Cosmetic composition

Abstract

The present invention provides a cosmetic composition which has a viscous feeling, does not substantially contain ethanol, and enables the feeling of a moist feeling and a rapid feeling of skin affinity when applied to the skin. A cosmetic composition containing agar, diglycerol, and water, the content of ethanol being 1% by mass or less relative to the total mass of the cosmetic composition, and the viscosity at 25 DEG C being 10-400 mPa.s.

Description

Technical Field

[0001] The present invention relates to a cosmetic composition. Background Art

[0002] In recent years, consumers' preferences for cosmetics that are applied directly to the skin (such as lotions) have become diversified. Various viewpoints such as the effect of active ingredients, characteristic feeling of use (slippery feeling during use, skin-friendly feeling, etc.), product appearance, product operability, etc. sometimes become the motivation for consumers to buy products, so product development has also become diversified.

[0003] For example, Patent Document 1 describes a composition suitable for external use on the skin such as cosmetics, which includes "a composition comprising one or more polysaccharides (A) whose 0.005 to 0.4 wt. % aqueous solution at 20° C. exhibits non-Bingham plastic fluid behavior, and one or more polysaccharides (B) whose 0.005 to 0.4 wt. % aqueous solution at 20° C. exhibits Newtonian fluid behavior or pseudoplastic fluid behavior, and whose viscosity measured by a B-type viscometer at 20° C. is 2,500 mPa·s or less. The composition is considered to have a loose feel when used.

[0004] Patent Document 2 states: "A cosmetic comprising agar gel particles having an average particle size of 0.5 to 10 mm dispersed in an aqueous medium containing one or more selected from carboxyvinyl polymers and alkyl-modified carboxyvinyl polymers and natural colloids." This cosmetic is believed to have skin affinity that spreads evenly on the skin.

[0005] Patent Document 3 describes: "A jelly composition comprising (A) agar, (B) xanthan gum, (C) locust bean gum, and (D) water." It is believed that the jelly composition can be filled in a common cosmetic sprayer such as a spray dispenser for use.

[0006] Patent Document 1: Japanese Patent Application Publication No. 2022-85361

[0007] Patent Document 2: Japanese Patent Application Publication No. 2014-181224

[0008] Patent Document 3: Japanese Patent Application Publication No. 2013-13943

[0009] Development of cosmetic compositions with an eye toward a specific feeling in use or operability is being widely pursued.

[0010] However, it is technically difficult to realize a cosmetic composition that simultaneously achieves both "moisture feeling" and "penetration feeling (ie, quick feeling of skin affinity)" which are in principle contradictory feelings during use.

[0011] From the perspective of a cosmetic composition that allows the user to actually feel "a quick feeling of skin affinity", for example, a method is known in which a volatile solvent such as ethanol is added to the cosmetic composition to give the user a feeling of rapid penetration when the cosmetic composition is applied to the skin. However, in order to cope with users who are allergic to ethanol, a cosmetic composition with a formulation design that can minimize the amount of ethanol is desired.

[0012] In addition, there is a high demand for cosmetic compositions having a viscous feel from the viewpoint of an appearance that reminds the user of a moisturizing feeling and operability when taking out by hand after application. Summary of the invention

[0013] An object of one embodiment of the present invention is to provide a cosmetic composition having a viscous feel, containing substantially no ethanol, and providing a moist feeling and a quick feeling of skin affinity when applied to the skin.

[0014] The present invention includes the following aspects.

[0015] [1] A cosmetic composition comprising agar; diglycerol; and water, wherein the content of ethanol is 1% by mass or less based on the total mass of the cosmetic composition and the viscosity at 25° C. is 10 mPa·s to 400 mPa·s.

[0016] [2] The cosmetic composition according to [1], wherein

[0017] The content of agar is 0.1% by mass to 1.5% by mass based on the total mass of the cosmetic composition.

[0018] [3] The cosmetic composition according to [1] or [2], wherein

[0019] The content of diglycerin is 3.0% by mass to 40% by mass based on the total mass of the cosmetic composition.

[0020] [4] The cosmetic composition according to any one of [1] to [3], wherein

[0021] The content of diglycerol is 3.0% to 30% by mass based on the total mass of the cosmetic composition, and the content ratio of diglycerol to agar is 5 to 400 on a mass basis.

[0022] [5] The cosmetic composition according to any one of [1] to [4], further comprising an anti-inflammatory ingredient, wherein the anti-inflammatory ingredient comprises at least one selected from the group consisting of allantoin, dipotassium glycyrrhizinate and tranexamic acid.

[0023] [6] The cosmetic composition according to [5], wherein

[0024] The content ratio of the anti-inflammatory component to agar is 0.03 to 20 on a mass basis.

[0025] [7] The cosmetic composition according to any one of [1] to [6], which is a lotion.

[0026] Effects of the Invention

[0027] According to one embodiment of the present invention, there is provided a cosmetic composition having a viscous feel, substantially containing no ethanol, and providing a moist feeling and a quick feeling of skin affinity when applied to the skin. DETAILED DESCRIPTION

[0028] Hereinafter, an example of an embodiment of the cosmetic composition of the present invention will be described in detail. The description of the requirements described below is based on a representative embodiment of the present invention, but is not limited to this embodiment of the present invention, and can be implemented with appropriate modifications within the scope of the purpose of the present invention.

[0029] In the present invention, a numerical range expressed using "to" means a range including the numerical values ​​described before and after "to" as the lower limit and the upper limit, respectively.

[0030] In the numerical ranges recorded in stages in the present invention, the upper limit or lower limit recorded in a certain numerical range can be replaced by the upper limit or lower limit of the numerical range recorded in other stages. In addition, in the numerical ranges recorded in the present invention, the upper limit or lower limit recorded in a certain numerical range can also be replaced by the value shown in the embodiment.

[0031] In the present invention, when there are plural substances corresponding to each component in the cosmetic composition, the amount of each component in the cosmetic composition refers to the total amount of the plural substances present in the cosmetic composition unless otherwise specified.

[0032] In the present invention, a combination of two or more preferred aspects is a more preferred aspect.

[0033] In the present invention, "mass %" and "weight %" have the same meaning.

[0034] In the present invention, the term "process" includes not only an independent process but also a process that cannot be clearly distinguished from other processes as long as the intended purpose of the process can be achieved.

[0035] [Cosmetic composition]

[0036] The cosmetic composition of the present invention contains agar, diglycerin and water, the content of ethanol is 1% by mass or less based on the total mass of the cosmetic composition, and the viscosity at 25° C. is 10 mPa·s to 400 mPa·s.

[0037] The cosmetic composition according to the present invention contains agar, diglycerin and water, the content of ethanol is 1% by mass or less relative to the total mass of the cosmetic composition, the viscosity at 25° C. is 10 mPa·s to 400 mPa·s, and thus has a viscous feel, and contains substantially no ethanol, and when applied to the skin, a moist feeling and a quick feeling of skin affinity can be felt. On the other hand, such a composition is not envisioned in Patent Documents 1 to 3.

[0038] In the present invention, whether the cosmetic composition has a sticky feel is determined by visually observing the appearance of the cosmetic composition. Specifically, the stickiness is determined by the method described in the Examples below.

[0039] In the cosmetic composition of the present invention, 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 does not substantially contain ethanol. That is, in the present invention, substantially containing no 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.

[0040] Since the content of ethanol in the cosmetic composition of the present invention is 1% by mass or less relative to the total mass of the cosmetic composition, a prescription can be designed that contains as little ethanol as possible, and users who are allergic to ethanol can also be accommodated.

[0041] 〔(A) Agar〕

[0042] The cosmetic composition according to the present invention contains agar.

[0043] Agar can function as a thickener in the cosmetic composition of the present invention.

[0044] The cosmetic composition according to the present invention may contain only one type of agar, or may contain two or more types.

[0045] There is no particular limitation as long as the agar is one commonly used in pharmaceuticals, quasi-drugs, and cosmetics.

[0046] As agar, for example, agar having a gel strength of 10 g / cm 2 ~900g / cm 2 Agar. Preferably the gel strength is 50 g / cm 2 ~250g / cm 2 In one embodiment, the agar may have a gel strength of 80 g / cm 2 ~250g / cm 2 of agar.

[0047] Gel strength of agar (g / cm2 ) is expressed by the gel strength based on the Nichikan water formula. The gel strength based on the Nichikan water formula is the value measured by the Nichikan water formula gel strength tester used by the Japan Agar Manufacturing Fisheries Association. A 1.5 mass % agar aqueous solution is placed at 20°C for 15 hours to make a solidified gel. The gel strength per 1 cm 2 The surface of the gel can withstand the maximum load (g) for 20 seconds.

[0048] Agar can be obtained as a commercial product. When a commercial product is used as agar, the gel strength is the value in the catalog.

[0049] 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 high melting point agar (all from Ina Food Industry Co., Ltd.).

[0050] From the viewpoint of the feeling when applied to the skin (i.e., a quick feeling that combines moist feeling and skin affinity), agar is preferably UX-100 (gel strength: 80 g / cm 2 ~120g / cm 2 ), UX-200 (gel strength: 180g / cm 2 ~220g / cm 2 ), CS-120 (gel strength: 150g / cm 2 ~250g / cm 2 ), CS-320 (gel strength: 150g / cm 2 ~250g / cm 2 ) and CS-310 (gel strength: 80g / cm 2 ~120g / cm 2 ).

[0051] From the viewpoint of suppressing the color of the cosmetic composition from becoming yellow by containing agar, SV-100 (gel strength: 50 g / cm 2 ~150g / cm 2 )、USV-100(Gel strength: 50g / cm 2 ~150g / cm 2 )、TR-100(Gel strength: 50g / cm 2~150g / cm 2 )、UTR-100(Gel strength: 50g / cm 2 ~150g / cm 2 ), CS-166 (gel strength: 50g / cm 2 ~150g / cm 2 ) and CS-377 (gel strength: 50g / cm 2 ~150g / cm 2 ).

[0052] The content of agar is not particularly limited, but from the perspective of imparting a viscous feel and taking into account a quick sense of moistness and skin affinity, it is preferably 0.1% to 1.5% by mass, more preferably 0.2% to 1.0% by mass, and particularly preferably 0.3% to 0.8% by mass relative to the total mass of the cosmetic composition. In one embodiment, the content of agar may be 0.3% to 0.6% by mass. When the content of agar is within the above range, it also helps to give an appearance reminiscent of a moisturizing feeling and a viscosity that makes the workability during use good.

[0053] 〔(B) Diglycerol〕

[0054] The cosmetic composition according to the present invention contains diglycerin. Diglycerin functions as a moisturizer.

[0055] There are no particular restrictions on diglycerol as long as it is a compound represented by the molecular formula: 0[CH2CH(OH)CH2OH]2 and is diglycerol commonly used in pharmaceuticals, quasi-drugs and cosmetics.

[0056] Diglycerol is available as a commercial product, and examples of the commercial product include diglycerol 801 (Sakamoto Yakuhin Kogyo Co., Ltd.), diglycerol S (Sakamoto Yakuhin Kogyo Co., Ltd.), and UNIGLY G-2 (NOF CORPORATION).

[0057] The content of diglycerol is not particularly limited, but from the viewpoint of achieving both moisturizing feeling and quick feeling of skin affinity and suppressing stickiness, it is preferably 3.0% to 40% by mass, more preferably 3.0% to 30% by mass, and particularly preferably 15% to 30% by mass, relative to the total mass of the cosmetic composition. In one embodiment, the content of diglycerol may be 20% to 30% by mass.

[0058] In one embodiment of the cosmetic composition of the present invention, from the viewpoint of achieving both moist feeling and quick feeling of skin affinity and suppressing stickiness, the content of diglycerol is 3.0% to 30% by mass relative to the total mass of the cosmetic composition, and the content ratio of diglycerol to agar ((B) / (A)) is preferably 2.0 to 4000 on a mass basis. The content ratio of diglycerol to agar ((B) / (A)) is more preferably 5 to 400 on a mass basis, and particularly preferably 25 to 150 on a mass basis. In one embodiment, the content ratio of diglycerol to agar ((B) / (A)) can be 50 to 150 on a mass basis.

[0059] <Other polyols>

[0060] The cosmetic composition according to the present invention may contain, in addition to diglycerol, other polyols other than diglycerol (hereinafter also referred to as “other polyols”). Other polyols may be components that function as moisturizers.

[0061] When a cosmetic composition contains only other polyols commonly used as moisturizers, there is a tendency that a moist feeling and a quick feeling of skin affinity cannot be achieved at the same time. In contrast, in one embodiment of the cosmetic composition involved in the present invention, agar, diglycerin and other polyols are contained, so that a moist feeling and a quick feeling of skin affinity can be achieved at the same time.

[0062] When the cosmetic composition according to the present invention contains other polyols, the cosmetic composition may contain only one type of other polyols, or may contain two or more types.

[0063] The other polyols are not particularly limited as long as they are polyols commonly used in pharmaceuticals, quasi-drugs, and cosmetics.

[0064] Examples of other polyols include glycerin, 1,3-propylene glycol, dipropylene glycol, 1,3-butylene glycol, and polyethylene glycol.

[0065] The content of other polyols can be appropriately set according to the purpose.

[0066] 〔(C) Water〕

[0067] The cosmetic composition according to the present invention contains water.

[0068] The water is not particularly limited as long as it can be used for cosmetics.

[0069] Specific examples of water include natural water, purified water, distilled water, ion-exchanged water, pure water, and ultrapure water (eg, Milli-Q water).

[0070] As water, for example, from the viewpoint of having few impurities, purified water, distilled water, ion-exchanged water, pure water or ultrapure water is preferable.

[0071] The content of water in the cosmetic composition according to the present invention 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.

[0072] [(D) Anti-inflammatory ingredients]

[0073] The cosmetic composition of the present invention may further contain an anti-inflammatory component. The cosmetic composition of the present invention may contain only one anti-inflammatory component or may contain two or more anti-inflammatory components.

[0074] When a cosmetic composition containing an anti-inflammatory ingredient is applied to the skin, the user may feel a sticky feeling. It is technically difficult to contain an anti-inflammatory ingredient and suppress the sticky feeling in a conventional cosmetic composition. On the other hand, even when the cosmetic composition according to the present invention further contains an anti-inflammatory ingredient, when applied to the skin, a moist feeling and a quick feeling of skin affinity can be felt, and the sticky feeling can be suppressed.

[0075] As the anti-inflammatory component, there is no particular limitation as long as it is an anti-inflammatory component commonly used in pharmaceuticals, quasi-pharmaceuticals and cosmetics. As the anti-inflammatory component, for example, allantoin, dipotassium glycyrrhizinate, tranexamic acid, stearyl glycyrrhetinate and nicotinamide can be cited, preferably at least one selected from the group consisting of allantoin, dipotassium glycyrrhizinate and tranexamic acid.

[0076] Allantoin may be a commercial product. Examples of commercial products of allantoin include RonaCare (registered trademark) Allantoin (Merck), Allantoin (Permachem Asia Ltd.), and Allantoin (Kawaken Fine Chemicals Co., Ltd.).

[0077] As dipotassium glycyrrhizinate, a commercially available product can be used. As an example of a commercially available product of dipotassium glycyrrhizinate, JSQI dipotassium glycyrrhizinate (MARUZEN PHARMACEUTICALS CO., LTD.) can be mentioned.

[0078] As tranexamic acid, a commercially available product can be used. Examples of commercially available products of tranexamic acid include tranexamic acid (MARUZEN PHARMACEUTICALS CO., LTD.) and tranexamic acid (Nippon Fine Chemical Co., Ltd.).

[0079] The total content of the anti-inflammatory ingredients in the cosmetic composition according to the present invention is preferably 0.05% by mass to 5.0% by mass based on the total mass of the cosmetic composition.

[0080] When the cosmetic composition according to the present invention contains allantoin as an anti-inflammatory ingredient, the content of allantoin is not particularly limited, but is preferably 0.05% by mass to 0.2% by mass based on the total mass of the cosmetic composition.

[0081] When the cosmetic composition according to the present invention contains dipotassium glycyrrhizinate as an anti-inflammatory ingredient, the content of dipotassium glycyrrhizinate is not particularly limited, but is preferably 0.05% by mass to 0.5% by mass based on the total mass of the cosmetic composition.

[0082] When the cosmetic composition according to the present invention 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 based on the total mass of the cosmetic composition.

[0083] When the cosmetic composition of the present invention contains an anti-inflammatory component, the content ratio of the anti-inflammatory component to agar ((D) / (A)) is preferably 0.03 to 20, more preferably 0.05 to 4.0, based on mass, from the viewpoint of suppressing stickiness. In one embodiment, the content ratio of the anti-inflammatory component to agar ((D) / (A)) can be 0.10 to 4.0, based on mass.

[0084] 〔Other added ingredients〕

[0085] The cosmetic composition of the present invention may contain additives commonly used in cosmetics, quasi-drugs, and pharmaceuticals (hereinafter, also simply referred to as “additives”) as necessary.

[0086] As the additives, for example, functional ingredients that show effective beauty effects (e.g., moisturizing effects, skin conditioning effects, etc.) when used in cosmetic compositions can be cited. In addition, as the additives, 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 scavengers, antimicrobial agents, minerals, etc. can be cited.

[0087] When the cosmetic composition according to the present invention contains an additive component, it may contain only one type of additive component or may contain two or more types.

[0088] When the cosmetic composition according to the present invention contains an additive component, the content of the additive component is not particularly limited and can be appropriately set depending on the purpose.

[0089] 〔Ethanol content〕

[0090] In the cosmetic composition of the present invention, the content of ethanol is 1% by mass or less, preferably 0% to 0.5% by mass, and more preferably 0% by mass, relative to the total mass of the cosmetic composition.

[0091] [Properties of cosmetic composition]

[0092] <Viscosity>

[0093] The viscosity of the cosmetic composition of the present invention at 25° C. is 10 to 400 mPa·s. From the viewpoint of an appearance that gives a sense of moisturizing when the cosmetic composition is visually recognized and operability during use, the viscosity of the cosmetic composition at 25° C. is preferably 20 to 200 mPa·s, more preferably 20 to 100 mPa·s.

[0094] In the present invention, the viscosity of the cosmetic composition is a value measured using a vibration viscometer in an environment of 25°C.

[0095] As the vibration viscometer, a vibration viscometer manufactured by SEKONIC CORPORATION (device type: VM-10A) can be used.

[0096] [Use of cosmetic composition]

[0097] The cosmetic composition according to the present invention can be used suitably as a cosmetic or a quasi-drug.

[0098] The cosmetic composition according to the present invention can be preferably used for skin care, body care, scalp care, and the like.

[0099] The cosmetic composition according to the present invention is particularly preferably a lotion. That is, the cosmetic composition according to the present invention is preferably a lotion.

[0100] [Method for producing cosmetic composition]

[0101] The method for producing the cosmetic composition according to the present invention is not particularly limited.

[0102] The cosmetic composition according to the present invention can be obtained by using agar, water, and diglycerin, and, if necessary, other ingredients such as an anti-inflammatory ingredient, according to a known method for producing a cosmetic composition.

[0103] One preferred method for producing the cosmetic of the present invention is to stir and mix agar, water, diglycerin, and other components (e.g., other polyols) as needed, for example, at 80° C. (hereinafter referred to as “mixing step” as appropriate) to obtain a mixture, and then add other components such as an anti-inflammatory component as needed to the mixture.

[0104] Hereinafter, an example of a preferred method for producing the cosmetic composition according to the present invention will be described, but description of matters common to the cosmetic compositions already described, such as matters concerning the components of the cosmetic composition and their amounts, will be omitted.

[0105] 〔Mixing process〕

[0106] In the mixing step, agar, water and diglycerol are added to a predetermined 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 polyols used as needed can also be blended and stirred and mixed.

[0107] In the mixing step, for example, agar, water, and diglycerol may be mixed at once, or agar and water, and diglycerol and water may be stirred separately to prepare a mixed solution, and then the two mixed solutions may be mixed.

[0108] The mixing step is not limited to the above method. In the mixing step, the anti-inflammatory component may be added together with agar, diglycerol and water and stirred and mixed.

[0109] The mixing device is not particularly limited, and any commercially available mixing device can be used.

[0110] As the mixing device, there can be mentioned a stirrer, a paddle mixer, an impeller mixer, a homomixer, a dispersing mixer, a super mixer, a high pressure homogenizer, an ultrasonic homogenizer, etc. Among these, as the mixing device, at least one selected from the group consisting of a homomixer and a dispersing mixer is preferred.

[0111] In the mixing step, the temperature when agar, water, and diglycerol are mixed is preferably set to 70° C. to 90° C. Moreover, when polyols or the like are used as other components, in this step, agar, diglycerol, water, and polyols or the like are preferably mixed at 70° C. to 90° C. Thus, the temperature when other components are mixed is not particularly limited and can be appropriately set according to the types of components to be mixed.

[0112] The stirring conditions when mixing the components are not particularly limited as long as the components can be fully mixed, and can be appropriately set according to the mixing device. For example, when a homomixer is used as the mixing device, the components can usually be stirred at 500 rpm (revolutions per minute; hereinafter, the same.) to 8000 rpm for 5 to 60 minutes.

[0113] The method for producing the cosmetic composition according to the present invention may include steps other than the mixing step (so-called other steps) as necessary.

[0114] 〔Other processes〕

[0115] Examples of other steps include a defoaming step, a heat sterilization step, a cooling step, and a taking-out step. For the defoaming step, the heat sterilization step, the cooling step, and the taking-out step, any method known in the art may be applied.

[0116] Example

[0117] Hereinafter, the cosmetic composition of the present invention will be described in more detail using examples. However, the cosmetic composition of the present invention is not limited to the following examples unless it exceeds the scope of the present invention.

[0118] [Preparation of cosmetic composition]

[0119] [Examples 1 to 6, Comparative Examples 1 to 2]

[0120] Agar described in the composition column of the following Table 1 and 50 times the amount of water relative to agar were mixed, and after heating to 80°C in a water bath, a homomixer (equipment type name: HOMO MIXER MARK II2.5 type, PRIMIX Corporation) was used to stir at 5000 rpm for 15 minutes. Next, each component recorded in the composition column of Table 1 except agar and the remaining water were mixed in the mixture of agar and water, and after further stirring at 3000 rpm for 10 minutes, it was cooled to 30°C. After further adding water to the cooled mixture in a manner that the total amount becomes 100% by mass, the above-mentioned homomixer was used to stir at 3000 rpm for 3 minutes. Next, the stirred mixture was vacuum degassed to obtain the cosmetic compositions of Examples 1 to 6 and Comparative Examples 1 to 2.

[0121] [Examples 7 to 12, 21]

[0122] In Example 3, the same operation as in Example 3 was carried out except that the composition of the cosmetic composition was changed to the composition shown in Table 2 and Table 3 below, thereby obtaining each cosmetic composition of Examples 7 to 12 and 21.

[0123] [Examples 13 to 20]

[0124] Agar described in the composition column of Table 3 below and water in an amount 50 times that of agar were mixed, heated to 80° C. in a water bath, and stirred at 5000 rpm for 15 minutes using a homomixer (equipment type name: HOMO MIXER MARK II 2.5, PRIMIX Corporation). In addition, component (D) described in the composition column of Table 3 and water in an amount 10 times that of component (D) were mixed and stirred at 70° C. for 5 minutes to dissolve component (D) and prepare a component (D) solution.

[0125] Next, diglycerin and the remaining water listed in the composition column of Table 3 were mixed in the mixture of agar and water, and the mixture was further stirred at 3000 rpm for 10 minutes and then cooled to 30° C. The solution of component (D) prepared above was added to the cooled mixture, and water was further added so that the total amount became 100% by mass, and then stirred at 3000 rpm for 3 minutes using the above homomixer. Next, the stirred mixture was vacuum degassed to obtain the cosmetic compositions of Examples 13 to 20.

[0126] [Example 22]

[0127] Agar described in the composition column of Table 3 below and water in an amount 50 times the amount of agar were mixed, heated to 80°C in a water bath, and stirred at 5000 rpm for 15 minutes using a homomixer (equipment type name: HOMO MIXER MARK II 2.5 type, PRIMIX Corporation). Next, diglycerin described in the composition column of Table 3 and the remaining water were mixed in the mixture of agar and water, and further stirred at 3000 rpm for 10 minutes, cooled to 30°C, ethanol was added, and water was further added so that the total amount became 100% by mass, and then stirred at 3000 rpm for 3 minutes using the above homomixer. Next, the stirred mixture was vacuum degassed to obtain the cosmetic composition of Example 22.

[0128] [Comparative Examples 3 to 8]

[0129] After mixing 50 times the amount of water recorded in the composition column of the following Table 4 relative to the polysaccharide or synthetic polymer, and heating to 80°C in a water bath, a homogenizer (equipment type name: HOMO MIXER MARK II 2.5 type, PRIMIX Corporation) was used to stir at 5000 rpm for 15 minutes. Next, the components recorded in the composition column of Table 4 and the remaining water were mixed in the mixture of polysaccharides or synthetic polymers and water, and further stirred at 3000 rpm for 10 minutes, and then cooled to 30°C. After further adding water to the cooled mixture in a manner that the total amount becomes 100% by mass, the above-mentioned homogenizer was used to stir at 3000 rpm for 3 minutes. Next, the stirred mixture was vacuum degassed to obtain the cosmetic compositions of Comparative Examples 3 to 8.

[0130] [Comparative Examples 9 to 12]

[0131] In Example 1, the same operation as in Example 1 was carried out except that the composition of the cosmetic composition was changed to the composition shown in Table 5 below, thereby obtaining cosmetic compositions of Comparative Examples 9 to 12.

[0132] In addition, the amount of each component described in the composition column in Tables 1 to 5 is "mass %", and the total amount of each composition based on the amount of water is set to 100 mass %.

[0133] In Tables 1 to 5, when each component column is blank, it means that the component corresponding to the column is not contained.

[0134] In Tables 1 to 5, “-” in the columns of “content ratio of diglycerol to agar” and “content ratio of anti-inflammatory agent to agar” means that the value corresponding to the column cannot be calculated.

[0135] In Table 1, "-" in the evaluation column means that the evaluation corresponding to the column was not performed.

[0136] Example 3 described in Table 2 is described for comparison with other examples described in Table 2, and is the same example as Example 3 described in Table 1.

[0137] [Evaluation and measurement]

[0138] The cosmetic compositions obtained in each example and the comparative cosmetic compositions obtained in each comparative example were used as evaluation samples, and the following evaluations and measurements were performed. The results are collectively described in Tables 1 to 5.

[0139] 1.Physical properties

[0140] 1-1. Viscosity

[0141] The viscosity is measured by the following measurement method and measurement conditions.

[0142] -Measurement method-

[0143] 8 g of the evaluation sample was filled in a 10 mL glass vial, which was sealed and stored for 18 hours in an environment of 25° C. The viscosity of each evaluation sample after storage was measured using a vibration viscometer.

[0144] -Measurement conditions-

[0145] Vibration viscometer: VM-10A, manufactured by SEKONIC CORPORATION

[0146] 1-2. Whether there is a sticky feeling

[0147] The presence or absence of stickiness was evaluated by the following measuring method and criteria.

[0148] -Measurement method-

[0149] A 10 mL glass vial was filled with 8 g of the cosmetic composition as a control sample, and a 10 mL glass vial was filled with 8 g of water as a reference sample.

[0150] After each glass vial filled with a control sample or a reference sample is left still on a test table, the glass vial is tilted slowly for about 3 to 5 seconds until the angle between the side of the glass vial and the surface of the test table becomes about 45°.

[0151] The fluidity and flow rate of each of the control sample and the reference sample when the glass vial was tilted were visually observed, and the presence or absence of stickiness of the control sample was judged based on the following criteria.

[0152] (Judgment Criteria)

[0153] Viscous feeling: It has fluidity, and the flow rate is slower than that of the reference sample.

[0154] No stickiness: No fluidity, or fluidity but the flow rate is equal to that of the reference sample.

[0155] The cosmetic compositions of Comparative Examples 1 and 2 judged to have “no sticky feeling” were not evaluated for feeling during use.

[0156] 2. User experience evaluation

[0157] Regarding the feeling of use of the evaluation samples, specifically, the moist feeling, the quick feeling of skin affinity, the sticky feeling, and the balance between the moist feeling and the quick feeling of skin affinity were evaluated as follows.

[0158] 2-1. Moist feeling

[0159] Three skilled evaluators used each cosmetic composition immediately after preparation in the following manner to evaluate the moist feeling. Among the levels selected by each skilled evaluator, the level with the largest number of selections was used as the moist feeling evaluation result, and when the number of selections was the same, the higher level was used as the moist feeling evaluation result.

[0160] Specifically, an expert evaluator took 100 μL of the cosmetic composition with a finger, spread it on the inner forearm of the opposite arm, and evaluated the moist feeling at that time using the following scale.

[0161] A represents the most excellent level of moist feeling. From the viewpoint of commercial quality, A, B, and C are judged as acceptable levels, and D is judged as unacceptable level.

[0162] ~Level~

[0163] A: I feel the moisture strongly.

[0164] B: Feeling moist.

[0165] C: Slightly moist.

[0166] D: No moisture was felt.

[0167] 2-2. Quick feeling of skin affinity

[0168] Three skilled evaluators used each cosmetic composition immediately after preparation in the following manner to evaluate the quick feeling of skin affinity. Among the levels selected by each skilled evaluator, the level with the largest number of selections was used as the evaluation result of the quick feeling of skin affinity, and when the number of selections was the same, the higher level was used as the evaluation result of the quick feeling of skin affinity.

[0169] Specifically, the evaluator takes 100 μL of the cosmetic composition with his / her finger, spreads it on the inner forearm of the opposite arm, and evaluates the quick feeling of skin affinity at this time using the following grades. A represents the grade with the best quick feeling of skin affinity. From the perspective of commercial quality, A, B and C are judged as acceptable grades, and D is judged as unacceptable grade.

[0170] ~Level~

[0171] A: I feel that it has quick skin affinity.

[0172] B: I feel the skin affinity quickly.

[0173] C: Feels skin affinity slightly faster.

[0174] D: No skin affinity was felt.

[0175] 2-3. Sticky feeling

[0176] Three skilled evaluators used each cosmetic composition immediately after preparation and evaluated the stickiness in the following manner. Among the levels selected by each skilled evaluator, the level with the largest number of selections was used as the evaluation result of the stickiness, and when the number of selections was the same, the higher level was used as the evaluation result of the stickiness.

[0177] Specifically, an expert evaluator takes 100 μL of the cosmetic with his / her finger, spreads it on the inner forearm of the opposite arm, and evaluates the stickiness at this time using the following ratings. A represents the most excellent rating for suppressing the stickiness. From the perspective of commercial quality, A, B, and C are rated as acceptable, and D is rated as unacceptable.

[0178] ~Level~

[0179] A: No stickiness was felt.

[0180] B: Slightly sticky feeling.

[0181] C: Feels sticky.

[0182] D: It feels very sticky.

[0183] 2-4. Balance between moist feeling and quick feeling of affinity

[0184] The evaluation of both moist feeling and quick feeling of affinity was evaluated using the following ratings based on the ratings obtained in the evaluations of "2-1. Moist feeling" and "2-2. Quick feeling of affinity for skin" above. From the perspective of commercial quality, A, B, and C were rated as acceptable, and D was rated as unacceptable.

[0185] ~Level~

[0186] A: The combination of the evaluation levels of moist feeling and quick feeling of skin affinity was "A·A".

[0187] B: The combination of the evaluation levels of moist feeling and quick feeling of skin affinity was "A·B".

[0188] C: The combination of the evaluation levels of moist feeling and quick feeling of skin affinity is "AC", "BB" or "BC".

[0189] D: The combination of the evaluation levels of moist feeling and quick feeling of skin affinity is "A·D", "B·D", "C·D", "D·D" or "C·C".

[0190]

[0191]

[0192]

[0193]

[0194]

[0195] As is clear from the results shown in Tables 1 to 5, the cosmetic compositions of Examples are more viscous than the cosmetic compositions of Comparative Examples, contain substantially no ethanol, and provide a moisturizing feel and quick skin affinity when applied to the skin.

[0196] [Example 23]

[0197] The cosmetic compositions (lotions) shown in the following formulation examples were produced by conventional methods.

[0198] The viscosity (25° C.) of the obtained lotion was 61 mPa·s.

[0199] The cosmetic composition of Example 23 does not substantially contain ethanol, and similarly to the cosmetic compositions of Examples 1 to 22, it was confirmed that the cosmetic composition provides a moist feeling and quick skin affinity when applied to the skin.

[0200]

[0201] The details of each component described in Tables 1 to 5 are as follows.

[0202] <(A) Agar>

[0203] Agar 1〔Product name: INA AGAR CS-310, Ina Food Industry Co., Ltd.〕

[0204] Agar 2〔Product name: INA AGAR CS-320, Ina Food Industry Co., Ltd.〕

[0205] Agar 3〔Product name: INA AGAR CS-377, Ina Food Industry Co., Ltd.〕

[0206] <(B) Diglycerol>

[0207] ·Diglycerol〔Product name: Diglycerol S, Sakamoto Yakuhin Kogyo Co., Ltd.〕

[0208] <(C) Water>

[0209] Purified water

[0210] <(D) Anti-inflammatory ingredients>

[0211] Allantoin [Product name: RonaCare (registered trademark) Allantoin, Merck]

[0212] · Tranexamic acid [Product name: Tranexamic acid, MARUZEN PHARMACEUTICALS CO., LTD.]

[0213] · Dipotassium glycyrrhizinate〔JSQI Dipotassium glycyrrhizinate, MARUZEN PHARMACEUTICALS CO.,LTD.〕

[0214] <Ingredients other than the above>

[0215] ·Carboxyvinyl polymer〔Product name: HV801EG, Sumitomo Seika Chemicals Company, Limited〕

[0216] ·(Acrylates / Alkyl Acrylate (C10-30)) Crosspolymer〔Product name: Ultrez 21, Lubrizol Corporation〕

[0217] Xanthan gum〔Product name: KETROL CG-SFT, CP Kelco Inc.〕

[0218] Sodium acrylate grafted starch [Product name: SALANJUL ST100MC, Sanyo Chemical Industries, Ltd.]

[0219] ·(Ammonium acryloyldimethyltaurate / VP) copolymer〔Product name: Aristflex AVC, Clariant〕

[0220] ·Cellulose nanofiber〔RHEOCRYSTA, DKS Co. Ltd.〕

[0221] · Glycerin (Concentrated glycerin for cosmetics, Kao Corporationv

[0222] 1,3-Propanediol [Product name: Zemea Select Propylene Glycol, Primient Covation LLC]

[0223] ·Dipropylene glycol〔Product name: DPG, KOYO FINE CHEMICAL CORPORATION〕

[0224] 1,3-Butanediol〔1,3-Butanediol, Daicel Corporation)

[0225] ・Phenoxyethanol〔Trade name: Phenoxyethanol, FUJIFILM Wako Pure Chemical Corporation〕

[0226] ·Methylparaben〔Trade name: MEKKINS-M, UENO FINE CHEMICALS IND USTRY, LTD.〕

Claims

1. A cosmetic composition comprising: Agar; Diglycerol; and water, The content of ethanol is 1% by mass or less relative to the total mass of the cosmetic composition. The viscosity at 25°C is 10 mPa·s to 400 mPa·s.

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. The cosmetic composition according to claim 1 or 2, wherein The content of diglycerol is 3.0% to 30% by mass based on the total mass of the cosmetic composition, and the content ratio of diglycerol to agar is 5 to 400 on a mass basis.

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

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

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

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