JP2023140510A - Aerosol cosmetics for lips - Google Patents

Abstract

To provide an aerosol cosmetic for the lips that reduces bitterness when ingested without reducing preservative properties, and improves redness and dryness of the lips.SOLUTION: Provided is an aerosol cosmetic for the lips containing a stock solution containing the following ingredients (A), (B), (C) and (D): (A) two or more types of dihydric alcohols with a molecular weight of less than 115, totaling 3 to 20 mass%; (B) a surfactant; (C) a water-soluble thickener; and (D) water, and (E) a carbon dioxide gas.SELECTED DRAWING: None

Description

The present invention relates to an aerosol cosmetic for lips.

Compared to the skin, the lips have no sebum film, have a thin stratum corneum, and are prone to dryness. For this reason, the most common concerns regarding lips are dryness and peeling, followed by concerns about color and shape, which increase particularly with age.
On the other hand, skin problems such as dark circles and dullness under the eyes are thought to be caused by decreased blood flow, and cosmetics that utilize the effect of carbon dioxide gas are being considered to improve these problems.
For example, Patent Document 1 states that an aerosol cosmetic containing dimethylpolysiloxane, polyethylene glycol, a water-soluble thickener, a nonionic surfactant, and carbon dioxide gas is capable of causing a sufficient amount of carbon dioxide gas to act on the skin. It is described that the skin after application is not sticky and has an excellent feeling of use. Furthermore, in Patent Document 2, an aerosol cosmetic containing two specific types of surfactants, an acrylic acid polymer, a polyol, and carbon dioxide gas generates many small bubbles, and the carbon dioxide gas causes skin irritation. It is described that the transdermal absorption of is promoted, the skin does not feel sticky after application, and it has an excellent feeling of use.

JP 2020-2126 Publication JP 2016-17052 Publication

However, when conventional aerosol cosmetics containing carbon dioxide gas are applied to the lips in order to improve lip problems, there is a problem in that they taste bitter when put into the mouth.

The present inventor discovered that among the components contained in aerosol cosmetics, a specific polyol used for antiseptic properties and usability causes bitterness. Until now, the taste of polyols was unknown. Among polyols, by using a combination of two or more specific dihydric alcohols, it is possible to reduce bitterness when put into the mouth without reducing antiseptic properties, and reduce redness and dryness of the lips. It has been found that an aerosol cosmetic for lips that improves the feel of the lips can be obtained.

The present invention comprises the following components (A), (B), (C) and (D):
(A) Two or more dihydric alcohols with a molecular weight of less than 115, totaling 3 to 20% by mass,
(B) surfactant,
(C) water-soluble thickener,
The present invention relates to an aerosol cosmetic for lips containing (D) a stock solution containing water and (E) carbon dioxide gas.

The lip aerosol cosmetic of the present invention has antiseptic properties, reduces bitterness when put into the mouth, is less likely to cause irritation in the mouth, and can improve the redness and dryness of the lips.

Component (A) used in the present invention is a dihydric alcohol with a molecular weight of less than 115.
Component (A) is one used in ordinary cosmetics, such as 1,2-propanediol (molecular weight 76.09), 1,3-propanediol (molecular weight 76.09), and 1,3-butylene. Examples include glycol (molecular weight 90.1), 1,2-pentanediol (molecular weight 104.15), methylpropanediol (molecular weight 90.12), isopentyldiol (molecular weight 104), and the like.
Among these, 1,2-propanediol, 1,3-propanediol, 1, 3-butylene glycol and 1,2-pentanediol are preferred.

Component (A) is used in combination of two or more. The content of each of the two or more types of components is preferably 10% by mass or less, and 1 to 9% by mass in the stock solution, from the viewpoint of reducing bitterness when ingested and improving antiseptic properties. is more preferable, and even more preferably 2 to 8% by mass.
In addition, the total content of component (A) is determined from the viewpoint of improving antiseptic properties, reducing bitterness and irritation at the mouth when ingested, and improving redness and dryness of the lips after application. The content is 3% by mass or more, preferably 3.5% by mass or more, more preferably 4% by mass or more, 20% by mass or less, preferably 18% by mass or less, and even more preferably 16% by mass or less. The total content of component (A) in the stock solution is 3 to 20% by mass, preferably 3.5 to 18% by mass, and more preferably 4 to 16% by mass.

The surfactant as component (B) used in the present invention is one used in ordinary cosmetics, and includes nonionic surfactants, anionic surfactants, amphoteric surfactants, and the like.
The surfactant of component (B) is preferably a nonionic surfactant, and more preferably has an HLB of 2 to 18.
Here, HLB (Hydrophilic-Lipophilic Balance) indicates the molecular weight of the hydrophilic group portion in the total molecular weight of the surfactant, and for nonionic surfactants, Griffin ( Griffin).
The HLB of a mixed surfactant composed of two or more types of nonionic surfactants is determined as follows. The HLB of the mixed surfactant is obtained by averaging the HLB values of each nonionic surfactant based on their blending ratios.

Mixed HLB=Σ(HLBx×Wx)/ΣWx
HLBx indicates the HLB value of nonionic surfactant X.
Wx represents the mass (g) of the nonionic surfactant X having the value of HLBx.

Examples of nonionic surfactants include polyglycerin fatty acid ester, polyethylene glycol fatty acid ester, sucrose fatty acid ester, polyoxyethylene fatty acid ester, polyoxyethylene sorbitan fatty acid ester, polyoxyethylene alkyl ether, and polyoxyethylene sorbitol fatty acid ester. , polyoxyethylene glycerin fatty acid ester, polyoxyethylene propylene glycol fatty acid ester, polyoxyethylene castor oil, polyoxyethylene hydrogenated castor oil, polyoxyethylene hydrogenated castor oil fatty acid ester, polyoxyethylene phytostanol ether, polyoxyethylene phytosteel Examples include rose ether, polyoxyethylene cholestanol ether, polyoxyethylene cholesteryl ether, polyoxyalkylene-modified organopolysiloxane, and polyoxyalkylene/alkyl co-modified organopolysiloxane.
Among these, polyamides are used to improve the redness of the lips by generating many fine bubbles, reduce the bitterness when they enter the mouth, and prevent liquid from dripping and bubbles from entering the mouth when applied. Oxyethylene hydrogenated castor oil and polyoxyethylene/methylpolysiloxane copolymer are preferred.

Ingredient (B) can be used alone or in combination of two or more, and the content is such that it improves the redness of the lips by generating many fine bubbles and reduces the bitterness when it enters the mouth. However, from the viewpoint of preventing liquid from dripping and preventing bubbles from entering the mouth during application, it is preferably 0.1% by mass or more in the stock solution, more preferably 0.2% by mass or more, and 0.5% by mass. The above is more preferable, preferably 3.5% by mass or less, more preferably 2.5% by mass or less, even more preferably 1.5% by mass or less. The content of component (B) in the stock solution is preferably 0.1 to 3.5% by mass, more preferably 0.2 to 2.5% by mass, and 0.5 to 1.5% by mass. % is more preferred.

The water-soluble thickener for component (C) may be one used in ordinary cosmetics, such as carrageenan, dextrin, methyl cellulose, ethyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose, polyvinyl alcohol, polyacrylic acid, Examples include polymethacrylic acid, carboxyvinyl polymer, (acrylic acid/alkyl acrylate (C10-30)) copolymer, xanthan gum, carboxymethyl chitin, chitosan, and the like.
Among these, acrylic acid-based polymers and xanthan gum are preferred from the viewpoints of reducing bitterness when ingested, sustaining ejected foam, and preventing dripping and foam from entering the mouth during application.
As the acrylic acid-based polymer, carboxyvinyl polymers and acrylic acid/alkyl acrylate copolymers are more preferred, and (acrylic acid/alkyl acrylate (C10-30)) copolymers are more preferred.
Here, the (acrylic acid/alkyl acrylate (C10-30)) copolymer is a copolymer of C10-30 alkyl acrylic acid and acrylic acid, methacrylic acid, or lower alkyl esters thereof, and is a copolymer of sucrose. It is cross-linked with allyl ether or allyl ether of pentaerythritol, and commercially available products such as Pemulen TR-1, Pemulen TR-2, Carbopol ETD2020, Carbopol 1342, Carbopol 1382 (all manufactured by Lubrizol Advanced Materials) are used. be able to.

In addition, acid-type water-soluble thickeners such as polyacrylic acid, carboxyvinyl polymer, (acrylic acid/alkyl acrylate (C10-30)) copolymer, and alkali metal hydroxides such as potassium hydroxide and sodium hydroxide is preferably used as a neutralizing agent and as a water-soluble or water-dispersible salt.

Component (C) can be used alone or in combination of two or more, and the content is determined to reduce the bitterness when it enters the mouth, maintain the discharged foam, prevent dripping when applied, and prevent the foam from leaving the mouth. From the viewpoint of making it difficult to enter the stock solution, it is preferably 0.1% by mass or more, more preferably 0.15% by mass or more, even more preferably 0.2% by mass or more, preferably 2% by mass or less, and 1% by mass or more. The content is more preferably 0.4% by mass or less, and even more preferably 0.8% by mass or less. The content of component (C) in the stock solution is preferably 0.1 to 2% by mass, more preferably 0.15 to 1.4% by mass, and 0.2 to 0.8% by mass. More preferred.

Component (D) water used in the present invention serves as a solvent for the stock solution and forms the remainder of the other components. The content of water in component (D) is preferably 60% by mass or more in the stock solution, more preferably 70% by mass or more, from the viewpoint of improving the redness of the lips and making the mouth area fresh after application. It is more preferably at least 96.5% by mass, more preferably at most 90% by mass, even more preferably at most 86% by mass. Further, the content of water as component (D) in the stock solution is preferably 60 to 96.5% by mass, more preferably 70 to 90% by mass, and even more preferably 74 to 86% by mass.

In addition, in the present invention, the mass ratio (A)/(D) of component (A) to component (D) has antiseptic properties, reduces bitterness when put into the mouth, and is less likely to cause irritation in the mouth. From the viewpoint of improving the redness and dryness of the lips, it is preferably 0.03 to 0.35, more preferably 0.04 to 0.3, and even more preferably 0.05 to 0.24.

The aerosol cosmetic for lips of the present invention further improves the dry feeling of the lips after application and provides a suitable adhesion feeling to the mouth area after application. can contain.
Here, "liquid" means having fluidity, and includes paste-like.
The oil agent of component (F) is one used in ordinary cosmetics, such as hydrocarbons such as paraffin, squalane, and squalene; triglycerides such as camellia oil, jojoba oil, olive oil, macadamia nut oil, avocado oil, and olive oil. Natural animal and vegetable oils mainly composed of; glycerin monostearate, glycerin distearate, glycerin monooleate, isopropyl palmitate, isopropyl stearate, butyl stearate, isopropyl myristate, diethyl phthalate, myristyl lactate, myristic acid. Cetyl, cetyl lactate, cetyl 2-ethylhexanoate, 2-ethylhexyl palmitate, 2-octyldodecyl myristate, 2-octyldodecyl oleate, glycerol triisostearate, mono-2 di-paramethoxycinnamate - Monoester oils such as glyceryl ethylhexanoate, isotridecyl isononanoate, glyceryl monomyristate monoisostearate, alkyl benzoate (alkyl group with 12 to 15 carbon atoms); diisopropyl adipate, diisobutyl adipate, neopentyl glycol dicaprate , tri(caprylic/capric) glyceryl, tricapric glycerin, di-2-ethylhexanoic acid neopentyl glycol, di(caprylic/capric) propanediol, 1-isostearoyl-3-myristoylglycerol, diisomalic acid Diester oils such as stearyl and di(cholesteryl octyldodecyl) N-lauroyl-L-glutamic acid; ether oils such as alkyl-1,3-dimethylbutyl ether, dicaprylyl ether, and dicaprylyl ether; silicone oils such as dimethylpolysiloxane; Examples include essential oils such as eucalyptus oil and peppermint oil.

The oil agent of component (F) includes those with a viscosity of 500 to 50,000 mPa・s at 25°C, from the viewpoint of improving the dry feeling of the lips after application and providing a suitable adhesion feeling to the lips after application. is preferred.
Here, the viscosity is measured by the viscosity measuring method of the foreign standard general test method, the second method, the rotational viscometer method, etc.

Component (F) can be used alone or in combination of two or more, and the content is determined from the viewpoint of providing a suitable adhesion feeling to the lips after application and improving the dry feeling of the lips after application. It is preferably 0.5% by mass or more in the stock solution, more preferably 1% by mass or more, even more preferably 1.5% by mass or more, preferably 20% by mass or less, more preferably 18% by mass or less, and 15% by mass or less. % or less is more preferable. Further, the content of component (F) in the stock solution is preferably 0.5 to 20% by mass, more preferably 1 to 18% by mass, and even more preferably 1.5 to 15% by mass.

The lip aerosol cosmetic of the present invention further contains (G) a dihydric alcohol with a molecular weight of 115 or more and 190 or less in the stock solution in order to improve preservative properties and improve the feeling of dryness on the lips after application. I can do it.
The dihydric alcohol of component (G) is one commonly used in cosmetics, such as dipropylene glycol (molecular weight 134.17), 1,2-hexanediol (molecular weight 118.17), 1,2- Examples include octanediol (molecular weight 146.13).

Component (G) can be used alone or in combination of two or more, and the content is preferably 3% by mass or less in the stock solution from the viewpoint of reducing bitterness when ingested. It is more preferably 2% by mass or less, and even more preferably not contained.

The lip aerosol cosmetic of the present invention may contain (H) parabens (paraoxybenzoic acid esters) in order to improve antiseptic properties. The content of component (H) in the stock solution is preferably 0.3% by mass or less, more preferably 0.1% by mass or less, from the viewpoint of improving antiseptic properties and reducing irritation at the mouth. Moreover, from the viewpoint of reducing irritation, it is preferable not to contain it.
Examples of parabens include methylparaben and ethylparaben.

In the lip aerosol cosmetic of the present invention, the stock solution further contains ingredients used in ordinary cosmetics, such as polyhydric alcohols other than the above, oily ingredients other than the above, preservatives, antioxidants, pigments, and pH adjustment. It can contain agents, fragrances, ultraviolet absorbers, humectants, blood circulation promoters, cooling agents, antiperspirants, bactericidal agents, whitening agents, anti-inflammatory agents, skin activators, and the like.

In the lip aerosol cosmetic of the present invention, a stock solution is prepared by mixing the components (A) to (D) and other components. The viscosity of the stock solution at 25° C. is preferably 1,500 to 12,000 mPa·s, preferably 2,000 to 9,000 mPa·s, and more preferably 2,500 to 7,500 mPa·s from the viewpoint of emulsion stability of the stock solution and foam dischargeability. .
Here, the viscosity is measured using a BM viscometer (manufactured by Toki Sangyo Co., Ltd.) using rotor No. 3.Measure at 12 rpm for 1 minute, and if the viscosity exceeds 10,000 mPa・s, rotor No. This is a value measured at 3.6 rpm and 1 minute.

The lip aerosol cosmetic of the present invention can be produced by a conventional method by filling a pressure-resistant container with the above-mentioned stock solution and (E) carbon dioxide gas. As for the form of the injection, it is preferable to use a foam type in which the liquid is discharged in the form of foam.
The mass ratio of the stock solution to carbon dioxide gas is preferably 94:6 to 99.5:0.5, more preferably 95:5 to 99:1, from the viewpoint of the solubility of carbon dioxide gas in the stock solution and foam generation. , 96.5:3.5 to 98.5:1.5 are more preferred.

The lip aerosol cosmetic of the present invention may contain, in addition to the component (E) carbon dioxide gas, a propellant used in ordinary aerosol cosmetics. Examples of the propellant include liquefied petroleum gas, compressed gas, and the like. When a propellant other than carbon dioxide is included, the content of carbon dioxide relative to the total amount of carbon dioxide and propellant is preferably 90% by mass or more, more preferably 95% by mass or more, and 98% by mass or more. is even more preferable.

The lip aerosol cosmetic of the present invention is used by applying it to the lips, and carbon dioxide gas is absorbed transdermally, resulting in a high blood circulation promoting effect, which can improve lip color (redness, dullness, etc.). , can improve the feeling of dryness. Suitable as a lip color improving agent.
Furthermore, after applying the aerosol cosmetic for lips of the present invention to the lips, by leaving it for a certain period of time, the liniment containing air bubbles forms a kind of coating film, which enhances the effect of promoting blood circulation. be able to.

Examples 1 to 10 and Comparative Examples 1 to 4
Aerosol cosmetics for lips having the compositions shown in Table 1 were produced and evaluated as follows. The results are also shown in Table 1.

(Production method)
Step 1: Components (C), (D) and the base component are mixed and homogenized at a temperature of 60-70°C.
Step 2: Add components (A), (B), (F), (G), (H), and other components to the liquid obtained in Step 1, and stir to homogenize.
Step 3: Cool the liquid obtained in Step 2 to 15-30°C.
Step 4: The liquid (undiluted solution) obtained in Step 3 was filled into a pressure-resistant container, sealed, and then filled with component (E) under pressure to obtain an aerosol cosmetic for lips.

(Evaluation method)
(1) Stock solution viscosity:
50 g of the stock solution obtained in step 3 was filled into a 50 mL glass container and measured using a BM viscometer (manufactured by Toki Sangyo Co., Ltd.) (rotor NO3, 12 rpm, 1 minute).

(2) 10 expert panelists applied each lip aerosol cosmetic to the upper and lower lips by discharging it to a diameter of 1 cm. The following criteria were used to evaluate bitterness and irritation upon application, improvement in lip redness and dryness of the lips before and after using the cosmetic once a day for two weeks. The results were shown as a total score of 10 participants.

(2-1) Lack of bitterness when you put it in your mouth:
The bitterness in the mouth upon application was evaluated using the following criteria.
4; No bitterness felt.
3; Almost no bitterness felt.
2; Slight bitterness is felt.
1; I feel bitterness.

(2-2) Difficulty feeling stimulation around the mouth (lips and surrounding areas):
Irritation at the mouth during application was evaluated using the following criteria.
4; No irritation felt around the mouth.
3: Almost no irritation felt around the mouth.
2; I feel a little irritation around my mouth.
1; I feel irritation around my mouth.

(2-3) Improvement of lip redness:
Changes in the redness of the lips before and after continuous use for two weeks were visually evaluated using the following criteria.
4; The redness of the lips increased.
3; The redness of the lips increased slightly.
2; There was almost no change in the redness of the lips.
1; There was no change in the redness of the lips or the redness was reduced.

(2-4) Improvement of dryness of lips:
Changes in the dryness of the lips before and after continuous use for two weeks were evaluated based on the patient's actual experience using the following criteria.
4; Dry feeling of lips improved.
3; The dryness of the lips was slightly improved.
2; There was almost no change in the dryness of the lips.
1; There was no change in the dryness of the lips, or the dryness became worse.

(3) Preservative properties:
The test was conducted in accordance with the preservation effect test method, category IB, listed in the 18th edition of the Japanese Pharmacopoeia.
The judgment is that if the number of bacteria decreases by 2.0 log or more compared to the number of inoculated bacteria 14 days after inoculation and does not increase after 28 days from the number of bacteria after 14 days, it is considered antiseptic (〇), and when it increases, it is considered antiseptic. It was marked as none (x).

*1: Emanone CH60K, manufactured by Kao Corporation: HLB14,
*2: SH3775M, manufactured by Toray Dow Corning: HLB5,
*3: PEMULEN TR-1, manufactured by Lubrizol Advanced Materials, Inc.
*4: Keldent, manufactured by DSP Gokyo Food & Chemical Co., Ltd.

Claims (8)

The following ingredients (A), (B), (C) and (D):
(A) Two or more dihydric alcohols with a molecular weight of less than 115, totaling 3 to 20% by mass,
(B) surfactant,
(C) water-soluble thickener,
(D) A stock solution containing water, and (E) an aerosol cosmetic for lips containing carbon dioxide gas. The aerosol cosmetic for lips according to claim 1, wherein the mass ratio (A)/(D) of component (A) to component (D) is 0.03 to 0.35. The aerosol cosmetic for lips according to claim 1 or 2, wherein the content of each of the two or more components of component (A) is 10% by mass or less in the stock solution. The aerosol cosmetic for lips according to any one of claims 1 to 3, wherein the stock solution further contains (F) an oil agent that is liquid at 25°C. The aerosol cosmetic for lips according to any one of claims 1 to 4, wherein the stock solution further contains (F) 0.5 to 20% by mass of an oil agent with a pressure of 500 to 50,000 mPa·s. The aerosol cosmetic for lips according to any one of claims 1 to 5, wherein the stock solution further contains (G) a dihydric alcohol having a molecular weight of 115 or more and 190 or less. The aerosol cosmetic for lips according to any one of claims 1 to 6, wherein the stock solution does not contain (H) parabens. The following ingredients (A), (B), (C) and (D):
(A) Two or more dihydric alcohols with a molecular weight of less than 115, totaling 3 to 20% by mass,
(B) surfactant,
(C) water-soluble thickener,
(D) A stock solution containing water, and (E) a lip color improving agent containing carbon dioxide gas.