KR20170054238A - UV protecting cosmetic compositions of O/W type having excellent water resistant property - Google Patents

Abstract

The present invention relates to an oil-in-water type UV protecting cosmetic composition having excellent water resistance. More specifically, the present invention relates to a cosmetic composition and a manufacturing method thereof in order to solve the problems of syneresis for the composition during a manufacturing process when a massive amount of a water-in-oil type emulsifier is used for improving the water resistance of an oil-in-water formulation. The oil-in-water type UV protecting cosmetic composition of the present invention has remarkably superior usability, UV blocking effect, water resistance, and formulation stability.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a UV-protecting cosmetic composition having excellent water resistance,

The present invention relates to a cosmetic composition for underwater type ultraviolet ray shielding excellent in water resistance. More particularly, the present invention is directed to a cosmetic composition for improving the water resistance of a water-in-oil type formulation, and a cosmetic composition for improving the water resistance, .

Recently, the ozone layer is destroyed due to environmental pollution, and exposure to ultraviolet rays is deepening. Such ultraviolet rays are a main cause of causing erythema, edema, freckles or skin cancer in the skin. Accordingly, there has recently been a demand for development of a product that protects skin from ultraviolet rays. Particularly, as the life becomes more and more, the demand for protecting the skin from the ultraviolet rays is increasing, and the demand for protecting the skin from ultraviolet rays is increasing as the leisure activity population such as skiing, golfing or bathing water is increased. Research is underway.

In general, ultraviolet rays are divided into three regions according to wavelength, ultraviolet C (UV-C) at a wavelength of 200-290 nm, ultraviolet B (UV-B) at a wavelength of 290-320 nm, The wavelength is classified as ultraviolet A (UV-A). UV-C passes through the ozone layer and disappears without reaching the surface. UV-B penetrates into the epidermis of the skin, causing erythema, freckles and edema. UV-A penetrates the skin's dermis and promotes skin cancer, wrinkles, and melanin formation, leading to skin aging and skin irritation.

Long-wavelength ultraviolet (UV-A) has been identified as the target of the boundary by promoting skin aging by protein denaturation, capillary expansion or nucleic acid (DNA) destruction in the dermis. On the other hand, the medium-wave ultraviolet (UV-B), which is mostly absorbed in the epidermis of the skin, is called harmful ultraviolet rays because it rapidly acts on the epidermis and burns. The long wavelength ultraviolet rays reach the skin all year round, but because they do not have any subjective symptoms, the skin becomes old without knowing oneself.

As the risk of exposure to sunlight became known, public interest in UV protection products increased, and accordingly, products with various sun protection factor (SPF) and protection grade of UVA (PA) Is being released.

Ultraviolet (UV) blocking cosmetics can be classified into oil in water (O / W) type emulsion type UV screening cosmetics and water in oil (W / O) type UV screening cosmetics according to the manufacturing method of product. The UV-blocking cosmetic for water-in-oil type is resistant to perspiration and water and lasts for a long time. However, it is not easily erased when cleansing due to its characteristics, and feeling of use is heavy and frustrating. On the other hand, the cosmetic for ultraviolet rays of the underwater type is easy to use because it is moist and light feeling, but it can be easily removed by sweat and water, which is disadvantageous in that water resistance and persistence are poor.

Water resistance and durability in color tones are important quality attributes for users. Even if they are good at first feeling, users' satisfaction is degraded if water resistance and durability are poor. Of the cosmetic compositions for protecting against UV rays in the water-in-oil (O / W) formulations, water-in-oil type formulations having high water resistance and high UV blocking ability of SPF 50+ and PA +++ have not yet been developed.

Techniques for improving the water resistance of an underwater type (O / W) cosmetic composition using a water in oil (W / O) emulsifier are already known in the art. However, when a large amount of water-in-oil type (W / O) emulsifier is used in an underwater type (O / W) cosmetic composition, Therefore, it is necessary to develop a cosmetic composition which is excellent in feeling of use and ultraviolet ray blocking ability and is excellent in formulation stability because it is not easily removed by sweat or water, and is resistant to water and water,

The object of the present invention is to provide a cosmetic composition for underwater type ultraviolet ray shielding which has a high ultraviolet shielding ability and is excellent in water resistance and formulation stability.

The present invention provides a cosmetic composition for ultraviolet ray shielding comprising a coating agent and a water-in-oil type (W / O) emulsifier. Preferably, the cosmetic composition may be prepared in water type (O / W). The cosmetic composition for blocking ultraviolet rays has excellent water resistance, which is not easily erased even when sweat or water.

The present inventors have made intensive researches to solve the drawbacks of sweat of water-soluble cosmetic composition for underwater type (O / W) ultraviolet ray shielding or weak water-resistant cosmetic composition. (W / O) emulsifier together with the water-in-oil type cosmetic composition of the present invention, the ultraviolet screening agent is stably captured (FIG. 5) and the water-in-oil type (W / O) emulsifier is converted into a water-in-oil type (O / W) cosmetic with water-in-oil type (W / O) (FIG. 4) so that the cosmetic composition is not easily removed by sweat or water, . Further, it has been found that water resistance is fully exhibited through the combination of the above components, and that an appropriate amount of water-in-oil (W / O) emulsifier is used, .

In the present invention, the coating agent is used for improving the water resistance of the cosmetic composition by capturing the ultraviolet screening agent and the powder by applying the coating agent on the skin, and the coating agent is an acrylate-based copolymer, a vinylpyrrolidone- And the like can be used. The acrylate-based copolymer may be an acrylate / acrylamide copolymer, an acrylate / acetoacetoxyethyl methacrylate copolymer, an acrylate / C10-30 alkyl acrylate crosslinked polymer, an acrylate / C12-22 alkyl methacrylate (VA) copolymer and an arylate / polyvinylpyrrolidone (PVP) copolymer, may be used as the binder resin.

The vinylpyrrolidone-based copolymer may be a copolymer of vinylpyrrolidone / vinyl acetate, a copolymer of vinylpyrrolidone / hexadecene, a copolymer of vinylpyrrolidone / dimethylaminoethyl methacrylate, a vinylpyrrolidone / A triacrylate copolymer, a vinyl pyrrolidone copolymer, and a copolymer of vinyl pyrrolidone / eicosene, and the like may be used. Preferably, the vinylpyrrolidone-based copolymer may be a vinylpyrrolidone / hexadecene copolymer.

In the present invention, the coating agent may be contained in an amount of 0.1 to 20% by weight, preferably 0.5 to 10% by weight, more preferably 1 to 5% by weight based on the total weight of the composition. If the content of the coating agent is less than 0.1% by weight, the effect of improving the water resistance of the cosmetic composition for ultraviolet ray shielding is not expected. If it exceeds 20% by weight, absorption is slow and sticky.

In the present invention, the water-in-oil (W / O) emulsifier is used to convert the cosmetic composition from an underwater type to a water-in-oil type while water of a water phase is evaporated after applying the skin, thereby improving water resistance. As the water-in-oil (W / O) emulsifier, a lipophilic nonionic surfactant, a cationic surfactant, or a mixture thereof may be used, and glyceryl stearate, sorbitan sesquioleate, sorbitan olivate, 10 dimethicone, lauryl pyridine-9 polydimethylsiloxy ethyl dimethicone, stearic acid, distearyl dimonium chloride, and cetylpiperazine / piperidine-10/1 dimethicone. May be used, but the present invention is not limited thereto. Preferably, the water-in-oil (W / O) emulsifier may be polyglyceryl-2 dipolyhydroxystearate. Preferably, the water-in-oil (W / O) emulsifier has an HLB range of 3 to 9, and in this case, the cosmetic composition is more excellent in improving the water resistance.

In the present invention, the water-in-oil (W / O) emulsifier may be contained in an amount of 0.1 to 10% by weight, preferably 0.2 to 7% by weight, more preferably 0.3 to 3% by weight based on the total weight of the composition. When the water-in-oil (W / O) emulsifier is less than 0.1% by weight, the effect of improving the water resistance of the water-in-oil type is small, There arises a problem that the phase occurs during the production of the composition.

In the present invention, the weight ratio of the encapsulating agent to the water-in-oil (W / O) emulsifier is 0.5: 1 to 10: 1, preferably 1: 1 to 7: 1, more preferably 3: 1 to 5: (W / O) emulsifier, it is possible to improve the water resistance in skin application due to the synergistic effect of the two ingredients Can be excellently demonstrated.

In the present invention, the ultraviolet screening cosmetic composition may include an ultraviolet screening agent, an organic ultraviolet screening agent, an inorganic ultraviolet screening agent, or a mixture thereof.

The organic ultraviolet screening agent may be at least one selected from the group consisting of ethylhexylmethoxycinnamate, ethylhexylsalicylate, bis-ethylhexyloxyphenol methoxyphenyltriazine, diethylaminohydroxybenzoylhexylbenzoate, octocrylene, butylmethoxydibenzoylmethane, Methylbenzylidene-2-methylbenzylidenephosphonic acid, 2-hydroxy-4-methoxybenzophenonesulfonic acid and 3,4-methylbenzylidene-camphor, and the like. Any one or more may be included.

The inorganic ultraviolet screening agent may include titanium dioxide, zinc oxide, a mixture thereof, and the like. Titanium dioxide is a physical UV blocking agent that has UV-A and UV-B scattering effect. It has a high effect of blocking ultraviolet rays and suppresses sweating, giving a transparency to skin. Zinc oxide is a physical UV blocking agent with UV-A and UV-B scattering effects. It is not toxic, and has high light resistance, high heat resistance and heat resistance. It forms a protective film against sunlight and other stimuli. It has antibacterial action.

In the present invention, the cosmetic composition may contain 1 to 20% by weight, preferably 3 to 15% by weight, more preferably 5 to 12% by weight, of the ultraviolet screening agent based on the total weight of the composition. If the UV blocking agent is less than 1% by weight, the ultraviolet blocking effect is insignificant. If the UV blocking agent is more than 20% by weight, the feeling of use may be deteriorated or if the organic UV blocking agent is used excessively, skin irritation may occur.

The ultraviolet screening cosmetic composition of the present invention may be SPF 30 or more, preferably SPF 30 to 70, and may be PA ++, preferably PA +++. Since the coating agent and the water-in-oil type emulsifier are contained together, the coating agent stably captures the ultraviolet screening agent and the water-in-oil type emulsifier steams the water-in-water type into the water-in-oil type during skin application, It is possible to achieve a high ultraviolet shielding ability.

The present invention also relates to a composition comprising 0.1 to 20% by weight, based on the total weight of the composition, of an acrylate-based copolymer, a vinylpyrrolidone-based copolymer or a mixture thereof; And 0.1 to 10% by weight of a lipophilic nonionic surfactant, a cationic surfactant, or a mixture thereof, wherein the acrylate-based copolymer, the vinylpyrrolidone-based copolymer, or a mixture thereof: The weight ratio of active agent, cationic surfactant or mixture thereof is in the range of 0.5: 1 to 10: 1 (acrylate-based copolymer, vinylpyrrolidone-based copolymer or mixture thereof: lipophilic nonionic surfactant, cationic (O / W) ultraviolet ray shielding cosmetic composition, which is a surfactant, a surfactant, or a mixture thereof. As described above, the ultraviolet barrier cosmetic composition comprising a specific combination of components in a weight ratio is remarkably excellent in water resistance and formulation stability.

In addition to the above components, the cosmetic composition for protecting against ultraviolet rays according to the present invention may contain, in addition to the above components, an oil component, a dispersant, a powder, an emulsifier, a moisturizer, a thickener, a powder, It may be prepared by a conventional method by mixing appropriate amounts of components such as a polymer, a synthetic polymer, a saccharide, an antioxidant, a buffer, various extracts, a stabilizer, a preservative, a coloring matter or a perfume. The oil component may be a silicone oil, a vegetable oil, an animal oil, a synthetic ester, or a hydrocarbon. The dispersant may be an emulsifier of ethanol, dimethicone copolyols, glycerin, And polyhydric alcohols such as butylene glycol and propylene glycol.

In addition, the cosmetic composition for protecting ultraviolet rays according to the present invention can be used as a foundation, a solution, an ointment, a cream, a foam, a nutritional lotion, a softening water, a pack, a soft water, an emulsion, a makeup base, But are not limited to, solutions, pastes, gels, lotions, powders, oils, emulsion foundations, patches or sprays.

(S1) heating and dissolving a coating agent, a water-in-oil (W / O) emulsifier and an ultraviolet screening agent in an oil phase, and dispersing the resulting mixture in a homogenizer; (s2) by adding the oily phase to the upper part of the water and emulsifying the oily phase, and a method for producing the cosmetic composition for underwater type (O / W) ultraviolet ray shielding. The steps (s1) and (s2) may be performed by heating at a temperature of 60 to 80 캜. The cosmetic composition for underwater type (O / W) ultraviolet rays produced through the above-described production method has excellent ultraviolet shielding effect by keeping the ultraviolet screening agent stably during application of the skin, and is remarkably excellent in water resistance and formulation stability.

The cosmetic composition for underwater type (O / W) ultraviolet rays of the present invention is superior in feel to use in comparison with a water-in-oil (W / O) cosmetic composition and overcomes the drawbacks of sweat and water of conventional underwater type cosmetic formulations, This is remarkable.

In addition, the cosmetic composition for an underwater type (O / W) ultraviolet screening of the present invention contains an appropriate amount of a water-in-oil (W / O) emulsifier to prevent undesirable formation of a cosmetic composition, It improves the water resistance by allowing the water phase to flow from the water-in-water type to the water-in-water type.

In addition, the cosmetic composition for underwater type (O / W) ultraviolet ray shielding of the present invention captures the ultraviolet screening agent when the skin is applied and stably maintains the ultraviolet screening agent through the phase due to the water-in-oil (W / Excellent blocking effect.

Fig. 1 shows the results of water resistance test after coating the composition of Example 1, Comparative Example 1 and Comparative Example 2 on a slide glass.
Fig. 2 is a diagram showing a standard colorimeter in three dimensions.
FIG. 3 is a graph showing the ratio of L (lightness) value of the composition of Example 1, Comparative Example 1 and Comparative Example 2 measured by using a colorimeter before washing with water.
Figs. 4 and 5 are diagrams showing the principle of water resistance of two raw materials (1) water-in-oil type (w / o) emulsifier and (2)

Hereinafter, embodiments of the present invention will be described in detail to facilitate understanding of the present invention. However, the embodiments 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 following embodiments. Embodiments of the invention are provided to more fully describe the present invention to those skilled in the art.

Example  And Comparative Example  Preparation of composition

Comparative Example 1 Comparative Example 2 Example 1 One Purified water To 100 To 100 To 100 2 Xanthan gum 1,000 1,000 1,000 3 EDTA 2NA 0.020 0.020 0.020 4 Glycerol 3.000 3.000 3.000 5 1,2-hexanediol 2.000 2.000 2.000 6 Polyglyceryl-2 dipolyhydroxystearate - - 0.5000 7 Vinylpyrrolidone / hexadecene copolymer - 2.000 2.000 8 Dimethicone 10,000 10,000 10,000 9 Ethylhexyl methoxy cinnamate 7.000 7.000 7.000 10 Titanium dioxide 1,000 1,000 1,000 11 Iron oxide 0.1 0.1 0.1 Water resistance (in vitro) - see below ~ 10% ~ 40% ~ 70%

 [Manufacturing method]

The oil phase parts (raw materials 6 to 11) were dispersed by heating in a separate container at 70 ° C by using the weight% shown in Table 1, using a homogenizer. After the water phase part (raw materials 1 to 5) is dissolved by heating at 70 占 폚, the oil phase part is slowly added to the water phase part and emulsified at 70 占 폚. Finally, the composition is filled into an airtight container and cooled to room temperature using a cooler.

[Evaluation method of water resistance] - in Vitro ( In vitro  Experiment)

The composition was applied to Vitro Skin at 2 mg / cm ² , and the ultraviolet shielding ability (SPFwet) after immersion was measured by the ultraviolet shielding ability (SPFdry) in dry state and the ultraviolet shielding agent was lost by immersion . Next, SPFdry and SPFwet were compared with each other and water resistance was determined according to the following equation (1). The results of this in vitro test are shown in Table 1 above.

[Equation 1]

(Reference: Korean Patent Laid-Open Publication No. 2006-0038518, SPF measurement system and in-vitro water resistance SPF measurement method of ultraviolet screening agent / SPF measurement method / IFSCC published paper, Ahn S, Yang H, Lee H, Moon S, Chang I , Alternative evaluation method in vitro for water resistant effect of sunscreen products, Skin Res. Technol. 2008 May; 14 (2): 187-91.)

[Evaluation method of water resistance] - In vivo ( In vivo  Experiment)

And then after application of the composition of Example 1 on the human body and dried to measure the SPF, and repeating the retrieving and drying was measured twice _in SPF. The above-mentioned intake and drying were carried out in the order of 20 minutes, 20 minutes of rest (natural drying, no use of towel), 20 minutes of arrival, and 15 minutes of natural drying.

Then, as compared to the _{inside of} the SPF SPF and water resistance was determined according to the equation (2). It is judged that there is a water resistance when the water resistance ratio of the following subjects is 50% or more.

&Quot; (2) "

Test subject water resistance ratio (%) =

Product SPF (mean) SPF (labeled) Water resistance Example 1 Before immersion 58 ↑ 50 After immersion 33.7 ↑ Yes (57-58%)

As a result of the in vivo test, it can be said that Example 1 has a waterproof function because the water resistance is 50% or more.

Experimental Example  1: Water resistance test - Visual test

The composition of Example 1, Comparative Example 1 and Comparative Example 2 was uniformly coated on a slide glass at 100 m, and then dried for 15 minutes. Then, the slide glass was immersed in a container filled with water, and the degree of make-up was compared.

Fig. 1 shows a photograph of a comparative experiment of the degree of clearing the makeup after immersion in water. (a) After 0h (b) After 1h (c) After 3h (d) After 30h.

As a result of visually comparing the extent of make-up remaining, Example 1> Comparative Example 2> Comparative Example 1 And the composition of Example 1 including both the encapsulating agent and the water-in-oil type (w / o) emulsifier showed the best water resistance.

Experimental Example  2: Water resistance test - Color difference meter  Test

The brightness values before and after the wash off were compared with the color difference meter (FIG. 2) used for object color measurement.

 - L: Indicates brightness (brightness).

 - a: The greater the positive (+) value, the greater the red, minus (-) value.

 - b: Plus (+) The higher the value, the higher the yellow, the minus (-) value is the blue

The higher the L value ratio is, the brighter the lightness is, so there is a lot of makeup remaining after the wash off. Accordingly, the results shown in Table 3 and FIG. 3 show that the cosmetic composition of Example 1 has the highest L value ratio before washing with water, and thus has the highest water resistance.

Claims (14)

A coating agent and a water-in-oil (W / O) emulsifier. The cosmetic composition according to claim 1, wherein the cosmetic composition is an underwater type (O / W). The cosmetic composition according to claim 1, wherein the coating agent is an acrylate-based copolymer, a vinylpyrrolidone-based copolymer, or a mixture thereof. The cosmetic composition according to claim 1, wherein the water-in-oil (W / O) emulsifier is a lipophilic nonionic surfactant, a cationic surfactant, or a mixture thereof. The cosmetic composition according to claim 4, wherein the water-in-oil (W / O) emulsifier has an HLB range of 3 to 9. The cosmetic composition for protecting ultraviolet rays according to claim 1, wherein the coating agent is 0.1 to 20% by weight based on the total weight of the composition. The cosmetic composition according to claim 1, wherein the water-in-oil (W / O) emulsifier is 0.1 to 10% by weight based on the total weight of the composition. The cosmetic composition according to claim 1, wherein the weight ratio of the coating agent: water-in-oil (W / O) emulsifier is 0.5: 1 to 10: 1 (coating agent: water-in-oil type emulsifier). The cosmetic composition according to claim 1, wherein the cosmetic composition has improved water resistance. The cosmetic composition for protecting ultraviolet rays according to claim 1, wherein the cosmetic composition does not form a phase during production. The cosmetic composition according to claim 1, wherein the cosmetic composition comprises an organic ultraviolet screening agent, an inorganic ultraviolet screening agent, or a mixture thereof. The cosmetic composition according to claim 1, wherein the cosmetic composition has an SPF of 30 or more and PA ++. 0.1 to 20% by weight, based on the total weight of the composition, of an acrylate-based copolymer, a vinylpyrrolidone-based copolymer, or a mixture thereof; And 0.1 to 10% by weight of a lipophilic nonionic surfactant, a cationic surfactant, or a mixture thereof,
The weight ratio of the lipophilic nonionic surfactant, the cationic surfactant or a mixture thereof is in the range of 0.5: 1 to 10: 1 (the acrylate-based copolymer , A vinyl pyrrolidone type copolymer, or a mixture thereof: a lipophilic nonionic surfactant, a cationic surfactant, or a mixture thereof). The cosmetic composition according to claim 1, wherein the cosmetic composition is at least one selected from the group consisting of an oil component, a dispersant, a powder, an emulsifier, a moisturizer, a thickener, a powder, an alcohol, a natural polymer, a synthetic polymer, a saccharide, an antioxidant, A cosmetic composition, a cosmetic composition, and a perfume composition.

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