JP7732489B2 - Skin cosmetics - Google Patents

Description

The present invention relates to a skin cosmetic used to moisturize the skin of the face, body, etc.

The water commonly used in skin cosmetics is ion-exchanged water, which is made by removing impurities such as metal ions using ion exchange resins, primarily from tap water collected from rivers and purified. Components removed by ion exchange resins may include natural moisturizing factors (NMFs) such as calcium and magnesium ions. NMFs play an important role in maintaining healthy skin, and include not only mineral salts such as calcium and magnesium ions, but also amino acids, pyrrolidone carboxylic acid (and its salts), urea, lactic acid, and other organic acids (and their salts). It is known that a decrease in the amount of NMF in the stratum corneum reduces the skin's moisturizing function, making it more susceptible to dry skin.

The effectiveness of mineral salts such as calcium ions and magnesium ions in moisturizing the skin is widely recognized, as seen in cosmetics that use sea mud rich in mineral salts (Patent Document 1). Clay packs containing clay minerals are known as formulations that effectively utilize mineral salts. However, when mineral salts (especially divalent or higher mineral salts) are added to aqueous skin cosmetics, they can cause substances that are dissolved in water to bond together, resulting in water-insoluble substances. Therefore, when natural water rich in mineral salts is used in skin cosmetics, there is a risk that the mineral salts contained in the natural water will cause insoluble matter to form. Insoluble matter that forms in skin cosmetics not only deteriorates the appearance due to precipitation, but can also cause roughness upon application, impairing the smooth feel of application.

A smooth application sensation means a silky feel when applied to the skin, without any roughness or squeaking. To achieve a smooth application sensation, it is important to reduce the roughness and squeaking that are inherent in cosmetics, as well as to smooth the skin's texture. Rough and uneven skin makes it difficult to feel a smooth application sensation, whereas skin with a fine texture and smooth surface is more likely to feel a smooth application sensation. Skin texture can become rough when roughness occurs due to stress or external stimuli, so preventing roughness is important in order to smooth the skin's texture, and anti-inflammatory ingredients are known to prevent roughness.

Allantoin, dipotassium glycyrrhizinate, tranexamic acid, and niacinamide are widely used in cosmetics as anti-inflammatory ingredients. These ingredients are water-soluble solids, and as a result of factors such as low or high storage temperatures and evaporation of water, they precipitate in cosmetics. Preventing this precipitation presents a challenge. Various solutions to this problem have been known for compositions containing ion-exchanged water, as described in Patent Documents 2 to 5. Meanwhile, no known methods have been found to prevent the precipitation of allantoin, dipotassium glycyrrhizinate, tranexamic acid, or niacinamide in cosmetics containing natural water. In cosmetics containing natural water, the mineral salts contained in the natural water can sometimes promote the precipitation of allantoin, dipotassium glycyrrhizinate, tranexamic acid, and niacinamide. Precipitation of these ingredients can adversely affect the cosmetic's appearance and result in a lack of a smooth feel upon application.

The smooth application feel is affected not only by skin conditions such as skin texture, but also by whether or not a cosmetic product has been applied to the skin. In other words, the application feel on skin without a cosmetic product may differ from that on skin with a cosmetic product applied. In general skin care, a combination of lotion, emulsion, serum, cream, etc. is used, or all-in-one cosmetics are used to shorten skin care time and reduce the number of skin care items used. However, a single application of these cosmetics may not provide sufficient moisturizing effect. Therefore, to enhance the moisturizing effect, the cosmetics are sometimes applied again after being absorbed once. When applying multiple layers in this way, a smooth application feel is achieved on the first application, but the second application may be sticky due to the previously applied cosmetic product. Therefore, a cosmetic product with minimal difference in application feel has been desired.

Japanese Patent Application Laid-Open No. 2001-233722 JP 2016-121092 A JP 2018-52914 A Japanese Patent Application Laid-Open No. 2019-199468 Japanese Patent Application Laid-Open No. 2022-82669

In light of the current situation, no skin cosmetic product has yet been developed that contains natural water and a solid anti-inflammatory ingredient, has excellent storage stability, a smooth feel upon application, and produces little difference in feel when applied multiple times, the object of the present invention is to provide a skin cosmetic product that contains natural water and a solid anti-inflammatory ingredient, has excellent storage stability, a smooth feel upon application, and produces the same feel when applied multiple times as when it was first applied.

In order to solve the above problems, the inventors conducted extensive research and discovered that simply adding a specific alcohol and acidic mucopolysaccharides to a cosmetic product containing natural water of a specific hardness and a crystalline anti-inflammatory ingredient unexpectedly resulted in excellent storage stability, a smooth feel upon application, and virtually no change in feel upon application even when applied multiple times. After further research, they were able to complete the present invention.

The present invention relates to the following [1] and [2].
[1] A skin cosmetic comprising: 10 to 98 mass% of component (A) natural water having a hardness of 10 to 200 mg/L; 0.001 to 10 mass% of component (B) a crystalline solid having a solubility in water at 25°C of 0.5% or more and having an anti-inflammatory effect; 1 to 25 mass% of component (C) a dihydric alcohol having 3 to 6 carbon atoms; and 0.00001 to 0.05 mass% of component (D) an acidic mucopolysaccharide.
[2] The skin cosmetic composition according to the above [1], containing 0.01 to 10 mass% of component (E) an alkylene oxide derivative represented by the following formula (1):

In formula (1), Z is a residue obtained by removing all hydroxyl groups from a compound having 1 to 7 carbon atoms and 1 to 4 hydroxyl groups.
x represents an integer of 1 to 4. EO is an oxyethylene group. PO is an oxypropylene group. BO is an oxybutylene group.
a is the average number of moles of the oxyethylene groups added and is 0≦a≦100, b is the average number of moles of the oxypropylene groups added and is 0≦b≦60, and c is the average number of moles of the oxybutylene groups added and is 0≦c≦5. However, a, b, and c are not all 0 at the same time. When a and b are not 0, (a/b) is 1/5 to 7/1. EO, PO, and BO may be added randomly or in blocks, or may be added in a mixture of random and block moieties.

The present invention provides a skin cosmetic that contains natural water and a crystalline solid anti-inflammatory ingredient, has excellent storage stability, a smooth feel upon application, and maintains a consistent feel even when applied multiple times.

Hereinafter, an embodiment of the present invention will be described.
The present invention relates to a skin cosmetic containing the above-mentioned components (A), (B), (C) and (D) in specific proportions (hereinafter also referred to as the skin cosmetic of the present invention).
In the present invention, "skin cosmetics" refer to cosmetics that are applied by direct or indirect application or spraying onto the skin, and specific examples include skin care products such as lotions, emulsions, and creams, finishing (makeup) cosmetics such as foundations, fragranced cosmetics, medicated cosmetics (quasi-drugs), etc. Of these, skin care products and medicated cosmetics that keep the skin clean and healthy are preferred.
In this specification, a numerical range defined using the symbol "to" is intended to include both the upper and lower limits of the symbol "to." For example, "2 to 5" represents a range of 2 or more and 5 or less.

<Component (A): Natural water with a hardness of 10 to 200 mg/L>
The component (A) used in the present invention is natural water having a hardness of 10 mg/L to 200 mg/L calculated from the content of calcium salts and magnesium salts.
The natural water is not particularly limited as long as it has the above-mentioned specific hardness, and examples include shallow well water, deep well water, spring water, mineral water, hot spring water, underground water, mineral water, etc., as classified in "2. Labeling Method" of the Notice from the Director-General of the Food Distribution Bureau dated March 30, 1990. Any of these natural waters may be used alone, or two or more may be used in combination. Furthermore, these natural waters may be used as they are after collection, or may be subjected to filtration sterilization, heat sterilization, ozone sterilization, ultraviolet sterilization, etc. after collection.

In the present invention, hardness is the amount of calcium and magnesium converted into the amount of calcium carbonate (CaCO ₃ ), expressed in mg/L, and can be calculated using the following simplified formula (2) (atomic weights: Ca=40, Mg=24.3, molecular weight: CaCO ₃ =100).
Hardness [mg/L] = (calcium content [mg/L] × 2.5) + (magnesium content [mg/L] × 4.1) (2)

In the present invention, component (A) has a hardness calculated from the above formula (2) in the range of 10 mg/L to 200 mg/L, preferably 15 mg/L to 150 mg/L, and more preferably 20 mg/L to 100 mg/L. If the hardness is less than 10 mg/L, the smooth feel upon application may be insufficient, and there may be a large difference in the feel upon application when multiple applications are performed. If the hardness exceeds 200 mg/L, there may be a decrease in stability at low and high temperatures, and there may be an insufficient smooth feel upon application.
The difference in feel during use refers to the difference in feel in terms of smoothness and non-stickiness compared to when the product was first applied to the skin. Therefore, a small difference in feel during use means that the change in feel is small compared to when the product was first applied (almost the same), and a large difference in feel during use means that the change in feel is large compared to when the product was first applied (a decrease in smoothness and an increase in stickiness).

The content of component (A) is 10 to 98% by mass, preferably 20 to 95% by mass, and more preferably 30 to 90% by mass, based on the total amount of the skin cosmetic. If the content of component (A) is less than 10% by mass, the smooth feel upon application may be insufficient, and the difference in feel upon application may be significant when multiple applications are made. If the content of component (A) exceeds 98% by mass, the effect commensurate with the blending amount cannot be obtained.

<Component (B): A crystalline solid having a solubility in water of 0.5% or more at 25°C and having an anti-inflammatory effect>
The component (B) used in the present invention is a crystalline solid having an anti-inflammatory effect and a solubility in water of 0.5% or more at 25° C. The solubility of this crystalline solid in water is defined as 0.5% when up to 0.5 g of the crystalline solid dissolves in 100 g of water.
The upper limit is preferably 200% or less, and more preferably 100% or less.

Specific examples of crystalline solids that have a solubility of 0.5% or more in water at 25°C and have anti-inflammatory effects include allantoin (solubility 0.5%), dipotassium glycyrrhizinate (solubility 1%), tranexamic acid (solubility 16%), and niacinamide (solubility 100%).

Component (B) may be used alone or in combination with two or more. It is preferable to use two or more in combination, and when two or more are used in combination, it is preferable to use one selected from allantoin and dipotassium glycyrrhizinate in combination with one selected from tranexamic acid and niacinamide.

The content of component (B) is 0.001 to 10% by mass, preferably 0.005 to 8% by mass, more preferably 0.01 to 7% by mass, and particularly preferably 0.05 to 6% by mass, based on the total amount of the skin cosmetic. When allantoin or dipotassium glycyrrhizinate is included as component (B), from the viewpoint of stability at low and high temperatures, the content of allantoin or dipotassium glycyrrhizinate is preferably 0.005 to 0.5% by mass, more preferably 0.01 to 0.4% by mass, and particularly preferably 0.05 to 0.3% by mass, based on the total amount of the skin cosmetic.

If the content of component (B) is less than 0.001% by mass, the smooth feel upon application may be insufficient. If the content of component (B) exceeds 10% by mass, stability at low and high temperatures may decrease.

<Component (C): Dihydric Alcohol Having 3 to 6 Carbon Atoms>
Component (C) used in the present invention is a dihydric alcohol having 3 to 6 carbon atoms. Examples of dihydric alcohols having 3 to 6 carbon atoms include 1,2-propanediol, 1,3-propanediol, 1,3-butanediol, 1,4-butanediol, 1,2-pentanediol, 1,2-hexanediol, and dipropylene glycol. Of these, 1,3-propanediol, 1,3-butanediol, and 1,2-pentanediol are preferred, and 1,3-propanediol and 1,3-butanediol are more preferred.

The component (C) may be used alone or in combination of two or more.
The content of component (C) is 1 to 25% by mass, preferably 2 to 20% by mass, and more preferably 3 to 15% by mass, based on the total amount of the skin cosmetic. If the content of component (C) is less than 1% by mass, the stability at low and high temperatures may decrease, the smooth feel upon application may be insufficient, and the difference in feel upon application may be significant when multiple applications are performed. If the content of component (C) exceeds 25% by mass, the smooth feel upon application may be insufficient, and the difference in feel upon application may be significant when multiple applications are performed.

<Component (D): Acidic Mucopolysaccharide>
Component (D) used in the present invention is an acidic mucopolysaccharide, such as hyaluronic acid, chondroitin-4-sulfate, chondroitin-6-sulfate, dermatan sulfate, keratan sulfate, heparin, and the like, as well as salts and acetylated products thereof. Preferred are hyaluronic acid, chondroitin-4-sulfate, chondroitin-6-sulfate, and salts and acetylated products thereof, particularly preferred are hyaluronic acid, its salts and acetylated products, and most preferred are salts of hyaluronic acid.

Salts of acidic mucopolysaccharides include inorganic salts and organic salts. Inorganic salts include alkali metal salts such as sodium salts and potassium salts, and organic salts include quaternary ammonium salts. Preferred salts of acidic mucopolysaccharides are sodium salts and potassium salts.

Commercially available acidic mucopolysaccharides can be used. Examples of commercially available products include sodium hyaluronate products such as "Hyaluronic Acid Liquid HA-LQH1P" manufactured by Kewpie Corporation, "Hyaluronic Acid FCH-200" manufactured by Kikkoman Biochemifa Corporation, and "Extra-Hyaluronic Acid Sodium 'Maruha'" manufactured by Maruha Nichiro Foods Co., Ltd., and low-molecular-weight hyaluronic acid such as "Hyalo Oligo" manufactured by Kewpie Corporation.

The component (D) may be used alone or in combination of two or more types.
The content of component (D) is 0.00001 to 0.05% by mass, preferably 0.0001 to 0.04% by mass, and more preferably 0.0005 to 0.03% by mass, based on the total amount of the skin cosmetic. If it is less than 0.00001% by mass, the stability at low and high temperatures may decrease, and the smooth feel upon application may be insufficient. If it exceeds 0.05% by mass, the difference in feel upon application may be significant when multiple applications are performed.

<Component (E): Alkylene Oxide Derivative>
The component (E) used in the present invention is an alkylene oxide derivative represented by the following formula (1).

In formula (1), Z is a residue obtained by removing all hydroxyl groups from a compound having 1 to 7 carbon atoms and 1 to 4 hydroxyl groups.

x represents an integer between 1 and 4. EO is an oxyethylene group. PO is an oxypropylene group. BO is an oxybutylene group.

a is the average number of moles of the oxyethylene groups added, and 0≦a≦100; b is the average number of moles of the oxypropylene groups added, and 0≦b≦60; and c is the average number of moles of the oxybutylene groups added, and 0≦c≦5. However, a, b, and c cannot all be 0 at the same time. When a and b are not 0, (a/b) is 1/5 to 7/1. EO, PO, and BO may be added randomly or in blocks, or may be added in a mixture of random and block portions.

The alkylene oxide derivative represented by formula (1) can be produced by a known method. That is, ethylene oxide, propylene oxide, and butylene oxide are appropriately addition-polymerized to a hydroxy compound (Z(OH) _x ). The order of addition of each monomer during addition polymerization can be determined depending on the desired structure. Alternatively, commercially available alkylene oxide derivatives can be used.

The content of component (E) is preferably 0.01 to 10% by mass, more preferably 0.05 to 8% by mass, and even more preferably 0.1 to 5% by mass, based on the total amount of the skin cosmetic. When the content of component (E) is within this range, stability at low and high temperatures is improved, and the difference in feel when multiple applications is minimized.

From the viewpoint of improving the smooth feel upon application, the ratio (A)/(C) of the content of component (A) to component (C) is preferably 4 to 25 by mass, more preferably 5 to 20, and particularly preferably 6 to 15.

The skin cosmetic of the present invention may contain ordinary water in addition to component (A). Ordinary water is ion-exchanged water or distilled water used in ordinary skin cosmetic preparations, which contain substantially no minerals and have a hardness of 0 mg/L or less than 1 mg/L. Furthermore, when a commercially available product in the form of an aqueous solution or aqueous dispersion of an acidic mucopolysaccharide is used as component (D), the skin cosmetic of the present invention contains water derived from this product. The water contained in these products is ordinary water, such as ion-exchanged water or distilled water, which contains substantially no minerals and has a hardness of 0 mg/L or less than 1 mg/L.

The typical water content in the skin cosmetic of the present invention is preferably 0 to 60% by mass, more preferably 0 to 40% by mass, and particularly preferably 0 to 20% by mass.

<Other added ingredients>
In addition to the above-mentioned components (A) to (E), the skin cosmetic of the present invention may further contain, as additive components, general components used in cosmetics.

Examples of other additive components include moisturizers, oils, surfactants, preservatives, thickeners, pH adjusters, antioxidants, sequestering agents, fragrances, colorants, pigments, amino acids, ceramides, etc. The content of other additive components is preferably 40% by mass or less, and more preferably 30% by mass or less, of the total amount of the skin cosmetic.
From the viewpoint of a smooth feel upon application, it is preferable to contain a plant extract having anti-inflammatory effects as another ingredient. Examples of plant extracts having anti-inflammatory effects include aloe vera leaf extract, purslane extract, witch hazel leaf extract, and eucalyptus leaf extract, with purslane extract and eucalyptus leaf extract being preferred, and a combination of purslane extract and eucalyptus leaf extract being particularly preferred. The content of the plant extract having anti-inflammatory effects is preferably 0.0001 to 0.1% by mass, more preferably 0.0005 to 0.05% by mass, and even more preferably 0.001 to 0.01% by mass, based on the total amount of the skin cosmetic.

The skin cosmetic of the present invention can be produced by known methods. For example, the skin cosmetic of the present invention can be produced by mixing natural water having a hardness of 10 to 200 mg/L as component (A), a crystalline solid having a solubility in water at 25°C of 0.5% or more as component (B) and having anti-inflammatory effects, a dihydric alcohol having 3 to 6 carbon atoms as component (C), an acidic mucopolysaccharide as component (D), and an alkylene oxide derivative as component (E), and adjusting the pH appropriately to the optimum level.

The skin cosmetic of the present invention can be formulated into a liquid, gel, emulsion, cream, or other formulation, and can be used on the face, body, etc.

The present invention will be described in more detail below with reference to examples and comparative examples.
<Examples 1 to 23 and Comparative Examples 1 to 4>
The skin cosmetics shown in Table 1, Table 2 (Examples 1 to 23) and Table 3 (Comparative Examples 1 to 4) were prepared by known methods and evaluated by the following methods.
In Tables 1 to 3, the numerical values of each component indicate the content (% by mass) of each component relative to the total amount of the skin cosmetic, and (A)/(C) indicates the mass ratio of the content of component (A) to component (C).

Supplementary explanations for the symbols in Table 1 are as follows:
*1 “Natural water 1” Hardness: 150mg/L
*2 “Natural Water 2” Hardness: 50mg/L
*3 "Natural Water 3" Hardness: 25mg/L
*4 "Hyaluronic Acid Solution HA-LQH1P", manufactured by Kewpie Corporation; an aqueous solution containing 1% by mass of sodium hyaluronate and 0.8% by mass of phenoxyethanol. The content in the table is the content of sodium hyaluronate per unit of the total lotion.
* 5 "Hyalo Oligo", manufactured by Kewpie Corporation; hydrolyzed hyaluronic acid * 6 "Macbiobride MG-20P", manufactured by NOF Corporation; polyoxypropylene (20 mol) methyl glucoside * 7 "Wilbride S-753", manufactured by NOF Corporation; polyoxybutylene (3 mol) polyoxyethylene (8 mol) polyoxypropylene (5 mol) glyceryl ether * 8 "Wilbride BS-03", manufactured by NOF Corporation; polyoxyethylene (10 mol) polyoxypropylene (7 mol) butyl ether

<Evaluation method>
(1) Evaluation of Stability at Low and High Temperatures The state of the product after static storage at 0°C and 40°C for one month was checked, and the stability was evaluated as follows.
⊚: No change in appearance was observed at either 0°C or 40°C, and no separation or precipitate was observed even when returned to room temperature.
◯: A change in appearance such as turbidity was observed in either one or both of the samples at 0°C and 40°C, but no separation or precipitate was observed when the samples were returned to room temperature.
×: After storage at 0°C and 40°C, separation or precipitation was observed in either one or both of the samples when returned to room temperature.

(2) Evaluation of smooth feeling upon application Twenty women aged between 25 and 55 years old were used as panelists, and 1 g of the skin cosmetic was placed in the palm of their hand and applied to their face, and the smoothness was evaluated according to the following criteria.
2 points: If it feels very smooth.
1 point: If it feels smooth.
0 points: If it feels not smooth.

(3) Evaluation of the feel when applied multiple times Twenty women aged 25 to 55 were used as panelists, and they took 1 g of the skin cosmetic in their palm and applied it to their face. Immediately after that, they took another 1 g of the skin cosmetic in their palm and applied it to their face. The difference in feel between the first application and the second application was evaluated according to the following criteria.
2 points: When there is almost no difference in smoothness or non-stickiness.
1 point: If you feel that there is not much difference in the smooth feel or lack of stickiness.
0 points: If you feel there is a difference in the smoothness and non-stickiness.

The total scores of each panelist in the evaluations (2) to (3) above were judged according to the following criteria, and the results are shown in Table 1.
The results are shown in Table 3. "◎" and "◯" were judged to be acceptable.
◎: Total score is 35 points or more ○: Total score is 30 points or more and 34 points or less △: Total score is 20 points or more and 29 points or less ×: Total score is 19 points or less

The skin cosmetics of Examples 1 to 23 all had excellent storage stability and a smooth feel upon application, and there was little difference in the feel upon application when multiple applications were made.
In contrast, in Comparative Examples 1 to 4, sufficient performance was not obtained.
Comparative Example 1 did not contain component (A), and therefore the smooth feel upon application was insufficient, and there was a considerable difference in the feel upon application when reapplied.
Comparative Example 2 did not contain component (B), and therefore the smooth feel upon application was insufficient.
Comparative Example 3 did not contain component (C), and therefore had poor stability at low and high temperatures, did not provide an adequate smooth feel when applied, and there was a considerable difference in the feel when applied multiple times.
Comparative Example 4 did not contain component (D), and therefore had poor stability at low and high temperatures, and the smooth feel upon application was insufficient.
Next, formulation examples of the skin cosmetics of the present invention (Formulation Examples 1 and 2) are shown. These skin cosmetics of Formulation Examples also had excellent storage stability and a smooth feel upon application, and there was little difference in the feel when multiple applications were made.

Formulation Example 1: Gel-type skin cosmetic (mass%)
Ingredient (A) Natural water 3:60
Component (B) Dipotassium glycyrrhizinate: 0.1
Component (B) Niacinamide: 5
Component (C) 1,2-pentanediol: 2
Component (C) 1,3-butanediol: 8
Component (D) Sodium hyaluronate: 0.01
Component (E) Polyoxypropylene (20 mol) methyl glucoside: 0.1
Component (E) Polyoxyethylene (10 mol) polyoxypropylene (7 mol) butyl ether: 1
Glycerin: 5
Diglycerin: 1
Carboxyvinyl polymer: 0.2
Alkyl-modified carboxyvinyl polymer: 0.2
Arginine: 0.2
Polysorbate 80: 0.2
PEG-60 hydrogenated castor oil: 0.2
Ethylhexylglycerin: 0.2
Portulaca oleracea extract: 0.005
Ceramide 3: 0.0001
Glutamic acid: 0.001
Serine: 0.001
Proline: 0.001
Alanine: 0.001
Fragrance: appropriate amount Water: remaining amount

[Formulation Example 2] Emulsion-type skin cosmetic (mass %)
Ingredient (A) Natural water 3:50
Component (B) Dipotassium glycyrrhizinate: 0.1
Component (C) 1,2-pentanediol: 2
Component (C) 1,3-propanediol: 6
Component (C) Dipropylene glycol: 3
Component (D) Sodium hyaluronate: 0.02
Component (E) Polyoxybutylene (3 mol) Polyoxyethylene (8 mol) Polyoxypropylene (5 mol) Glyceryl ether: 1
Component (E) Polyoxyethylene (10 mol) polyoxypropylene (7 mol) butyl ether: 1
Ascorbyl glucoside: 2
Glycerin: 5
Diglycerin: 1
Carboxyvinyl polymer: 0.1
Alkyl-modified carboxyvinyl polymer: 0.1
Arginine: 0.1
Polysorbate 80: 0.5
PEG-75 stearate: 0.5
Glyceryl stearate: 1
Behenyl alcohol: 1
Olive fruit oil: 6
Cetyl ethylhexanoate: 6
Tocopherol: 0.1
Ethylhexylglycerin: 0.2
Portulaca oleracea extract: 0.005
Eucalyptus leaf extract: 0.005
Ceramide 3: 0.0001
Glutamic acid: 0.001
Serine: 0.001
Proline: 0.001
Alanine: 0.001
Fragrance: appropriate amount Water: remaining amount

The present invention provides a skin cosmetic that contains natural water and anti-inflammatory ingredients, has excellent storage stability, a smooth feel when applied, and provides an excellent feel even when applied multiple times.

Claims (1)

A skin cosmetic composition containing the following components (A), (B), (C), (D), and (E):
(A) 10 to 98 mass% natural water with a hardness of 10 to 100 mg/L , excluding seawater and treated seawater
(B) 0.001 to 10% by mass of a crystalline solid having a solubility in water of 0.5% or more at 25°C and having one or more anti-inflammatory effects selected from the group consisting of allantoin, dipotassium glycyrrhizinate, tranexamic acid, and niacinamide .
(C) 1 to 25% by mass of a dihydric alcohol having 3 to 6 carbon atoms
(D) 0.00001 to 0.05% by mass of acidic mucopolysaccharides
(E) 0.01 to 10 mass % of an alkylene oxide derivative represented by the following formula (1):

In formula (1), Z is a residue obtained by removing all hydroxyl groups from a compound having 1 to 7 carbon atoms and 1 to 4 hydroxyl groups,
x represents an integer of 1 to 4. EO is an oxyethylene group. PO is an oxypropylene group. BO is an oxybutylene group.
a is the average number of moles of the oxyethylene groups added and 0≦a≦100, b is the average number of moles of the oxypropylene groups added and 0≦b≦60, and c is the average number of moles of the oxybutylene groups added and 0≦c≦5, provided that a, b, and c are not simultaneously 0, and when neither a nor b is 0, (a/b) is 1/5 to 7/1, and EO, PO, and BO may be added randomly or in a block form, or may contain a mixture of random and block portions.