Cosmetic composition

Abstract

To provide a viscous cosmetic composition that is substantially free of ethanol and offers a sensation of moisture and quick blending with the skin upon application.SOLUTION: A cosmetic composition contains agar, diglycerol, and water, where the ethanol content constitutes 1 mass% or less of the total mass of the cosmetic composition, and the cosmetic composition has a viscosity of 10 mPa s to 400 mPa s at 25°C.SELECTED DRAWING: None

Description

[Technical field]

[0001] The present disclosure relates to cosmetic compositions. [Background technology]

[0002] In recent years, consumer preferences for cosmetics that are applied directly to the skin (for example, lotions) have become more diverse. Product development is also becoming more diverse, as various aspects such as the effectiveness of active ingredients, characteristic usability (feeling of crumbling when used, compatibility with the skin, etc.), product appearance, product operability, etc. can motivate consumers to purchase products.

[0003] For example, Patent Document 1 describes a composition applicable to external skin preparations such as cosmetics, which "contains one or more polysaccharides (A) that exhibit non-Bingham fluid behavior when in a 0.005-0.4 wt % aqueous solution at just below 20°C, and one or more polysaccharides (B) that exhibit Newtonian fluid behavior or pseudoplastic fluid behavior when in a 0.005-0.4 wt % aqueous solution at just below 20°C, and has a viscosity of 2,500 mPa s or less when measured with a B-type viscometer at 20°C." This composition is said to have a feeling of crumbling when used. Patent Document 2 describes a cosmetic preparation characterized in that "powder-containing agar gel particles having an average particle size of 0.5 to 10 mm are dispersed in an aqueous medium containing one or more types selected from carboxyvinyl polymers and alkyl-modified carboxyvinyl polymers, and natural gums." This cosmetic preparation is said to spread evenly on the skin and to have a good skin compatibility. Patent Document 3 describes a "gel composition containing (A) agar, (B) xanthan gum, (C) locust bean gum, and (D) water." This gel composition is said to be capable of being filled into a normal cosmetic sprayer such as a mist dispenser. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent Publication No. 2022-85361 [Patent Document 2] JP 2014-181224 A [Patent Document 3] JP 2013-13943 A Summary of the Invention [Problem to be solved by the invention]

[0005] 2. Description of the Related Art Cosmetic compositions that focus on a particular feeling of use or operability have been widely developed. However, it has been technically difficult to realize a cosmetic composition that combines two fundamentally contradictory usability characteristics, namely, "moisturizing sensation" and "penetration sensation (i.e., quick skin absorption)." From the viewpoint of creating a cosmetic composition that allows the user to experience "quick absorption into the skin," a widely known method is to add a volatile solvent such as ethanol to the cosmetic composition, which gives the user a sensation of rapid penetration when the cosmetic composition is applied to the skin. However, in order to accommodate users who are hypersensitive to ethanol, there is a demand for a cosmetic composition that can be formulated to contain as little ethanol as possible. Furthermore, from the viewpoints of appearance properties that evoke a moisturizing feeling in the user and operability when taking it in the hands for application, there is also a high demand for cosmetic compositions that have a viscosity.

[0006] An object of one embodiment of the present disclosure is to provide a cosmetic composition that is viscous, substantially free of ethanol, and that provides a feeling of moisture and quick skin absorption when applied to the skin. [Means for solving the problem]

[0007] The present disclosure includes the following aspects. [1] A cosmetic composition comprising agar, diglycerin, and water, wherein the ethanol content is 1 mass% or less relative to the total mass of the cosmetic composition, and the viscosity at 25°C is 10 mPa s to 400 mPa s. [2] The cosmetic composition according to [1], wherein the content of agar is 0.1% by mass to 1.5% by mass, based on the total mass of the cosmetic composition. [3] The cosmetic composition according to [1] or [2], wherein the diglycerin content is 3.0% by mass to 40.0% by mass, based on the total mass of the cosmetic composition. [4] The cosmetic composition according to any one of [1] to [3], wherein the diglycerin content is 3.0% by mass to 30% by mass relative to the total mass of the cosmetic composition, and the diglycerin content ratio to agar is 5 to 400 by mass. [5] The cosmetic composition according to any one of [1] to [4], further comprising an anti-inflammatory component, the anti-inflammatory component comprising at least one selected from the group consisting of allantoin, dipotassium glycyrrhizinate, and tranexamic acid. [6] The cosmetic composition according to [5], wherein the ratio of the anti-inflammatory ingredient to the agar is 0.03 to 20 by mass. [7] The cosmetic composition according to any one of [1] to [6], which is a lotion. Effect of the Invention

[0008] According to one embodiment of the present disclosure, there is provided a cosmetic composition that is viscous, substantially free of ethanol, and that provides a feeling of moisture and quick skin absorption when applied to the skin. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] An example of an embodiment of the cosmetic composition of the present disclosure will be described in detail below. The following description of the requirements may be based on a representative embodiment of the present disclosure, but the present disclosure is not limited to such an embodiment, and can be modified as appropriate within the scope of the purpose of the present disclosure.

[0010] In the present disclosure, a numerical range indicated using "to" means a range that includes the numerical values ​​before and after "to" as the lower limit and upper limit, respectively. In the numerical ranges described in the present disclosure, the upper or lower limit value described in a certain numerical range may be replaced with the upper or lower limit value of another numerical range described in the present disclosure. In addition, in the numerical ranges described in the present disclosure, the upper or lower limit value described in a certain numerical range may be replaced with a value shown in the examples.

[0011] In the present disclosure, the amount of each component in a cosmetic composition means, when a plurality of substances corresponding to each component are present in the cosmetic composition, the total amount of the plurality of substances present in the cosmetic composition, unless otherwise specified. In the present disclosure, combinations of two or more preferred embodiments are more preferred embodiments.

[0012] In the present disclosure, "mass %" and "weight %" are synonymous. In the present disclosure, the term "process" refers not only to an independent process, but also to a process that cannot be clearly distinguished from other processes, as long as the intended purpose of the process is achieved.

[0013] [Cosmetic composition] The cosmetic composition according to the present disclosure contains agar, diglycerin, and water, has an ethanol content of 1 mass % or less relative to the total mass of the cosmetic composition, and has a viscosity at 25°C of 10 mPa·s to 400 mPa·s.

[0014] The cosmetic composition according to the present disclosure contains agar, diglycerin, and water, has an ethanol content of 1 mass % or less relative to the total mass of the cosmetic composition, and has a viscosity of 10 mPa·s to 400 mPa·s at 25°C, so that the cosmetic composition is thick and substantially free of ethanol, and when applied to the skin, it provides a feeling of moisture and quick absorption by the skin. On the other hand, Patent Documents 1 to 3 do not contemplate such compositions.

[0015] In the present disclosure, whether or not a cosmetic composition has viscosity is determined by visually observing the appearance of the cosmetic composition. Specifically, the presence or absence of viscosity is determined by the method described in the Examples below.

[0016] In the cosmetic composition according to the present disclosure, the content of ethanol is 1% by mass or less relative to the total mass of the cosmetic composition, which means that the cosmetic composition is substantially free of ethanol. That is, in the present disclosure, "substantially free of ethanol" means that the content of ethanol is 0% by mass, or more than 0% by mass and 1% by mass or less relative to the total mass of the cosmetic composition.

[0017] The cosmetic composition according to the present disclosure has an ethanol content of 1 mass % or less relative to the total mass of the cosmetic composition, which makes it possible to design a formulation that contains as little ethanol as possible, and can also be used by users who are sensitive to ethanol.

[0018] (A) Agar The cosmetic composition according to the present disclosure contains agar. Agar can function as a thickening agent in the cosmetic composition according to the present disclosure.

[0019] The cosmetic composition according to the present disclosure may contain only one type of agar, or may contain two or more types of agar.

[0020] The agar is not particularly limited as long as it is an agar that is commonly used in medicines, quasi-drugs, and cosmetics.

[0021] For example, the agar has a jelly strength of 10 g / cm 2 ~900g / cm 2 Agar having a jelly strength of 50 g / cm can be preferably used. 2 ~250g / cm 2 In one embodiment, the agar has a jelly strength of 80 g / cm. 2 ~250g / cm 2 The agar may be an agar having a structure as described above.

[0022] Agar jelly strength (g / cm 2) is expressed as jelly strength according to the Nikkansui method. Jelly strength according to the Nikkansui method is a value measured using a Nikkansui method jelly strength measuring device adopted by the Japan Agar Manufacturing Fisheries Association. A 1.5% agar solution is left at 20°C for 15 hours to solidify the gel, and the gel is measured over a surface area of ​​1cm. 2 This refers to the maximum load (g) that the impact can withstand for 20 seconds.

[0023] Agar can be obtained as a commercial product. When a commercial product is used as the agar, the jelly strength is determined according to the catalog value.

[0024] Examples of commercially available products include Ina Agar AX-30, AX-100, AX-200, BX-100, BX-200, CS-120, UX-30, UX-100, UX-200, Ina, SV-100, USV-100, TR-100, UTR-100, CS-320, CS-310, CS-6, CS-7, CS-8, CS-83, CS-33, CS-200, CS-166, CS-377, and Calicolican (all from Ina Food Industry Co., Ltd.).

[0025] From the perspective of the feel when applied to the skin (i.e., the balance between a moisturizing feeling and quick absorption by the skin) UX-100 (gel strength: 80g / cm 2 ~120g / cm 2 ), UX-200 (jelly strength: 180g / cm 2 ~220g / cm 2 ), CS-120 (jelly strength: 150g / cm 2 ~250g / cm 2 ), CS-320 (jelly strength: 150g / cm 2 ~250g / cm 2 ), and CS-310 (jelly strength: 80g / cm 2 ~120g / cm 2 ) is preferred.

[0026] In order to prevent the cosmetic composition from turning yellowish due to the inclusion of agar, SV-100 (jelly strength: 50 g / cm 2~150g / cm 2 ), USV-100 (jelly strength: 50g / cm 2 ~150g / cm 2 ), TR-100 (jelly strength: 50g / cm 2 ~150g / cm 2 ), UTR-100 (jelly strength: 50g / cm 2 ~150g / cm 2 ), CS-166 (jelly strength: 50g / cm 2 ~150g / cm 2 ), and CS-377 (jelly strength: 50g / cm 2 ~150g / cm 2 ) is preferred.

[0027] The content of agar is not particularly limited, but from the viewpoint of imparting viscosity and achieving both a moisturizing feeling and quick skin compatibility, it is preferably 0.1% by mass to 1.5% by mass, more preferably 0.2% by mass to 1.0% by mass, and particularly preferably 0.3% by mass to 0.8% by mass, based on the total mass of the cosmetic composition. In one embodiment, the content of agar may be 0.3% by mass to 0.6% by mass. The content of agar in the above range also contributes to an appearance reminiscent of a moisturizing feeling and a viscosity that improves operability during use.

[0028] [(B) Diglycerin] The cosmetic composition according to the present disclosure contains diglycerin. Diglycerin can function as a moisturizing agent.

[0029] Diglycerin is a compound represented by the molecular formula: O[CH2CH(OH)CH2OH]2, and is not particularly limited as long as it is a diglycerin that is commonly used in medicines, quasi-drugs, and cosmetics.

[0030] Diglycerin is available as a commercially available product, such as Diglycerin 801 (Sakamoto Pharmaceutical Co., Ltd.), Diglycerin S (Sakamoto Pharmaceutical Co., Ltd.), and Unigly G-2 (NOF Corporation).

[0031] The content of diglycerin is not particularly limited, but from the viewpoint of achieving both moisturizing feeling and quick skin compatibility and suppressing sticky feeling, it is preferably 3.0% by mass to 40% by mass, more preferably 3.0% by mass to 30% by mass, and particularly preferably 15% by mass to 30% by mass, based on the total mass of the cosmetic composition. In one embodiment, the content of diglycerin may be 20% by mass to 30% by mass.

[0032] In one embodiment of the cosmetic composition according to the present disclosure, from the viewpoint of achieving both a moist feeling and quick skin compatibility and suppressing a sticky feeling, the content of diglycerin is 3.0% by mass to 30% by mass relative to the total mass of the cosmetic composition, and the content ratio of diglycerin to agar ((B) / (A)) is preferably 2.0 to 4000 by mass. The content ratio of diglycerin to agar ((B) / (A)) is more preferably 5 to 400 by mass, and particularly preferably 25 to 150 by mass. In one embodiment, the content ratio of diglycerin to agar ((B) / (A)) may be 50 to 150 by mass.

[0033] <Other polyhydric alcohols> The cosmetic composition according to the present disclosure may contain, in addition to diglycerin, another polyhydric alcohol other than diglycerin (hereinafter, also referred to as "other polyhydric alcohol"). The other polyhydric alcohol may be a component that functions as a moisturizing agent.

[0034] When a cosmetic composition contains only other polyhydric alcohols that are also widely used as moisturizers, it tends not to be possible to achieve both a moist feeling and quick skin compatibility. In contrast, in one embodiment of the cosmetic composition according to the present disclosure, by containing agar, diglycerin, and other polyhydric alcohols, it is possible to achieve both a moist feeling and quick skin compatibility.

[0035] When the cosmetic composition according to the present disclosure contains other polyhydric alcohols, the cosmetic composition may contain only one type of other polyhydric alcohol, or may contain two or more types of other polyhydric alcohols.

[0036] There are no particular limitations on the other polyhydric alcohols, so long as they are polyhydric alcohols that are commonly used in medicines, quasi-drugs, and cosmetics.

[0037] Other polyhydric alcohols include, for example, glycerin, 1,3-propanediol, dipropylene glycol, 1,3-butylene glycol, and polyethylene glycol.

[0038] The content of the other polyhydric alcohol can be appropriately set depending on the purpose.

[0039] [(C)Water] The cosmetic composition according to the present disclosure contains water. The water is not particularly limited as long as it is usable in cosmetics, for example. Specific examples of water include natural water, purified water, distilled water, ion-exchanged water, pure water, and ultrapure water (eg, Milli-Q water). As the water, for example, from the viewpoint of having few impurities, purified water, distilled water, ion-exchanged water, pure water, or ultrapure water is preferable.

[0040] The content of water in the cosmetic composition according to the present disclosure is not particularly limited, but is preferably, for example, 50% by mass to 99% by mass relative to the total mass of the cosmetic composition.

[0041] [(D) Anti-inflammatory component] The cosmetic composition according to the present disclosure may further contain an anti-inflammatory component. The cosmetic composition according to the present disclosure may contain only one type of anti-inflammatory component, or may contain two or more types of anti-inflammatory components.

[0042] Cosmetic compositions containing an anti-inflammatory component may cause a user to feel a sticky feeling when applied to the skin, and it has been technically difficult for conventional cosmetic compositions to contain an anti-inflammatory component and suppress the sticky feeling. In contrast, the cosmetic composition according to the present disclosure, even when further containing an anti-inflammatory component, provides a feeling of moisture and quick skin compatibility when applied to the skin, and can suppress the sticky feeling.

[0043] The anti-inflammatory component is not particularly limited as long as it is an anti-inflammatory component that is commonly used in medicines, quasi-drugs, and cosmetics. Examples of the anti-inflammatory component include allantoin, dipotassium glycyrrhizinate, tranexamic acid, stearyl glycyrrhetinate, and nicotinamide, and it is preferable to use at least one selected from the group consisting of allantoin, dipotassium glycyrrhizinate, and tranexamic acid.

[0044] Commercially available allantoin products can be used. Examples of commercially available allantoin products include RonaCare (registered trademark) Allantoin (Merck), Allantoin (Permakem Asia Co., Ltd.), and Allantoin (Kawaken Fine Chemical Co., Ltd.).

[0045] As dipotassium glycyrrhizinate, commercially available products can be used. Examples of commercially available dipotassium glycyrrhizinate include Tonoharaki dipotassium glycyrrhizinate (Maruzen Pharmaceutical Co., Ltd.).

[0046] As the tranexamic acid, commercially available products can be used. Examples of commercially available products of tranexamic acid include Tranexamic Acid (Maruzen Pharmaceutical Co., Ltd.) and Tranexamic Acid (Nippon Fine Chemical Co., Ltd.).

[0047] The total content of the anti-inflammatory components in the cosmetic composition according to the present disclosure is preferably 0.05% by mass to 5.0% by mass relative to the total mass of the cosmetic composition.

[0048] When the cosmetic composition according to the present disclosure contains allantoin as an anti-inflammatory component, the content of allantoin is not particularly limited, but is preferably 0.05% by mass to 0.2% by mass relative to the total mass of the cosmetic composition.

[0049] When the cosmetic composition according to the present disclosure contains dipotassium glycyrrhizinate as an anti-inflammatory component, the content of dipotassium glycyrrhizinate is not particularly limited, but is preferably 0.05% by mass to 0.5% by mass relative to the total mass of the cosmetic composition.

[0050] When the cosmetic composition according to the present disclosure contains tranexamic acid as an anti-inflammatory ingredient, the content of tranexamic acid is not particularly limited, but is preferably 0.05% by mass to 2% by mass relative to the total mass of the cosmetic composition.

[0051] When the cosmetic composition according to the present disclosure contains an anti-inflammatory component, from the viewpoint of suppressing stickiness, the content ratio of the anti-inflammatory component to the agar ((D) / (A)) is preferably 0.03 to 20, and more preferably 0.05 to 4.0, by mass. In one embodiment, the content ratio of the anti-inflammatory component to the agar ((D) / (A)) may be 0.10 to 4.0, by mass.

[0052] [Other added ingredients] The cosmetic composition of the present disclosure may contain, as necessary, additive components (hereinafter also simply referred to as "additive components") that are commonly used in cosmetics, quasi-drugs, and pharmaceuticals.

[0053] Examples of additive components include functional components that exhibit useful beauty effects (e.g., moisturizing effects, skin conditioning effects, etc.) when used in a cosmetic composition. Other additive components include surfactants, phenoxyethanol, carotenoids such as astaxanthin, ceramides, preservatives such as ethylhexylglycerin, vitamin E such as tocopherol, colorants, thickeners, pH adjusters (e.g., potassium hydroxide, sodium hydroxide, hydrochloric acid, etc.), buffers, fragrances, antibacterial agents, ultraviolet absorbers, active oxygen removers, antimicrobial agents, minerals, etc.

[0054] When the cosmetic composition according to the present disclosure contains an additive component, it may contain only one type of additive component, or it may contain two or more types of additive components.

[0055] When the cosmetic composition according to the present disclosure contains an additive component, the content of the additive component is not particularly limited and can be set appropriately depending on the purpose.

[0056] [Ethanol content] The cosmetic composition according to the present disclosure has an ethanol content of 1% by mass or less, preferably 0% by mass to 0.5% by mass, based on the total mass of the cosmetic composition, and more preferably 0% by mass, based on the total mass of the cosmetic composition.

[0057] [Properties of the cosmetic composition] <Viscosity> The cosmetic composition according to the present disclosure has a viscosity of 10 mPa·s to 400 mPa·s at 25° C. From the viewpoints of an appearance that evokes a moisturizing feeling when the cosmetic composition is visually recognized, and operability when used, the viscosity of the cosmetic composition at 25° C. is preferably 20 mPa·s to 200 mPa·s, and more preferably 20 mPa·s to 100 mPa·s.

[0058] In the present disclosure, the viscosity of the cosmetic composition is a value measured using a vibration viscometer in an environment of 25°C. As the vibration viscometer, a vibration viscometer (model: VM-10A) manufactured by Sekonic Corporation can be used.

[0059] [Uses of the cosmetic composition] The cosmetic composition according to the present disclosure can be applied as a cosmetic or a quasi-drug. The cosmetic composition according to the present disclosure can be suitably used for skin care, body care, scalp care, and the like. The cosmetic composition according to the present disclosure is particularly suitable as a lotion. In other words, the cosmetic composition according to the present disclosure is preferably a lotion.

[0060] [Method for producing cosmetic composition] The method for producing the cosmetic composition according to the present disclosure is not particularly limited. The cosmetic composition according to the present disclosure can be obtained using agar, water, diglycerin, and, if necessary, other components such as an anti-inflammatory component, according to a known method for producing a cosmetic composition.

[0061] One embodiment of a suitable method for producing the cosmetic preparation of the present disclosure is a method in which agar, water, diglycerin, and other components used as necessary (e.g., other polyhydric alcohols) are mixed by stirring at, for example, 80°C (hereinafter, appropriately referred to as the "mixing step") to obtain a mixture, and then other components used as necessary, such as an anti-inflammatory component, are added to the mixture.

[0062] Hereinafter, an example of a suitable method for producing the cosmetic composition according to the present disclosure will be described, but a description of matters common to the cosmetic compositions already described, such as matters related to the components of the cosmetic composition and their amounts, will be omitted.

[0063] [Mixing process] In the mixing step, agar, water, and diglycerin are added to a specified container, heated to 80° C., and then stirred and mixed. The method for mixing these components is not particularly limited. As described above, in this step, other components such as other polyhydric alcohols, which are used as necessary, may be blended and stirred and mixed.

[0064] In the mixing step, for example, agar, water, and diglycerin may be mixed together, or agar and water, and diglycerin and water may be separately stirred to prepare mixed liquids, and then the two resulting mixed liquids may be mixed.

[0065] The mixing step is not limited to the above-mentioned method. In the mixing step, the anti-inflammatory component may be added together with agar, diglycerin, and water, and mixed by stirring.

[0066] The mixing means is not particularly limited, and any commercially available mixing means may be used. Examples of the mixing means include a stirrer, a paddle mixer, an impeller mixer, a homomixer, a dispersing mixer, an ultra mixer, a high-pressure homogenizer, an ultrasonic homogenizer, etc. Among these, the mixing means is preferably at least one selected from the group consisting of a homomixer and a dispersing mixer.

[0067] In the mixing step, the temperature at which the agar, water, and diglycerin are mixed is preferably set to 70° C. to 90° C. When a polyhydric alcohol or the like is used as the other component, the agar, diglycerin, water, and polyhydric alcohol or the like are preferably mixed in this step at 70° C. to 90° C. In this way, the temperature at which the other components are mixed is not particularly limited and can be set appropriately depending on the types of the components to be mixed, etc.

[0068] The stirring conditions for mixing the components are not particularly limited as long as the components can be mixed sufficiently, and can be appropriately set according to the mixing means. For example, when a homomixer is used as the mixing means, the components can be usually stirred at 500 rpm (revolutions per minute; the same applies below) to 8000 rpm for 5 to 60 minutes. The method for producing a cosmetic composition according to the present disclosure may include steps other than the mixing step (so-called other steps) as necessary.

[0069] [Other steps] Examples of other steps include a degassing step, a heat sterilization step, a cooling step, a removal step, etc. For the degassing step, the heat sterilization step, the cooling step, the removal step, etc., methods known in the art may be used. EXAMPLES

[0070] The cosmetic composition according to the present disclosure will be described in more detail below with reference to examples. However, the cosmetic composition according to the present disclosure is not limited to the following examples as long as it does not deviate from the gist of the present disclosure.

[0071] [Preparation of cosmetic composition] [Examples 1 to 6, Comparative Examples 1 to 2] The agar described in the composition column of Table 1 below was mixed with 50 times the amount of water relative to the agar, and the mixture was heated to 80°C in a water bath, and then stirred at 5000 rpm for 15 minutes using a homomixer (model name: homomixer MARK II 2.5 type, Primix Corporation). Next, the mixture of agar and water was mixed with each component other than the agar described in the composition column of Table 1 and the remaining water, and further stirred at 3000 rpm for 10 minutes, and then cooled to 30°C. Water was further added to the cooled mixture so that the total amount was 100% by mass, and then stirred at 3000 rpm for 3 minutes using the homomixer. Next, the stirred mixture was vacuum degassed to obtain cosmetic compositions of Examples 1 to 6 and Comparative Examples 1 to 2.

[0072] [Examples 7 to 12, 21] The cosmetic compositions of Examples 7 to 12 and 21 were obtained in the same manner as in Example 3, except that the composition of the cosmetic composition in Example 3 was changed to the composition shown in Tables 2 and 3 below.

[0073] [Examples 13 to 20] The agar listed in the composition column of Table 3 below was mixed with 50 times the amount of water relative to the agar, heated to 80°C in a water bath, and then stirred at 5000 rpm for 15 minutes using a homomixer (model name: homomixer MARK II 2.5 type, Primix Corporation). Separately, component (D) listed in the composition column of Table 3 was mixed with 10 times the amount of water relative to component (D), and stirred at 70°C for 5 minutes to dissolve component (D), thereby preparing a component (D) solution. Next, the mixture of agar and water was mixed with diglycerin and the remaining water shown in the composition column of Table 3, and further stirred at 3000 rpm for 10 minutes, and then cooled to 30° C. The component (D) solution prepared above was added to the cooled mixture, and water was further added so that the total amount was 100 mass %, and then stirred at 3000 rpm for 3 minutes using the homomixer. Next, the stirred mixture was vacuum degassed to obtain the cosmetic compositions of Examples 13 to 20.

[0074] Example 22 The agar described in the composition column of Table 3 below was mixed with 50 times the amount of water relative to the agar, and the mixture was heated to 80°C in a water bath, and then stirred at 5000 rpm for 15 minutes using a homomixer (model name: homomixer MARK II 2.5 type, Primix Corporation). Next, the mixture of agar and water was mixed with diglycerin described in the composition column of Table 3 and the remaining water, and further stirred at 3000 rpm for 10 minutes, cooled to 30°C, and then ethanol was added, and further water was added so that the total amount was 100% by mass, and then stirred at 3000 rpm for 3 minutes using the homomixer. Next, the stirred mixture was vacuum degassed to obtain the cosmetic composition of Example 22.

[0075] [Comparative Examples 3 to 8] The polysaccharide or synthetic polymer described in the composition column of Table 4 below was mixed with 50 times the amount of water, and the mixture was heated to 80°C in a water bath, and then stirred at 5000 rpm for 15 minutes using a homomixer (model name: homomixer MARK II 2.5 type, Primix Corporation). Next, the mixture of polysaccharide or synthetic polymer and water was mixed with each component described in the composition column of Table 4 and the remaining water, and further stirred at 3000 rpm for 10 minutes, and then cooled to 30°C. Water was further added to the cooled mixture so that the total amount was 100% by mass, and then stirred at 3000 rpm for 3 minutes using the homomixer. Next, the stirred mixture was vacuum degassed to obtain cosmetic compositions of Comparative Examples 3 to 8.

[0076] Comparative Examples 9 to 12 The cosmetic compositions of Comparative Examples 9 to 12 were obtained in the same manner as in Example 1, except that the composition of the cosmetic composition in Example 1 was changed to the composition shown in Table 5 below.

[0077] The amount of each component listed in the composition column in Tables 1 to 5 is in "mass %", and the amount of water is adjusted so that the total amount of each composition is 100 mass %.

[0078] In Tables 1 to 5, if a column for each component is left blank, it means that the component in that column is not contained.

[0079] In Tables 1 to 5, "-" in the columns "Ratio of diglycerin to agar" and "Ratio of anti-inflammatory agent to agar" means that the value in that column cannot be calculated.

[0080] In Table 1, "-" in the evaluation column means that the evaluation corresponding to that column was not performed.

[0081] Example 3 in Table 2 is described for comparison with the other examples in Table 2, and is the same example as Example 3 in Table 1.

[0082] [Evaluation and Measurement] The cosmetic compositions obtained in each Example and the comparative cosmetic compositions obtained in each Comparative Example were used as evaluation samples to carry out the following evaluations and measurements. The results are shown in Tables 1 to 5.

[0083] 1. Physical properties 1-1.Viscosity The viscosity was measured by the following method and conditions.

[0084] -Measurement method- 8 g of the evaluation sample was filled into a 10 mL glass vial, sealed, and stored for 18 hours in an environment of 25° C. After storage, the viscosity of each evaluation sample was measured using a vibration type viscometer. -Measurement conditions- Vibration viscometer: Sekonic Corporation's vibration viscometer "VM-10A"

[0085] 1-2. Thickness The presence or absence of viscosity was evaluated using the following measurement method and judging criteria.

[0086] -Measurement method- A 10 mL glass vial was filled with 8 g of the cosmetic composition to prepare a control sample, and a 10 mL glass vial was filled with 8 g of water to prepare a reference sample. Each glass vial filled with a control sample or a reference sample was placed on the test bench, and then the glass vial was tilted slowly over a period of about 3 to 5 seconds until the angle between the side of the glass vial and the surface of the test bench became approximately 45°. The flowability and flow rate of each of the control sample and the reference sample were visually observed when the glass vial was tilted, and the presence or absence of viscosity of the control sample was judged based on the following criteria.

[0087] -Judgment criteria- Viscous: The material has fluidity and the flow rate is slower than that of the reference sample. No viscosity: No fluidity, or fluidity but the flow rate is equivalent to that of the reference sample.

[0088] The cosmetic compositions of Comparative Examples 1 and 2, which were judged to have "no viscosity," were not subjected to evaluation of the feeling upon use.

[0089] 2.Usability evaluation The evaluation samples were evaluated for feel upon use, specifically, moisturizing feeling, quickness of skin absorption, stickiness, and compatibility between moisturizing feeling and quickness of skin absorption, as follows.

[0090] 2-1. Moisture sensation Immediately after preparation, each cosmetic composition was used by three expert evaluators in the following manner, and the moisturizing sensation was evaluated. The rank selected by each expert evaluator most frequently was regarded as the moisturizing sensation evaluation result, and in the case of the same number of selections, the better rank was regarded as the moisturizing sensation evaluation result. Specifically, the skilled evaluator took 100 μL of the cosmetic composition on his / her finger, spread it on the inside of the forearm of the opposite arm, and evaluated the moisturizing feeling at that time using the following ranks. From the viewpoint of product quality, A, B, and C were judged as acceptable ranks, and D was judged as an unacceptable rank. ~Rank~ A: I feel it is very moisturizing. B: It feels moisturizing. C: Feels slightly moisturized. D: I don't feel any moisture.

[0091] 2-2. Quick absorption by skin Immediately after preparation, each cosmetic composition was used by three expert evaluators in the following manner, and the quickness with which it blended into the skin was evaluated. The rank selected by each expert evaluator most frequently was regarded as the evaluation result for quickness with which it blended into the skin, and in the case where the number of selections was the same, the better rank was regarded as the evaluation result for quickness with which it blended into the skin. Specifically, the expert evaluator took 100 μL of the cosmetic composition on his / her finger, spread it on the inside of the forearm of the opposite arm, and evaluated the quickness with which the cosmetic composition blended with the skin using the following ranks. A indicates the best quickness with which the cosmetic composition blended with the skin. From the viewpoint of product quality, A, B, and C were judged as acceptable ranks, and D was judged as unacceptable rank. ~Rank~ A: I feel it blends into my skin very quickly. B: I feel like it blends into my skin quickly. C: I feel like it blends into the skin a little quicker. D: I don't feel like it blends into my skin quickly.

[0092] 2-3. Stickiness Immediately after preparation, each cosmetic composition was used by three expert evaluators in the following manner, and the sticky feeling was evaluated. The rank selected by each expert evaluator most frequently was regarded as the evaluation result for the sticky feeling, and in the case of the same number of selections, the better rank was regarded as the evaluation result for the sticky feeling. Specifically, the expert evaluator took 100 μL of the cosmetic on his / her finger, spread it on the inside of the forearm of the opposite arm, and evaluated the sticky feeling at that time using the following ranks. A indicates the rank that is most excellent in suppressing the sticky feeling. From the viewpoint of product quality, A, B, and C were judged as acceptable ranks, and D was judged as unacceptable rank. ~Rank~ A: It doesn't feel sticky. B: Feels slightly sticky. C: It feels sticky. D: It feels very sticky.

[0093] 2-4. Achieving both a moisturizing feel and quick absorption The compatibility of moisturizing feeling and quickness of absorption was evaluated using the following ranking based on the evaluation ranking obtained in the above-mentioned "2-1. Moisturizing feeling" and "2-2. Quickness of absorption on the skin". From the viewpoint of product quality, A, B, and C were judged as acceptable rankings, and D was judged as unacceptable ranking. ~Rank~ A: The combination of the evaluation ranks for moisturizing feeling and how quickly it absorbs into the skin is "A·A". B: The combination of the evaluation ranks for moisturizing feeling and quick absorption into the skin is "A B". C: The combination of the evaluation ranks for moisturizing feeling and quickness of skin absorption is "A·C", "B·B" or "B·C". D: The combination of the evaluation ranks for moisturizing feeling and quickness of skin absorption is "A·D", "B·D", "C·D", "D·D" or "C·C".

[0094] [Table 1]

[0095] [Table 2]

[0096] [Table 3]

[0097] [Table 4]

[0098] [Table 5]

[0099] The results shown in Tables 1 to 5 reveal that the cosmetic compositions of the Examples are thicker than the cosmetic compositions of the Comparative Examples, contain substantially no ethanol, and provide a moisturizing feeling and quick absorption by the skin when applied to the skin.

[0100] Example 23 The cosmetic composition (lotion) shown in the following formulation example was produced by a conventional method. The viscosity of the obtained lotion (25°C) was 61 mPa·s. The cosmetic composition of Example 23 was confirmed to be substantially free of ethanol, and similar to the cosmetic compositions of Examples 1 to 22, it was confirmed to be a cosmetic composition that provides a moist feeling and quick skin absorption when applied to the skin.

[0101] <Formulation example> (Total amount 100% by mass) Diglycerin 15.0% by mass 1,3-butylene glycol 5.0% by mass Dipotassium glycyrrhizinate 0.05% by mass ·Agar 3 0.65% by mass Phenoxyethanol 0.5% by weight Methylparaben 0.2% by weight ·Water remainder

[0102] Details of each component shown in Tables 1 to 5 are as follows.

[0103] <(A) Agar> Agar 1 [Product name: Ina Agar CS-310, Ina Food Industry Co., Ltd.] Agar 2 [Product name: Ina Agar CS-320, Ina Food Industry Co., Ltd.] Agar 3 [Product name: Ina Agar CS-377, Ina Food Industry Co., Ltd.] <(B) Diglycerin> Diglycerin (Product name: Diglycerin S, Sakamoto Pharmaceutical Co., Ltd.) <(C)Water> ·Purified water <(D) Anti-inflammatory ingredient> Allantoin (product name: RonaCare® Allantoin, Merck) Tranexamic acid (product name: Tranexamic acid, Maruzen Pharmaceutical Co., Ltd.) Dipotassium glycyrrhizinate (External glycyrrhizinate dipotassium, Maruzen Pharmaceutical Co., Ltd.)

[0104] <Ingredients other than those listed above> Carboxyvinyl polymer [Product name: HV801EG, Sumitomo Seika Chemicals Co., Ltd.] (Acrylates / C10-30 alkyl acrylate) crosspolymer (product name: Ultrez21, Lubrizol Corporation) Xanthan gum [Product name: KETROL CG-SFT, CP Kelco Inc.] Sodium acrylate grafted starch [Product name: Saranjul ST100MC, Sanyo Chemical Industries, Ltd.] Ammonium acryloyldimethyltaurate / VP copolymer (product name: Aristflex AVC, Clariant) Cellulose nanofiber [LeoCrysta, Daiichi Kogyo Seiyaku Co., Ltd.] Glycerin (Concentrated glycerin for cosmetics, Kao) 1,3-Propanediol (Product name: Zemea Select Propanediol, Primient Covation LLC) Dipropylene glycol (Product name: DPG, Koyo Fine Chemical Co., Ltd.) 1,3-Butylene glycol (1,3-butylene glycol, Daicel Corporation) Phenoxyethanol (Product name: Phenoxyethanol, Fujifilm Wako Pure Chemical Industries, Ltd.) Methylparaben (Product name: Mekxin-M, Ueno Pharmaceutical Co., Ltd.)

Claims

1. Agar and Diglycerin, Water, Including, The content of ethanol is 1% by mass or less relative to the total mass of the cosmetic composition; A cosmetic composition having a viscosity of 10 mPa·s to 400 mPa·s at 25°C.

2. 2. The cosmetic composition according to claim 1, wherein the content of agar is 0.1% by mass to 1.5% by mass, based on the total mass of the cosmetic composition.

3. The cosmetic composition according to claim 1 or 2, wherein the content of diglycerin is 3.0% by mass to 40% by mass, based on the total mass of the cosmetic composition.

4. 3. The cosmetic composition according to claim 1, wherein the content of diglycerin is 3.0% by mass to 30% by mass relative to the total mass of the cosmetic composition, and the content ratio of diglycerin to agar is 5 to 400 by mass.

5. The cosmetic composition according to claim 1 or 2, further comprising an anti-inflammatory component, the anti-inflammatory component comprising at least one selected from the group consisting of allantoin, dipotassium glycyrrhizinate, and tranexamic acid.

6. 6. The cosmetic composition according to claim 5, wherein the content ratio of the anti-inflammatory component to the agar is 0.03 to 20 by mass.

7. The cosmetic composition according to claim 1 or 2, which is a lotion.

Images