optionally used in the cosmetic composition according to the present invention.

Hereinafter, the present invention will be described in more detail based on the following Examples and Comparative Examples. However, these Examples and Comparative Examples are only for the understanding of the present invention, and the scope of the present invention in any sense is not limited to these Examples.

Examples 1-2 and Comparative Examples 1-4

To prepare a sunscreen cosmetic composition consisting of components and contents as described in Table 1 below.

The production method of Examples 1 to 2 prepared using a homogenizer is as follows. The oily ingredients were mixed at a weight ratio shown in Table 1 and heated and stirred at 70 ° C. to prepare uniformly. The cosmetic composition of the present invention was prepared by mixing a water-soluble polymer compound and an aqueous phase component in a separate mixer in the weight ratio shown in Table 1, adding an oil phase component having a temperature of 70 ° C. to the aqueous phase while stirring and warming to 70 ° C., and then emulsifying and cooling it. . At this time, the sunscreen was added to the oil phase component and emulsified. UV-blocking emulsions of Comparative Examples 3 to 4 were prepared by heating the oil phase component and the water phase component to 70 ° C. as described above, and then adding the oil phase component to the water phase, emulsifying with a homomixer, and cooling.

division Raw material name Content (% by weight) Example 1 Example 2 Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Awards Purified Water Propylene Glycol Butylene Glycol Carbomer Acrylate / C _10-30 AlkylAcrylate Crosspolymer To1002.05.00.140.2 To1002.05.00.140.2 To1002.05.00.34- To1002.05.00.34- To1002.05.00.14- To1002.05.00.14- Paid Diethoxyethylsuccinate octyldodecanoltrioctanoinC _12-14 alkylbenzoate cetyloctanoate polysorbate 60 sorbitan stearate 4.0-2.0 ---- 4.0-2.0 ---- -4.02.0 ---- --2.04.0 --- -3.04.02.03.01.01.0 -3.04.02.03.01.01.0 Sunscreen Sunscreen 1 Sunscreen 2 Sunscreen 3 Sunscreen 4 Sunscreen 5 7.02.06.0-- 7.02.06.0-5.0 7.02.06.0-- 7.02.06.0-- 7.02.06.0-- 7.02.06.05.05.0 additive Fragrance Proper quantity Proper quantity Proper quantity Proper quantity Proper quantity Proper quantity Sunscreen 1: Octylmethoxycinnamate UV blocker 2: Butylmethoxydibenzoylmethane UV blocker 3: Octocrylene UV blocker 4: Octylsalicylate UV blocker 5: Octyltriazone

Experimental Example 1: Stability Evaluation

Stability evaluation was performed on the products prepared according to the above Examples and Comparative Examples. After 3 months at 45 ° C and 0 ° C as a method of stability evaluation, the separation phenomenon due to the suspension of oil and precipitation at low temperature were observed and determined by visual observation and a microscope. The results are shown in Table 2 below.

Example 1 Example 2 Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 45 ℃ ○ ○ △ ○ ○ ○ 0 ℃ ○ ○ X X ○ ○ ○: good, △: slightly unstable, X: unstable

According to the results of Table 2, the composition of the present invention prepared in Example was excellent in stability, in the case of Comparative Examples 1 and 2 was poor in stability, and in the case of Comparative Examples 3 and 4 showed a good result in stability.

Experimental Example 2: Customer Sensory Test

Twenty general females aged 20 to 35 years old were evaluated for each evaluation item. The evaluation was performed by removing the makeup beforehand and applying the skin to the face.

The applicability of the product was applied with fresh, light and less oil and the skin feeling after use.The sensory evaluation was very good (5 points), excellent (3 points), moderate (0 points), bad (-3 points). ), Very poor (-5 points) was performed based on the criteria and the rating was calculated according to the following equation (1). Table 3 shows the results of the sensory evaluation.

Example 1 Example 2 Comparative Example 3 Comparative Example 4 Freshness 4.2 3.5 3.2 2.8 Bundle 4.1 3.9 3.3 3.0 Oil after use 4.0 3.8 3.7 3.6 Overall satisfaction 4.2 3.8 3.3 3.2

According to the results of Table 3, the compositions of the present invention prepared in Examples 1 and 2 were superior to the feeling of freshness, lubrication, etc. and oil after use than the compositions of Comparative Examples 3 to 4, the result is excellent overall satisfaction Superior. In particular, in the case of Example 2 having a high content of the sunscreen, the satisfaction was higher than that of the composition of Comparative Example 3 less. Formulation stability is excellent with the use of emulsifiers, but showed a big difference in the comparison of feeling. In the case of Example 1, the feeling of satisfaction was superior to the composition of Comparative Example 3 in all respects.

Experimental Example 3: Skin Safety Test

Skin safety test was performed using the product stock solution prepared in Example and Comparative Example as it was and applying a patch test bandage on the forearm of 30 healthy males and females to perform a 24-hour patch test. After removing the band-aid, the reaction of erythema (positive reaction) on the skin was observed after 4 hours, and the stimulation index was calculated according to Equation 2 after classifying the stimulus according to the following criteria. Same as

reaction Stimulus Symptoms and Criteria - 0 No response +/- 0.5 Weak erythema + 1.0 Clear erythema ++ 2.0 Severe erythema with edema +++ 3.0 Severe erythema with bullous, edema

Example 1 Example 2 Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Skin irritation index 0.01 0.05 0.22 0.21 0.21 0.21

As shown in Table 5, the composition of the present invention also showed excellent safety in terms of skin safety, and the composition of the comparative example had a fear of irritation when compared with the composition of the example.

Experimental Example 4: Sun protection factor (SPF)

In vitro SPF evaluation was performed to determine the sunscreen effect of the composition according to the present invention. Samples of Example 1 and Comparative Example 3 were applied to Transporetape at a level of 2 μl / cm 2, dried for 15 minutes, and measured in vitro SPF values using an SPF 290 analyzer. The experiment was made as the average value after three measurements, the results are shown in Table 6.

Example 1 Comparative Example 3 In vitro SPF 25.3 21.1 Standard Deviation 2.3 2.1

As a result of measuring in vitro SPF, the compositions of Example 1 and Comparative Example 3 each contained the same amount of sunscreen stably, but the composition of Example 1 showed significantly higher SPF than Comparative Example 3 It was. As described above, the composition of the present invention was also light and fresh, and it was confirmed that there was a significant difference in the sunscreen index (SPF).

As described above, the anti-burn cosmetics of the present invention have good temperature stability (high temperature and low temperature) and have a great difference in stickiness and freshness as a result of evaluating the feeling of use, and there is no burden on the skin after use and there is no residual feeling, and it is light and fresh feeling (feeling of use). ) In particular, the composition of the Example was superior to the composition of the comparative example in the various evaluations, such as feeling evaluation, UV blocking index, skin irritation and the like.

As described above, the anti-fog cosmetics of the present invention in which a certain water-soluble high molecular compound and an ester oil in a liquid oil are mixed at a predetermined ratio have excellent UV blocking effect and are light and fresh after use without burdening the skin during use. There is no burden and skin safety can be minimized.

Claims (4)

When diethoxy-ethyl carbonate seat 0.1 to 10% by weight of at least one ester oil containing, acrylates / C _10-30 acrylate cross polymer comprising one or more of the _{(Acrylate / C 10-30 Alkyl Acrylate Crosspolymer} ) alkyl An anti-pigmented cosmetic composition comprising 0.2 to 5% by weight of a water-soluble polymer compound, 15 to 35% by weight of a sunscreen, and 50 to 70% by weight of an aqueous phase component. The anti-burn cosmetic according to claim 1, wherein an acrylate crosspolymer of acrylate / C _10-30 alkyl, which is a water-soluble high molecular compound, and diethoxyethyl succinate, which is an ester oil, are emulsified at a weight ratio of 0.1: 2. Composition. 2. The anti-burn cosmetic composition according to claim 1, wherein the compounding weight ratio of diethoxyethyl succinate and other ester oil is 2: 1. The method of claim 1, wherein the water-soluble high molecular compound is one selected from carboxyl vinyl polymer, acrylate crosspolymer of acrylate / C _10-30 alkyl, xanthan gum, hydroxyethyl cellulose, hydroxypropyl cellulose, polyacrylamide Anti-nitrogen cosmetic composition characterized in that the above.