KR20100135537A - Sun block cosmetics composition having water resistance and easy washability together - Google Patents

Abstract

PURPOSE: A cosmetic composition of oil-in-water for protecting UV is provided to ensure excellent waterproof and cleansing effect with soft feeling. CONSTITUTION: A cosmetic composition of water-in-oil with improved cleansing effect contains fatty acid and non-ionic surfactant. The composition also contains UV protection ingredient. The fatty acid is contained in 0.1-10 weight% based on total weight and has 8-24 carbon atoms.

Description

Sun-block cosmetics composition having water resistance and easy washability together

The present invention relates to a water-in-oil cosmetic composition, and more particularly, to a water-in-oil cosmetic composition for sun protection, which is a water-in-oil emulsion having excellent water resistance at low pH, and is converted to an oil-in-water emulsion having excellent cleansing properties at high pH when washing skin. It can realize the same level of water resistance and high level of cleansing at the same time as the existing sunscreen cosmetic composition, and it is not sticky because it increases the soft texture and light and comfortable feeling when used on the skin, and also has excellent temperature stability at high temperature. It relates to a sunscreen cosmetic composition excellent in skin protection effect and very excellent skin safety.

In general, the emulsified cosmetic composition forms are classified into oil-in-water (O / W) and water-in-oil (W / O). The oil-in-water type (O / W) is a hydrophilic type that has the advantage of being moist, soft, and cleansing well, while having poor water resistance. The oil-in-water type (W / O), which is a lipophilic type that has been compensated for by these disadvantages, has very good water resistance, but is poor in use, such as coating property and stickiness, and is not well washed.

In order to improve the water resistance and durability of oil-in-water cosmetic composition, Korean Laid-Open Patent Publication No. 2006-0108118 proposes an oil-in-water cosmetic composition containing alkyl or alkynyl phosphoric acid, and Korea Patent Publication No. 2002-57493 No. discloses a method using a silicone-coated pigment and spraying the pigment in an oil phase, and Korean Unexamined Patent Publication No. 2000-62882 discloses an oil-in-water emulsion cosmetic composition using an acrylic terpolymer. Publication No. 2000-77463 discloses a process for preparing an oil-in-water emulsion using a combination of crosslinked solid organopolysiloxane elastomers and neutralized poly (2-acrylamido-2-ethylpropanesulfonic acid) polymers.

However, the effect of improving the water resistance of the oil-in-water cosmetics having excellent washability is still insignificant, and there is no report on the improvement of the washability of the water-in-oil cosmetics having excellent water resistance.

Therefore, the technical problem to be achieved by the present invention is to provide a water-in-oil type (W / O) cosmetic composition excellent in water resistance and cleansing at the same time, excellent in use and moisturizing effect, and excellent in storage stability and skin safety.

In order to achieve the above technical problem, the present invention includes a general water-in-oil type nonionic surfactant having a low HLB, such as fatty acids and polystyrene glycol dimethicone, sorbitan sesquioleate, etc. It provides a water-in-oil type (W / O) cosmetic composition comprising 80% by weight and 20-90% by weight of the aqueous phase component.

[Formula 1]

R-COOH

In Formula 1, R is a saturated alkyl group or unsaturated alkenyl group having 8 to 23 carbon atoms. R is straight or branched.

EMBODIMENT OF THE INVENTION Hereinafter, this invention is demonstrated more concretely.

The fatty acid emulsifier represented by Formula 1 exhibits high water resistance by acting as a water-in-oil type (W / O) emulsifier at an interface between an aqueous phase and an oil phase at a pH of 3 to less than 9, which is the pH of a conventional cosmetic composition. Above pH 9, it acts as an oil-in-water (O / W) emulsifier to improve the cleansing.

More specifically, the compound of Formula 1 has a low HLB (Hydrophilic-lipophilic balance) value of 5 or less at a low pH of less than 9 is characterized by forming an emulsion of W / O type, on the contrary general soap At high pH of 9 or more, the carboxylic acid is completely neutralized and has high HLB value of 17 or more with anion, which can cause phase change from W / O type to O / W type emulsion. This type of emulsion has water resistance when applied to the skin, but also exhibits high cleansing properties when soap is washed.

The compound of Formula 1, preferably R is a saturated alkyl group or unsaturated alkenyl group having 8-23 carbon atoms, for example, octyl, lauryl, myristyl, cetyl, stearyl, oleyl, isostearyl, etc. It is not limited to this. The compound of formula 1 may be used as one compound or a mixture of two or more kinds.

The cosmetic composition of the present invention comprises 10-80% by weight of the oil phase component and 20-90% by weight of the water phase component including an anionic emulsifier which is a fatty acid and a nonionic emulsifier (surfactant). The oil phase component may include an emulsifier, an emulsion stabilizer and an oil, and the water phase component may include a moisturizer and a residual amount of water, but is not limited thereto.

The anionic emulsifier is one emulsifier selected from the compound represented by Formula 1, and may be used in the cosmetic composition at 0.1-10% by weight based on the total weight of the composition. If the content of the emulsifier is less than 0.1% by weight, it is difficult to form the emulsified particles properly, and when the content of the emulsifier exceeds 10% by weight, a problem may occur rather than normal emulsion formation.

The nonionic surfactants include polyoxyethylene stearyl ether, polyoxyethylene oleyl ether, polyoxyethylene octyldodecylethylene stearyl ether, polyoxyethylene cetyl ether, polyoxyethylene nonylphenyl ether, poly Oxyethylene octylphenyl ether, polyoxyethylene oleate, polyoxyethylene stearate, polyoxyethylene sorbitanate, polyoxyethylene sorbitan stearate, polyoxyethylene sorbitan laurate, polyoxyethylene sorbitan sesquioleate , Polyoxyethylene sorbitan palmitate, polyoxyethylene sorbitan trioleate, polyoxyethylene glyceryl stearate, polyoxyethylene glyceryl isostearate, dioctyl dodecyllauryl glutamate, dioctyl dodeces-2 Uryl Glutamate, Dioctyldodeces-5 Lauryl Glutamate, Polyoxyethylene Hydrogenated Castor Oil Fish Eisostearate, polyoxyethylene hydrogenated castor oil monostearate, polyglyceryl-2-polyhydroxystearate, polyglyceryl-3-diisostearate, sorbitan stearate, polyoxyethylene dimeth It may be an emulsifier such as chicon, but is not limited thereto. The nonionic emulsifier may be used one or two or more kinds, it may be included in the cosmetic composition as 0.1-10% by weight relative to the total weight of the composition.

The emulsification stabilizer may be used in conventional cosmetics, for example, distearyldimonium hectorite, magnesium aluminum silicate, distearyldimonium chloride and the like may be used, but is not limited thereto. The emulsion stabilizing aid may be included in the cosmetic composition as 0.1-10% by weight relative to the total weight of the composition.

The oil may be a vegetable oil, an animal oil, a silicone oil or a mixture thereof, preferably a silicone oil. Silicone oils include both volatiles and nonvolatiles. Examples of volatile silicone oils include dimethicone, cyclopentasiloxane, methylphenyl polysiloxane, and phenyltrimethicone. Examples of nonvolatile silicone oils include polyalkyl siloxane and poly Alkylarylsiloxanes, polyether siloxane copolymers, and the like, but are not limited thereto. The silicone oil may be used in one kind or two or more kinds, and may be included in the cosmetic composition in an amount of 1-30% by weight based on the total weight of the composition. In addition, in addition to silicone oil, synthetic ester or ether-based oils with low irritation to the skin may be additionally used in an amount of 1-10% by weight based on the total weight of the composition.

The moisturizing agent may be used at least one selected from the group consisting of 1,3-butylene glycol, glycerin, propylene glycol, betaine and sorbitol, which may be included in the cosmetic composition as 1-20% by weight relative to the total weight of the composition. .

The water-in-oil cosmetic composition of the present invention may further include all kinds of ingredients usable in conventional cosmetics, such as sunscreens, perfumes, preservatives, antioxidants, and the like, and may further include sunscreen ingredients.

As the UV blocking component which may be included in the water-in-oil type cosmetic composition for sunscreen according to the present invention, there are an inorganic UV blocking component and an organic UV blocking component. As the inorganic UV blocking component, zinc oxide and titanium dioxide may be used alone or in combination. As the organic sunscreen component, ethhexyl methoxycinnamate, octocrylene, ethhexyl salicylate, bis-hexyl oxyphenol methoxyphenyl triazine, homosalate and the like may be used alone or in combination. It may be, but is not limited thereto. The sunscreen ingredient according to the invention may be included in 1-50% by weight relative to the total weight of the composition.

The water-in-oil cosmetic composition of the present invention may be provided for the use of basic cosmetics, makeup cosmetics, body cosmetics, hair cosmetics, scalp cosmetics or oral cosmetics, and preferably may be provided as basic cosmetics. The basic cosmetics include skin, lotion, essence, cream, eye cream, sun cream, and the like.

The water-in-oil cosmetic composition of the present invention is a water-in-oil cosmetics by mixing the water phase components and dissolving sufficiently at 65-75 ℃, warmed to 65-75 ℃ and slowly added to the dispersed oil phase component mixture, and then cooled with stirring It can be produced as a type cosmetic. Cosmetic production method according to the present invention can be easily carried out by those skilled in the art, it is also possible to manufacture a water-in-oil cosmetic composition according to the present invention by modifying a part of the method.

The present invention provides a water-in-oil cosmetic composition that has the advantage of being able to easily wash off with soap and effectively block ultraviolet rays while having excellent water resistance at the same time. That is, the cosmetic composition of the present invention was a water-in-oil emulsion having excellent water resistance at a low pH, but is converted into an oil-in-water emulsion having excellent washability at a high pH when washing the skin, and has a high water resistance and high level equivalent to that of a conventional sunscreen cosmetic composition. It can realize the same level of cleansing at the same time, and it is not sticky because it increases the soft texture and light and comfortable feeling when used on the skin, and it has excellent temperature stability at high temperature, excellent skin protection effect, and excellent skin safety. It provides a cosmetic composition.

Hereinafter, examples and the like will be described in detail to help understand the present invention. However, embodiments according to the present invention can be modified in many different forms, the scope of the invention should not be construed as limited to the following examples. Embodiments of the present invention are provided to more fully describe the present invention to those skilled in the art.

<Production of Comparative Example>

Using the composition components and contents shown in Table 1 below, the cosmetic composition (sun cream) of Comparative Example 1 was prepared by a conventional method.

Division (weight%) Comparative Example 1 Purified water To 100 glycerin 3.00 1,3-butylene glycol 4.00 Methylparaben 0.25 Eichparaben 0.10 Magnesium sulfate 1.00 Titanium dioxide 2.00 Zinc oxide 6.00 Cetylethylhexanoate 3.00 Ethylhexylmethoxycintamate 7.35 Distearyldimonium hectorite 1.00 Distearyldimonium chloride 0.20 Cyclopentasiloxane 20.00 Sorbitan Sesquioleate 1.00 Fiji-10 dimethicone 2.50 Spices 0.20

Preparation of Example 1-5

To the cosmetic composition (emulsion) of Example 1-5 was prepared in a conventional manner using the composition components and contents shown in Table 2 below.

Division (weight%) Example 1 Example 2 Example 3 Example 4 Example 5 Purified water To 100 To 100 To 100 To 100 To 100 glycerin 3.00 3.00 3.00 3.00 3.00 1,3-butylene glycol 4.00 4.00 4.00 4.00 4.00 Methylparaben 0.25 0.25 0.25 0.25 0.25 Eichparaben 0.10 0.10 0.10 0.10 0.10 Magnesium sulfate 1.00 1.00 1.00 1.00 1.00 Titanium dioxide 2.00 2.00 2.00 2.00 2.00 Zinc oxide 6.00 6.00 6.00 6.00 6.00 Cetylethylhexanoate 3.00 3.00 3.00 3.00 3.00 Ethylhexylmethoxycintamate 7.35 7.35 7.35 7.35 7.35 Distearyldimonium hectorite 1.00 1.00 1.00 1.00 1.00 Distearyldimonium chloride 0.20 0.20 0.20 0.20 0.20 Mystic Acid 1.00 - - - - Palmitic Acid - 1.00 - - - Stearic acid - - 1.00 - - Isostearic acid - - - 1.00 - Behenic Acid - - - - 1.00 Cyclopentasiloxane 20.00 20.00 20.00 20.00 20.00 Sorbitan Sesquioleate 1.00 1.00 1.00 1.00 1.00 Fiji-10 dimethicone 2.50 2.50 2.50 2.50 2.50 Potassium hydroxide 0.20 0.20 0.20 0.20 0.20 Spices 0.20 0.20 0.20 0.20 0.20

<Test Example>

The UVB blocking index, water resistance, and washability of the compositions prepared in Examples 1-5 and Comparative Example 1 were measured. Detailed evaluation methods and results are as follows.

<Test Example 1> Evaluation of UV B Block Index (SPF) of UV Cream

According to the KFDA 'functional cosmetic standards and test methods' according to the 'ultraviolet ray blocking functional test method' was measured UV B blocking index (SPF) for the composition of Comparative Example 1 and Example 1-5. Samples were applied to a transpore tape to a level of 2 mg / cm ² , dried for 15 minutes, and measured with an SPF 290 analyzer.

sample Comparative Example 1 Example 1 Example 2 Example 3 Example 4 Example 5 in vitro SPF 37.02
± 2.54 36.56
± 3.32 39.16
± 4.18 37.22
± 3.38 38.78
± 1.62 36.12
± 4.34

Test Example 2 Evaluation of Water Resistance of UV Protection Cream

According to the composition of Comparative Examples 1 and 1-5, according to the UV-blocking functional test method in the KFDA 'Test method of water resistance UV protection index guidelines' and 'Functional cosmetic standards and test methods' of KFDA notice. Water resistance was measured.

sample Comparative Example 1 Example 1 Example 2 Example 3 Example 4 Example 5 Water resistance ratio
Confidence interval (%) 68.2 71.4 65.9 70.3 67.2 68.5

<Test Example 3> Cleansing evaluation of the sunscreen cream

In accordance with the 'Ultraviolet blocking functional test method' among the 'Functional cosmetic standards and test methods' announced by KFDA by changing the water to 5% soap solution in the water immersion step in the KFDA 'Measurement Guidelines for Water Resistance UV Protection Index' The washability against the composition of 1-5 was measured.

sample Comparative Example 1 Example 1 Example 2 Example 3 Example 4 Example 5 Cleansing ratio
Confidence interval (%) 64.0 31.2 25.4 42.8 22.6 38.4

<Interpretation of Results>

As shown in Table 3-5, the UV B blocking indexes of Comparative Example 1 and Example 1-5 were similar to 36.12 to 39.16, and the water resistance ratio confidence interval was 65.9 to 71.4, showing sustained water resistance to 50 or more. However, in the facial cleansing test using a 5% aqueous solution of soap, Example 1-5 containing fatty acids showed a significantly lower face wash ratio than Comparative Example 1, which shows that the face wash was improved.

Therefore, the water-in-oil type sunscreen cosmetic composition of the present invention exhibits sustained water resistance and at the same time is excellent in washing with soap and can effectively block ultraviolet rays.

Claims (6)

fatty acid; And a water-in-oil cosmetic composition with improved washability characterized in that it comprises a nonionic surfactant. The cosmetic composition according to claim 1, wherein the cosmetic composition contains a sunscreen ingredient. According to claim 1, wherein the content of the fatty acid is a cosmetic composition, characterized in that 0.1 to 10% by weight based on the total weight of the cosmetic composition. The cosmetic composition according to claim 1, wherein the fatty acid has 8 to 24 carbon atoms. The method of claim 1, wherein the nonionic surfactant is polyoxyethylene stearyl ether, polyoxyethylene oleyl ether, polyoxyethylene octyldodecyl ethylene stearyl ether, polyoxyethylene cetyl ether, polyoxyethylene Nonylphenyl ether, polyoxyethylene octylphenyl ether, polyoxyethylene oleate, polyoxyethylene stearate, polyoxyethylene sorbitanate, polyoxyethylene sorbitan stearate, polyoxyethylene sorbitan laurate, polyoxy Ethylene sorbitan sesquioleate, polyoxyethylene sorbitan palmitate, polyoxyethylene sorbitan trioleate, polyoxyethylene glyceryl stearate, polyoxyethylene glyceryl isostearate, dioctyldodecylalauryl glutamate, di Octyldodeces-2 lauryl glutamate, dioctyl dodeces-5 lauryl glutamate, polyoxyethylene hydrogenate Castor oil fish isoisostearate, polyoxyethylene hydrogenated castor oil monostearate, polyglyceryl-2-polyhydroxystearate, polyglyceryl-3-diisostearate, sorbitan stearate and poly Cosmetic composition, characterized in that any one or more selected from the group consisting of oxyethylene dimethicone. According to claim 1, wherein the content of the nonionic surfactant is a cosmetic composition, characterized in that 0.1 to 10% by weight based on the total weight of the cosmetic composition.