JP2017145207A - Aerosol-type cosmetics for scalp - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an aerosol-type cosmetic for scalp, which is prevented from dripping, applied by hand without slimness, and gives a sense of smoothness to the scalp.SOLUTION: According to the present invention, an aerosol-type cosmetic for scalp consists of a stock solution containing the following components (A) and (B), and component (C): carbon dioxide gas, such that the content of component (A) is 0.06% by mass or more and 4% by mass or less with respect to the total amount of the aerosol type cosmetic for scalp: (A) polyether-modified silicone having at least an ethylene oxide chain and a HLB value of 3 or more and 12 or less; and (B) water.SELECTED DRAWING: None

Description

  The present invention relates to an aerosol type cosmetic for scalp.

  Carbon dioxide gas is known to have a blood circulation promoting effect, and aerosol-type scalp cosmetics using carbon dioxide as a propellant are widely used. However, such aerosol-type scalp cosmetics have a problem that dripping easily occurs. In order to solve this problem, various compositions in which the viscosity of the stock solution is adjusted by adding a water-soluble thickener have been proposed. For example, Patent Document 1 discloses an aerosol composition comprising a stock solution containing hydrophobized hydroxypropylmethylcellulose and water and a propellant made of carbon dioxide.

  On the other hand, since organosiloxane has many excellent features, various forms of organopolysiloxane or cosmetics containing these are known. For example, Patent Document 2 discloses an aerosol composition in which dimethyl ether is blended at a certain ratio and pressurized with a compressed gas to prevent dripping, has a high cooling feeling, and has no stickiness. Discloses a stock solution containing a polyether-modified silicone. Patent Document 3 discloses an aerosol composition comprising a nonionic surfactant having a specific HLB, a low-viscosity oil, a stock solution containing ethanol and water, and carbon dioxide, and polyether-modified silicone is used as the oil. Illustrated.

JP 2013-170152 A JP 2005-126347 A JP 2003-300810 A

  However, when the hydrophobized hydroxypropylmethylcellulose is blended like the aerosol composition described in Patent Document 1, the discharged product is in the form of foam and the viscosity of the stock solution is high. There is a problem that it cannot be applied simply to the scalp that is being applied, and there is also a problem that it becomes slippery when applied by hand after application.

  On the other hand, the aerosol composition described in Patent Document 2 suppresses dripping at a specific ratio of dimethyl ether and compressed gas. When dimethyl ether is changed to carbon dioxide, a sufficient dripping suppressing effect cannot be obtained. It was. Furthermore, there is no description about the relationship between polyether-modified silicone and suppression of dripping, and the effect is not sufficient.

  In addition, the aerosol composition described in Patent Document 3 also has an insufficient effect on preventing dripping and still has room for improvement in terms of wetness when applied by hand after application.

  Therefore, the present invention relates to an aerosol-type cosmetic for scalp that suppresses dripping, does not become slippery when applied by hand after application to the scalp, and gives a smooth feeling to the scalp after application.

  In the aerosol-type scalp cosmetic using carbon dioxide gas as a propellant, the present inventors have included a specific amount of a specific polyether-modified silicone in the stock solution, thereby changing the viscosity of the stock solution. It has been found that the sustainability of fine bubbles generated by the vaporization of carbon dioxide is improved. As a result, it was found that dripping was suppressed despite the low viscosity of the stock solution, and that there was no sliminess when applied by hand, and a smooth feeling of the scalp after application was obtained.

The present invention comprises a stock solution containing the following components (A) and (B), and component (C) carbon dioxide gas, and the content of component (A) is 0.06% by mass based on the total amount of aerosol-type cosmetics for scalp. The present invention provides an aerosol-type cosmetic for scalp that is 4% by mass or less.
(A) A polyether-modified silicone having at least an ethylene oxide chain and having an HLB of 3 to 12
(B) Water

  The aerosol-type cosmetics for scalp of the present invention can prevent dripping when applied to the scalp by maintaining very fine bubbles generated in the discharge, and can be applied to the scalp by hand. It is smooth and can give a smooth feeling to the scalp after application. As used herein, “foam” refers to “foam” that forms a firm, bulky foam that is discharged with an aerosol foam-type hair conditioner or aerosol foam-type hair dye. In contrast, it refers to fine “bubbles” generated by the evaporation of carbon dioxide in a low-viscosity discharge liquid.

[Component (A): Polyether-modified silicone having at least ethylene oxide chain and HLB of 3 to 12]
Component (A) is a polyether-modified silicone having an HLB of 3 or more and 12 or less. The polyether-modified silicone of component (A) has at least an ethylene oxide chain from the viewpoint of improving foam persistence and suppressing dripping, and being non-lubricated when applied by hand after application to the scalp. For example, the alkylene oxide chain includes only an ethylene oxide chain, and the alkylene oxide chain includes an ethylene oxide chain and a propylene oxide chain. Among these, the alkylene oxide chain includes only an ethylene oxide chain. Is more preferable. On the other hand, for example, in a polyether-modified silicone in which an alkylene oxide chain is composed only of a propylene oxide chain, the durability of the foam and the smoothness of the scalp after application are inferior.

  Further, the HLB of the polyether-modified silicone of component (A) is 3 or more, preferably 4.0 or more, more preferably 4.5 or more, from the viewpoint of sufficient foam persistence. From the viewpoint of imparting a smooth feeling and sufficient foam sustainability, it is 12 or less, preferably 11.5 or less, more preferably 11 or less, still more preferably 10 or less, and still more preferably 9 or less. The HLB in the present invention is calculated by the Griffin equation (J, Soc, Cosmet, Chem., 1,311 (1949); 5,249 (1953)).

  Examples of the component (A) include PEG / PPG-20 / 22 butyl ether dimethicone, PEG / PPG-30 / 10 dimethicone, PEG / PPG-20 / 15 dimethicone, PEG / PPG-20 / 20 dimethicone, and PEG / PPG-19. / 19 dimethicone, PEG-9 methyl ether dimethicone, PEG-32 dimethyl ether dimethicone, lauryl PEG-9 polydimethylsiloxyethyl dimethicone, polysilicone-13, PEG-3 dimethicone, PEG-9 dimethicone, PEG-10 dimethicone, PEG-12 Examples include dimethicone. In addition, as a commercially available product of polyether-modified silicone that satisfies the condition as the component (A), KF-6012, KF-6013, KF-6015, KF-6016, KF-6017, KF-6017P, KF-6004, KF-6028, KF-6028P, KF-6038 (Shin-Etsu Chemical Co., Ltd.), SH3749, SH3772M, SH3773M, SH3775M, SS-2910, FZ-2222, FZ-2231, BY11-030, BY25-339 Cosmetic Fluid (Above, manufactured by Toray Dow Corning), SF1188A (above, manufactured by Momentive Performance Materials), and the like.

  In addition, the number of moles of ethylene oxide added in the polyether-modified silicone of component (A) improves the sustainability of the foam and suppresses dripping, and the viewpoint that it does not become slippery when applied by hand after application to the scalp. Therefore, it is preferably 3 or more, more preferably 5 or more, still more preferably 10 or more, and is preferably 35 or less, more preferably 20 or less, still more preferably 15 or less.

  In addition, examples of the modification method of the polyether-modified silicone of component (A) include a pendant type (side chain modified type), a linear copolymer type, and the like, but when applied by hand after application to the scalp From the viewpoint of imparting a smooth feeling to the scalp after application, a pendant type (side chain modified type) is preferred.

  The polyether-modified silicone of component (A) can be used alone or in combination of two or more. The polyether-modified silicone of component (A) in the undiluted solution improves the persistence of the foam and suppresses dripping, and does not become slippery when applied by hand after application to the scalp. From the viewpoint of imparting a smooth feeling to the skin, it is 0.06% by mass or more, preferably 0.07% by mass or more, more preferably 0.08% by mass or more, and 4% by mass or less, preferably 3% by mass or less. More preferably, it is 2% by mass or less, and further preferably 1% by mass or less.

[Component (B): Water]
The water content of component (B) in the stock solution is the remaining amount excluding component (A) and optional components.

[Component (C): Carbon dioxide]
The content of the carbon dioxide gas of the component (C) in the aerosol-type scalp cosmetics of the present invention is preferably 0.1% by mass or more from the viewpoint of improving the sustainability of foam, improving stability, and preventing dripping. More preferably, it is 0.5 mass% or more, More preferably, it is 1.0 mass% or more, Preferably it is 5 mass% or less, More preferably, it is 4 mass% or less, More preferably, it is 3 mass% or less.

  The propellant used in the aerosol-type scalp cosmetic of the present invention is preferably only the component (C) in order to more effectively exert the blood circulation promoting effect by the carbon dioxide gas of the component (C).

  The mass ratio (C) / (A) of the component (C) to the component (A) in the aerosol-type scalp cosmetics of the present invention does not become slippery when applied by hand after application to the scalp. From the viewpoint of giving a smooth feeling to the scalp, it is preferably 1.5 or more, more preferably 2 or more, further preferably 3 or more, more preferably 4 or more, and also improves the persistence of foam and suppresses dripping. In addition, from the viewpoint of imparting a smooth feeling to the scalp after application, it is preferably 40 or less, more preferably 35 or less, more preferably 32 or less. More preferably, it is 30 or less.

[Component (D): Ethanol]
In the stock solution, it is preferable to further contain ethanol as component (D) from the viewpoint of improving the persistence of the foam and giving the scalp a smooth feeling after application. The ethanol content of component (D) in the stock solution is preferably not less than 0.1% by mass, more preferably from the viewpoint of giving a smooth feeling to the scalp after application, without being slippery when applied by hand after application to the scalp. Is 5% by mass or more, more preferably 10% by mass or more, more preferably 20% by mass or more, and preferably 70% by mass or less, more preferably from the viewpoint of improving the persistence of foam and suppressing dripping. Is 65% by mass or less, more preferably 60% by mass or less.

  The ratio (D) / (A) of the component (D) to the component (A) in the stock solution is not moistened when applied by hand after application to the scalp, and gives a smooth feel to the scalp after application. Therefore, preferably 10 or more, more preferably 20 or more, more preferably 30 or more, from the viewpoint of improving the persistence of foam and suppressing dripping, and from the viewpoint of imparting a smooth feeling to the scalp after application, Preferably it is 600 or less, More preferably, it is 570 or less, More preferably, it is 550 or less.

  In addition, the mass ratio (D) / (B) of component (D) to component (B) in the stock solution does not slip when applied by hand after application to the scalp, giving a smooth feel to the scalp after application. From the viewpoint of, preferably 0.02 or more, more preferably 0.05 or more, still more preferably 0.09 or more, and from the viewpoint of improving the persistence of foam and suppressing dripping, preferably 2.5 or less, more preferably 2.2 or less More preferably, it is 2.0 or less.

[Ingredient (E): Hair-growth ingredient]
The stock solution preferably further contains a hair-growth component as component (E). Examples of the hair growth component include a blood circulation promoter, a hair follicle activator, and an anti-androgen agent.

  Blood circulation promoters include nicotinamide, acetylcholine, assembly extract, carrot extract, ginkgo biloba extract, carpronium chloride, diphenhydramine hydrochloride, γ-oryzanol, cercretin, vitamin E and its derivatives, camphor, chili tincture, ginger tincture, Dutch mustard , Cantalis tincture, salamander extract, peppermint oil, horseradish radish extract, minoxidil and its derivatives, cromakalim, diazoxide and its derivatives, nicorandil, pinacidil, phthalides, quina extract, spruce extract and the like.

  Examples of hair follicle activators include trans-3,4'-dimethyl-3-hydroxyflavanone, N-acetyl-L-methionine, Tamatsuki kurafuji, cephalanthin, kudin extract, adenosine triphosphate disodium, potassium aspartate, photosensitive dye 301, pentadecane glyceride, hinokitiol, chinchetsu carrot, flavanonol and its derivatives, hypericum extract, maikai flower extract, coleus extract, grape extract, biotin, mononitroguaiacol sodium, jaundice extract, yeast extract, garlic component, tiso extract, placenta Extract, button pi extract, royal jelly and the like.

  Anti-androgenic agents include cyproterone acetate, 11-α-hydroxyprogesterone, flutamide, 3-deoxyadenosine, chlormadinone acetate, ethinyl estradiol, spironolactone, epitesterone, glycyrrhizic acid and its derivatives, glycyrrhetinic acid and its derivatives, clove extract , Aloe extract, salamander extract, quacharate extract and the like.

  Component (E) may be used alone or in combination of two or more. The content of the component (E) in the aerosol-type scalp cosmetic of the present invention is preferably 0.01% by mass or more, more preferably 0.05% by mass or more, further preferably 0.07% by mass or more, and preferably 7%. It is at most 5% by mass, more preferably at most 5% by mass, even more preferably at most 3% by mass.

(Water-soluble thickener)
The aerosol-type cosmetic for scalp of the present invention preferably does not contain a water-soluble thickener from the viewpoints of no sliminess when applied by hand, smoothness of the scalp after application, and the like. Here, “not containing” includes not substantially containing. Note that “substantially” means that the component (A) or an arbitrary component is not intended to be excluded unless it is inevitably contained. Even when a small amount of a water-soluble thickener is contained in order to further suppress dripping, the content of the water-soluble thickener in the stock solution is preferably 0.05% by mass or less, more preferably 0.01% by mass or less. 0.005 mass% or less is more preferable. In the present invention, the water-soluble thickener corresponding to the polyether-modified silicone is not included in the water-soluble thickener in this column.

  In addition to the above components, the aerosol composition for scalp of the present invention can contain various additive components used in normal cosmetics depending on the purpose. For example, surfactants; bactericides such as triclosan and trichlorocarbanilide; anti-dandruff agents such as zinc pyrithione and octopirox; humectants such as eucalyptus extract and glycerin; preservatives such as methylparaben and butylparaben; ethylenediaminetetraacetic acid or Chelating agents such as salts thereof, hydroxyethanediphosphonic acid or salts thereof; pH adjusting agents such as sodium hydroxide and potassium hydroxide; salts such as sodium chloride; other pearlizing agents, fragrances, dyes, UV absorbers, antioxidants An agent or the like can be contained.

  In order to produce the aerosol composition for scalp of the present invention, a component other than the carbon dioxide gas of component (C) is mixed to prepare a stock solution and put into a pressure vessel for aerosol, and a method of sealing high-pressure carbon dioxide gas therein, pressure resistance Put a component that generates carbon dioxide gas containing carbonate such as sodium bicarbonate in a container, add a suitable pH adjuster to this to generate carbon dioxide gas, and immediately seal it, dry ice pellets in the container Although a method of putting and sealing can be adopted, a method of enclosing high-pressure carbon dioxide gas is preferable.

A part of carbon dioxide is dissolved and blended in the stock solution, and a part of the carbon dioxide exists as a gas in the container. In the present invention, it is important that carbon dioxide gas is dissolved and blended in the stock solution from the standpoint of the refreshing feeling and the medicinal efficacy of the blended medicinal ingredients, and carbon dioxide gas in the inner solution injected into the scalp. The concentration is preferably 60 ppm or more. The amount of carbon dioxide can be adjusted by adjusting the amount of carbon dioxide injected (pressed). Generally, the pressure in the container should be 1.2-10 kg / cm ² (gauge pressure) at a temperature of 35 ° C. It is preferable that the pressure be 4.5 to 10 kg / cm ² (gauge pressure).

Examples 1-9, Comparative Examples 1-8
An undiluted solution was prepared according to the formulation shown in Tables 1 and 2 and filled into a pressure-resistant container for aerosol together with carbon dioxide gas to obtain an aerosol-type cosmetic for scalp.
For these aerosol-type scalp cosmetics, the foam duration (holding of foam) is measured according to the following method, the difficulty of dripping after discharging to the scalp, the smoothness of the scalp after application, and familiarizing with the hand. Sensory evaluation was performed on the wetness. The results are also shown in Tables 1 and 2.

(Bubble duration / Bubble holding)
1 g of each composition was discharged onto the skin in a laboratory atmosphere, and the state of bubbles in the composition was visually observed, and the time from immediately after discharge until the bubbles in the composition disappeared was measured.

(The difficulty of dripping)
Sensory evaluation was conducted on the resistance to dripping after 0.2 g of each composition was discharged onto the scalp in a laboratory atmosphere. The evaluation was performed by allowing eight panelists to select one of “difficult to drip”, “difficult to drip slightly”, and “drip drip”. Show the number of panelists who answered “It is difficult to spill” / “Slightly difficult to spill” / “Spill”.

(Feeling of the scalp after drying)
1 g of each composition discharged from the pressure vessel was applied to the scalp, and after 3 minutes passed, it was subjected to a sensory evaluation on the smoothness of the scalp. The evaluation was performed by allowing the eight panelists to select one of “Smooth”, “Neither”, or “Smooth”. Show the number of panelists who answered “Smooth” / “I can't say” / “I have stickiness” in order.

(No slimy hands when applied)
1 g of each composition discharged from the pressure vessel was applied to the scalp and subjected to a sensory evaluation on the wetness of the hand when being blended. The evaluation was performed by allowing eight panelists to selectively select “Non-Smooth”, “Neither”, or “Smooth”. Show the number of panelists who answered "I can't say anything" / "I can't say anything" / "I'm slim".

Claims (6)

Consists of a stock solution containing the following components (A) and (B), and component (C) carbon dioxide, and the content of component (A) is 0.06% by mass to 4% by mass based on the total amount of aerosol-type cosmetics for scalp The following is an aerosol type cosmetic for scalp.
(A) A polyether-modified silicone having at least an ethylene oxide chain and having an HLB of 3 to 12
(B) Water   The scalp according to claim 1, wherein the stock solution further contains ethanol as component (D), and the content of component (D) is 0.1% by mass or more and 70% by mass or less based on the total amount of aerosol-type cosmetics for scalp. Aerosol-type cosmetics.   The aerosol-type cosmetic for scalp according to claim 2, wherein the mass ratio (D) / (B) of the component (D) to the component (B) is 0.02 or more and 2.5 or less.   The aerosol type cosmetic for scalp according to any one of claims 1 to 3, wherein the mass ratio (C) / (A) of the component (C) to the component (A) is 1.5 or more and 40 or less.   The aerosol type cosmetic for scalp according to any one of claims 1 to 4, wherein the propellant is only the component (C).   The aerosol-type cosmetic for scalp according to any one of claims 1 to 5, wherein the stock solution further contains a hair-restoring component as component (E).