Skin cosmetic

Abstract

Provided is a skin cosmetic that is excellent in comfort during application, has an effect of removing pore dirt when wiped off and used, and maintains a state where pores are not noticeable even after wearing a mask. 【Solution means】(A) 1,3-propanediol is 1 to 20% by mass, (B) 1,2-pentanediol is 0.5 to 4% by mass, (C) glycerin mono 2-ethylhexyl ether is 0.01 to 0.5% by mass, and (D) an extract from citrus fruits is contained in an amount of 0.0001 to 0.1% by mass in terms of solid content, and provided is a phenoxyethanol-free skin cosmetic.

Description

Technical Field

[0001] The present invention relates to a skin cosmetic used for moisturizing the skin of the face, body, etc.

Background Art

[0002] Various moisturizers are formulated in skin cosmetics for moisturizing the skin. However, when using a skin cosmetic with a high content of moisturizer, there is a problem of feeling sticky. Also, depending on the type of moisturizer, irritation may be felt. When feeling sticky or irritated, the comfort during application decreases, so it is desired to reduce stickiness and irritation.

[0003] Preservatives such as parabens and phenoxyethanol are formulated for the purpose of enhancing the storage stability of cosmetics, but these preservatives may also cause irritation. In recent years, the number of consumers who consider their own skin to be sensitive has been increasing, and in cosmetics targeted at such consumers, it has been required to formulate without parabens and phenoxyethanol.

[0004] Patent Document 1 discloses a low-irritation cosmetic containing at least three or more preservatives excluding phenoxyethanol, paraoxybenzoic acid ester, and 1,2-hexanediol.

[0005] On the other hand, cosmetics have come to be required to have multifunctionality. For example, all-in-one cosmetics that combine the functions of lotion, essence, and emulsion have been developed. Also, for shortening the time, skin cosmetics that can simultaneously remove dirt and moisturize by soaking into cotton, etc. have been developed, but it has not been easy to achieve both the effect of removing pore dirt and non-irritation.

[0006] For example, in Citation 2, it is disclosed that a lotion for wiping containing a specific polyoxyalkylene methyl glucoside, ethanol, and an extract of grape fruits has an excellent sebum-removing effect. However, since it contains ethanol, some people with sensitive skin may feel irritation when using it.

Prior Art Documents

Patent Documents

[0007]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0008] Furthermore, in recent years, the opportunity to wear masks has increased. However, since the amount of sebum secretion increases when wearing a mask, it has been a problem that pores become prominent after directly using the mask. Therefore, there is a demand for a skin cosmetic that is excellent in the comfort during application, has an excellent effect of removing pore dirt when wiped and used, and can maintain a state where pores are not prominent.

[0009] As described above, a skin cosmetic that is excellent in the comfort during application, has an effect of removing pore dirt when wiped and used, and can maintain a state where pores are not prominent even after wearing a mask has not yet been developed.

[0010] An object of the present invention is to provide a skin cosmetic that is excellent in the comfort during application, has an effect of removing pore dirt when wiped and used, and can maintain a state where pores are not prominent even after wearing a mask.

Means for Solving the Problems

[0011] To solve the above problems, as a result of intensive studies by the present inventors, by adding a predetermined amount of glycerin mono-2-ethylhexyl ether and an extract obtained from citrus fruits to a cosmetic containing a predetermined amount of 1,3-propanediol and 1,2-pentanediol, it has excellent comfort during application, has an effect of removing pore dirt when wiped off and used, and it has been found that the state where pores are not noticeable continues even after wearing a mask, and thus the present invention has been completed.

[0012] That is, the present invention relates to the following [1], [2], and [3]. [1] A phenoxyethanol-free skin cosmetic, characterized by containing: (A) 1 to 20% by mass of 1,3-propanediol, (B) 0.5 to 4% by mass of 1,2-pentanediol, (C) 0.01 to 0.5% by mass of glycerin mono-2-ethylhexyl ether, and (D) 0.0001 to 0.1% by mass in terms of solid content of an extract from citrus fruits. [2] The skin cosmetic according to [1], further characterized by containing (E) 0.05 to 1.6% by mass of polyoxyethylene sorbitan fatty acid ester. [3] The skin cosmetic according to [1] or [2], characterized by containing 0.1 to 10% by mass of one or more water-soluble components selected from the group consisting of ascorbic acid 2-glucoside, tranexamic acid, and nicotinamide. [Effects of the Invention]

[0013] According to the present invention, it is possible to provide a skin cosmetic that has excellent comfort during application, has an effect of removing pore dirt when wiped off and used, and the state where pores are not noticeable continues even after wearing a mask. [Modes for Carrying Out the Invention]

[0014] Hereinafter, embodiments of the present invention will be described. The present invention relates to a skin cosmetic containing each of the above components in a specific ratio (hereinafter, also referred to as the skin cosmetic of the present invention).

[0015] In the present invention, the "skin cosmetic" is a cosmetic applied directly or indirectly to the skin by coating or spraying, and specifically includes basic cosmetics such as lotion, emulsion, cream, and medicinal cosmetics (quasi-drugs). In addition, in this specification, the numerical range defined using the symbol "~" shall include the numerical values at both ends (upper limit and lower limit) of "~". For example, "2~5" represents 2 or more and 5 or less.

[0016] <(A) 1,3 - propanediol> The content of 1,3 - propanediol shall be 1 to 20% by mass based on the total amount of the skin cosmetic. If the content of 1,3 - propanediol is less than 1% by mass, the comfort during application may be insufficient, the effect of removing pore dirt when wiped off may decrease, or the state where pores are not noticeable after wearing a mask may not be sustained. Therefore, it shall be 1% by mass or more, preferably 2% by mass or more, and more preferably 3% by mass or more. Also, if the content of 1,3 - propanediol exceeds 20% by mass, the comfort during application may be insufficient. Therefore, it shall be 20% by mass or less, preferably 18% by mass or less, and more preferably 16% by mass or less.

[0017] <(B) 1,2 - pentanediol> The content of 1,2 - pentanediol shall be 0.5 to 4% by mass based on the total amount of the skin cosmetic. If the content of 1,2 - pentanediol is less than 0.5% by mass, the effect of removing pore dirt when wiped off may decrease, or the state where pores are not noticeable after wearing a mask may not be sustained. Therefore, it shall be 0.5% by mass or more, preferably 1% by mass or more, and more preferably 1.5% by mass or more. Also, if the content of 1,2 - pentanediol exceeds 4% by mass, the comfort during application may be insufficient, or the state where pores are not noticeable after wearing a mask may not be sustained. Therefore, it shall be 4% by mass or less, preferably 3.5% by mass or less, and more preferably 3% by mass or less.

[0018] <(C) Glyceryl mono-2-ethylhexyl ether> The content of glyceryl mono-2-ethylhexyl ether shall be 0.01 to 0.5% by mass based on the total amount of the skin cosmetic. If the content of glyceryl mono-2-ethylhexyl ether is less than 0.01% by mass, the effect of removing pore dirt may decrease when wiped and used, so it shall be 0.01% by mass or more, preferably 0.03% by mass or more, and more preferably 0.05% by mass or more. Also, if the content of glyceryl mono-2-ethylhexyl ether exceeds 0.5% by mass, the comfort during application may be insufficient, or the state where pores are not noticeable after wearing a mask may not be sustainable, so it shall be 0.5% by mass or less, preferably 0.45% by mass or less, and more preferably 0.4% by mass or less.

[0019] <(D) Extract from citrus fruits> The component (D) used in the present invention is an extract obtained from citrus fruits. The citrus fruits of the present invention are plants belonging to the genus Citrus of the family Rutaceae. Examples of plants belonging to the genus Citrus of the family Rutaceae include Citrus unshiu, Citrus depressa, Citrus tachibana, Citrus aurantifolia, Citrus aurantium, Citrus limon, Citrus sinensis, Citrus junos, Citrus natsudaidai, Citrus paradisi, etc. Preferably, they are Citrus depressa, Citrus tachibana, Citrus aurantium, Citrus limon, Citrus junos, Citrus paradisi, and more preferably Citrus aurantium, Citrus limon.

[0020] (D) The extract from citrus fruits is an extract obtained from the fruits, fruit juices, peels, and seeds of citrus fruits. (D) The extract (plant extract) can be obtained by directly using citrus fruits or seeds as they are or after pulverization and extracting them with an extraction solvent, but is not limited thereto. These components are also available as commercially available cosmetic raw materials. Generally, citrus extracts contain 0.1 to 3.0% by mass of solids such as citrus fruits and seeds.

[0021] In the present invention, examples of the extraction solvent used for extraction from citrus fruits include water and aqueous solvents. Examples of the aqueous solvent include esters such as ethyl acetate; ketones such as acetone; ethers such as diethyl ether, tetrahydrofuran, and diethylene glycol ether; and alcohols such as lower alcohols and polyhydric alcohols. Among them, from the viewpoints of safety and good extraction efficiency, water; lower alcohols such as methanol, ethanol, propanol, and isopropanol; and polyhydric alcohols such as propylene glycol, dipropylene glycol, 1,3-butylene glycol, and glycerin are preferred, and water, 1,3-butylene glycol, and glycerin are more preferred.

[0022] In the present invention, one kind selected from the above extraction solvents may be used alone, or a mixed solvent in which two or more kinds are combined may be used, and a mixed solvent of water and 1,3-butylene glycol is more preferred. For the extraction treatment with a solvent, for example, when the extraction solvent is water, it can usually be extracted in an amount of 100 to 2000 parts by mass, preferably 200 to 1000 parts by mass, based on 100 parts by mass of the plant. Similarly, when the extraction solvent is a lower alcohol, it can usually be extracted in an amount of 100 to 5000 parts by mass, preferably 500 to 2000 parts by mass.

[0023] The extraction temperature is appropriately determined according to the type of extraction solvent used. For example, when the extraction solvent is water, the extraction temperature is usually about 20 to 120°C, and when the extraction solvent is a lower alcohol, the extraction temperature is usually about 30 to 80°C.

[0024] As an extraction method, a general method is adopted. For example, an extraction solvent is added to undried plants or dried plants for immersion, and in some cases, after stirring or the like, the extract can be obtained by filtration. Examples of the method for drying plants include air drying, warm drying, freeze drying, etc. The plants may be appropriately cut into small pieces from the viewpoint of extraction efficiency.

[0025] The extraction time (immersion time) is usually 1 hour or more, preferably 3 hours or more, and more preferably 5 hours or more. From the viewpoint of extraction efficiency, the upper limit of the extraction time is usually 10 hours or less, preferably 8 hours or less. The number of extractions is not particularly limited, but it is preferable to perform one extraction with the above amount of water or aqueous solvent.

[0026] The obtained extract may be used as it is, or concentrated by solvent distillation, and if necessary, purified by treatments such as column chromatography or solvent fractionation, and further dried, etc. before use.

[0027] This extract can be diluted with polyhydric alcohols such as water, glycerin, and 1,3 - butylene glycol for easy handling. Commercially available extracts may be used.

[0028] (D) The content of the extract from citrus fruits shall be 0.0001 to 0.1% by mass in terms of solid content based on the total amount of the skin cosmetic. However, the solid content conversion amount mentioned here means the amount of solid content (evaporation residue) obtained by removing liquid components such as the extraction solvent by evaporation from the extract from citrus fruits. If the content of the extract from citrus fruits is less than 0.0001% by mass in terms of solid content, the state where pores are not noticeable after wearing the mask may not be sustained, so it shall be 0.0001% by mass or more, preferably 0.0003% by mass or more, and more preferably 0.0005% by mass or more. Also, if the content of the extract from citrus fruits exceeds 0.1% by mass in terms of solid content, the effect corresponding to the blending amount cannot be obtained, so it shall be 0.1% by mass or less, preferably 0.05% by mass or less, and more preferably 0.02% by mass or less.

[0029] From the viewpoint of improving the comfort during application, the mass ratio ((A) / (B)) of the content of (A) 1,3 - propanediol to the content of (B) 1,2 - pentanediol is preferably 1 to 15, more preferably 2 to 10, and particularly preferably 3 to 6.

[0030] From the viewpoint of sustaining the state where pores are not noticeable after wearing the mask, the mass ratio ((C) / (D)) of the content of (C) glycerin mono 2 - ethylhexyl ether to the content of the extract from citrus fruits (solid content conversion amount) (D) is preferably 5 to 1000, more preferably 10 to 500, and particularly preferably 30 to 300.

[0031] <(E) Polyoxyethylene sorbitan fatty acid ester> (E) Polyoxyethylene sorbitan fatty acid ester is an ester reaction product of polyoxyethylene sorbitan and a fatty acid. The fatty acid forming (E) polyoxyethylene sorbitan fatty acid ester preferably has 12 to 18 carbon atoms and may be either saturated or unsaturated.

[0032] In addition, the number of moles of ethylene oxide added in the polyoxyethylene group of (E) polyoxyethylene sorbitan fatty acid ester is preferably 10 to 40, more preferably 15 to 30. Further, (E) polyoxyethylene sorbitan fatty acid ester is preferably a monoester.

[0033] Examples of the polyoxyethylene sorbitan fatty acid ester include polyoxyethylene sorbitan monolaurate, polyoxyethylene sorbitan monostearate, polyoxyethylene sorbitan monooleate (polysorbate 80), etc. Particularly preferred are polyoxyethylene sorbitan monostearate and polyoxyethylene sorbitan monooleate.

[0034] The content of (E) polyoxyethylene sorbitan fatty acid ester is preferably 0.05 to 1.6% by mass, more preferably 0.1 to 1.2% by mass, and still more preferably 0.2 to 0.8% by mass based on the total amount of the skin cosmetic. When the content of (E) polyoxyethylene sorbitan fatty acid ester is within the above range, the comfort during application and the effect of removing pore dirt when wiped off and used are further improved.

[0035] <(F) Water-soluble component> The (F) water-soluble component used in the present invention is one or more water-soluble components selected from ascorbic acid 2-glucoside, tranexamic acid, and nicotinamide, and particularly preferably nicotinamide.

[0036] The content of the (F) water-soluble component is preferably 0.1 to 10% by mass, more preferably 0.5 to 8% by mass, and still more preferably 0.8 to 6% by mass based on the total amount of the skin cosmetic. When the content of the (F) water-soluble component is within the above range, the effect of maintaining the state where pores are not noticeable after wearing the mask is further improved.

[0037] The water content in the skin cosmetic of the present invention is preferably 45 to 97% by mass, more preferably 50 to 95% by mass, and particularly preferably 55 to 93% by mass. As water, in addition to ion-exchanged water and distilled water, natural water containing minerals, aromatic water such as rose water, and fermentation liquids such as sake lees fermentation liquid fermented by yeast using rice bran as a substrate can also be used.

[0038] <Excluded components> The skin cosmetic of the present invention is a low-irritation skin cosmetic that does not contain phenoxyethanol as a preservative. When the skin cosmetic contains phenoxyethanol, the comfort during application is inferior. More preferably, the skin cosmetic is a paraben-free low-irritation skin cosmetic that does not contain paraoxybenzoic acid ester as a preservative.

[0039] <Other additive components> In addition to the above components and water, the skin cosmetic of the present invention may further contain general components used in cosmetics as other additive components.

[0040] Examples of other additive components include humectants (excluding (A) 1,3-propanediol and (B) 1,2-pentanediol); oils; surfactants; preservatives (excluding at least phenoxyethanol); thickeners; pH adjusters; antioxidants; sequestering agents; fragrances; pigments; dyes; 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, based on the total amount of the skin cosmetic.

[0041] The skin cosmetic of the present invention can be produced by a known method. For example, (A) 1,3-propanediol, (B) 1,2-pentanediol, (C) glycerin mono-2-ethylhexyl ether, (D) extract from citrus fruits, and optionally (E) polyoxyethylene sorbitan fatty acid ester, (F) one or more water-soluble components selected from ascorbic acid 2-glucoside, tranexamic acid, and nicotinamide are mixed and adjusted to an appropriate pH as needed to produce the skin cosmetic of the present invention.

[0042] The skin cosmetic of the present invention can be made into dosage forms such as liquid, gel, emulsion, cream, etc., and is used on the face, body, etc.

Examples

[0043] Hereinafter, the present invention will be described in more detail with reference to Examples and Comparative Examples. <Examples 1 to 17, Comparative Examples 1 to 5> Each skin cosmetic shown in Tables 1 to 3 was prepared by a known method and evaluated by the following method.

[0044] In Tables 1 to 3, the numerical values of each component indicate the content (% by mass) with respect to the total amount of the skin cosmetic. Also, (A) / (B) indicates the mass ratio of the content of (A) 1,3-propanediol to the content of (B) 1,2-pentanediol. (C) / (D) indicates the mass ratio of the content of (C) glycerin mono 2-ethylhexyl ether to the content of (D) extract from citrus fruits (in terms of solid content).

[0045] <Evaluation method> (1) Evaluation of the comfort during application Twenty women aged 25 to 55 were used as panelists, and 1 g of the skin cosmetic was taken in the palm and applied to the face, and the comfort was evaluated according to the following criteria. 2 points: When there is no stickiness or irritation and it feels very comfortable. 1 point: When there is almost no stickiness or irritation and it feels comfortable. 0 point: When there is stickiness or irritation and it feels uncomfortable.

[0046] (2) Evaluation of the removal effect on pore dirt when wiped off and used Twenty women aged 25 to 55 were used as panelists, and 1 g of the skin cosmetic was impregnated into cotton, and the removal effect on pore dirt when wiping the face was evaluated according to the following criteria. 2 points: When the blackening of the pores is less noticeable and the removal effect on pore dirt is felt to be very high. 1 point: When the blackening of pores is slightly less noticeable and the removal effect on pore dirt is felt to be high. 0 point: When the removal effect on pore dirt is not felt to be high.

[0047] (3) Evaluation of the persistence of the state where pores are not noticeable after wearing the mask Twenty female panelists aged from 25 to 55 years old were used. The face was wiped with cotton soaked with 1 g of skin cosmetic, and after wearing the mask for 2 hours, the visibility of pores was evaluated according to the following criteria. 2 points: When it is felt that the visibility of pores has hardly changed compared to before wearing the mask. 1 point: When it is felt that the visibility of pores has not changed much compared to before wearing the mask. 0 point: When it is felt that pores have become more noticeable compared to before wearing the mask.

[0048] The total score of each panelist in the above evaluations (1) to (3) was judged according to the following criteria and shown in Tables 1 to 3 respectively. In addition, "◎" and "○" were judged as passing. ◎: 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

[0049]

Table 1

[0050]

Table 2

[0051]

Table 3

[0052] As shown in Table 1 and Table 2, all of the skin cosmetics of Examples 1 to 17 were excellent in the feeling of application, had an effect of removing pore dirt when wiped off and used, and maintained a state where pores were not noticeable even after wearing a mask.

[0053] On the other hand, in Comparative Examples 1 to 5, sufficient performance was not obtained. In Comparative Example 1, since it did not contain (A) 1,3 - propanediol and instead contained 1,3 - butanediol which is a similar compound, the feeling of application was insufficient and it could not maintain a state where pores were not noticeable after wearing a mask.

[0054] In Comparative Example 2, since it did not contain (B) 1,2 - pentanediol, the effect of removing pore dirt when wiped off and used was insufficient and it could not maintain a state where pores were not noticeable after wearing a mask.

[0055] In Comparative Example 3, since it did not contain (C) glycerin mono 2 - ethylhexyl ether, the effect of removing pore dirt when wiped off and used was insufficient.

[0056] In Comparative Example 4, since it did not contain (D) extract from citrus fruits and instead contained loquat leaf extract which is a similar product, it could not maintain a state where pores were not noticeable after wearing a mask.

[0057] In Comparative Example 5, although each of the components (A) to (D) was within the scope of the present invention, since it also contained phenoxyethanol, the feeling of application was insufficient.

[0058] Next, formulation examples (Formulation Examples 1 and 2) of the skin cosmetics of the present invention are shown. These skin cosmetics of the formulation examples were also excellent in the feeling of application, had an effect of removing pore dirt when wiped off and used, and maintained a state where pores were not noticeable even after wearing a mask.

[0059] [Formulation Example 1] Gel - like skin cosmetic (unit of numerical value is mass%) (A) 1,3 - propanediol: 10 (B) 1,2 - Pentanediol: 2 (C) Glycerin mono 2 - ethylhexyl ether: 0.2 (D) Grape seed extract: 0.001 (D) Grape fruit extract: 0.001 (E) Polysorbate 80: 0.4 (F) Nicotinamide: 5 Sodium hyaluronate: 0.01 1,3 - Butanediol: 4 Glycerin: 5 Diglycerin: 1 Carboxyvinyl polymer: 0.2 Alkyl - modified carboxyvinyl polymer: 0.2 Arginine: 0.2 Glutamic acid: 0.001 Serine: 0.001 Proline: 0.001 Alanine: 0.001 Fragrance: appropriate amount Water: balance

[0060] [Formulation Example 2] Emulsion - type skin cosmetic (unit of numerical value is mass%) (A) 1,3 - Propanediol: 8 (B) 1,2 - Pentanediol: 2 (C) Glycerin mono 2 - ethylhexyl ether: 0.3 (D) Sea buckthorn pericarp extract: 0.001 (D) Yuzu fruit extract: 0.001 (E) Polysorbate 80: 0.5 (F) Ascorbic acid 2 - glucoside: 2 Dipotassium glycyrrhizinate: 0.1 Sodium hyaluronate: 0.01 1,3 - Butanediol: 4 Glycerin: 5 Diglycerin: 1 Carboxyvinyl polymer: 0.1 Alkyl-modified carboxyvinyl polymer: 0.1 Arginine: 0.1 PEG-75 stearate: 0.5 Glyceryl stearate: 1 Behenyl alcohol: 1 Olive fruit oil: 6 Cetyl ethylhexanoate: 6 Tocopherol: 0.1 Glutamic acid: 0.001 Serine: 0.001 Proline: 0.001 Alanine: 0.001 Fragrance: appropriate amount Water: balance

Industrial Applicability

[0061] The present invention can provide a skin cosmetic that is excellent in the feel during application, has an effect of removing pore dirt when wiped off and used, and can maintain a state where pores are not noticeable even after wearing a mask.

Claims

1. (A) 1 to 20% by mass of 1,3-propanediol, (B) 0.5 to 4 mass% of 1,2-pentanediol, (C) 0.01 to 0.5% by mass of glycerin mono 2-ethylhexyl ether, and (D) 0.0001 to 0.1% by mass of an extract from a citrus fruit in terms of solid content and a mass ratio ((C) / (D)) of the content of (C) glycerin mono 2-ethylhexyl ether to the solid content of (D) an extract from a citrus fruit is 30 or more and 1,000 or less.

2. 2. The skin cosmetic according to claim 1, further comprising 0.05 to 1.6 mass % of (E) a polyoxyethylene sorbitan fatty acid ester.

3. 3. The skin cosmetic according to claim 1 or 2, comprising (F) 0.1 to 10% by mass of one or more water-soluble components selected from the group consisting of ascorbic acid 2-glucoside, tranexamic acid and nicotinamide.

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