JP6844451B2 - Skin cosmetics - Google Patents

Description

The present invention relates to a skin cosmetic containing hydrogen carbonate spring water, which is expected to have a beauty effect. More specifically, a mild bubble feeling is obtained, a feeling of tension is lessened, a smooth finish feeling is obtained, and a moisturizing feeling is obtained. It is related to skin cosmetics that are excellent in and can suppress the shine of the skin.

The surface of human skin (skin) is covered with a sebum film formed by mixing sebum secreted from the sebaceous glands and sweat secreted from the sweat glands, and the evaporation of water from the skin is appropriately suppressed. There is. It is very important to keep the amount of water in the skin within an appropriate range from the viewpoint of skin health, because the lack of water in the skin tends to cause rough skin. Therefore, skin cosmetics such as lotion, milky lotion, cream, and beauty essence are used to supplement the moisture of the skin after washing the face or after bathing.

Many of these skin cosmetics contain water as a base. Focusing on the effect of water itself, cosmetics containing hot spring water, mineral spring water, deep sea water, etc., which are expected to have beauty effects, have been proposed. For example, they contain hot spring water classified as salt spring. A skin cosmetic containing a wiping water (Patent Document 1), deep sea water, and fresh water having a hardness of 100 mg / L or less (Patent Document 2) is disclosed. Natural water such as hot spring water and deep sea water is rich in natural inorganic salts, and is expected to have skin softening effect, exfoliating effect, tautness and skin shine improving effect, dullness improving effect, etc. ..
However, when natural water is added to skin cosmetics, turbidity and precipitation are likely to occur due to ions and the like contained in the natural water, and there is a problem in formulation stability. Therefore, as an external preparation with improved formulation stability, a skin external preparation in which alkaline simple hot spring water and a cell activator are used in combination has been proposed (Patent Document 3), but the effect of natural water itself can be fully exerted. It wasn't.

Further, in recent years, the blood flow promoting effect of carbonic acid has attracted attention, and it is expected to have an effect on the skin such as dullness improvement and an effect on hair such as hair growth. Some natural waters contain carbon dioxide gas, which gives a feeling of bubbles popping on the skin or scalp (bubble feeling), and when used on the skin or scalp, the above-mentioned effects are expected.
However, since carbon dioxide gas is released from the water over time and lost, there is a problem that it is difficult to obtain a bubble feeling even if carbon dioxide gas is added to the skin cosmetics, and it is difficult to obtain the expected effect. .. Therefore, an effervescent skin external preparation consisting of an acidic substance, a carbon dioxide generating substance that generates carbon dioxide gas by reacting with the acidic substance, a thickener and a water-soluble active ingredient is prepared, and water is added at the time of use. As a result, an external agent for skin that generates carbon dioxide gas, or two or more agents separated from each other, and one of the two or more agents reacts with an acidic substance and the acidic substance to generate carbon dioxide gas. For external use on the skin, which contains a carbon dioxide generating substance, contains a water-soluble active ingredient in one or more of the two or more agents, and mixes the two or more agents at the time of use to generate carbon dioxide. Although an agent has been proposed (Patent Document 4), the generated carbon dioxide gas may have a strong contact with the skin, and the effect of the carbon dioxide gas is not sufficiently sustained, so that the effect of natural water containing the carbon dioxide gas can be obtained. It was not something that could be fully demonstrated.

Japanese Unexamined Patent Publication No. 2008-174527 Japanese Unexamined Patent Publication No. 2014-234352 Japanese Unexamined Patent Publication No. 10-182411 Japanese Unexamined Patent Publication No. 2015-01089

Therefore, the present invention contains hydrogen carbonate spring water, which is known to have a beauty effect, to obtain a mild bubble feeling, less tension, a smooth feeling of the skin after use, and a long-lasting moisturizing feeling. It is an object of the present invention to provide a skin cosmetic that is excellent in and can suppress the shine of the skin.

As a result of diligent studies to solve the above problems, the present inventors have made a constituent unit based on a dihydric alcohol having 5 to 6 carbon atoms, 2- (meth) acryloyloxyethyl phosphorylcholine, and (meth) acrylic acid. By using a polymer containing a constituent unit based on alkyl at a specific molar ratio and content, the effect can be continuously and sufficiently exerted in a skin cosmetic containing hydrogen carbonate spring water. The present invention has been completed.

That is, the present invention relates to the following.
[1] (a) Bicarbonate spring water of 85% by mass to 99% by mass,
(B) 0.1% by mass to 10% by mass of dihydric alcohol having 5 to 6 carbon atoms, and
(C) Containing a structural unit based on 2- (meth) acryloyloxyethyl phosphorylcholine represented by the formula (I) and a structural unit based on the alkyl (meth) acrylate represented by the formula (II), the formula (I) is included. The molar ratio (I / II) of the structural unit (I) represented by and the structural unit (II) represented by the formula (II) is 100/0 to 10/90, and the total content of both structural units is A skin cosmetic containing 0.01% by mass to 10% by mass of one or more of the polymers having a content of 60% by mass to 100% by mass.

[In the formula, R ¹ indicates a hydrogen atom or a methyl group, and * indicates a binding site with another structural unit. ]

[In the formula, R ² indicates a hydrogen atom or a methyl group, R ³ indicates an alkyl group, and * indicates a binding site with another structural unit. ]
[2] The skin cosmetic according to claim 1, further containing 0.01% by mass to 10% by mass of the alkylene oxide-added derivative represented by the formula (d) (III).

[In the formula, Z is a residue obtained by removing the hydroxyl group from the compound having a hydroxyl group, and PO, EO and BO represent an oxypropylene group, an oxyethylene group and an oxybutylene group, respectively. l, m, and n represent the average number of moles added per hydroxyl group of the oxypropylene group, the oxyethylene group, and the oxybutylene group, respectively, and a is the number of hydroxyl groups of the compound having the residue represented by Z. ]

The skin cosmetic of the present invention contains hydrogen carbonate spring water, and its effect is exhibited sustainably and sufficiently.
That is, the skin cosmetic of the present invention can obtain a mild bubble feeling, less tension, a smooth feeling of the skin after use, an excellent sustainability of a moisturizing feeling, and can suppress the shine of the skin. ..

The skin cosmetics of the present invention include (a) hydrogen carbonate spring water, (b) a dihydric alcohol having 5 to 6 carbon atoms, and (c) 2- (meth) acryloyloxyethyl represented by the formula (I). Containing a structural unit based on phosphorylcholine and a structural unit based on alkyl (meth) acrylate represented by the formula (II), the structural unit (I) represented by the formula (I) and the structural unit represented by the formula (II). One or more of the polymers having a molar ratio (I / II) of (II) of 100/0 to 10/90 and a total content of both constituent units of 60% by mass to 100% by mass. Contains.

[In the formula, R ¹ indicates a hydrogen atom or a methyl group, and * indicates a binding site with another structural unit. ]

[In the formula, R ² indicates a hydrogen atom or a methyl group, R ³ indicates an alkyl group, and * indicates a binding site with another structural unit. ]
Each component (a) to (c) will be described below.

(A) Bicarbonate spring water The bicarbonate spring water contained as the component (a) in the skin cosmetics of the present invention is the hot spring water of the bicarbonate spring specified by the Hot Spring Law.
The bicarbonate spring water used as the component (a) in the skin cosmetics of the present invention is not particularly limited, and examples thereof include hydrogen carbonate spring waters such as Okura Onsen at the foot of Tsukiyama in Yamagata Prefecture, Ryujin Onsen in Wakayama Prefecture, and Otani Onsen in Nagano Prefecture. Be done.
In the present invention, as the above-mentioned bicarbonate spring water, hot spring water collected from hot springs in various places satisfying the criteria as "bicarbonate spring" may be used, or a product commercially available as a cosmetic raw material may be used. Good.

In the skin cosmetics of the present invention, one type of bicarbonate spring water as the component (a) may be used alone, or two or more types may be used in combination. Further, a part of the bicarbonate spring water may be replaced with ion-exchanged water as long as the effect of the present invention is not affected.
The content of the component (a) in the skin cosmetic of the present invention is usually 85% by mass to 99% by mass, preferably 90% by mass to 99% by mass, based on the total amount of the skin cosmetic.
When the content of the component (a) is less than 85% by mass, it may be difficult to obtain a bubble feeling or a smooth feeling of the skin after use.

(B) Dihydric alcohol having 5 to 6 carbon atoms The dihydric alcohol having 5 to 6 carbon atoms contained as the component (b) in the skin cosmetic of the present invention is a chain type having 5 to 6 carbon atoms. Compounds in which two carbon atoms of an aliphatic hydrocarbon are substituted with one hydroxyl group, for example, 1,2-pentanediol, 1,4-pentanediol, 1,5-pentanediol, 3-methyl-1,3 Examples thereof include −butanediol, 1,2-hexanediol, 1,6-hexanediol, etc., a condensate of ethylene glycol (for example, triethylene glycol), and a condensate of propylene glycol (for example, dipropylene glycol). Of these, 1,2-pentanediol, 1,4-pentanediol, 1,5-pentanediol, 1,2-hexanediol, and 1,6-hexanediol are preferable, and 1,2-pentanediol is preferable from the viewpoint of usability. , 1,2-Hexanediol is more preferred.

In the skin cosmetics of the present invention, one type of dihydric alcohol having 5 to 6 carbon atoms as the component (b) may be used alone, or two or more types may be used in combination.
The content of the component (b) in the skin cosmetic of the present invention is usually 0.1% by mass to 10% by mass, preferably 0.5% by mass to 8% by mass, based on the total amount of the skin cosmetic. , More preferably 1% by mass to 5% by mass.
(B) When the content of the component is less than 0.1% by mass, a feeling of tension may be felt, and a sufficient feeling of smoothness and moisturizing of the skin cannot be obtained after use. There is.
On the other hand, when the content of the component (b) exceeds 10% by mass, stickiness may occur and it may be difficult to obtain a smooth feeling of the skin after use.

(C) Containing a structural unit based on 2- (meth) acryloyloxyethyl phosphorylcholine represented by the formula (I) and a structural unit based on the alkyl (meth) acrylate represented by the formula (II), the formula (I) The molar ratio (I / II) of the structural unit (I) represented by and the structural unit (II) represented by the formula (II) is 100/0 to 10/90, and the total content of both structural units is One or more of the polymers having a content of 60% by mass to 100% by mass The polymer contained as the component (c) in the skin cosmetics of the present invention is 2- (meth) acryloyl represented by the formula (I). The structural unit (I) based on oxyethylphosphorylcholine and the structural unit (II) based on alkyl (meth) acrylate represented by the formula (II) are 100/0 to 10/90, preferably 100/0 to 30. It is contained in a molar ratio (I / II) of / 70, more preferably 95/5 to 50/50.
That is, the polymer contained as the component (c) in the present invention includes a polymer composed only of the structural unit (I) represented by the formula (I) and the structural unit (I) represented by the formula (I). , A copolymer composed of the structural unit (II) represented by the formula (II) is included.

[In the formula, R ¹ indicates a hydrogen atom or a methyl group, and * indicates a binding site with another structural unit. ]

[In the formula, R ² indicates a hydrogen atom or a methyl group, R ³ indicates an alkyl group, and * indicates a binding site with another structural unit. ]

Here, "(meth) acryloyl" means "acryloyl or methacrylic acid", and "(meth) acrylic acid" means "acrylic acid or methacrylic acid".

The molar ratio of the structural unit (I) based on 2- (meth) acryloyloxyethyl phosphorylcholine represented by the formula (I) to the structural unit (II) based on the alkyl (meth) acrylate represented by the formula (II). If I / II) is smaller than 10/90, it may not be possible to obtain a mild bubble feeling or a moisturizing feeling.
The total content of both constituent units in the polymer is usually 60% by mass to 100% by mass, preferably 70% by mass to 100% by mass, and more preferably 80% by mass to 100% by mass. Is.
If the total content of both constituent units in the polymer is less than 60% by mass, a mild bubble feeling and a long-lasting moisturizing feeling may not be obtained.

The alkyl group represented by the formula (II) Medium R ^3, include straight or branched chain alkyl group having 1 to 6 carbon atoms, preferably the alkyl group having 2 to 5 carbon atoms, 3-4 carbon atoms The alkyl group is more preferred.
Specific examples of the alkyl (meth) acrylate constituting the structural unit represented by the formula (II) include, for example, methyl methacrylate, ethyl acrylate, ethyl methacrylate, propyl acrylate, propyl methacrylate, isopropyl acrylate, and the like. Examples thereof include isopropyl methacrylate, butyl acrylate, and butyl methacrylate.

As the component (c), a copolymer containing a component other than the above-mentioned two structural units can also be used.
The constituent components that can be contained in such a copolymer are not particularly limited as long as they are constituent components based on a monomer having an addition-polymerizable double bond. Examples of the monomer having a double bond capable of addition polymerization include olefinic hydrocarbons such as ethylene, propylene, butene, isobutene and styrene and their isomers, and various derivatives thereof; acrylic acid, methacrylic acid and vinyl acetate. , Itaconic acid, crotonic acid, maleic acid, fumaric acid and other ethylenically unsaturated carboxylic acids, their anhydrides, and esters with alcohols having 1 to 6 carbon atoms (constituting the structural unit represented by the above formula (II)). (Excluding alkyl (meth) acrylate), and ethylenically unsaturated carboxylic acid derivatives into which carbonyl group, amino group, cyano group, nitrile group, etc. are introduced; vinyl alcohol and esters of this with various carboxylic acids, various alcohols Examples thereof include ethers with and, and vinyl alcohol derivatives into which a carbonyl group, an amino group, a cyano group, a nitrile group and the like are introduced.

The weight average molecular weight of the polymer used as the component (c) in the present invention as measured by the gel permeation chromatography (GPC) method is preferably 10,000 daltons to 10,000,000 daltons, and more preferably 50. It ranges from 1,000 daltons to 5,000,000 daltons.

In the present invention, the polymer used as the component (c) contains a constituent monomer containing 2- (meth) acryloyloxyethyl phosphorylcholine and alkyl (meth) acrylate, and the molar ratio (I / II) of both constituent units and the above-mentioned constituent units. It may be prepared and used by polymerizing under conditions that satisfy the content, but a commercially available product may also be used.
Examples of such commercially available products include "LIPIDURE (registered trademark) -HM" (2-methacryloyloxyethyl phosphorylcholine polymer) and "LIPIDURE (registered trademark) -PMB" (2) manufactured by NOF CORPORATION. − Methacloyloxyethyl phosphorylcholine / butyl methacrylate copolymer) and the like.

In the skin cosmetics of the present invention, as the component (c), one kind may be selected from the above-mentioned polymers and used alone, or two or more kinds may be selected and used in combination.
The content of the component (c) in the skin cosmetic of the present invention is usually 0.01% by mass to 10% by mass, preferably 0.05% by mass to 5% by mass, and further, based on the total amount of the cosmetic. It is preferably 0.1% by mass to 2% by mass.
When the content of the component (c) is less than 0.01% by mass, it may be difficult to obtain a mild bubble feeling or a moisturizing feeling. On the other hand, when the content of the component (c) exceeds 10% by mass, stickiness may occur or it may be difficult to obtain a smooth feeling of the skin.

The skin cosmetic of the present invention may further contain an alkylene oxide-added derivative represented by the formula (d) (III).

[In the formula, Z is a residue obtained by removing the hydroxyl group from the compound having a hydroxyl group, and PO, EO and BO represent an oxypropylene group, an oxyethylene group and an oxybutylene group, respectively. l, m, and n represent the average number of moles added per hydroxyl group of the oxypropylene group, the oxyethylene group, and the oxybutylene group, respectively, and a is the number of hydroxyl groups of the compound having the residue represented by Z. ]

(D) The alkylene oxide-added derivative represented by the formula (III) The alkylene oxide-added derivative represented by the formula (III) used as the component (d) in the skin cosmetics of the present invention is oxy to the hydroxyl group of the compound having a hydroxyl group. It is a compound to which a propylene group, an oxyethylene group and an oxybutylene group are added.

The compound having a hydroxyl group is preferably a compound having three or more hydroxyl groups, for example, a trivalent or higher polyhydric alcohol such as glycerin, trimethylolpropane, diglycerin; ribose, xylose, arabinose, xylrose, glucose. Monosaccharides such as galactose and fructose; disaccharides such as sucrose, trehalose and maltose; alkyl glycosides such as methyl glucoside; sugar alcohols such as erythritol, pentaerythritol, sorbitol, xylitol, dipentaerythritol, sorbitol, maltitol; inositol Such as cyclitol and the like.
For the purpose of the present invention, as the compound having a hydroxyl group, glycerin and alkylglucoside are preferable, glycerin and methylglucoside are more preferable, and glycerin is further preferable.
In the formula (III), the number of hydroxyl groups represented by a, that is, the number of hydroxyl groups to which the alkylene oxide is added is preferably 3 to 9, and more preferably 3 to 6. If a is less than 3, a sufficient moisturizing feeling may not be obtained, and if it exceeds 9, a sticky feeling may occur.

In the formula (III), the oxypropylene group represented by PO may be either a straight chain or a branched chain, but an oxypropylene group obtained from 1,2-epoxypropane is preferable. In the formula (III), the average number of moles added per hydroxyl group of the oxypropylene group represented by l is preferably 1 or more and 50 or less, and more preferably 1 or more and 20 or less.
If the average number of moles of oxypropylene group added is less than 1, a sticky feeling may occur, and if it exceeds 50, the moisturizing feeling may decrease.
In the formula (III), the average number of moles added per hydroxyl group of the oxyethylene group represented by EO is preferably 1 or more and 50 or less, and more preferably 2 or more and 20 or less.
If the average number of moles m per hydroxyl group of the oxyethylene group is less than 1, the moisturizing sensation may decrease, and if it exceeds 50, a sticky sensation may occur.
In the formula (III), the oxybutylene group represented by BO may be either a straight chain or a branched chain, but an oxybutylene group obtained by 1,2-butylene oxide is preferable. In the formula (III), the average number of moles added per hydroxyl group of the oxybutylene group represented by n is preferably 0.5 or more and 5 or less, and more preferably 0.8 or more and 3 or less.
If the average number of moles n added per hydroxyl group of the oxybutylene group is less than 0.5, a sticky feeling may occur, and if it exceeds 5, the moisturizing feeling may decrease.

In the alkylene oxide-added derivative represented by the formula (III), the content ratio (PO / EO) of the oxypropylene group represented by PO and the oxyethylene group represented by EO is preferably 1/5 by weight. It is ~ 5/1, more preferably 1/4 to 4/1. If the content ratio (PO / EO) of the oxypropylene group to the oxyethylene group is less than 1/5, a sticky feeling may occur, and if it exceeds 5/1, the moisturizing feeling may decrease.
Further, it is preferable that the oxypropylene group and the oxyethylene group are randomly added to the compound having a hydroxyl group. The oxybutylene group is added in a block form at the end of the alkylene oxide chain (ie, to the adduct of the oxypropylene group and the oxyethylene group).
The alkylene oxide addition derivative represented by the above formula (III) can be appropriately produced and used by an alkylene oxide addition reaction known per se, but is provided by NOF CORPORATION, etc. "WILBride" (registered). Commercially available products such as "S-753" and "WILBRIDE (registered trademark) MG-2070" can also be used.

In the skin cosmetics of the present invention, one type of alkylene oxide-added derivative represented by the above formula (III) may be used alone, or two or more types may be used in combination.
The content of the component (d) in the skin cosmetics of the present invention is preferably 0.01% by mass to 10% by mass, more preferably 0.05% by mass to 5% by mass, based on the total amount of the cosmetics. , More preferably 0.1% by mass to 3% by mass.
If the content of the component (d) is less than 0.01% by mass, it may not be possible to suppress the feeling of tension, or it may be difficult to obtain a long-lasting moisturizing feeling. On the other hand, if it exceeds 10% by mass, stickiness may occur or it may be difficult to obtain a smooth feeling of the skin.

The skin cosmetic of the present invention includes a solvent, a moisturizer, a skin conditioning agent, an anti-inflammatory / rough skin inhibitor, a cell activator, a whitening agent, a surfactant, and a thickening agent, as long as the characteristics of the present invention are not impaired. -It is also possible to contain additives generally used for skin cosmetics and skin medicines such as gelling agents, pH adjusting agents, chelating agents, antioxidants, preservatives, pigments, pigments and fragrances. As these additives, one kind or two or more kinds can be used as needed.

The skin cosmetic of the present invention can be provided in the form of a solution, a suspension, a milky lotion, a gel, a cream, a mist, etc., for example, a lotion, a milky lotion, a beauty essence, a gel, a cream, etc. The dosage form can be taken.

The skin cosmetic of the present invention contains hydrogen carbonate spring water, and gives a mild bubble feeling, less tension, a smooth feeling of the skin after use, and an excellent lasting moisturizing feeling of the skin. It can suppress shine.

Next, the present invention will be described in more detail with reference to Examples and Comparative Examples.

[Examples 1 to 5, Comparative Examples 1 to 3]
Each component shown in Table 1 was mixed and uniformly dissolved to prepare the lotions of Examples 1 to 5 and Comparative Examples 1 to 3.
The components used in the preparation of each of the cosmetic waters of Examples and Comparative Examples are as follows.
(1) Bicarbonate spring water: Okura hot spring water at the foot of Mt. Tsukiyama, Yamagata Prefecture (hydrogen carbonate ion content = 3,400 mg / kg)
(2) 2-methacryloyloxyethyl phosphorylcholine polymer solution: "LIPIDURE (registered trademark) -HM", manufactured by Nichiyu Co., Ltd .; polymer of 2-methacryloyloxyethyl phosphorylcholine (weight average molecular weight = about 100,000) (3) 2-methacryloyloxyethyl phosphorylcholine-butyl methacrylate copolymer solution: "LIPIDURE (registered trademark) -PMB", manufactured by Nichiyu Co., Ltd .; 2-methacryloyloxyethyl phosphorylcholine Contains 5% by mass of a copolymer (weight average molecular weight = about 600,000) in which the molar ratio (MPC / BMA) of the constituent unit (MPC) based on the constituent unit (MPC) and the constituent unit (BMA) based on butyl methacrylate is 4/1. Aqueous solution (4) Polyoxybutylene polyoxyethylene polyoxypropylene glyceryl ether (alkylene oxide-added derivative of glycerin): "WILBRIDE (registered trademark) S-753", manufactured by Nichiyu Co., Ltd .; total of oxypropylene groups Number of added moles = 5, total number of added moles of oxyethylene group = 8, total number of added moles of oxybutylene group = 3
(5) 1,2-Pentanediol, 1,2-hexanediol, 1,2-butanediol, sodium hydrogen carbonate and phenoxyethanol: Commercially available products for cosmetics were used.

For each of the lotions of Examples and Comparative Examples, sensory evaluation was performed using 20 women (25 to 45 years old) as panelists.
That is, after washing the face, each panelist was allowed to use each of the lotions of the examples and the comparative examples on the entire face, and the mild bubble feeling, the tight feeling, the smooth feeling of the skin, the sustainability of the moisturizing feeling, and the shine of the skin were discussed. The evaluation was performed according to each of the following evaluation criteria.
Regarding the evaluation results, the total score of the evaluation points of 20 persons was obtained, and the evaluation was made according to each of the following criteria.
The results are also shown in Table 1.

(1) Mild bubble feeling <Evaluation criteria>
2 points: When you feel a mild bubble feeling.
1 point: When you feel a slight bubble feeling.
0 points: When you do not feel a mild bubble feeling.
<Criteria>
⊚: The total score is 35 points or more, and the panelists who evaluated it as 0 points are 0: It is a lotion with a mild bubble feeling.
◯: The total score is 25 points or more and less than 35 points, or the total score is 35 points or more and the number of panelists evaluated as 0 points is 1 or more and 2 or less: Toner with a mild bubble feeling. is there.
Δ: The total score is 15 points or more and less than 25 points: It is a lotion with a mild bubble feeling.
X: Total score is less than 15 points: Toner with no mild bubble feeling.

(2) Tightness <Evaluation criteria>
2 points: When you feel that there is no feeling of tension.
1 point: When you feel a little taut.
0 points: When you feel a sense of tension.
<Criteria>
⊚: The total score is 35 points or more, and the panelists who evaluated it as 0 points are 0: It is a lotion without a feeling of tension.
◯: The total score is 25 points or more and less than 35 points, or the total score is 35 points or more and the number of panelists evaluated as 0 points is 1 or more and 2 or less: The lotion has almost no feeling of tension.
Δ: The total score is 15 points or more and less than 25 points: The lotion has a slightly taut feeling.
X: The total score is less than 15 points: The lotion has a taut feeling.

(3) Smoothness of the skin <Evaluation criteria>
2 points: When the skin feels smooth.
1 point: When the skin feels a little smooth.
0 points: When the skin feels non-smooth.
<Criteria>
⊚: The total score is 35 points or more, and the panelists who evaluated it as 0 points are 0: The skin is very smooth.
◯: The total score is 25 points or more and less than 35 points, or the total score is 35 points or more and the number of panelists evaluated as 0 points is 1 or more and 2 or less: The skin is smooth.
Δ: The total score is 15 points or more and less than 25 points: A lotion that makes the skin slightly smooth.
X: The total score is less than 15 points: The skin is not smooth.

(4) Persistence of moisturizing sensation The persistence of moisturizing sensation was evaluated by the moisturizing sensation 3 hours after each lotion was used.
<Evaluation criteria>
2 points: When you feel that the moisturizing feeling is sustained.
1 point: When you feel that the moisturizing feeling is slightly sustained.
0 points: When you feel that the moisturizing feeling is not sustained.
<Criteria>
⊚: The total score is 35 points or more, and the panelists who evaluated it as 0 points are 0: The lotion has a very long-lasting moisturizing feeling.
◯: The total score is 25 points or more and less than 35 points, or the total score is 35 points or more and the number of panelists evaluated as 0 points is 1 or more and 2 or less: The lotion has a long-lasting moisturizing feeling.
Δ: The total score is 15 points or more and less than 25 points: A lotion with a slightly long-lasting moisturizing feeling.
X: Total score is less than 15 points: Toner that does not maintain a moisturizing feeling.

(5) Skin shine The skin shine was evaluated by the skin shine felt 3 hours after each lotion was used.
<Evaluation criteria>
2 points: When the skin feels not shiny 1 point: When the skin feels slightly shiny 0 points: When the skin feels shiny.
<Criteria>
⊚: The total score is 35 points or more, and the panelists who evaluated it as 0 points are 0: It is a lotion that can greatly suppress the shine of the skin.
◯: The total score is 25 points or more and 35 points, or the total score is 35 points or more and the number of panelists evaluated as 0 points is 1 or more and 2 or less: A lotion that can suppress the shine of the skin. is there.
Δ: The total score is 15 points or more and less than 25 points: A lotion that can slightly suppress the shine of the skin.
X: Total score is less than 15 points: Toner that cannot suppress the shine of the skin.

As shown in Table 1, all of the lotions of Examples 1 to 5 of the present invention were evaluated to have a mild bubble feeling and no or almost no feeling of tension. In addition, it was evaluated that a smooth feeling of the skin was obtained after use, the moisturizing feeling was excellent in sustainability, and the shine of the skin was suppressed. In particular, with respect to the lotion of Example 5 containing the component (d) in addition to the components (a) to (c), good evaluations were obtained in all the evaluation items.
On the other hand, the lotion of Comparative Example 1 containing an aqueous solution (component (a)) containing sodium hydrogencarbonate having the same concentration as the component (a) instead of the component (a) has a long-lasting moisturizing sensation. Except, no sufficient effect was observed.
Further, the lotion of Comparative Example 2 containing 1,2-butanediol having 4 carbon atoms (component (b')) instead of the component (b), and Comparative Example 3 not containing the component (c). No sufficient effect was observed in all the endpoints of the lotion.

As described in detail above, according to the present invention, it contains hydrogen carbonate spring water, a mild bubble feeling is obtained, a feeling of tightness is small, a smooth feeling of the skin is obtained after use, and the moisturizing feeling is excellent in sustainability. , It is possible to provide a skin cosmetic that can suppress the shine of the skin.

Claims (2)

(A) Bicarbonate spring water of 85% by mass to 99% by mass,
(B) 0.1% by mass to 10% by mass of dihydric alcohol having 5 to 6 carbon atoms, and
(C) Containing a structural unit based on 2- (meth) acryloyloxyethyl phosphorylcholine represented by the formula (I) and a structural unit based on the alkyl (meth) acrylate represented by the formula (II), the formula (I) is included. The molar ratio (I / II) of the structural unit (I) represented by and the structural unit (II) represented by the formula (II) is 100/0 to 10/90, and the total content of both structural units is A skin cosmetic containing 0.01% by mass to 10% by mass of one or more of the polymers having a content of 60% by mass to 100% by mass.
[In the formula, R ¹ indicates a hydrogen atom or a methyl group, and * indicates a binding site with another structural unit. ]
[In the formula, R ² indicates a hydrogen atom or a methyl group, R ³ indicates an alkyl group, and * indicates a binding site with another structural unit. ] The skin cosmetic according to claim 1, further containing 0.01% by mass to 10% by mass of the alkylene oxide-added derivative represented by the formula (d) (III).
[In the formula, Z is a residue obtained by removing the hydroxyl group from the compound having a hydroxyl group, and PO, EO and BO represent an oxypropylene group, an oxyethylene group and an oxybutylene group, respectively. l, m, and n represent the average number of moles added per hydroxyl group of the oxypropylene group, the oxyethylene group, and the oxybutylene group, respectively, and a is the number of hydroxyl groups of the compound having the residue represented by Z. ]