KR102587916B1 - Cosmetic composition of water-in-silicone type containing organic UV absorbers - Google Patents

Abstract

The present invention relates to a water-in-silicone cosmetic composition containing an organic sunscreen. According to the present invention, a stable silicone composition containing bis-ethylhexyloxyphenol methoxyphenyl triazine, which could not be applied to silicone formulations due to solubility problems, A heavy water type cosmetic composition for sunscreen can be provided.

Description

Cosmetic composition of water-in-silicone type containing organic UV absorbers}

The present invention relates to a water-in-silicone type cosmetic composition containing an organic sunscreen.

Ultraviolet rays (UV rays) have been identified as a major cause of erythema, edema, and freckles on the skin and, in extreme cases, skin cancer. Therefore, much research is being conducted on various skin diseases caused by UV rays. Generally, ultraviolet rays are classified according to their wavelength into UV-C wavelengths of 240 to 280 nm, UV-B wavelengths of 280 to 320 nm, and UV-A wavelengths of 320 to 400 nm. Among these, UV-C is lost without reaching the earth's surface as it passes through the ozone layer, UV-B penetrates into the epidermis of the skin and causes erythema, freckles, and edema, and UV-A penetrates into the dermis of the skin and causes wrinkles and melanin formation. It is known to cause skin aging and skin irritation, or to cause skin cancer.

Recently, as the amount of ultraviolet irradiation on the earth's surface has increased due to ozone layer destruction, the market for products with the main purpose of blocking ultraviolet rays is growing significantly every year, and consumer needs for cosmetic compositions for blocking ultraviolet rays across all wavelengths are increasing. am.

In general, cosmetic compositions for UV protection have been proposed as either a W/O type (water-in-oil type) with oil as the outer layer or an O/W type (oil-in-water) with an aqueous phase as the outer layer.

In the case of the O/W type, it has the advantage of having a refreshing feeling when applied to the skin compared to the W/O type product, but despite continued research to improve water resistance, it still has the disadvantage of being easily washed off with sweat or water. , it has the disadvantage that the sustainability of the UV blocking effect is significantly reduced.

On the other hand, the W/O type has excellent durability compared to O/W type products, but has the disadvantage of feeling heavy and sticky. This is not unrelated to the fact that general W/O type products have high viscosity. In addition, W/O type products are manufactured with high viscosity by increasing the ratio of the water phase, which is the inner phase, in order to lightly adjust the feeling of use, so they have the disadvantage of lower emulsion stability compared to O/W type. On the other hand, W/O type products with low viscosity have the problem of deteriorating the stability of the product due to separation of the inner water phase and the outer oil phase when stored for a long period of time in the container during distribution. Therefore, in order to increase stability, the viscosity is increased, and when the viscosity is increased, the disadvantage is that the feeling of use becomes heavy and sticky.

Meanwhile, most organic sunscreens have poor stability against heat and light, and in particular, bis-ethylhexyloxyphenol methoxyphenyl triazine has poor solubility in solvents, so it dissolves in highly polar oils such as alkyl benzoates. I had to apply it to my daily life. As an alternative to solve this problem, composite particles containing organic sunscreens such as bis-ethylhexyloxyphenol methoxyphenyl triazine have been proposed, but they have not completely solved the solubility problem.

Accordingly, focusing on the problems of conventional cosmetic compositions for blocking ultraviolet rays, the present inventors proposed a silicone-in-water type cosmetic composition that has water resistance, excellent adhesion, and can provide a light and silky feel at the same time, and conducted repeated research on it. did. As a result, it was confirmed that it was possible to provide a water-in-silicone type cosmetic composition that can stably contain bis-ethylhexyloxyphenol methoxyphenyl triazine, which had not been applicable to silicone-based trauma due to solubility issues, and the present invention was carried out. Completed.

The purpose of the present invention is to secure a stable formulation containing bis-ethylhexyloxyphenol methoxyphenyl triazine, which was not applicable to silicone-based trauma due to solubility problems. That is, the purpose of the present invention is to provide a stable water-in-silicone type cosmetic composition containing bis-ethylhexyloxyphenol methoxyphenyl triazine.

Another object of the present invention is to provide a silicone-based water-type cosmetic composition that can provide synergy in the UV-blocking effect by simultaneously applying an organic-based sunscreen to internal and external wounds.

Another object of the present invention is to provide a silicone-based water-type cosmetic composition that can prevent skin damage from ultraviolet rays without irritation as well as provide a continuous ultraviolet ray blocking effect by improving sustainability and water resistance with improved adhesion to the skin.

In order to achieve the above object, one aspect of the present invention provides a water-in-silicon type cosmetic composition containing microparticles containing bis-ethylhexyloxyphenol methoxyphenyl triazine.

At this time, the water-in-silicon type cosmetic composition is a cosmetic composition for blocking ultraviolet rays.

In the water-in-silicon type cosmetic composition according to an embodiment of the present invention, the microparticles support 20% by weight or more of bis-ethylhexyloxyphenol methoxyphenyl triazine based on the total weight of the microparticles. It may be.

In the water-in-silicon type cosmetic composition according to an embodiment of the present invention, the microparticles may be hemispherical.

In the water-in-silicon type cosmetic composition according to an embodiment of the present invention, the average diameter of the microparticles may be in the range of 1 to 10㎛.

The water-in-silicon type cosmetic composition according to an embodiment of the present invention may further include a phenylbenzimidazole-based compound and a cyclodextrin-based compound in the water phase.

In the water-in-silicone type cosmetic composition according to an embodiment of the present invention, the phenylbenzimidazole-based compound and the cyclodextrin-based compound may be included in a weight ratio of 1:0.1 to 1:10.

The pH of the water-in-silicone type cosmetic composition according to an embodiment of the present invention may be 7.5 or higher. In particular, the water-in-silicone type cosmetic composition containing the phenylbenzimidazole-based compound and the cyclodextrin-based compound may have a pH of 7.5 or higher. In this case, it is good to be able to achieve not only improved formulation stability but also a boosting effect in SPF.

The water-in-silicon type cosmetic composition according to an embodiment of the present invention may satisfy the following relational equation 1.

[Relational Expression 1]

0.1≤B/A≤1.0

[In relational expression 1 above,

A is the usage amount (g) of bis-ethylhexyloxyphenol methoxyphenyl triazine,

B is the amount of phenylbenzimidazole compound used (g)]

The water-in-silicone type cosmetic composition according to an embodiment of the present invention is a polar oil containing at least one polar functional group selected from a carboxyl group (COO), a ketone group (CO), and a hydroxy group (OH), and the total weight of the composition is As a standard, it may be included in 0 to 1% by weight.

In the water-in-silicone type cosmetic composition according to an embodiment of the present invention, the composition may further include a PEG-added silicone-based surfactant.

The water-in-silicone type cosmetic composition according to an embodiment of the present invention may contain 0.1 to 10% by weight of the bis-ethylhexyloxyphenol methoxyphenyl triazine, based on the total weight of the composition.

In addition, the water-in-silicone type cosmetic composition according to an embodiment of the present invention contains 15% by weight or less of an organic sunscreen containing bis-ethylhexyloxyphenol methoxyphenyl triazine, and the formula calculated by the following formula 1: The composition may have a UV protection index of 30 or more.

[Equation 1]

UV protection index = (minimum amount of erythema on the skin area to which the silicone-in-water type cosmetic composition was applied)/(minimum amount of erythema on the skin area on which the silicone-in-water type cosmetic composition was not applied)

According to the present invention, it is possible to secure a stable water-in-silicone type formulation using bis-ethylhexyloxyphenol methoxyphenyl triazine, which could not be applied to silicone formulations due to solubility problems.

In addition, according to the present invention, a very stable water-in-silicone type cosmetic composition containing bis-ethylhexyloxyphenol methoxyphenyl triazine can be provided despite substantially not using polar oil.

In addition, according to the present invention, it is possible to implement a stable formulation that stably contains an organic sunscreen in each of the inner water phase and the outer oil phase (silicon phase), which not only provides synergy in the UV blocking effect, but also allows the entire UV wavelength range (UV It can block ultraviolet rays ranging from UV A, UV B, and UV C).

In addition, according to the present invention, by introducing silicone into the outer oil phase, it is possible to provide a silicone-in-water type cosmetic composition that provides a light and refreshing feeling of use and excellent water resistance at the same time, has excellent durability due to high adhesion to the skin, and does not smudge after application. there is.

In short, according to the present invention, by improving the solubility and formulation stabilization problems of bis-ethylhexyloxyphenol methoxyphenyl triazine, it is possible to provide a water-in-silicone type UV-blocking cosmetic composition with improved UV-blocking effect and excellent water resistance. there is.

Figure 1 (a) is an SEM photograph of the microparticles of the present invention (scale bar 20㎛),
Figure 1(b) is an SEM photograph of the microparticles of the present invention (scale bar 2㎛),
Figure 2 (a) is a photograph of microparticles of the present invention dispersed in butylene glycol (BG) observed with an optical microscope (200x optical magnification).
Figure 2 (b) is a photograph of microparticles of the present invention dispersed in butylene glycol (BG) observed with an optical microscope (200x polarization).
Figure 2 (c) is a photograph of the microparticles of the present invention dispersed in phenyltrimethicone observed with an optical microscope (200x optical magnification).
Figure 2 (d) is a photograph of the microparticles of the present invention dispersed in phenyltrimethicone observed with an optical microscope (200 times polarization),
Figure 3 (a) is a photograph of the cosmetic composition of Example 1 according to the present invention observed with an optical microscope (200x optical magnification),
Figure 3 (b) is a photograph of the cosmetic composition of Example 1 according to the present invention observed with an optical microscope (200 times polarization),
Figure 4 (a) is a photograph of the cosmetic composition of Example 2 according to the present invention observed with an optical microscope (200 times optical magnification).
Figure 4 (b) is a photograph of the cosmetic composition of Example 2 according to the present invention observed with an optical microscope (200 times polarization),
Figure 5 (a) is a photograph of the cosmetic composition of Comparative Example 1 according to the present invention observed with an optical microscope (200 times optical magnification),
Figure 5 (b) is a photograph of the cosmetic composition of Comparative Example 1 according to the present invention observed with an optical microscope (200 times polarization),
Figure 6 (a) is a photograph of the cosmetic composition of Comparative Example 2 according to the present invention observed with an optical microscope (200 times optical),
Figure 6 (b) is a photograph of the cosmetic composition of Comparative Example 2 according to the present invention observed with an optical microscope (200 times polarization),
Figure 7 (a) is a photograph of the cosmetic composition of Example 3 according to the present invention observed with an optical microscope (200x optical magnification),
Figure 7 (b) is a photograph of the cosmetic composition of Example 3 according to the present invention observed with an optical microscope (200 times polarization),
Figure 8 shows the results of the sensory evaluation according to the present invention, showing the evaluation results of the feeling of use upon application of each sample of Example 3 and the w/s cream control group.
Figure 9 shows the results of the sensory evaluation according to the present invention, showing the evaluation results of the feeling after application of each sample of Example 3 and the w/s cream control group.
Figure 10 shows the total results of sensory evaluation according to the present invention.

The water-in-silicone cosmetic composition containing an organic sunscreen according to the present invention will be described in detail below. However, unless there are other definitions in the technical and scientific terms used herein, those skilled in the art will It has a commonly understood meaning, and in the following description, descriptions of known functions and configurations that may unnecessarily obscure the gist of the present invention are omitted.

The term "silicone heavy water type" in this specification refers to an emulsion that has an oil containing silicone oil as a main component as a continuous phase and a dispersed phase containing water therein. In other words, the water-in-silicone type cosmetic composition refers to an emulsion in which an inner aqueous phase containing water is dispersed in an outer oil phase containing silicone oil.

As used herein, the term "outer oil phase" refers to a continuous phase containing silicone oil as a main ingredient, and may have the same meaning as the outer or silicone phase, and the "internal water phase" refers to a dispersed phase containing water. , may have the same meaning as award.

As used herein, the term “hydrophilic-lipophilic balance (HLB)” refers to an indicator representing the balance between the hydrophilic and lipophilic groups of a surfactant. At this time, HLB can be expressed through a numerical value of 0 to 20. A low value indicates lipophilic characteristics, and conversely, a high value indicates hydrophilic characteristics.

In general, bis-ethylhexyloxyphenol methoxyphenyl triazine had to be applied to the oil phase by dissolving it in highly polar oils such as alkyl benzoates, and its solubility in silicone-based oils was very low, so it was used in formulations where silicone was the external component. Even if applied, the UV blocking effect was minimal.

Accordingly, the present inventors solved the problem of Bis-ethylhexyloxyphenol Methoxyphenyl Triazine (BEMT), which has difficulty in formulation application due to solubility problems despite having a high UV blocking effect, and developed a variety of products. Research on methods applicable to this type of dosage form was deepened.

As a result, by using microparticles containing bis-ethylhexyloxyphenol methoxyphenyl triazine, the above-mentioned problems were solved, and at the same time, a stable formulation was realized despite the silicone being a foreign body, and bis-ethylhexyloxy The present invention was completed by confirming that it is possible to provide a water-in-silicone type cosmetic composition that can solve the precipitation problem of phenol methoxyphenyl triazine.

According to the present invention, it is possible to provide a water-in-silicone type cosmetic composition that can uniformly disperse bis-ethylhexyloxyphenol methoxyphenyl triazine in the formulation and provide an SPF boosting effect by effectively scattering ultraviolet rays. there is.

On the other hand, in a typical emulsion formulation, it is difficult to coexist at the same time with a light, non-sticky feel and a feeling of residue and thickness with excellent adhesion. However, it should be noted that the water-in-silicone type cosmetic composition according to the present invention is a formulation with an optimal formulation that can simultaneously provide these feeling of use, and provides a feeling of use differentiated from ordinary emulsion formulations.

That is, the present invention provides a new formulation in which bis-ethylhexyloxyphenol methoxyphenyl triazine can be stably used in various silicone formulations.

Hereinafter, the configuration of the present invention will be described in detail.

The water-in-silicon type cosmetic composition according to one aspect of the present invention may include microparticles containing bis-ethylhexyloxyphenol methoxyphenyl triazine.

Although the water-in-silicone type cosmetic composition according to one aspect of the present invention uses bis-ethylhexyloxyphenol methoxyphenyl triazine, which has very low solubility in silicone oil, it does not adhere to the surface of the microparticles or trauma of the composition. By effectively suppressing the precipitation of bis-ethylhexyloxyphenol methoxyphenyl triazine into crystals, the solubility problem of bis-ethylhexyloxyphenol methoxyphenyl triazine was solved.

Specifically, in the water-in-silicon type cosmetic composition according to one aspect of the present invention, the microparticles contain 20% by weight or more of bis-ethylhexyloxyphenol methoxyphenyl triazine, based on the total weight of the microparticles. It may be that you are doing it. At this time, the microparticles may contain only bis-ethylhexyloxyphenol methoxyphenyl triazine within the particles.

Despite containing the above-described content of bis-ethylhexyloxyphenol methoxyphenyl triazine, the microparticles have excellent photostability and are stably dispersed in the silicone outer layer to achieve an excellent ultraviolet ray blocking effect.

More specifically, the microparticles may have a hemispherical particle shape.

The water-in-silicon type cosmetic composition according to an embodiment of the present invention contains microparticles having a hemispherical particle shape, thereby providing a feeling of use differentiated from spherical microparticles, providing excellent durability with improved adhesion, and significant oil absorption. It should be noted that it exhibits excellent sebum absorption ability in terms of total penetration volume.

Additionally, in the water-in-silicon type cosmetic composition according to an embodiment of the present invention, the average diameter of the microparticles may be in the range of 1 to 10㎛, but is not limited thereto. At this time, when hemispherical microparticles are used, it provides a differentiated feeling of use compared to when spherical microparticles are used, and provides excellent durability with high adhesion, increasing the UV blocking effect.

For example, in terms of stably dispersing on the silicone outer surface and realizing excellent adhesion, the average diameter of the microparticles is preferably in the range of 1 to 8㎛, and more preferably in the range of 2 to 6㎛. It is not limited to this.

In the water-in-silicon type cosmetic composition according to an embodiment of the present invention, the microparticles may contain bis-ethylhexyloxyphenol methoxyphenyl triazine homogeneously in the internal matrix of the polymer particles. At this time, the homogeneous may mean that the bis-ethylhexyloxyphenol methoxyphenyl triazine is molecularly uniformly mixed within the polymer matrix.

As an example, the microparticles may be manufactured by dispersion polymerization using an oil phase containing bis-ethylhexyloxyphenol methoxyphenyl triazine, a polymerizable monomer, and a multifunctional crosslinking monomer. That is, the microparticles may contain bis-ethylhexyloxyphenol methoxyphenyl triazine homogeneously in the internal matrix of the polymer particle.

As an example, the microparticles may be hemispherical particles.

The present inventor discovered that during dispersion polymerization to produce microparticles solely containing bis-ethylhexyloxyphenol methoxyphenyl triazine, an organic sunscreen, a hemispherical shape can be achieved depending on the amount used. . At this time, the microparticles may contain 20% by weight or more of bis-ethylhexyloxyphenol methoxyphenyl triazine, as described above. The microparticles prepared by the dispersion polymerization may specifically contain 24 to 30% by weight of the bis-ethylhexyloxyphenol methoxyphenyl triazine, and more specifically, 24.5 to 28.5% by weight. there is.

If the above-mentioned range is satisfied, it is possible to improve the desired effect by forming hemispherical microparticles, but it is not limited thereto.

In addition, the microparticles prepared by dispersion polymerization may use 0.1 to 100 parts by weight of the multifunctional crosslinking monomer based on 100 parts by weight of the polymerizable monomer, and the amount used may vary depending on the degree of crosslinking for the purpose. Of course, the amount of bis-ethylhexyloxyphenol methoxyphenyl triazine used can be appropriately adjusted to suit the shape of the particle to be implemented.

As an example, based on 100 parts by weight of the polymerizable monomer, the multifunctional crosslinking monomer may be specifically used in an amount of 1 to 50 parts by weight, and more specifically, may be used in an amount of 1 to 25 parts by weight, but is not limited thereto.

The polymerizable monomer is a radically polymerizable monomer, and is not limited as long as it can be copolymerized with a multifunctional crosslinking monomer described later. Specifically, it may be a radically polymerizable monomer containing one ethylene group. For example, aromatic vinyl monomers such as styrene, methylstyrene, ethylstyrene, fluorostyrene, chlorostyrene, and vinyltoluene; Methyl (meth)acrylate, ethyl (meth)acrylate, butyl (meth)acrylate, octyl (meth)acrylate, stearyl (meth)acrylate, benzyl (meth)acrylate, glycidyl (meth)acrylate Acrylic vinyl monomers such as latex; etc. can be mentioned. Additionally, in the present invention, one or more of the radically polymerizable monomers described above may be used.

The multifunctional crosslinking monomer is not limited as long as it is a monomer capable of crosslinking the polymerizable monomer, and may specifically be a crosslinking monomer containing two or more ethylene groups. As an example, divinylbenzene, ethylene glycol dimethacrylate, diethylene glycol dimethacrylate, triethylene glycol dimethacrylate, trimethylene propane trimethacrylate, 1,3-butanediol dimethacrylate, 1, 6-hexanediol dimethacrylate, tri(meth)acrylate, etc. are mentioned. Additionally, in the present invention, one or more of the above-described multifunctional crosslinking monomers may be used.

In addition, the water-in-silicon type cosmetic composition according to an embodiment of the present invention may include the microparticles in an amount of 1 to 35% by weight, specifically 5 to 30% by weight, more specifically, based on the total weight of the composition. It may contain 5 to 15% by weight.

That is, the water-in-silicone type cosmetic composition may contain up to 10% by weight of bis-ethylhexyloxyphenol methoxyphenyl triazine, based on the total weight of the composition.

The water-in-silicon type cosmetic composition according to one embodiment of the present invention may further include a phenylbenzimidazole-based compound and a cyclodextrin-based compound in the water phase.

The phenylbenzimidazole-based compound is one of the organic sunscreens contained in the water phase, and in a typical O/W formulation, crystal precipitation is suppressed by adjusting the pH of the formulation to an appropriate range. On the other hand, in the silicon-based W/S formulation, phenylbenzimidazole-based compounds precipitated, making it difficult to apply to the water phase.

Despite these characteristics, the water-in-silicon type cosmetic composition according to one embodiment of the present invention can effectively suppress its problems (e.g., crystal precipitation) by using a combination of the above-described microparticles and phenylbenzimidazole-based compound. It was confirmed that it was possible. In addition, the simultaneous use of a cyclodextrin-based compound not only suppresses crystal precipitation more effectively, but also helps the phenylbenzimidazole-based compound to be stably redissolved in the aqueous phase even if some crystals precipitate in the aqueous phase.

As an example, the phenylbenzimidazole-based compound and the cyclodextrin-based compound may be included in a weight ratio of 1:0.1 to 1:10.

As an example, the phenylbenzimidazole-based compound and the cyclodextrin-based compound may be specifically included in a weight ratio of 1:1 to 1:2, more specifically in a weight ratio of 1:1.5 to 1:2, and the above-mentioned weight ratio may be If it is satisfied, it is good in that it is possible to realize improved formulation stability.

For example, in order to ensure a more stable formulation, the pH of the composition may be 7.5 or higher, and it is better to satisfy the pH range of 7.5 to 9, and more specifically, 7.5 to 8.5.

As an example, when the composition satisfies the weight ratio of the phenylbenzimidazole-based compound and the cyclodextrin-based compound described above and at the same time satisfies the pH range of 7.5 or more, crystal precipitation of the phenylbenzimidazole-based compound is suppressed and the formulation stability is improved. It is good in that it can promote .

Phenylbenzimidazole-based compounds are one of the water-soluble organic sunscreens, and examples include Phenylbenzimidazole Sulfonic Acid, Potassium Phenylbenzimidazole Sulfonate, and Sodium Phenylbenzimidazole Sulfonate ( Examples include Sodium Phenylbenzimidazole Sulfonate and TEA-Phenylbenzimidazole Sulfonate. Additionally, in the present invention, one or more of the phenylbenzimidazole-based compounds described above may be used, but the present invention is not limited thereto.

At this time, in the water-in-silicone type cosmetic composition according to an embodiment of the present invention, the phenylbenzimidazole-based compound may be included in an amount of 0.1 to 10% by weight, specifically 0.5 to 4.5% by weight, based on the total weight of the composition. %, more specifically, it may be included in 0.5 to 2.5% by weight, but is not limited thereto.

Cyclodextrin-based compounds are used to prevent crystal precipitation of phenylbenzimidazole-based compounds and improve formulation stability. Examples include alpha-cyclodextrin, beta-cyclodextrin, gamma-cyclodextrin, and hydroxypropyl beta-cyclodextrin. , carboxymethyl cyclodextrin, methylcarboxymethyl cyclodextrin, amino cyclodextrin, branched cyclodextrin with added glucose, cyclodextrin polymer, etc. Additionally, in the present invention, one or two or more of the cyclodextrin-based compounds described above may be used, but the present invention is not limited thereto.

As described above, in the water-in-silicon type cosmetic composition according to an embodiment of the present invention, the phenylbenzimidazole-based compound and the cyclodextrin-based compound are included in the water phase. At this time, the cyclodextrin-based compound serves to effectively suppress crystal precipitation of the phenylbenzimidazole-based compound contained in the water phase, and when a predetermined weight ratio is satisfied and the appropriate pH range of the composition is met, the phenylbenzimidazole-based compound It can completely suppress crystal precipitation of the compound and provide a more stable formulation.

In the water-in-silicone type cosmetic composition according to an embodiment of the present invention, the amount of the bis-ethylhexyloxyphenol methoxyphenyl triazine and phenylbenzimidazole-based compounds used may satisfy the following relational equation 1.

[Relationship 1]

0.1≤B/A≤1.0

[In equation 1 above,

A is the usage amount (g) of bis-ethylhexyloxyphenol methoxyphenyl triazine,

B is the amount of phenylbenzimidazole compound used (g)]

If the above relational equation 1 is satisfied, it can provide a synergistic effect on the SPF (Sun protection factor) index of the composition, and specifically, the amount of bis-ethylhexyloxyphenol methoxyphenyl triazine and phenylbenzimidazole-based compounds used The ratio (B/A) may satisfy 0.3 to 0.8. If this relationship is satisfied, an organic sunscreen (i.e., bis-ethylhexyloxyphenol methoxyphenyl triazine and phenylbenzimidazole-based compound) stably dispersed and dissolved in both the inner water phase and the outer oil phase of the formulation can be used simultaneously. By introducing it, it is possible to realize a UV blocking effect across the entire range of UV wavelengths (UV A, UV B, UV C).

In addition, the water-in-silicone type cosmetic composition according to an embodiment of the present invention is characterized in that it contains substantially no or a trace amount of polar oil for dissolving bis-ethylhexyloxyphenol methoxyphenyl triazine.

That is, according to the present invention, despite not containing polar oil or using a trace amount of polar oil, it is possible to overcome the solubility of bis-ethylhexyloxyphenol methoxyphenyl triazine and provide a very stable water-in-silicone type cosmetic composition. It suggests that there is.

As an example, the polar oil contains one or more polar functional groups selected from a carboxylic acid group (COO), a ketone group (CO), and a hydroxyl group (OH), for example, cetyl ethylhexanoate, octyl dodecyl myristate, Di-C12-13 alkyl maleate, pentaerythrityl tetraisostearate, pentaerythrityl tetraethylhexanoate, diisostearyl maleate, isopropyl palmitate, C12-15 alkyl benzoate, dicaprylic carbonate, Dicaprylic ether and 2-octyldodecanol, etc. can be mentioned.

As an example, the polar oil may be included in an amount of 0 to 1% by weight, specifically 0 to 0.5% by weight, and more specifically 0 to 0.1% by weight, based on the total weight of the composition, but is limited thereto. That is not the case.

In addition, the water-in-silicon type cosmetic composition according to an embodiment of the present invention stably disperses microparticles containing bis-ethylhexyloxyphenol methoxyphenyl triazine and at the same time bis-ethylhexyl precipitated as crystals on the interface. In terms of not generating oxyphenol methoxyphenyl triazine, it is specifically recommended to use a PEG-added silicone-based surfactant.

Examples of PEG-added silicone surfactants include PEG/PPG-18/18 Dimethicone (Cyclopentasiloxane and PEG/PPG-18/18 Dimethicone), PEG-30 Dipolyhydroxystearate, and PEG-7 Dimethicone. PEG-7 Dimethicone, PEG-10 Dimethicone, Cyclopentasiloxane/PEG.PPG-19.19 Dimethicone, Sorbitan Isostearate ), Lauryl PEG.PPG-18.18 Methicone, Cetyl PEG.PPG-10.1 Dimethicone, Lauryl PEG-9 polydimethylsiloxyethyl dimethicone Chicon (Lauryl PEG-9 Polydimethylsiloxyethyl Dimethicone), etc. may be mentioned. Additionally, in the present invention, one or more of the PEG-added silicone-based surfactants exemplified may be used, but the present invention is not limited thereto.

More specifically, the PEG-added silicone-based surfactant may be a nonionic surfactant with a hydrophilic-lipophilic balance (HLB) of 1 to 6.

At this time, in the water-in-silicone type cosmetic composition according to an embodiment of the present invention, of course, the amount of the PEG-added silicone-based surfactant used can be appropriately adjusted depending on the type and content of the silicone-based oil.

As an example, 1 to 10% by weight of PEG-added silicone-based surfactant may be used based on the total weight of the composition, specifically 1 to 8% by weight, more specifically 3 to 6% by weight of PEG-added silicone-based surfactant. can be used, but is not limited to this.

In addition, the water-in-silicone type cosmetic composition according to an embodiment of the present invention may contain 1 to 4.5% by weight of the bis-ethylhexyloxyphenol methoxyphenyl triazine, based on the total weight of the composition, and may include specific It may contain 1 to 4% by weight, more specifically 1.5 to 3.5% by weight.

In addition, the water-in-silicone type cosmetic composition according to an embodiment of the present invention contains 15% by weight or less of an organic sunscreen containing bis-ethylhexyloxyphenol methoxyphenyl triazine, calculated by the following formula 1: The UV protection index of the composition may be 30 or more.

[Equation 1]

UV protection index = (minimum amount of erythema on the skin area to which the silicone-in-water type cosmetic composition was applied)/(minimum amount of erythema on the skin area on which the silicone-in-water type cosmetic composition was not applied)

As an example, the water-in-silicone type cosmetic composition according to the present invention contains up to 4.5% by weight of bis-ethylhexyloxyphenol methoxyphenyl triazine, and is an organic composition containing the bis-ethylhexyloxyphenol methoxyphenyl triazine. Containing 25% by weight or less of a sunscreen, the UV protection index of the composition calculated by Equation 1 may be 10 to 50, and specifically, the UV protection index of the composition may be 20 to 50, more specifically, the UV protection index of the composition may be 10 to 50. The composition may have a UV protection index of 30 to 50.

The water-in-silicone type cosmetic composition according to an embodiment of the present invention includes dimethicone, cyclomethicone, phenyltrimethicone, polydimethylsiloxane, methylphenylpolysiloxane, methylcyclopolysiloxane, octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, It contains one or two or more silicone-based oils selected from dodecamethylcyclohexasiloxane, tetradecamethylhexasiloxane, and octamethyltrisiloxane.

As an example, the silicone-based oil may be included in 15 to 60% by weight, specifically 15 to 50% by weight, and more specifically 20 to 40% by weight, based on the total weight of the composition, but is limited thereto. That is not the case.

In one example, the composition includes a residual amount of water.

In addition, the water-in-silicone type cosmetic composition according to an embodiment of the present invention may further include an organic sunscreen and an inorganic sunscreen depending on the purpose, as well as a moisturizing ingredient, a thickener, a pH adjuster, an anti-discoloration agent, a pigment, It may further include one or more additives selected from fragrances, preservatives, and soothing agents. At this time, organic sunscreen, inorganic sunscreen, and additives may each be included in an amount of 0.01 to 20% by weight based on the total weight of the composition, but are not limited thereto.

Hereinafter, a water-in-silicone type cosmetic composition containing an organic sunscreen according to an example of the present invention will be described in more detail through examples. However, the following examples are only a reference for explaining the present invention in detail, and the present invention is not limited thereto, and may be implemented in various forms. Additionally, the unit of components not specifically described in the specification may be g or weight percent based on the total composition.

(Assessment Methods)

1. Evaluation of sun protection factor (SPF)

The amount of ultraviolet rays emitted from the solar simulator lamp to the test area was adjusted to 20~100mj/cm2 and irradiated to the test subject's back. Minimal erythema dosa (MED) was confirmed 24 hours after irradiation with ultraviolet rays.

To confirm the UV blocking effect of each sample (Examples and Comparative Examples), 0.1 g of the sample was uniformly applied to the subject's back at a thickness of 2 ㎕/cm2 and left to dry for 15 minutes. An ultraviolet ray irradiation window was attached and fixed to each sample application area, and areas other than the irradiation window were irradiated with ultraviolet rays using leather and towels to block the ultraviolet rays.

Using the subject's MED as a standard (SPF 50), the amount of ultraviolet rays was investigated, and the test was conducted by gradually increasing the amount of ultraviolet rays. The minimum amount of erythema was determined 24 hours after ultraviolet irradiation, and the ultraviolet ray blocking effect was calculated according to Equation 1 below. The results are shown in Table 2 below.

[Equation 1]

UV protection index = (minimum amount of erythema on the skin area to which the silicone-in-water type cosmetic composition was applied)/(minimum amount of erythema on the skin area on which the silicone-in-water type cosmetic composition was not applied, MED)

2. Sensory evaluation

The sensory evaluation of each sample (example) was evaluated based on the feeling of use at the time of application and after application. The sensory evaluation was conducted using a general survey questionnaire method with five men and five men each participating in the evaluation, and the results are shown in Figures 8 to 10 below. In the above sensory evaluation, w/s cream prepared using the ingredients in Table 3 below was used as a control, and the survey questions and answers were confirmed on a 10-point scale (-5 to 5 points).

3. Skin safety evaluation

In order to confirm the skin safety of each sample (Example), a patch test was conducted for each sample (Example). Specifically, the left and right lower arms of each panel (5 men and 5 women) were washed with soap, and then the skin was acclimatized to a temperature of around 20°C and a humidity of around 40%. The test area was set as a rectangle measuring 4 A second reading was later performed. In order to determine the intensity of skin irritation of each sample, the skin irritation of each sample was visually determined by calculating the average skin reactivity by assigning weights according to the degree of positive skin reaction. The results are shown in Table 5 below. At this time, the judgment standard was judged on a 5-point scale, and the average skin reactivity was calculated according to the equation 2 below (judgment criteria: less than 1 point (grade I): non-irritating range, 1 point to less than 3 points (grade II): Mild irritation, 3 or more points but less than 5 points (grade III): moderate irritation, 5 points or more (grade IV): strong irritation).

[Equation 2]

(Production Example 1)

9 g of polyvinyl alcohol was added to the reaction tank and dissolved in 2000 g of distilled water to prepare an aqueous phase.

Add 200g of methyl methacrylate (MMA) and 25g of ethylene glycol dimethacrylate to the emulsifier and stir for 5 minutes, then add 75g of bis-ethylhexyloxyphenol methoxyphenyl triazine (BEMT) and dissolve for 30 minutes. An oil phase was prepared. Accordingly, 3 g of the initiator 2,2'-azobis-(2,4-dimethylvaleronitrile) was added and mixed.

After adding the aqueous phase to the emulsifier, dispersion polymerization was performed for 30 minutes using the emulsifier, the temperature was raised, and reaction was performed at 50° C. for 15 hours.

The obtained polydisperse microparticles were dehydrated using a reduced pressure filter, washed with water three times, and dried under vacuum to obtain hemispherical microparticles containing 25% by weight of final bis-ethylhexyloxyphenol methoxyphenyl triazine. (Yield = 90%, average diameter of microparticles = 2㎛, see Figure 1).

Oil absorption was measured using the hemispherical microparticles obtained by the above method (measured in a room maintained at room temperature (23°C) in accordance with the oil absorption measurement method described in JIS K 5101-13-1).

As a result, it was confirmed that the hemispherical microparticles obtained by the above method had an oil absorption of 0.888 mL/g and a total intrusion volume of 1.37 mL/g. This corresponds to an oil absorption of more than 150% and a total penetration volume of more than 210% compared to regular PMMA spherical particles.

In addition, the hemispherical microparticles obtained by the above method can be stably dispersed in polyol (e.g., butylene glycol) or silicone oil (e.g., phenyltrimethicone), and even during storage, bis-ethylhexyloxyphenol methoxyphenyl trimethoxyphenol No precipitation of azine was found (see Figure 2).

(Production Example 2)

In the method of Preparation Example 1, the same method was used except that 205.4 g of methyl methacrylate (MMA), 25.6 g of ethylene glycol dimethacrylate, and 69 g of bis-ethylhexyloxyphenol methoxyphenyl triazine (BEMT) were used. Through this method, spherical microparticles containing 28% by weight of final bis-ethylhexyloxyphenol methoxyphenyl triazine were obtained (yield = 92%, average diameter of microparticles = 2.2㎛).

(Examples 1 to 6)

A water-in-silicone type cosmetic composition was prepared with the composition shown in Table 1 below.

Specifically, the components of the oil phase were mixed and uniformly dispersed and dissolved. After mixing and dissolving the components of the aqueous phase, they were added to the heated oil phase components and emulsified using a homogenizer to prepare a water-in-silicone type cosmetic composition.

(Comparative Examples 1 to 2)

Using the composition shown in Table 2 below, a water-in-silicone type cosmetic composition was prepared in the same manner as in the above example.

It was confirmed that the water-in-silicone cosmetic composition according to the present invention can solve the problem of bis-ethylhexyloxyphenol methoxyphenyl triazine, which caused crystal precipitation due to solubility problems.

Specifically, as shown in Figures 3 and 4 below, the water-in-silicone type cosmetic composition according to the present invention contains phenylbenzimidazole-based bis-ethylhexyloxyphenol methoxyphenyl tria in the formulation when observed with an optical and polarizing microscope. It was confirmed that a very stable formulation could be maintained without the substance precipitating into crystals.

In addition, as shown in Figure 7 below, the water-in-silicone type cosmetic composition according to the present invention protects against ultraviolet rays across the entire range of ultraviolet wavelengths by combining it with a phenylbenzimidazole-based compound, which is one of the organic ultraviolet ray blockers applied to the water phase. In addition to the blocking effect, it can provide synergy to the SPF index. In particular, it was confirmed that with this combination, the phenylbenzimidazole-based compound applied to the water phase could be applied more stably to the formulation without precipitation.

On the other hand, as shown in Figure 5 below, in the case of Comparative Example 1, it was confirmed that bis-ethylhexyloxyphenol methoxyphenyl triazine was precipitated as crystals immediately after preparation of the formulation. In addition, as shown in Figure 6 below, in the case of Comparative Example 2, the phenomenon of phenylbenzimidazole-based compound applied to the water phase precipitating into crystals was observed under a polarizing microscope.

Meanwhile, as a result of the sensory evaluation, it was confirmed that the silicone-in-water type cosmetic composition according to the present invention is a formulation that can simultaneously provide a light, non-sticky feel and a feeling of residue and thickness with excellent adhesion.

Specifically, as shown in Figures 8 to 10 below, the water-in-silicon type cosmetic composition according to the present invention provides a soft feeling without stickiness when applied to the skin, while also providing a feeling of adhesion with an appropriate thickness. In addition, it provides silkiness and softness even after application, and at the same time reduces the feeling of residue or oiliness, increasing the favorability of the feeling of use. This feeling of use is in extreme contrast to the results of comparing commercially available w/s cream as a control group, and this result means that the preference for the feeling of use of the present invention is higher than that of the control group.

Additionally, as shown in Table 4, it was confirmed that the water-in-silicone type cosmetic composition according to the present invention does not cause irritation to the skin and can be used safely.

As described above, the present invention has been described with specific details, limited embodiments, and drawings, but these are provided only to facilitate a more general understanding of the present invention, and the present invention is not limited to the above embodiments, and the present invention Anyone skilled in the art can make various modifications and variations from this description.

Accordingly, the spirit of the present invention should not be limited to the described embodiments, and the scope of the patent claims described below as well as all modifications that are equivalent or equivalent to the scope of this patent claim shall fall within the scope of the spirit of the present invention. .

Claims (13)

comprising microparticles containing solely bis-ethylhexyloxyphenol methoxyphenyl triazine,
Phenylbenzimidazole-based compounds and cyclodextrin-based compounds are further included in the water phase,
A water-in-silicone type cosmetic composition having a pH of 7.5 or higher, wherein the phenylbenzimidazole-based compound and the cyclodextrin-based compound are included in a weight ratio of 1:1 to 1:2. delete According to clause 1,
The microparticles are a hemispherical water-in-silicon type cosmetic composition. According to clause 1,
A water-in-silicon type cosmetic composition wherein the average diameter of the microparticles is in the range of 1 to 10㎛. delete delete delete According to clause 1,
The composition is,
A cosmetic composition of the silicone-in-water type that satisfies the following relational expression 1.
[Relational Expression 1]
0.1≤B/A≤1.0
[In relational expression 1 above,
A is the usage amount (g) of bis-ethylhexyloxyphenol methoxyphenyl triazine,
B is the amount of phenylbenzimidazole compound used (g)] According to clause 1,
The composition is,
Silicone water containing 0 to 1% by weight of a polar oil containing at least one polar functional group selected from a carboxyl group (COO), a ketone group (CO), and a hydroxy group (OH), based on the total weight of the composition. Type of cosmetic composition. According to clause 1,
The composition is,
A water-in-silicone type cosmetic composition further comprising a PEG-added silicone-based surfactant. According to any one selected from claims 1, 3, 4, and 8 to 10,
The composition is a silicone-in-water type cosmetic composition for UV protection. According to any one selected from claims 1, 3, 4, and 8 to 10,
The composition is,
A water-in-silicone type cosmetic composition comprising 0.1 to 10% by weight of the bis-ethylhexyloxyphenol methoxyphenyl triazine, based on the total weight of the composition. According to clause 12,
The composition is,
A water-in-silicone type cosmetic composition containing 25% by weight or less of an organic sunscreen based on the total weight of the composition, and having a sunscreen index of 10 or more as calculated by Equation 1 below.
[Equation 1]
UV protection index = (minimum amount of erythema on the skin area to which the silicone-in-water type cosmetic composition was applied)/(minimum amount of erythema on the skin area on which the silicone-in-water type cosmetic composition was not applied)