KR20120039205A - Solid cosmetic composition of oil in water for blocking ultraviolet rays - Google Patents

Abstract

PURPOSE: A cosmetic composition containing sodium alkyl groups is provided to stabilize inorganic protector and to enhance UV protection efficiency. CONSTITUTION: A cosmetic composition for UV protection contains solidifying agent with a sodium alkyl group and contains solidified organic UV protector, inorganic UV protector, or mixture thereof. The solidifying agent is sodium stearate(C18:0), sodium laurate(C12:0), sodium tridecylate(C13:0), sodium myristate(C14:0), sodium pentadecylate(C15:0), sodium palmitate(C16:0), sodium nanadecylate(C19:0), or sodium tricosylate(C23:0). The inorganic UV protector is titanium dioxide or zinc oxide.

Description

Solid cosmetic composition of oil in water for blocking ultraviolet rays}

The present invention relates to a sunscreen cosmetic composition of the oil-in-water solidification formulation containing a sodium alkyl group as a solidifying agent, comprising a stabilized inorganic sunscreen and organic sunscreen to improve the dispersion stability and sunscreen cosmetic composition It is about.

Ultraviolet rays irradiated from sunlight are a major cause of erythema, edema, freckles, and skin cancer. Recently, many studies have been conducted on various skin diseases caused by ultraviolet rays.

In general, ultraviolet rays are classified into UV-C at 240-290 nm, UV-B at 290-320 nm, and UV-A at 320-400 nm. UV-C passes through the ozone layer and disappears without reaching the surface. UV-B penetrates to the skin's epidermis, causing erythema, freckles, and edema. UV-A is well known to induce skin aging and skin irritation such as penetrating the dermis of the skin and promoting skin cancer, wrinkles and melanin formation.

The public's interest in the UV protection product market has increased considerably, and as a result, UV protection products having various types of UVB UV Protection Index (SPF) and UVA UV Protection Index (PA) are on the market. Types of sunscreen products are generally classified into creams, lotions, cakes, sticks, powders, etc. according to their final shape or viscosity, and W / O type (water in oil) and O / W type in the composition of the composition It can be classified into oil type (oil in water), water dispersion, oil dispersion, powder, and separate type.

Of these, the present invention relates to an oil-in-water solidifying formulation, which is advantageous in that it is easy to carry and can be applied by directly contacting the skin without using a hand or a tool.

In more detail, the solidifying formulation may be classified into an oil phase containing no water, an oil phase containing no oils, and an emulsion phase containing water and oils.

Among them, the present invention is characterized in that the oil-in-water formulating agent comprises a sodium alkyl group in the oil-in-water emulsion, characterized in that the inorganic UV blocker and the organic UV blocker is stabilized in order to impart UV blocking effect.

Of course, even existing patents mention that sodium stearate in the alkyl alkyl group contains a raw material having a sunscreen and absorption effect in a solid formulation (US Patent No. 6062815, US Patent 4268498). No., U.S. Patent No. 4322400, Japanese Patent Application Laid-Open No. 57-109712, Japanese Patent Application Laid-Open No. 2004-137212), and there is no specific reference to the method for stabilizing the inorganic UV blocker or the organic UV blocker in the formulation. Technical realization is excluded.

The present invention relates to a formulation that overcomes technical difficulties in dispersing and stabilizing an inorganic sunscreen and an organic sunscreen and enhances the sunscreen effect.

Thus, the present inventors have found that the dispersion stability and UV protection effect are excellent when the inorganic sunscreen agent and the organic sunscreen agent are stabilized in the oil-in-water solidified formulation using a sodium alkyl group as a solidifying agent, and completed the present invention.

Therefore, an object of the present invention is to provide a solidifying sunscreen cosmetic composition excellent in dispersion stability and sunscreen effect by stabilizing the inorganic sunscreen and organic sunscreen in the formulation.

In order to achieve the above object, the present invention is a cosmetic composition for sunscreen of the oil-in-water (o / w emulsion) solidifying formulation comprising a solidifying agent having a sodium alkyl group, stabilizing organic sunscreens, inorganic sunscreens or mixtures thereof It provides a cosmetic composition for blocking UV rays.

The oil-in-water solidifying sunscreen cosmetic composition made according to the present invention contains a stabilized organic sunscreen, inorganic sunscreen or a mixture thereof to have a high dispersion stability and excellent UV blocking effect, when applied to the skin by moisture Excellent skin cooling effect.

The present invention relates to a sunscreen cosmetic composition of an oil-in-water (o / w emulsion) solidifying formulation containing a solidifying agent having a sodium alkyl group, comprising: stabilizing an organic sunscreen, an inorganic sunscreen or a mixture thereof. To provide a composition.

Hereinafter, the present invention will be described more specifically.

As the core formulation agent used in the present invention, a solidifying agent having a sodium alkyl group may be contained in an amount of 1 to 20% by weight based on the total weight of the composition, thereby forming a cake or stick solidifying formulation. This is because the solidification effect is insignificant at less than 1% by weight, and over 20% by weight is too hard to feel rough when applied to the skin.

The solidifying agent having a sodium alkyl group of the present invention is characterized in that the alkyl group has 12 to 24 carbon atoms, sodium stearate (C18: 0), sodium laurate (C12: 0), sodium tridecylate (C13: 0) Sodium myristate (C14: 0), sodium pentadecylate (C15: 0), sodium palmitate (C16: 0), sodium margarate (C17: 0), sodium nonadesylate (C19: 0), sodium Arachidylate (C20: 0), sodium henecosylate (C21: 0), sodium behenate (C22: 0), sodium tricosylate (C23: 0), sodium lignoserate (C24: 0), In addition, in the form of unsaturated hydrocarbons, sodium and unsaturated hydrocarbons are ester-bonded with myristoleic acid (C14: 1) and sodium in the form of esters in which sodium is bonded instead of hydrogen at the ends of unsaturated hydrocarbons, palmitoleic (Palmitoleic) ester bond of acid) (C16: 1) with sodium, ester bond of oleic acid (C18: 1) with sodium, linoleic a Ester bonds of cid) (C18: 2) and sodium, ester bonds of Erucic acid (C22: 1) and sodium, and the like can be used in the present invention.

The oil-in-water solidifying cosmetic composition of the present invention is characterized in that the hardness is 200 to 900 when the penetration hardness is measured by a sun rheometer (SUN RHEOMETER) CR 500 device (5 mm pin). However, the hardness unit here is N (Newton) / 1000. If the hardness of penetration is less than 200, the formulation will be too soft and loose when applied to the skin, and if it exceeds 900, the hardness of the formulation will be excessively high, making it too hard to be soft and rough. Not desirable

The composition of the present invention may use an inorganic sunscreen, an organic sunscreen or a mixture thereof, depending on the characteristics of the formulation, the inorganic sunscreen, an organic sunscreen or a mixture thereof is contained in 0.5 to 40% by weight relative to the total weight of the composition do. It is less than 0.5% by weight of the UV protection effect is insignificant, in excess of 40% by weight of the excess of organic sunscreen, the stability of the emulsion can be reduced, the moisture and cooling effect on the skin, which is a characteristic of the formulation can be reduced, excess It is not preferable because the inorganic UV blocker may cause cloudiness and a rough feeling of use.

The organic sunscreen component of the present invention is glyceryl pava, drometrizole trisiloxane, drometrizole, digaloyl trioleate, disodium phenyldibenzimidazole tetraselonate, die-methoxycinnamate, low Mixture of hand and dihydroxyacetone, 4-methylbenzylidene camphor, menthyl anthranilate, benzophenone 3, benzophenone 4, benzophenone 8, butylmethoxydibenzoylmethane, bisethylhexyloxyphenol methoxyphenyl triazine, Synoxate, Ethyl Dihydroxypropyl Pava, Octocrylene, Ethyl Hexyl Dimethyl Pava, Ethyl Hexylmethoxy Cinnamate, Ethyl Hexyl Salicylate, Ethyl Hexyl Triazone, Isoamyl p-methoxycinnamate, TEI-Sally Silate, paraaminobenzoic acid, phenylbenzimidazolesulphonic acid, homosalate, diethylhexylbutamidotrizone, methylenebis-benzotriazolyltetramethylbutylphenol, terephthal Lideni camphor sulfonic acid and salts thereof, polysilicon-15, benzophenone 1, benzophenone 2, benzophenone 5, benzophenone 6, benzophenone 9, 3-benzylidene camphor, benzylidene camphor sulfonic acid, butylparaamino Benzoic acid, Camphor Benzalkonium Methosulfate, Diethylhexyl Butamido Triazone, Diisopropyl Methyl Cinnamate, Ethyl Diisopropylcinnamate ), 2-Ethylhexyl dimethoxybenzylidene dioxoimidazolidine propionate, Ethyl PABA, Felic Acid, Glyceryl Ethyl Glyceryl Ethylhexanoate Dimethoxycinnamate, Isopentyl Trimethoxycinnamate Trisiloxane, Isopentyl Trimethoxycinnamate Trisiloxane Isopropyl Methoxycinnamate, Isopropylbenzyl Salicylate, PIG-25 PABA, Polyacrylamidomethyl Benzylidene Camphor, Potassium Phenylbenzi At least one member selected from the group consisting of imidazole sulfonate (Potassium Phenylbenzimidazole Sulfonate), sodium phenylbenzimidazole sulfonate and thi-phenylbenzimidazole sulfonate (TEA-Phenylbenzimidazole Sulfonate).

In the case of the water-soluble organic sunscreen, it is incorporated into an aqueous phase at an appropriate pH condition, that is, 8.3 to 9.5, wherein the pH is sodium citrate, lactic acid, sodium lactate, salicylic acid, triethanolamine, carbomer, aminomethyl Propanol, potassium phosphate, potassium chlorite, glycolic acid, tartaric acid and the like can be controlled by gradually introducing the aqueous phase while measuring pH. In addition, in the case of oil-soluble organic sunscreen, it is prepared and used as an emulsion using an oil-in-water (o / w) surfactant. Emulsions of oil-soluble organic sunscreens can be prepared according to methods conventional in the art.

The inorganic sunscreen of the present invention is titanium dioxide or zinc oxide, the average particle size of which is 10 nm to 100 nm. The average particle size of the inorganic sunscreen is considered to be excellent in blocking the UV rays, but the smaller the size, the better the UV protection effect. Agglomeration may occur, and when applied to the skin, cloudiness may increase, UV protection may decrease, and precipitation may occur in the formulation.

The outermost surface of the inorganic sunscreen of the present invention is characterized by coating with silica having excellent water dispersibility. In this case, the silica is characterized in that the coating at 1 to 40% by weight based on the total weight of the inorganic sunscreen and the coating material. When the content of silica is less than 1% by weight, the water dispersibility is lowered, and when the content of the silica is more than 40% by weight, the content of the inorganic sunscreen is too low, which lowers the UV protective effect.

In addition, aluminum oxide may be mixed with the silica and used. At this time, the aluminum oxide is blended for the purpose of dispersion effect and photocatalyst protection effect, when the content of silica is more than 20% by weight, the dispersion effect and the photocatalyst defense effect is increased, thereby controlling the amount of aluminum oxide. Aluminum oxide is preferably used in an amount of 1 to 20% by weight based on the total weight of the inorganic sunscreen and the coating material. If it is less than 1% by weight, the aluminum oxide is insufficient in the dispersion effect and the photocatalytic effect. Even if the surface of the sunscreen is sufficiently covered, the excess aluminum oxide itself may cause a catalytic reaction, and the content of the inorganic sunscreen is relatively low, thereby reducing the sunscreen effect.

In addition, the inorganic sunscreen applied in the present invention can be both in powder form and dispersed in water phase.

In addition, in the present invention, the pH range is set to 8.3 to 9.5, more preferably 8.5 to 9.0 because it is necessary to control the appropriate pH range that can be formulated without irritating the skin. If the pH is less than 8.3, the sodium alkyl group is converted to fatty acid due to the low pH, and if it exceeds 9.5, skin irritation occurs, especially in the case of the leave on type rather than the wash off type. Skin irritation is more serious. In order to adjust the pH, it is desirable to adjust by adding an appropriate amount of acid, and representative pH adjusting agents can be adjusted with the ingredients in the cosmetic raw material specification or the US CTFA raw material collection.

In addition, the cosmetic composition of the present invention may further contain a preservative, flavor and other additives in addition to the above components.

[Examples 1-3 and Comparative Examples 1-2]

O / W solidified UV protection cosmetic composition according to the present invention was prepared in the composition of Tables 1-2.

division Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 number Raw material name content
(weight%) content
(weight%) content
(weight%) content
(weight%) content
(weight%) ① Purified water to 100 to 100 to 100 to 100 to 100 ② Sodium stearate 6 6 6 6 6 ③ 1,3 butylene glycol 6 6 6 6 6 ④ Phenoxyethanol 0.3 0.3 0.3 0.3 0.3 ⑤ Lactic Acid (Lactic Acid) Quantity Quantity Quantity Quantity Quantity ⑥ Titanium dioxide (titanium dioxide 80% / silica 15% / aluminum oxide 5%)
Average particle size 100 nm or less 10 - 10 - - ⑦ Titanium dioxide
Average particle size 2.5 μm - - - 8 - ⑧ Organic UV Blocker O / W Emulsifying Base - 10 10 - - ⑨ Ethylhexylmethoxycinnamate - - - - 7.5

<Manufacturing Method>

1) The components ① to ⑤ were gradually mixed using a paddle mixer while heating to 70 ° C. or higher.

2) The mixture of 1) was agitated while putting the above components ⑥ to ⑨. At this time, the temperature condition was maintained between 60 ℃ 70 ℃, component ⑧ was used after the preparation according to the organic sunscreen O / W emulsified base production method described below.

3) After the degassed mixture of 2) was degassed, the mixture was poured into a sealed container at 60 ° C. and cooled.

Organic UV Blocker O / W Emulsifying Base number Raw material name content ⑩ Ethylhexylmethoxycinnamate 75 ⑪ Cetearyl Alcohol 2.5 ⑫ Chin type glyceryl stearate 1.5 ⑬ Glyceryl Stearate * Fiji-100 Stearate 1.5 ⑭ Sorbitan stearate One ⑮ Purified water to 100

<Manufacturing method of O / W emulsified base of organic UV blocker>

The components ⑩ ~ ⑭ are added to the beaker at once and heated and dissolved at 80 ° C., and then gradually mixed into the beaker containing the component ⑮ by homomixing for at least 5000 rpm for 5 minutes, uniformly mixed, degassed and cooled and stored for usefulness. An emulsion of organic sunscreen was obtained.

Experimental Example 1 Penetration Hardness, UV Blocking Capacity and Dispersion State

After cooling the O / W solidified UV blocking cosmetic composition prepared according to the above, it was allowed to stand in a thermostat bath at 30 ° C. for 24 hours, and then the penetration hardness was measured. The method of measuring the penetration hardness was read the maximum value at 20 mm penetration using a SUN RHEOMETER CR 500 instrument (5 mm pin).

SPF 290 analyzer (Optometrics Co., USA) was used for the measurement of IN VITRO SPF, and a sample of 2 mg was prepared by attaching a transpore tape (3M, USA) to a prepared cast iron. / Cm 2 was uniformly applied to the tape and allowed to stand for 20 minutes before measurement.

In addition, the dispersion state of the formulation was observed by pushing each layer on a glass plate. In more detail, after applying the formulation as thin as possible to the glass plate with a spatula, apply it evenly enough to be seen on the other side of the glass, and then check whether white spots of visible size are visible. It can be judged as relatively bad.

The dispersion state of the formulation is very important when uniformly dispersing UV-protective material into the formulation, and if it is not uniformly dispersed, hardness, UV protection index, usability, etc., are not valuable. You can judge. The experimental results are shown in Table 3 below. X was indicated when a uniform phase could not be made and the penetration hardness and UV protection index could not be determined by sinking to the bottom in the formulation.

Metric Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Penetration Hardness (N / 1000) 550 515 450 X X in vitro SPF blocking index 21.5 13.2 40.8 X X Dispersion State of the Formulation Good Good Good Infrared rays on the lower floor
Blocker precipitation Organic ultraviolet light in the upper layer
FLOATING

As can be seen in Table 3, the cosmetic composition (Examples 1 to 3) of the O / W solidified formulation containing the stabilized sunscreen according to the present invention is good dispersion state of the formulation, high penetration hardness is applied to the skin In addition, the formulation does not have a problem of receding or shedding, and the sunscreen effect was excellent. In particular, it was confirmed that Example 3 containing both the inorganic sunscreen and the organic sunscreen stabilized according to the present invention exhibited the most excellent sunscreen effect.

On the other hand, Comparative Example 1 could not produce a uniform phase by blending titanium dioxide with an average particle size of more than 100 nm without the aqueous dispersion treatment, and showed a result of sinking to the bottom in the formulation. As a result, precipitation occurred on the bottom, resulting in low hardness at the top and very high hardness at the bottom of the formulation. In addition, in Comparative Example 2, the organic sunscreen was not prepared as an emulsified base, but the mixing was not performed in the formulation in which ethylhexylmethoxycinnamate was directly added, resulting in poor dispersion and phase separation.

Experimental Example 2 Skin Temperature Cooling Effect

In order to confirm the skin temperature cooling effect of the O / W solidified cosmetic composition of the present invention was carried out as follows using Examples 1 to 3.

Skin temperature cooling measurements were measured before applying each test substance to the ball through three volunteers, and averaged the temperature difference using a non-contact infrared thermometer 10 seconds after each test product. The results are shown in Table 4 below.

Metric Example 1 Example 2 Example 3 Temperature difference before and after application 2.0 2.0 2.0

As can be seen from the results of Table 4, the cosmetic composition according to the present invention was excellent in the skin temperature cooling effect as a formulation containing a lot of water in nature.

Claims (13)

A sunscreen cosmetic composition of an oil-in-water solidifying formulation comprising a solidifying agent having a sodium alkyl group, comprising: a sunscreen cosmetic composition for stabilizing and containing an organic sunscreen, an inorganic sunscreen, or a mixture thereof. The cosmetic composition for sunscreen according to claim 1, wherein the solidifying agent having a sodium alkyl group is contained in an amount of 1 to 20% by weight based on the total weight of the composition. The method of claim 1, wherein the solidifying agent having a sodium alkyl group is sodium stearate (C18: 0), sodium laurate (C12: 0), sodium tridecylate (C13: 0), sodium myristate (C14: 0), Sodium pentadecylate (C15: 0), sodium palmitate (C16: 0), sodium margarate (C17: 0), sodium nonadesylate (C19: 0), sodium arachidylate (C20: 0), sodium At least one member selected from the group consisting of henecosylate (C21: 0), sodium behenate (C22: 0), sodium tricosylate (C23: 0), and sodium lignoserate (C24: 0) Cosmetic composition for sun protection. The cosmetic composition for sunscreen according to claim 1, wherein the organic sunscreen, inorganic sunscreen or a mixture thereof is contained in an amount of 0.5 to 40% by weight based on the total weight of the composition. The organic sunscreen according to claim 1, wherein the organic sunscreen is glyceryl pava, dromethazole trisiloxane, dromethazole, digaloyl trioleate, disodium phenyldibenzimidazole tetraselonate, die-methoxycinna Mate, a mixture of Lawson and dihydroxyacetone, 4-methylbenzylidene camphor, menthyl anthranilate, benzophenone 3, benzophenone 4, benzophenone 8, butylmethoxydibenzoylmethane, bisethylhexyloxyphenol methoxyphenyl Triazine, Synoxate, Ethyl Dihydroxypropyl Pava, Octocrylene, Ethyl Hexyl Dimethyl Pava, Ethyl Hexyl Methoxycinnamate, Ethyl Hexyl Salicylate, Ethyl Hexyl Triazone, Isoamyl p-methoxycinnamate, Tea Ei-salicylate, paraaminobenzoic acid, phenylbenzimidazolesulfonic acid, homosalate, diethylhexylbutamidotrizone, methylenebis-benzotriazolyltetramethylbutylphenol, te Phthalylidene dicamphor sulfonic acid and salts thereof, polysilicon-15, benzophenone 1, benzophenone 2, benzophenone 5, benzophenone 6, benzophenone 9, 3-benzylidene camphor, benzylidene camphor sulfonic acid, butyl Paraaminobenzoic Acid, Camphor Benzalkonium Methosulfate, Diethylhexyl Butamido Triazone, Diisopropyl Methyl Cinnamate, Ethyl Diisopropyl Cinnamate Ethyl Diisopropylcinnamate, 2-Ethylhexyl dimethoxybenzylidene dioxoimidazolidine propionate, Ethyl PABA, Frulic Acid, Glyceryl Glyceryl Ethylhexanoate Dimethoxycinnamate, Isopentyl Trimethoxycinnamate Trisiloxane, Isopropyl Methoxycinnamate, Isopropylbenzyl Salicylate, PIG-25 PABA, Polyacrylamidomethyl Benzylidene Camphor, Potassium Phenyl At least one member selected from the group consisting of Potassisium Phenylbenzimidazole Sulfonate, Sodium Phenylbenzimidazole Sulfonate, and TEI-Phenylbenzimidazole Sulfonate. Cosmetic composition for sun protection. The cosmetic composition for sunscreen according to claim 1, wherein the inorganic sunscreen is titanium dioxide or zinc oxide. 7. The cosmetic composition for sunscreen according to claim 6, wherein the inorganic sunscreen has an average particle size of 10 nm to 100 nm. The cosmetic composition for sunscreen according to claim 7, wherein the outermost surface of the inorganic sunscreen is coated with silica. According to claim 8, wherein the silica is a sunscreen cosmetic composition, characterized in that 1 to 40% by weight relative to the total weight of the inorganic sunscreen and coating material. The cosmetic composition for sunscreen according to claim 9, wherein aluminum silica is mixed with the silica to be used. The cosmetic composition for sunscreen according to claim 10, wherein the aluminum oxide is 1 to 20% by weight based on the total weight of the inorganic sunscreen and the coating material. According to claim 1, wherein the composition is a sunscreen cosmetic composition, characterized in that having a penetration hardness of 200 ~ 900 (N / 1000). According to claim 1, wherein the composition is a sunscreen cosmetic composition, characterized in that it has a pH of 8.3 to 9.5.