KR102631286B1 - Sun care cosmetic composition with excellent blue light and ultraviolet ray blocking effect and water-resistant ultraviolet ray blocking effect - Google Patents

Abstract

The present invention provides an emulsifier comprising a first emulsifier and a second emulsifier; dispersant; and a sunscreen, wherein the first emulsifier and the second emulsifier are contained in a weight ratio of 1:0.2 to 9. The cosmetic composition for sunscreen according to the present invention has an excellent blocking effect of ultraviolet rays and blue light series, can effectively protect the skin, and also has excellent dispersibility, water resistance, and spreadability.

Description

Sun care cosmetic composition with excellent blue light and ultraviolet ray blocking effect and water-resistant ultraviolet ray blocking effect

The present invention relates to a cosmetic composition for blocking ultraviolet rays, which has excellent blue light blocking effect and ultraviolet ray blocking effect, and has improved dispersibility and spreadability.

Electromagnetic waves can be classified into infrared, visible, and ultraviolet rays depending on their wavelength. Among them, ultraviolet rays exposed through sunlight have a short wavelength and strong energy, so even short-term exposure can cause phenomena such as skin aging and wrinkles. In addition, blue-light, a type of visible light, is light with a wavelength of about 400 to 500 nm. Among the lights that reach the retina, it has strong energy and can have a harmful effect on the skin when exposed for a long time.

Accordingly, the demand for cosmetics that has the function of blocking not only ultraviolet rays but also blue light continues to increase. However, when manufacturing cosmetics with a blue light blocking effect, if white pigments or inorganic pigments are included, agglomeration occurs between particles, which causes poor dispersibility. If an excessive amount of dispersant is included to increase dispersibility, spreadability decreases, making it difficult to use. There is this bad problem. Therefore, there is a need to develop a cosmetic composition for UV protection that effectively blocks UV rays and blue light while also having excellent dispersibility and spreadability.

Accordingly, the present inventors have developed a cosmetic composition for sunscreen that effectively blocks ultraviolet rays and blue light and has excellent dispersibility and spreadability by mixing an emulsifier and a dispersant in an appropriate amount and using a surface-modified inorganic pigment. Completed.

(Patent Document 1) KR 10-2017-0038739 A

The purpose of the present invention is to provide a cosmetic composition for sunscreen that effectively blocks ultraviolet rays and blue light and has excellent dispersibility and spreadability.

The technical problems of the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art from the description below.

According to an embodiment of the present invention, an emulsifier comprising a first emulsifier and a second emulsifier; dispersant; and a sunscreen, wherein the first emulsifier and the second emulsifier are included in a weight ratio of 1:0.2 to 9. A cosmetic composition for sunscreen is provided.

Additionally, in the cosmetic composition, the emulsifier and dispersant may be included in a weight ratio of 1:0.003 to 2.

In addition, the sunscreen includes a core portion containing an inorganic pigment; And it may include composite inorganic particles including a surface coating agent coated on the outer surface of the core portion.

The cosmetic composition for sunscreen according to the present invention is excellent at blocking ultraviolet rays and blue light and can effectively protect the skin.

The cosmetic composition for sunscreen according to the present invention has excellent dispersibility and maintains a stable formulation without phase separation even over a wide range of temperatures and long-term storage. In addition, it has excellent water resistance, so it is not easily washed off by water or sweat and can maintain excellent UV protection effect.

In addition, the cosmetic composition for sunscreen according to the present invention has excellent spreadability and can be applied uniformly and provide an excellent feeling of use.

In order to more fully understand the drawings cited in the detailed description of the present invention, a brief description of each drawing is provided.
Figure 1 is a diagram showing the dispersibility according to the mixing ratio of the first emulsifier and the first emulsifier.
Figure 2 is a diagram showing dispersibility according to the mixing ratio of emulsifier and dispersant.
Figure 3 is a diagram showing dispersibility according to the content of the first emulsifier.
Figure 4 is a diagram showing dispersibility according to the content of the second emulsifier.
Figure 5 is a diagram showing dispersibility according to the content of the dispersant.

Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by a person skilled in the art to which the present invention pertains. In general, the nomenclature used herein is well known and commonly used in the art. Additionally, when describing embodiments of the present invention, if detailed descriptions of related known configurations or functions are judged to impede understanding of the embodiments of the present invention, the detailed descriptions will be omitted. In addition, embodiments of the present invention will be described below, but the technical idea of the present invention is not limited or limited thereto and may be modified and implemented in various ways by those skilled in the art.

In this specification, when a part includes a certain element, this does not mean excluding other elements, but may further include other elements, unless specifically stated to the contrary. In this specification, the term and/or includes a combination of a plurality of related items or any one item among a plurality of related items.

When a substance is defined as A*B in this specification, it may mean a mixture of component A and component B.

According to an embodiment of the present invention, a cosmetic composition for sunscreen is provided, including an emulsifier including a first emulsifier and a second emulsifier, a dispersant, and a sunscreen.

In the present invention, the emulsifier may include two or more different types of emulsifiers. When the emulsifiers include two different types, they may be defined as a first emulsifier and a second emulsifier, respectively, and the first emulsifier (or second emulsifier) may further include components other than the emulsifier component, and at least 2 More than one type of emulsifier may be included simultaneously.

In an embodiment, the first emulsifier:the second emulsifier may be included in a weight ratio of 1:0.2 to 9, specifically 1:0.5 to 7, and more specifically 1:0.5 to 5. If the second emulsifier is contained in an amount of less than 0.2 parts by weight based on 1 part by weight of the first emulsifier, dispersibility may decrease and phase separation may occur, and if the second emulsifier is contained in an amount of more than 9 parts by weight based on 1 part by weight of the first emulsifier, If it is included, the spreadability may be significantly reduced and the feeling of use may worsen. However, it is not limited to this.

The first emulsifier is It may contain a polyglyceryl-based emulsifier, for example, polyglyceryl-3 polydimethylsiloxyethyl dimethicone, polyglyceryl-4 diisostearate*polyhydroxystearate*sebacate, polyglyceryl- It may be one or more selected from the group consisting of 6 stearate, polyglyceryl-10 laurate, polyglyceryl-4 oleate, and polyglyceryl-3 lauryl polydimethylsiloxyethyl dimethicone, specifically polyglyceryl. It may be reel-3 polydimethylsiloxyethyl dimethicone. However, it is not limited to the substances listed above.

The first emulsifier may be included in an amount of 0.2 to 9% by weight, specifically 0.5 to 7% by weight, and more specifically 0.5 to 5% by weight, based on the total weight of the cosmetic composition. If the first emulsifier is included in less than 0.2% by weight based on the total weight of the cosmetic composition, dispersibility may decrease and phase separation may occur, and if it is included in more than 9% by weight, the formulation may not be formed. However, it is not limited to this.

The second emulsifier may include a polyglyceryl-based emulsifier, for example, lauryl polyglyceryl-3 polydimethylsiloxyethyl dimethicone, lauryl polyglyceryl-3 polydimethylsiloxyethyl dimethicone*tocopherol. , dimethicone polyol, polyglyceryl-2 sesquioleate, polyglyceryl-10 pentaoleate, polyglyceryl-5 hexostearate, polyglyceryl-4 diisostearate/polyhydroxystearate/seba It may be one or more selected from the group consisting of cate copolymer, diisostearoyl polyglyceryl-3 dimer dilinoleate, and specifically, lauryl polyglyceryl-3 polydimethylsiloxyethyl dimethicone, lauryl It may be polyglyceryl-3 polydimethylsiloxyethyl dimethicone*tocopherol. However, it is not limited to the substances listed above.

The first emulsifier and the second emulsifier may include different polyglyceryl-based emulsifiers.

The second emulsifier may be included in an amount of 0.2 to 9% by weight, specifically 0.5 to 7% by weight, and more specifically 0.5 to 5% by weight, based on the total weight of the cosmetic composition. If the second emulsifier is included in less than 0.2% by weight based on the total weight of the cosmetic composition, dispersibility may decrease and phase separation may occur, and if it is included in more than 9% by weight, spreadability may be poor. However, it is not limited to this.

When the first emulsifier and the second emulsifier are included in the cosmetic composition while satisfying the above range, the sunscreen is uniformly dispersed, so that excellent dispersibility and formulation stability can be maintained, thereby providing an ultraviolet ray or blue light blocking effect. It can appear more excellent, and the spreadability is improved to provide an excellent feeling of use.

In an embodiment, the dispersant is a substance that maintains the dispersed state of liquid or solid particles in a solvent (dispersion stabilization role), and maintains the dispersibility of the composite inorganic particles in the cosmetic composition according to the present invention for a long period of time and forms the formulation. It can play a role in improving stability.

The dispersant may be included in an amount of 0.2 to 4.5% by weight, specifically 0.3 to 3% by weight, based on the total weight of the cosmetic composition. If the dispersant is included in less than 0.2% by weight based on the total weight of the cosmetic composition, dispersibility may decrease and phase separation may occur, and if it is included in more than 4.5% by weight, the formulation may not be formed. However, it is not limited to this.

In embodiments, the dispersant may be an ionic or nonionic surfactant, such as distear dimonium hectorite, polyglyceryl-2dipolyhydroxystearate, nitrocellulose, silica, quaternium- It may be one or more types selected from the group consisting of 18 bentonite, quaternium-18 hectorite, and polycaprolactone, and specifically may be disteadimonium hectorite. However, it is not limited to this.

In an embodiment, the dispersant may be included in a constant weight ratio with the emulsifier. In an embodiment, the weight ratio of the emulsifier (meaning a mixture of the first emulsifier and the second emulsifier) and the dispersant in the cosmetic composition may be in the range of 1:0.003 to 2, and specifically, may be in the range of 1:0.025 to 0.5. If the dispersant is included in an amount of less than 0.003 parts by weight based on 1 part by weight of the emulsifier, dispersibility may decrease and phase separation may occur, and if the dispersant is included in more than 2 parts by weight based on 1 part by weight of the emulsifier, a formulation may not be formed. It may not be possible. However, it is not limited to this.

In an embodiment, a sunscreen may refer to an ingredient that protects the skin from ultraviolet rays, and the cosmetic composition according to the present invention may include an inorganic sunscreen as the sunscreen.

The sunscreen may be included in an amount of 0.5 to 50% by weight, specifically 0.5 to 40% by weight, and more specifically 0.5 to 30% by weight based on the total weight of the cosmetic composition. If the sunscreen is included in less than 0.5% by weight based on the total weight of the cosmetic composition, the sunscreen effect may be minimal, and if it is included in more than 50% by weight, dispersibility may be reduced. However, it is not limited to this.

In an embodiment, the sunscreen includes a core portion comprising an inorganic pigment; and a surface coating agent coated on the outer surface of the core portion. That is, the composite inorganic particle defined in the present invention refers to a particle that contains an inorganic pigment and whose surface is coated (modified) with one or more surface coating agents.

In embodiments, the inorganic pigment may refer to an oxide of a non-ferrous metal or an insoluble salt of a metal, such as zinc oxide, cerium oxide, titanium dioxide, silica, talc, mica, borosilicate, calcium carbonate, and barium sulfate. It may be at least one type selected from the group consisting of, but is not limited to this.

In an embodiment, the inorganic pigment may be included in 50 to 95% by weight, specifically 70 to 94% by weight, based on the total weight of the composite inorganic particles. If the inorganic pigment is included in less than 50% by weight based on the total weight of the composite inorganic particles, the ultraviolet ray blocking effect may be reduced due to a lack of particles that act as ultraviolet rays, and if it is included in more than 95% by weight, the surface coating agent If it is insufficient, surface treatment may not be carried out. However, it is not limited to this.

In an embodiment, the surface coating agent may refer to a material coated on the outer layer of an inorganic pigment, and may serve to improve the ultraviolet ray and blue light blocking effect. The surface coating agent may be one or more selected from the group consisting of triethoxycaprylyl silane, isopropyl titanium triisostearate, stearic acid, and aluminum hydroxide. Specifically, the surface coating agent may be two or more selected from the group consisting of triethoxycaprylyl silane, isopropyl titanium triisostearate, stearic acid, and aluminum hydroxide. When two or more types of surface coating agents selected from the group listed above are used, the effect of improving the ultraviolet ray blocking performance of the composite inorganic particles can be expected due to the interaction of the different surface coating agents.

In the present invention, the surface coating agent may include two or more different types of surface coating agents. When the surface coating agent includes two different types, it may be defined as a first surface coating agent and a second surface coating agent, respectively, and the first surface coating agent (or second surface coating agent) further includes components other than the surface coating component. It can be done, and at least two types of surface coating agents may be included at the same time.

The first surface coating agent may be included in an amount of 1 to 4% by weight, specifically 1 to 3% by weight, based on the total weight of the composite inorganic particles. If the first surface coating agent is included in less than 1% by weight or more than 4% by weight, surface treatment may not be performed properly.

The second surface coating agent may be included in an amount of 0.5 to 9% by weight, specifically 1 to 5% by weight, based on the total weight of the composite inorganic particles. If the second surface coating agent is included in less than 0.5% by weight or more than 9% by weight, surface treatment may not be performed properly.

In an embodiment, the surface of the inorganic pigment may be modified with a first surface coating agent and a second surface coating agent. For example, cerium oxide, an inorganic pigment, may be coated with isopropyl titanium triisostearate as a first surface coating agent and triethoxy caprylyl silane as a second surface coating agent. In an embodiment, when the composite inorganic particles included in the sunscreen are double surface treated with a first surface coating agent and a second surface coating agent, the UV blocking effect and the blue light blocking effect may be formed to be higher than in the case where the UV blocking effect is not otherwise.

In an embodiment, the composite inorganic particles are zinc oxide * triethoxycaprylyl silane, cerium oxide * triethoxycaprylyl silane * isopropyl titanium triisostearate, titanium dioxide * stearic acid * aluminum oxide. It may be at least one type selected from the group consisting of roxides, but is not limited thereto.

The cosmetic composition for sunscreen of the present invention may contain oil.

The oil is, for example, cyclohexasiloxane, propylheptyl caprylate, glyceryl caprylate, caprylyl glycol, caprylyl methicone, butyloctyl salicylate, methyl trimethicone, diphenylsiloxyphenyl tri. It may be one selected from the group consisting of methicone, disiloxane, dimethicone, or mixtures thereof. However, it is not limited to this.

The oil may be included in 10 to 50% by weight, specifically 15 to 45% by weight, based on the total weight of the cosmetic composition.

In addition to the above ingredients, the cosmetic composition for sunscreen according to the present invention includes ingredients included in general cosmetic compositions such as skin conditioning agent, solvent, opacifying agent, bulking agent, preservative, ion sequestering agent, disinfectant, pH adjuster, antioxidant, alcohol, It may include plant extracts, flavorings, cooling agents, thickeners, additives, etc. For example, the skin conditioning agent may be one or more selected from the group consisting of ethylhexylglycerin, propanediol, and sodium hyaluronate, and the solvent may be isododecane, purified water, and 1,2-hexanediol. It may be one or more selected from the group consisting of, the opacifying agent may include polymethyl silsesquioxane, and the bulking agent may include magnesium sulfate, but is not limited thereto.

The mixing amount of the above ingredients is not particularly limited, and can be easily selected by a person skilled in the art within a range that does not impair the purpose and effect of the present invention.

Cosmetic compositions according to embodiments of the present invention can be manufactured into various cosmetics with UV and blue light blocking functions. For example, it can be manufactured into not only sunscreen but also functional cosmetics such as nutritional cream, essence, ampoule, moisturizing cream, and eye cream, or basic cosmetics such as lotion and lotion.

Below, examples and experimental examples are provided to explain the present invention in more detail, but the present invention is not limited thereto.

Experimental Example 1: Comparative experiment according to the mixing ratio of emulsifiers

(1) Preparation of Examples 1 to 3

In order to evaluate the efficacy of the mixing ratio of two different types of emulsifiers, the cosmetic compositions of the examples were prepared by varying the mixing ratio of the first and second emulsifiers, as shown in Table 1. The unit of ingredient content in Table 1 is weight%.

The specific manufacturing method is as follows.

First, the oil component and emulsifier component were placed in a stirrer and stirred at about 100 rpm to 1000 rpm for about 5 to 30 minutes. The emulsifier components were polyglyceryl-3 polydimethylsiloxyethyl dimethicone as the first emulsifier, and a mixture of lauryl polyglyceryl-3 polydimethylsiloxyethyl dimethicone and tocopherol as the second emulsifier, and the oil component was used. Cyclohexasiloxane was used. At this time, the sum of the weight ratio of the first emulsifier and the second emulsifier was maintained at 4.5% by weight, and the weight ratio of the first emulsifier and the second emulsifier was 1:5 (Example 1), 1:0.5 (Example 2) or 1:2 (Example 3), respectively.

Next, the dispersant, sunscreen, solvent, and other ingredients (skin conditioning agent, opacifier, bulking agent, etc.) were slowly added while stirring the stirrer at 1500 rpm under 50°C conditions. Once the addition was completed, the stirring speed was increased to 3500 rpm and 5 It was stirred for another minute. As a dispersant, disteadimonium hectorite was used, and as a UV blocker, a material coated with triethoxycaprylyl silane on the surface of zinc oxide and triethoxycaprylyl silane and isopropyl titanium on cerium oxide. Composite inorganic particles coated with triisostearate were mixed at the weight ratio shown in Table 1 above. Finally, the cosmetic compositions of Examples 1 to 3 were completed.

(2) Preparation of Comparative Examples 1 to 4

A cosmetic composition was prepared in the same manner as in the example, except that the weight ratio of the first and second emulsifiers was varied, or the first or second emulsifiers were mixed separately. Specifically, in Comparative Example 1, only the second emulsifier was added instead of the first emulsifier, and in Comparative Example 2, only the first emulsifier was added. In Comparative Example 3, the first emulsifier and the second emulsifier were added at a weight ratio of 1:0.1, and in Comparative Example 4, they were added at a weight ratio of 1:10 to complete the cosmetic compositions of Comparative Examples 1 to 4. The specific content is as shown in Table 2 below, and the unit of ingredient content in Table 2 is weight%. The remaining ingredients and contents are the same as Example 1.

(3) Evaluation of UV blocking power

The UV protection index of the cosmetic compositions of Examples 1 to 3 and Comparative Examples 1 to 4 was measured to evaluate the blocking power against UV rays. To measure ultraviolet light transmittance, a sample was placed on a polymethyl methacrylate (PMMA HELIO PLATE HD6) plate, referring to the test specifications of COLIPA (European Cosmetics Association)'s method for the In-Vitro determination of UVA protection provided by sunscreen products. It was applied and measured using UV-2000S (Labsphere, Inc. USA). The sample application amount was measured after drying in the dark for about 15 minutes at a rate of 1.3 mg x 22 cm ² = 28.6 mg on a PMMA plate, referring to the 1.3 mg/cm ² mentioned in COLIPA. The transmittance measurement wavelength range was measured from 280 to 400 nm using UV-200S, and the SPF (Sun Protection Factor) value was calculated using SPF 290S Analyzer. A higher SPF index (ultraviolet sun protection factor) means more effective UV protection, and the SPF index was calculated according to Equation 1 below.

[Formula 1]

The measurement results are summarized in Table 3 below.

(4) Evaluation of water resistance and UV protection

The cosmetic compositions of Examples 1 to 3 and Comparative Examples 1 to 4 were evaluated for water resistance and UV blocking power. The above item can evaluate the degree to which the cosmetic composition maintains UV blocking power without being washed away even under conditions where the cosmetic composition is exposed to moisture such as water or sweat. The higher the water-resistant UV-blocking ability, the higher the UV-blocking ability can be maintained even under moisture conditions. In the case of the water-resistant UV-blocking transmittance, the sample was applied to the HD-6 plate and 15 minutes later, it was attached to the bottom of a 1L beaker, 600ml of tap water at 30°C was added, and then the sample was mixed at a rotation speed of 180rpm using an Aji mixer. After stirring for 30 minutes, it was dried for 30 minutes and the SPF value was compared and measured before and after the water resistance test. The SPF value was measured in the same manner as described in the evaluation of UV blocking power. The measurement results are summarized in Table 3 below.

(5) Blue light blocking power evaluation

To evaluate the blue light blocking power of the cosmetic compositions of Examples 1 to 3 and Comparative Examples 1 to 4, the absorption rate of each sample in the blue light wavelength range (400 to 500 nm) was measured. Blue light transmittance measurement was performed by referring to the test method of Method for in-vitro determination of UVA protection, 2011 (COLIPA), and the sample was applied to a polymethyl methacrylate (PMMA HELIO PLATE HD6) plate and used a Spectroradiometer. It was measured using (SPR-01, Luzchem Research Inc. Canada). The sample application amount was set to 1.3 mg x 25 cm ² = 32.5 mg, referring to the 1.3 mg/cm ² mentioned in COLIPA. The light intensity of the sample was measured in an opaque acrylic chamber equipped with a lamp emitting blue light (400-500 nm) and a spectroradiometer and detector to measure the blue light light intensity. The measurement method was to select 15 points on the PMMA plate on which the sample was applied, and scan a total of 15 times for each measurement. This 15-time scanning process was regarded as one measurement, and the measurement was repeated twice for each sample, and this value was taken as the average. The higher the blue light blocking rate (%) of the sample, the more effectively it blocks light in the blue light wavelength range. The blocking rate (%) was calculated according to Equation 2 below:

[Formula 2]

The measurement results are summarized in Table 3 below.

(6) Dispersibility and spreadability evaluation

The cosmetic compositions of Examples 1 to 3 and Comparative Examples 1 to 4 were filled into containers and their dispersibility was evaluated through observation. If the particles of the composition were not agglomerated and were evenly distributed, the dispersibility was evaluated as O, and if the particles were agglomerated or not evenly distributed, the dispersibility was evaluated as X.

In the spreadability evaluation, the degree of spreadability of the cosmetic compositions of Examples 1 to 3 and Comparative Examples 1 to 4 was evaluated using a skin panel test. Specifically, each of the above-prepared cosmetic compositions was rolled onto the skin and tested for applicability when reaching the point where the phase changes, with 10 panel testers evaluating the results with a score of 1 to 5. Spreadability was evaluated by calculating the average of the scores evaluated by the person. The evaluation scale was 5 points - very good, 4 points - good, 3 points - average, 2 points - bad, 1 point - very bad, and the results are shown in Table 3 below.

In the above, dispersibility refers to the degree to which the sunscreen in a cosmetic composition is evenly distributed in the organic solvent without agglomerating. The higher the dispersibility, the better the UV blocking power, skin adhesion, and makeup sustainability can be achieved. In the above, applicability refers to whether the cosmetic composition can be well absorbed into the skin without causing stickiness or wrinkles when applied to the skin. It is an evaluation related to the user's feeling of use, and is an indicator that increases the use value as a cosmetic. It can be.

As shown in Table 3, Examples 1 to 3 containing the first emulsifier and the second emulsifier in a weight ratio of 1:0.5 to 5 showed the best UV blocking performance and blue light blocking performance, and water resistance. It was confirmed that it not only has excellent UV blocking performance, but also has excellent dispersibility and spreadability, providing an excellent feeling of use. In particular, Example 2 has the best UV and blue light blocking performance and also has the best spreadability (5 points), so it can be seen that it can provide a high-quality feeling to the user while also providing a high harmful ray blocking effect.

Meanwhile, referring to the comparative example, it can be seen that when only one type of emulsifier component (the first emulsifier or the second emulsifier) is used, the ultraviolet ray and blue light blocking performance is significantly reduced. Therefore, it can be seen that when two or more types of emulsifiers are mixed as in the examples, the properties of the formulation are improved, spreadability is increased, and the ultraviolet ray and blue light blocking effect is increased. However, in Comparative Examples 3 and 4, in which the weight ratio of the first emulsifier and the second emulsifier was included at a 10-fold difference, it was confirmed that the ultraviolet ray and blue light blocking performance was poor and that it was not suitable for manufacturing cosmetic compositions. In addition, referring to Figure 1, when a cosmetic composition is manufactured with a weight ratio outside the range of the first emulsifier and the second emulsifier specified in the present invention, the layers are separated and the dispersibility is reduced, which also reduces the harmful ray blocking effect. It can be confirmed that this can lead to a decrease together.

Through this, it was confirmed that the weight ratio of the first emulsifier and the second emulsifier is an important factor in the sunscreen cosmetic composition of the present invention.

Experimental Example 2: Comparative experiment according to mixing ratio of emulsifier and dispersant

(1) Preparation of Examples 4 to 7

In order to compare the performance of cosmetic compositions according to the weight ratio of emulsifier and dispersant, the cosmetic compositions of Examples 4 to 7 were prepared by mixing the ingredient contents shown in Table 4 below. The content of the emulsifier was maintained at 5% by weight, and the weight ratio of the emulsifier and dispersant was 1: 0.025 (Example 4), 1: 0.25 (Example 5), 1: 0.15 (Example 6), or 1: 0.5 (Example Each was adjusted to 7). The mixing ratio of the first emulsifier and the second emulsifier was fixed at 1:0.5. The unit of ingredient content in Table 4 is weight%. Table 4 The unit of ingredient content is weight%. The specific manufacturing method is the same as in Experimental Example 1, and the remaining ingredients and contents except for the emulsifier and dispersant are the same as in Example 1.

(2) Preparation of Comparative Examples 5 to 9

The cosmetic compositions of Comparative Examples 5 to 9 were prepared by mixing the ingredient contents shown in Table 5 below. Specifically, in Comparative Example 5, only the dispersant was added without adding an emulsifier, in Comparative Example 6, only the emulsifier was added without adding a dispersant, and in Comparative Examples 7 to 9, the weight ratio of the emulsifier and dispersant was 1:0.0025, respectively (Comparative Example 7), it was adjusted to 1:5 (Comparative Example 8) or 1:2.5 (Comparative Example 9). The mixing ratio of the first and second emulsifiers was fixed at 1:0.5. The unit of ingredient content in Table 5 is weight%. The specific manufacturing method is the same as in Experimental Example 1, and the remaining ingredients and contents except for the emulsifier and dispersant are the same as in Example 1.

(3) Evaluation of UV and blue light blocking power

The cosmetic compositions of Examples 4 to 7 and Comparative Examples 5 to 9 were evaluated for UV blocking power, water-resistant UV blocking power, and blue light blocking power in the same manner as in Experimental Example 1. The evaluation results are summarized in Table 6 below.

(4) Dispersibility and spreadability evaluation

The cosmetic compositions of Examples 4 to 7 and Comparative Examples 5 to 9 were evaluated for dispersibility and spreadability in the same manner as in Experimental Example 1. The evaluation results are summarized in Table 6 below.

As shown in Table 6 and Figure 2, the cosmetic compositions of Examples 4 to 7 containing an emulsifier:dispersant weight ratio in the range of 1:0.025 to 0.5 showed excellent UV blocking power, water-resistant UV blocking power, and blue light blocking power. Additionally, dispersibility and spreadability were measured to be high. On the other hand, in Comparative Example 5, which contained only the dispersant component, performance measurement was not possible because the formulation was not formed due to the absence of the emulsifier component, and even in Comparative Examples 8 and 9, where the weight of the dispersant was 2.5 times more than the weight of the emulsifier, the weight of the dispersant was excessive. As the viscosity increased, it gelled and performance could not be measured. In other words, if an emulsifier is not included or the weight of the dispersant exceeds 2.5 times the weight of the emulsifier, it can be inferred that it may not be suitable for use as a cosmetic because it is difficult to form a formulation and does not effectively block ultraviolet rays or blue light. . On the other hand, in Comparative Example 6, which did not contain a dispersant but only an emulsifier, it was confirmed that the composite inorganic particles were not uniformly dispersed and aggregated, reducing the effect of blocking ultraviolet rays, etc., and the weight part of the dispersant was 0.0025 for 1 part by weight of the emulsifier. Even in the case of Comparative Example 7, the weight of the dispersant was low, and it can be seen from Figure 2 that the composite inorganic particles are not properly dispersed in the organic solvent, and this reduces the ultraviolet ray and blue light blocking effect. In order to manufacture a cosmetic composition to achieve the desired effect in the present invention, it is necessary to appropriately adjust the weight ratio of the emulsifier and dispersant, and the dispersant should be at least 0.003 parts by weight for 1 part by weight of emulsifier, and 2 parts by weight. It can be seen that it is desirable not to exceed it.

Experimental Example 3: Comparative experiment according to the content of emulsifier

(1) Manufactured by varying the content of the first emulsifier

In order to compare the effects according to the content of the first emulsifier, a cosmetic composition was prepared by mixing the ingredient contents listed in Table 7 below. The unit of ingredient content in Table 7 is weight%. The specific manufacturing method is the same as Experimental Example 1, and the remaining ingredients are the same as Example 1.

(2) Manufactured by varying the content of the second emulsifier

In order to compare the effects according to the content of the second emulsifier, a cosmetic composition was prepared by mixing the ingredient contents listed in Table 8 below. The unit of ingredient content in Table 8 is weight%. The specific manufacturing method is the same as Experimental Example 1, and the remaining ingredients are the same as Example 1.

(3) Evaluation of UV and blue light blocking power

The UV blocking power, water-resistant UV blocking power, and blue light blocking power of the Examples and Comparative Examples prepared above were evaluated. The evaluation method is the same as Experiment 1. The evaluation results are summarized in Table 9 below.

(4) Dispersibility and spreadability evaluation

The dispersibility and spreadability of the examples and comparative examples prepared above were evaluated. The evaluation method is the same as Experiment 1. The evaluation results are summarized in Table 9 below.

Referring to Table 9 and Figures 3 and 4, it can be seen that the ultraviolet ray and blue light blocking effect varies depending on the content of the emulsifier, and the dispersibility may also vary. In particular, referring to Figures 3 and 4, it can be seen that the dispersibility is clearly lowered in Comparative Examples 10 and 12 in which the content of the first emulsifier or the content of the second emulsifier is 0.1% by weight. Specifically, if the content of the first emulsifier relative to the total weight of the cosmetic composition is 0.1% by weight or less or 10% by weight or more, the phases may be observed to be separated, or the spreadability may be too low to be suitable for use as a cosmetic, and the total cosmetic composition weight may be In comparison, it was confirmed that if the content of the second emulsifier was less than 0.1% by weight or more than 10% by weight, the phases may be observed to be separated or the formulation may not be formed.

Through this, in order to simultaneously secure the harmful rays (ultraviolet rays, blue light) blocking effect and dispersibility and spreadability desired in the present invention, it is necessary to appropriately maintain the contents of the first emulsifier and the second emulsifier in the cosmetic composition. You can see that

Experimental Example 4: Comparative experiment according to the content of dispersant

(1) Manufactured with different dispersant contents

A cosmetic composition was prepared by mixing the ingredient contents listed in Table 10 below. The unit of ingredient content in Table 10 is weight%. The specific manufacturing method is the same as Experimental Example 1, and the remaining ingredients are the same as Example 1.

(2) Evaluation of UV and blue light blocking power

The UV blocking power, water-resistant UV blocking power, and blue light blocking power of the Examples and Comparative Examples prepared above were evaluated. The evaluation method is the same as Experiment 1. The evaluation results are summarized in Table 11 below.

(3) Dispersibility and spreadability evaluation

The dispersibility and spreadability of the examples and comparative examples prepared above were evaluated. The evaluation method is the same as Experiment 1. The evaluation results are summarized in Table 11 below.

Referring to Table 11 and Figure 5, it can be seen that in order to obtain the harmful ray blocking effect and dispersibility and spreadability desired in the present invention, the dispersant must be added in an appropriate amount. Specifically, if the dispersant content is 0.1% by weight or less, the phase may separate and the harmful ray blocking effect may be significantly reduced, and if the dispersant content is 5% by weight or more, the formulation may not be formed, making it difficult to use as a cosmetic. In particular, the phenomenon of phase separation can be observed in Comparative Example 14, which contains 0.1% by weight of the dispersant. This shows that dispersibility can be maintained only when the content of the dispersant relative to the total weight of the cosmetic composition is adjusted within a certain range. .

Experimental Example 5: Comparative experiment according to the content ratio of composite inorganic particles

(1) Manufacturing and evaluation by varying the content ratio of inorganic pigments

1) Preparation of examples and comparative examples

A cosmetic composition was prepared with the same content of ingredients as in Example 2, but the examples or comparative examples were prepared by varying the content ratio of the inorganic pigment (cerium oxide component) constituting the sunscreen (composite inorganic particle). The unit of ingredient content in Table 12 is weight%. The specific manufacturing method is the same as Experimental Example 1. Specifically, based on the total weight of the composite inorganic particles, the weight% of cerium oxide in Examples 17 to 19 is 93 to 95% by weight, and the weight% of cerium oxide in Comparative Examples 16 to 18 is 96% or more. The content of the surface coating agent was adjusted according to the weight of the cerium oxide to achieve the same weight (100% by weight).

2) UV and blue light blocking evaluation

The UV blocking power, water-resistant UV blocking power, and blue light blocking power of the prepared Examples and Comparative Examples were evaluated, respectively. The specific evaluation method is the same as Experimental Example 1. The evaluation results are summarized in Table 13 below.

Referring to Table 13, it can be seen that the harmful ray blocking effect (ultraviolet ray blocking effect and blue light blocking effect) may vary depending on the content of inorganic pigments in the composite inorganic particles that make up the sunscreen. Specifically, based on the total weight of the composite inorganic particles, if the content of cerium oxide is 93% by weight or more, the harmful ray blocking effect desired in the present invention is maintained high, but if the content of cerium oxide is 96% by weight or more, the particles are relatively As the amount of coating material on the surface decreases, the desired effect in the present invention may not be achieved. Meanwhile, Comparative Examples 16 to 18 provide cosmetic compositions made of composite inorganic particles coated with one type of surface coating agent or uncoated inorganic particles, rather than composite inorganic particles coated with two types of surface coating agents. It can be seen that the composition of the comparative example is less effective in blocking ultraviolet rays and blue light than the composite inorganic particles whose surfaces are coated with two types of surface coating agents. Through this, the composite inorganic particles in the sunscreen must have an inorganic pigment content within a certain range and be coated on the surface with at least two types of surface coating agents to form pigment particles through appropriate surface treatment, thereby providing excellent UV and blue light blocking effects. You can see that it works well.

(2) Manufacturing and evaluation by varying the content ratio of the first surface coating agent

1) Preparation of examples and comparative examples

A cosmetic composition was prepared with the same content as in Example 2, but the examples or comparative examples were prepared by varying the content ratio of the first surface coating agent (isopropyl titanium triisostearate) as shown in Table 14. The unit of ingredient content in Table 14 is weight%. The specific manufacturing method is the same as Experimental Example 1.

2) UV and blue light blocking evaluation

The UV blocking power, water-resistant UV blocking power, and blue light blocking power of the prepared Examples and Comparative Examples were evaluated, respectively. The specific evaluation method is the same as Experimental Example 1. The evaluation results are summarized in Table 15 below.

Referring to Table 15, it can be seen that the harmful ray blocking effect (ultraviolet ray and blue light blocking effect) may vary depending on the content of the first surface coating agent, based on the total weight of the composite inorganic particles. In addition, it can be seen that if the content of the first surface coating agent is more than 5% by weight, the surface of the inorganic particles is not coated smoothly, and the desired effect in the present invention may not be sufficiently achieved. Through this, it can be confirmed that it is necessary to appropriately adjust the content of the first surface coating agent included in the sunscreen.

(3) Manufacturing and evaluation by varying the content ratio of the second surface coating agent

1) Preparation of examples and comparative examples

A cosmetic composition was prepared with the same content as in Example 2, but the examples or comparative examples were prepared as shown in Table 16. The unit of ingredient content in Table 16 is weight%. The specific manufacturing method is the same as Experimental Example 1.

2) UV and blue light blocking evaluation

The UV blocking power, water-resistant UV blocking power, and blue light blocking power of the prepared Examples and Comparative Examples were evaluated, respectively. The specific evaluation method is the same as Experimental Example 1. The evaluation results are summarized in Table 17 below.

Referring to Table 17, it can be seen that the harmful ray blocking effect (ultraviolet and blue light blocking effect) may vary depending on the content of the second surface coating agent in the sunscreen. Specifically, if the content of the second surface coating agent in the composite inorganic particle is less than 0.1% by weight or more than 10% by weight, the surface of the inorganic particle may not be coated smoothly, and the desired effect in the present invention may not be sufficiently achieved. You can see that there is. Through this, it can be confirmed that it is necessary to appropriately adjust the content of the second surface coating agent included in the sunscreen.

As the specific parts of the present invention have been described in detail above, those skilled in the art will understand that these specific techniques are merely preferred embodiments and do not limit the scope of the present invention. It will be obvious. Accordingly, the actual scope of the present invention will be defined by the appended claims and their equivalents.

Claims (16)

In a cosmetic composition for sunscreen,
An emulsifier comprising a first emulsifier and a second emulsifier;
dispersant; and
Contains sunscreen;
The emulsifier and dispersant are included in a weight ratio of 1:0.003 to 2,
The first emulsifier and the second emulsifier include different polyglyceryl-based emulsifiers,
A cosmetic composition for sunscreen, wherein the first emulsifier and the second emulsifier are included in a weight ratio of 1:0.2 to 9. delete According to claim 1,
The first emulsifier includes polyglyceryl-3 polydimethylsiloxyethyl dimethicone,
A cosmetic composition for sunscreen, wherein the second emulsifier includes lauryl polyglyceryl-3 polydimethylsiloxyethyl dimethicone. delete According to claim 1,
The first emulsifier is included in an amount of 0.2 to 9% by weight based on the total weight of the cosmetic composition. According to claim 1,
The second emulsifier is included in an amount of 0.2 to 9% by weight based on the total weight of the cosmetic composition. According to claim 1,
The dispersant is included in an amount of 0.2 to 4.5% by weight based on the total weight of the cosmetic composition. According to claim 1,
A cosmetic composition for blocking ultraviolet rays, wherein the sunscreen is contained in an amount of 0.5 to 50% by weight based on the total weight of the cosmetic composition. According to claim 1,
The sunscreen includes a core portion containing an inorganic pigment; and
A cosmetic composition for blocking ultraviolet rays, comprising complex inorganic particles including a surface coating agent coated on the outer surface of the core portion. According to clause 9,
The inorganic pigment includes at least one selected from the group consisting of zinc oxide, cerium oxide, titanium dioxide, silica, talc, mica, borosilicate, calcium carbonate, and barium sulfate. A cosmetic composition for sunscreen. According to clause 9,
A cosmetic composition for sunscreen, wherein the inorganic pigment is contained in an amount of 50 to 95% by weight based on the total weight of the composite inorganic particles. According to clause 9,
A cosmetic composition for sunscreen, wherein the surface coating agent includes at least one selected from the group consisting of triethoxycaprylyl silane, isopropyl titanium triisostearate, stearic acid, and aluminum hydroxide. According to clause 9,
The composite inorganic particles include a first surface coating agent and a second surface coating agent,
A cosmetic composition for sunscreen, wherein the first surface coating agent is included in an amount of 1 to 4% by weight based on the total weight of the composite inorganic particles. According to claim 13,
A cosmetic composition for blocking ultraviolet rays, wherein the second surface coating agent is included in an amount of 0.5 to 9% by weight based on the total weight of the composite inorganic particles. According to clause 1,
A cosmetic composition for sunscreen, wherein the cosmetic composition further includes oil. According to claim 1,
The cosmetic composition is a cosmetic composition for blocking ultraviolet rays and has excellent ultraviolet ray blocking effect and blue light blocking effect.