Oil-in-water (o / w) cosmetic composition comprising agarose

Abstract

An oil-in-water (O / W) cosmetic composition of the present invention can exhibit excellent elasticity and sufficient hardness by optimal combination of an elastic thickener including agarose and an auxiliary thickener, and thus is suitable for molding into a stick shape or the like. Therefore, the cosmetic composition can offer an excellent sensory feel, and does not collapse even during application, enabling convenient use.

Description

Oil-in-water (O / W) cosmetic composition containing agarose

[0001] The present invention relates to an oil-in-water (O / W) cosmetic composition containing agarose, and more particularly, to an oil-in-water (O / W) cosmetic composition having sufficient hardness by optimally combining agarose and an auxiliary thickener, suitable for implementation in a stick formulation, and having a unique usability.

[0002] Stick-type cosmetics are the most widely used cosmetic type across all age groups, as they are easy to carry and can be applied without the need for separate tools. Generally, stick-type cosmetics are prone to breaking when rubbed against the skin, requiring sufficient hardness. Therefore, the cosmetic compositions used in stick-type cosmetics typically use oil-based or water-in-oil formulations suitable for achieving this hardness.

[0003] Unlike oil-in-water formulations or water-in-oil formulations, the composition of the oil-in-water formulation has less oiliness and can provide a refreshing and cool sensation, and has the advantage of being able to be used on oily or acne-prone skin because it has less oiliness. However, not only is it difficult to implement it in a stick form, but even if it is implemented in a stick form, there is also a technical difficulty in forming a hardness appropriate for rubbing into the skin.

[0004] Accordingly, there is a pressing need to develop oil-in-water formulations with sufficient hardness to enable stick formulations. If the convenience benefits of stick formulations can be reliably applied to oil-in-water cosmetic compositions, stick cosmetics will become more readily available to those with sensitive skin types, such as oily skin. Furthermore, a wider range of functional cosmetics can be manufactured in stick form, giving consumers a wider range of product choices to meet their specific needs.

[0005] Accordingly, the inventors of the present invention completed the present invention by implementing a cosmetic composition in an oil-in-water (O / W) formulation having a hardness suitable for implementation in a stick formulation and excellent usability due to a unique elasticity by using agarose as an elastic thickener and optimally combining auxiliary thickeners.

[0006] The present invention aims to provide a cosmetic composition in an oil-in-water (O / W) formulation having sufficient hardness and suitable for implementation in a stick formulation and having a unique usability.

[0007] 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.

[0008] According to an embodiment of the present invention, an oil-in-water (O / W) cosmetic composition is provided, which comprises an elastic thickener and an auxiliary thickener, wherein the elastic thickener comprises agarose.

[0009] The water-in-oil cosmetic composition of the present invention can form sufficient hardness, so it is suitable for forming into a stick type, etc., and can maintain a stable formulation without collapsing when applied to the skin.

[0010] In addition, the cosmetic composition has excellent elasticity and can provide an excellent feeling of use due to the elasticity.

[0011] In addition, the cosmetic composition may have excellent long-term storage stability due to its low water content, and thus may have excellent marketability.

[0012] In addition, the cosmetic composition has a low melting temperature, making it easy to increase flowability and thus suitable for molding into a desired shape.

[0013] 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.

[0014] Figure 1 shows a photograph taken in Example 1.

[0015] According to an embodiment of the present invention, an oil-in-water (O / W) cosmetic composition is provided, which comprises an elastic thickener and an auxiliary thickener, wherein the elastic thickener comprises agarose.

[0016] Additionally, the auxiliary thickener may include carrageenan and Amorphophallus Konjac Root Extract.

[0017] Additionally, the agarose may be included in an amount of 0.7 to 2.0 wt% based on the total weight of the water-in-oil cosmetic composition.

[0018] Additionally, the carrageenan may be included in an amount of 0.05 to 0.4 wt% based on the total weight of the water-in-oil cosmetic composition.

[0019] Additionally, the konjac root extract may be included in an amount of 0.05 to 0.15 wt% based on the total weight of the water-in-oil cosmetic composition.

[0020] Additionally, the above-mentioned water-based cosmetic composition may further include a sunscreen.

[0021] Additionally, the above-mentioned water-based cosmetic composition may be semi-solid.

[0022] Additionally, the above-mentioned water-based cosmetic composition may be in the form of an elastic gel formulation.

[0023] In addition, the above-mentioned water-based cosmetic composition may be a stick-type cosmetic composition.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention pertains. In general, the nomenclature used herein is well known and commonly used in the art. In addition, when describing embodiments of the present invention, if a detailed description of a related known structure or function is judged to hinder the understanding of the embodiments of the present invention, a detailed description thereof will be omitted. In addition, although embodiments of the present invention will be described below, the technical idea of ​​the present invention is not limited or restricted thereto, and can be modified and implemented in various ways by those skilled in the art.

[0025] When a part in this specification is said to include a certain component, this does not exclude other components, unless otherwise specifically stated, but rather means that other components may be included. In this specification, the term "and / or" includes a combination of multiple related items or any one of multiple related items.

[0026]

[0027] According to an embodiment of the present invention, an oil-in-water (O / W) cosmetic composition is provided, which comprises an elastic thickener and an auxiliary thickener, wherein the elastic thickener comprises agarose. The oil-in-water cosmetic composition according to an embodiment of the present invention has sufficient hardness and a low melting temperature, making it easy to control flowability, and thus may be very suitable for forming into a stick shape or the like. In addition, due to its unique elasticity, the oil-in-water cosmetic composition may provide an excellent feeling of use, such as providing optimal spreadability due to excellent elasticity to the user when applied to the skin.

[0028] Agarose is a natural polysaccharide that can be extracted from seaweed, and is a linear polymer in the form of a chain composed of disaccharide units including D-galactose and 3,6-anhydro-L-galactose. The chain-shaped agarose can form a double helix structure through hydrogen bonds and is stabilized by hydrogen bonds and van der Waals forces. Specifically, in the present invention, agarose can provide elasticity to an oil-in-water cosmetic composition as an elastic thickener. In addition, the agarose chain can form a gel formulation with a three-dimensional network structure, which can play a role in stabilizing the formulation of the cosmetic composition.

[0029] In one embodiment, agarose may be included in an amount of 0.7 to 2.0 wt%, specifically 1.0 to 2.0 wt%, and more specifically 1.0 to 1.5 wt%, based on the total weight of the oil-in-water cosmetic composition. If the agarose is included in an amount of less than 0.7 wt%, the stability of the oil-in-water cosmetic composition formulation over time may be somewhat reduced, and if it is included in an amount of more than 2.0 wt%, the melting temperature may increase, making it difficult to control flowability.

[0030] In this specification, “melting temperature” refers to the temperature at which the gel begins to melt and become runny. If the melting temperature is low, it is easy to secure the flowability of the composition, making it suitable for molding.

[0031]

[0032] In the present invention, the auxiliary thickener can play a role in improving the stability and usability of the formulation. Specifically, it can play a role in reducing the phenomenon of water syneresis and / or maintaining the hardness of the oil-in-water cosmetic composition, thereby improving the stability of the oil-in-water cosmetic composition over time and thereby enhancing its marketability. The present inventors have developed an oil-in-water cosmetic composition that exhibits excellent elasticity, improves processability by securing flowability, and also has excellent stability over time by deriving an optimal combination of auxiliary thickeners in addition to the elastic thickener agarose.

[0033] In this specification, “water-containing phenomenon” means a phenomenon in which the network structure of a water-containing gel shrinks over time and releases solvents such as water contained within the gel.

[0034] In one embodiment, the auxiliary thickener may include carrageenan and Amorphophallus Konjac Root Extract. When both of the above two ingredients are included as auxiliary thickeners, a water-in-oil cosmetic composition with superior elasticity and / or hardness can be obtained.

[0035] In one embodiment, carrageenan may be included in an amount of 0.05 to 0.4 wt%, specifically 0.05 to 0.3 wt%, and more specifically 0.2 to 0.3 wt%, based on the total weight of the oil-in-water cosmetic composition. If the carrageenan is included in an amount of less than 0.05 wt%, the water syneresis phenomenon may be somewhat aggravated, which may increase the amount of moisture loss over time. If the carrageenan is included in an amount of more than 0.4 wt%, elasticity and spreadability may be reduced, resulting in a poor usability.

[0036] In one embodiment, the konjac root extract may be included in an amount of 0.05 to 0.15 wt%, specifically 0.05 to 0.12 wt%, and more specifically 0.07 to 0.12 wt%, based on the total weight of the oil-in-water cosmetic composition. If the konjac root extract is included in an amount of less than 0.05 wt%, the melting temperature may rise slightly, thereby reducing the processability, and if it is included in an amount of more than 0.15 wt%, the long-term stability of the formulation may be reduced.

[0037]

[0038] In one embodiment, the water-soluble cosmetic composition of the present invention may further comprise a sunscreen. The sunscreen may include any organic sunscreen, inorganic sunscreen, and / or organic / inorganic complex sunscreen that can be employed by those skilled in the art. Examples of the above sunscreens include Ethylhexyl Triazone, Diethylamino Hydroxybenzoyl Hexyl Benzoate, Bis-Ethylhexyloxyphenol Methoxyphenyl Triazine, Ethylhexyl Methoxycinnamate, Ethylhexyl Salicylate, Octocrylene, Diethylhexyl Butamido Triazone, Homosalate, Isoamyl p-Methoxycinnamate, Polysilicon-15, At least one of Methylene Bis-Benzotriazolyl Tetramethylbutylphenol, Tris-Biphenyl Triazine, Phenylbenzimidazole Sulfonic Acid, Terephthalylidene Dicamphor Sulfonic Acid, Titanium Dioxide, Bis-Ethylhexyloxyphenol Methoxyphenyl Triazine, and Zinc Oxide may be mentioned, but is not limited thereto, and various sunscreens may be included.

[0039]

[0040] In one embodiment, the water-based cosmetic composition of the present invention may additionally include purified water, polyol, oil, surfactant, moisturizer, preservative, or functional ingredient.

[0041] In one embodiment, the oil may provide hardness and a moisturizing feel to the stick-type cosmetic composition. Examples of the oil may include, but are not limited to, dibutyl adipate, octyldodecanol, caprylic / capric / succinic triglyceride, glyceryl caprylate, coco-caprylate / caprate, butyloctyl salicylate, and sunflower seed oil.

[0042] In one embodiment, the powder may be used to adjust hardness or as a bulking agent. Examples of the powder may include, but are not limited to, silica, synthetic fluorphlogopite, methyl methacrylate crosspolymer, and the like.

[0043] In one embodiment, the surfactant may serve to stabilize the emulsified formulation. Examples of the surfactant may include, but are not limited to, polyglyceryl-6 polyricinoleate, polyglyceryl-4 diisostearate / polyhydroxystearate / sebacate, cetyl PEG / PPG-10 / 1 dimethicone, and lauryl polyglyceryl-3 polydimethylsiloxyethyl dimethicone*tocopherol.

[0044] In one embodiment, the moisturizer can provide moisture to the skin, maintain moisture in the skin, and provide a lasting moisturizing feeling. Examples of the moisturizer include, but are not limited to, caprylyl glycol, butylene glycol, dipropylene glycol, methylpropanediol, pentylene glycol, glycereth-26, sorbitol, and diglycerin.

[0045] In one embodiment, the preservative is used to enhance the effect of preservation, and examples thereof include, but are not limited to, ethylhexylglycerin, 1,2-hexanediol, etc.

[0046] In one embodiment, the functional ingredient may be added by mixing various ingredients depending on the purpose of the cosmetic composition, and may include, for example, a wrinkle improvement agent, a whitening functional ingredient, a pigmentation reduction functional ingredient, a skin soothing functional ingredient, and a sebum or pore management functional ingredient.

[0047] In one embodiment, the water-in-oil cosmetic composition of the present invention may further include a pigment. The color of the water-in-oil cosmetic composition can be adjusted by appropriately blending the pigment according to the intended use.

[0048] In addition, the water-based cosmetic composition of the present invention may additionally include ingredients included in general cosmetic compositions, and may include, for example, wax, powder, emulsion stabilizer, skin conditioning agent, ion sequestering agent, sterilizer, pH regulator, antioxidant, alcohol, plant extract, fragrance, and feel-modifying agent.

[0049] The mixing amount of the above-described components 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.

[0050]

[0051] In one embodiment, the water-in-water cosmetic composition of the present invention may be provided in other formulations that include an oil-in-water (O / W) formulation. For example, it may be provided in the form of a multiple emulsion formulation (such as O / W / O or W / O / W), paste, foam, etc.

[0052] In one embodiment, the oil-in-water cosmetic composition of the present invention may be provided in a stick form. The oil-in-water cosmetic composition can form sufficient hardness, has excellent elasticity, has a low melting temperature, making it easy to control flowability, and also has excellent stability over time, so it is easy to fill and use it in a container like a stick form and can maintain excellent quality for a long time. In addition, by being provided in the stick form, the oil-in-water cosmetic composition can be easily stored and used. For example, it can be manufactured into cosmetics such as sun sticks, sun balms, lipsticks, lip balms, lip glosses, multi-balms, foundations, lip creams, and concealers.

[0053] In a specific embodiment, the oil-in-water cosmetic composition of the present invention may be an elastic gel formulation. The gel formulation may have elasticity due to the restoring force of the gel network, etc., as the agarose forms a gel network through hydrogen bonding and / or van der Waals forces. Accordingly, the cosmetic composition, when applied to the skin, provides a unique feeling of use due to elasticity, and may have a bouncy, jelly-like appearance, thereby evoking an aesthetic appeal from the formulation in consumers.

[0054] In one embodiment, the water-in-oil cosmetic composition of the present invention can be manufactured into a semi-solid form due to its unique elasticity and stability over time. By being manufactured into the semi-solid form, it has a hardness sufficient to maintain its shape, but its shape can be changed according to pressure or temperature changes.

[0055] In one embodiment, the water-based cosmetic composition of the present invention may be a stick-type cosmetic composition for UV protection. The water-based cosmetic composition of the present invention may be provided in the form of, for example, a sun stick or sun balm.

[0056] In a specific embodiment, the water-in-oil cosmetic composition of the present invention may be provided in a semi-solid form as a sunscreen stick product. The sunscreen stick product does not collapse upon application, provides a unique user experience due to its elasticity, and, due to its jelly-like appearance, may arouse aesthetic curiosity or satisfaction in the user.

[0057]

[0058] Hereinafter, examples and experimental examples are presented to explain the present invention more specifically, but the present invention is not limited thereto.

[0059]

[0060] Experimental Example 1. Comparative Experiment According to the Combination of Thickeners

[0061] (1) Manufacture of examples and comparative examples

[0062] In order to compare the effects of the water-soluble cosmetic composition of the present invention depending on the inclusion of a specific thickener, examples and comparative examples having a stick shape in a gel formulation were prepared as shown in Table 1 below. The contents in Table 1 below are in weight %.

[0063]

[0064]

[0065] The specific manufacturing method is as follows.

[0066] The components included in Phase A (water phase) were heated to 80°C or higher, stirred, and mixed uniformly, and the components included in Phase B (oil phase) were heated to 90°C, stirred, and mixed uniformly. Phase B was slowly added to the uniformly stirred Phase A, and homogeneously emulsified for 5 minutes using a HOMOMIXER at 95°C. The emulsified mixture was then filled into a rubber mold, cooled to room temperature, and the solidified contents were applied to a stick container to complete examples and comparative examples.

[0067]

[0068] (2) Property evaluation

[0069] Physical properties were evaluated for examples and comparative examples manufactured with the same ingredients and contents as in Table 1 above. Specifically, flowability, water content, and stability of the formulation were evaluated.

[0070] In terms of flowability, 100 g of the examples and comparative examples were taken and left at 90℃ for 30 minutes, and then the container was tilted to evaluate whether the examples and comparative examples had flowability. If no lumps formed in the sample after 30 minutes, the flowability was evaluated as “excellent”, meaning that molding was easy and the melting temperature was low. If some lumps formed in the sample, the flowability was evaluated as “average”, meaning that molding was possible but there was a significant defect rate and the melting temperature was not low. If many lumps formed in the sample, the flowability was evaluated as “poor”, meaning that molding itself was not easy and the melting temperature was high. If the time for which flowability was long was low, the melting temperature was low, and if the melting temperature was medium, the contents flowed appropriately for filling the container, and if the time for which flowability was short, the melting temperature was high, meaning that the flowability was insufficient and the filling was evaluated as unsuitable.

[0071] In the case of the completion rate, the degree to which the completion phenomenon occurred was measured by leaving the examples and comparative examples for 30 days, and calculated according to the following mathematical formula.

[0072]

[0073]

[0074] A retention rate of 10% or less was evaluated as "low," a retention rate between 10% and 15% was evaluated as "average," and a retention rate exceeding 15% was evaluated as "poor." A lower retention rate corresponds to less moisture loss over time, so a lower retention rate was judged to indicate better physical properties.

[0075] For formulation stability evaluation, examples and comparative examples were left at low temperature (5℃), room temperature (25℃), and high temperature (40℃) for 30 days, and then the degree of change in penetration was measured, the degree of deformation of the formulation appearance was visually observed, and whether the formulation collapsed when applied to the skin was comprehensively evaluated. The penetration was measured using a durometer with a 1 mm diameter pin under the conditions of 30 cm / min and 10 mm depth.

[0076] The evaluation results by the above experimental method are shown in Table 2 below.

[0077]

[0078] (3) Sensory evaluation

[0079] Sensory evaluations were conducted on the Examples and Comparative Examples manufactured with the same ingredients and contents as in Table 1 above. Specifically, ten expert evaluators applied the Examples and Comparative Examples to the entire left arm, and then evaluated the three items of elasticity, cooling sensation, and spreadability using a 5-point scale. Scores closer to 5 indicate superiority.

[0080] For elasticity, the evaluation was focused on whether the elasticity of the formulation was sufficiently felt during application and whether the composition strongly adhered to the skin. For cooling, the evaluation was focused on whether the applied area felt sufficiently moisturized. For spreadability, the evaluation was focused on whether the application was smooth without feeling sticky or sagging.

[0081] Table 2 below shows the evaluation results by the above evaluation method, and Fig. 1 shows a photograph taken of Example 1.

[0082]

[0083]

[0084] According to Table 2 above, in the case of Example 1, which contained agarose as an elastic thickener, carrageenan as an auxiliary thickener, and konjac root extract in appropriate amounts, the water-in-water composition had a low water-in-water ratio of less than 10%, and its formulation stability was also excellent, confirming that the stability of the oil-in-water composition was very excellent over time. In addition, it was confirmed that the melting temperature was low and the flowability was high, making it easy to mold, such as filling into a container. In addition, as shown in the photograph of Fig. 1, the elasticity was excellent, and as a result, a unique feeling of use was realized, and it was confirmed that the spreadability was very excellent, so the feeling of use was excellent, and the excellent cooling sensation of the oil-in-water formulation was also confirmed to be maintained. On the other hand, according to Comparative Examples 1 to 4 that contained only agarose and did not include an auxiliary thickener, as the content of the elastic thickener increased, the elasticity improved, and it was confirmed that items such as the water-release rate gradually improved. However, as confirmed in Comparative Examples 1 and 2, the flowability was very poor to the extent that molding was impossible, and the stability was also confirmed to be poor compared to the case where an auxiliary thickener was used, such as some of the formulations being torn when applied. In the case of Comparative Examples 5 and 6 that did not include any of the auxiliary thickeners, the penetration rate increased significantly after storage compared to the examples, and the formulation stability was confirmed to be poor, and the flowability was somewhat reduced or the water-release rate was high, resulting in poor marketability. In particular, in the case of Comparative Example 7 that did not include agarose, the formulation completely collapsed upon application, showing very poor formulation stability to the extent that application was impossible, no elasticity was provided at all, the spreadability was very poor, and the cooling sensation was not realized.

[0085] Therefore, it was confirmed that including both a specific elastic thickener and an auxiliary thickener is an important component in implementing the water-in-oil cosmetic composition of the present invention.

[0086]

[0087] Experimental Example 2. Comparative Experiment According to Thickener Content

[0088] (1) Manufacturing of comparative examples

[0089] In order to confirm the optimal content of the elastic thickener and auxiliary thickener in the present invention, comparative examples were prepared as shown in Table 3 below using the same manufacturing method as Experimental Example 1. Specifically, based on Example 1, the content of one of the three thickeners was changed, and all other components and contents were kept the same. The unit in Table 3 is weight%.

[0090]

[0091]

[0092] (2) Property evaluation

[0093] For the comparative example manufactured with the same ingredients and contents as in Table 3 above, the physical properties were evaluated in the same manner as in Experimental Example 1 above, and the results are shown in Table 4 below.

[0094]

[0095] (3) Sensory evaluation

[0096] For the comparative example manufactured with the same ingredients and contents as in Table 3 above, a sensory evaluation was conducted using the same method as in Experimental Example 1 above, and the results are shown in Table 4 below.

[0097]

[0098]

[0099] According to Table 4 above, Comparative Example 8, which contained less than the appropriate amount of the auxiliary thickener konjac root extract, was confirmed to have somewhat poor flowability and formulation stability, and Comparative Example 9, which contained more than the appropriate amount of konjac root extract, had poor formulation stability. Next, Comparative Example 10, which contained less than the appropriate amount of the auxiliary thickener carrageenan, was confirmed to have a severe water syneresis phenomenon compared to the examples, resulting in a decline in marketability over time, and Comparative Example 11, which contained an excessive amount of carrageenan, was confirmed to have good physical properties such as water syneresis and flowability, but somewhat reduced elasticity and spreadability, and also insufficient cooling sensation. Comparative Example 12, which contained less than the appropriate amount of agarose, showed very poor formulation stability as the formulation deteriorated and collapsed, and all three items of the sensory evaluation received very low scores, confirming that the elasticity was significantly lacking. Comparative Example 13, which contained more than the appropriate amount of agarose, showed poor flowability, making it difficult to shape, and slightly lacking spreadability.

[0100] Therefore, it was confirmed that including a specific elastic thickener and auxiliary thickener in an appropriate amount is an important component in implementing the water-in-oil cosmetic composition of the present invention.

[0101]

[0102] While specific aspects of the present invention have been described in detail above, it will be apparent to those skilled in the art that these specific descriptions merely represent preferred embodiments and are not intended to limit the scope of the present invention. Therefore, the substantial scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. In an oil-in-water (O / W) cosmetic composition, Contains elastic thickeners and auxiliary thickeners, A water-in-oil cosmetic composition comprising the elastic viscosity increasing agent agarose.

2. In paragraph 1, A water-in-oil cosmetic composition comprising the above auxiliary thickener, carrageenan and amorphophallus konjac root extract.

3. In paragraph 1, A water-in-oil cosmetic composition, wherein the agarose is contained in an amount of 0.7 to 2.0 wt% based on the total weight of the water-in-oil cosmetic composition.

4. In paragraph 2, A water-in-oil cosmetic composition, wherein the carrageenan is contained in an amount of 0.05 to 0.4 wt% based on the total weight of the water-in-oil cosmetic composition.

5. In paragraph 2, A water-in-oil cosmetic composition, wherein the konjac root extract is contained in an amount of 0.05 to 0.15 wt% based on the total weight of the water-in-oil cosmetic composition.

6. In paragraph 1, The above-mentioned water-based cosmetic composition further comprises a sunscreen.

7. In paragraph 1, The above-mentioned water-in-oil cosmetic composition is characterized in that it is a semi-solid.

8. In paragraph 1, The above-mentioned water-based cosmetic composition is characterized in that it is a gel formulation having elasticity.

9. In paragraph 1, The above-mentioned water-based cosmetic composition is characterized in that it is a stick-type cosmetic composition.

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