Aerosol composition

Abstract

To provide an aerosol composition that is superior in storage stability and care efficacy and offers superior spray performance.SOLUTION: An aerosol composition contains the following components (A)-(C): (A) a cationic surfactant, (B) a higher alcohol, (C) an aerosol stock solution that contains a nonionic polymer with a cellulose skeleton, and (D) a propellant that contains carbon dioxide. The mass ratio of the component (C) to the total content of the component (A) and the component (B) [(C) / ((A)+(B))] is 0.038 or more and 0.80 or less.SELECTED DRAWING: None

Description

Technical Field

[0001] The present invention relates to an aerosol composition.

Background Art

[0002] Aerosol cosmetics can be used by discharging the cosmetic, which is an aerosol stock solution, in a foamy form, and thus have the advantage of being easily spread on the skin or hair. Care components according to desired performance and uses are formulated in the aerosol stock solution. For example, when the aerosol cosmetic is a hair cosmetic such as a rinse, a treatment agent, or a conditioning agent, a cationic surfactant is used for the purpose of imparting a conditioning effect, and a higher alcohol is formulated for the purpose of imparting a smooth feeling in use and a good finish. It is known that by formulating a cationic surfactant and a higher alcohol at a high concentration, the care feeling of the hair can be further improved.

[0003] As an aerosol cosmetic containing a care component, for example, Patent Document 1 discloses an aerosol foam dispenser containing a concentrated hair care composition containing oil, a high melting point aliphatic compound, a propellant, a fragrance, and water in predetermined amounts and satisfying predetermined requirements. And it is described that a concentrated and ultra-low viscosity composition can be delivered to the hair in the form of foam and sufficient administration is possible, while on the other hand, the problem that the high melting point aliphatic compound accumulates on the hair and the hair becomes heavy can be improved when used multiple times.

[0004] Patent Document 1 discloses only chemically inert hydrocarbons as aerosol propellants, but aerosol compositions using carbon dioxide as a propellant are also known. When carbon dioxide is used as an aerosol propellant, for example, creamy and elastic textured foam can be discharged as compared with hydrocarbon gases, liquefied petroleum gas (LPG), etc. On the other hand, it is known that when carbon dioxide is used as an aerosol propellant, the storage stability of the aerosol composition tends to decrease due to the coexistence of carbon dioxide.

[0005] As a technique for solving this problem, for example, Patent Document 2 discloses an aerosol composition containing a cationic surfactant containing a mono-long-chain alkyl type cationic surfactant and a linear saturated higher alcohol, wherein the content of the cationic surfactant and the molar ratio of the linear saturated higher alcohol to the mono-long-chain alkyl type cationic surfactant are within predetermined ranges, and an aerosol composition containing a propellant containing carbon dioxide. By using this composition, it is disclosed that while containing an aerosol stock solution with a high concentration of a cationic surfactant and a higher alcohol and a propellant containing carbon dioxide, the composition has excellent storage stability. Further, Patent Document 3 discloses an oral aerosol agent containing a stock solution containing a predetermined amount of hydroxyalkylcellulose and water, wherein the content of a specific thickener is not more than a predetermined value and the viscosity is within a predetermined range, and a propellant containing 80% by mass or more of carbon dioxide. It is disclosed that by using a propellant containing carbon dioxide, high storage stability can be ensured in a wide temperature range from low temperature to high temperature, and the foam retention of the sprayed foam can be enhanced.

Prior Art Documents

Patent Documents

[0006]

Patent Document 1

Patent Document 2

Patent Document 3

Summary of the Invention

Problems to be Solved by the Invention

[0007] In an aerosol composition using carbon dioxide as a propellant, it is important to have excellent storage stability and to easily exhibit a sense of care. In the aerosol composition disclosed in Patent Document 2, an aerosol stock solution containing care components such as a cationic surfactant and a higher alcohol at a high concentration and a propellant containing carbon dioxide are used. However, in the aerosol composition containing care components at a high concentration, the injection amount per injection operation tends to decrease as the number of injections increases. In the aerosol composition according to the prior art, there is room for improvement in terms of improving both the care feeling and the injectability. Further, in Patent Document 3, hydroxyalkyl cellulose is used as a thickener, but care components are not blended, and no consideration has been given at all to improving both the care feeling and the injectability. The present invention relates to providing an aerosol composition excellent in storage stability and care feeling and having good injectability.

Means for Solving the Problems

[0008] The present inventors have found that an aerosol composition containing an aerosol stock solution containing a cationic surfactant, a higher alcohol, and a specific nonionic polymer at a predetermined ratio and a propellant containing carbon dioxide can solve the above problems. That is, the present invention relates to the following components (A) to (C): (A) Cationic surfactant (B) Higher alcohol (C) Nonionic polymer having a cellulose skeleton An aerosol composition containing an aerosol stock solution containing the above components and (D) a propellant containing carbon dioxide, wherein the mass ratio [(C) / ((A)+(B))] of the content of the component (C) to the total content of the component (A) and the component (B) is 0.038 or more and 0.80 or less.

Effects of the Invention

[0009] According to the present invention, an aerosol composition excellent in storage stability and care feeling and having good injectability can be provided.

Modes for Carrying Out the Invention

[0010] [Aerosol Composition] The aerosol composition of the present invention (hereinafter also simply referred to as "the composition of the present invention") comprises the following components (A) to (C): (A) Cationic surfactant (B) Higher alcohol (C) Nonionic polymer having a cellulose backbone An aerosol composition containing an aerosol stock solution containing the above components and (D) a propellant containing carbon dioxide, wherein the mass ratio [(C) / ((A)+(B))] of the content of the component (C) to the total content of the component (A) and the component (B) is 0.038 or more and 0.80 or less. The aerosol composition of the present invention is excellent in storage stability and care feeling and has good sprayability. In this specification, "good care feeling" means that when the aerosol composition is a hair cosmetic composition, the care feeling of the hair, for example, the touch of the hair during rinsing is good. When the aerosol composition is a skin cosmetic composition, it means that the touch after application is good. Also, in this specification, "good sprayability" means that the spray amount of the aerosol per spray operation is large. These can be specifically evaluated by the methods described in the examples. In the present invention, "containing component X" or "comprising component X" also means "formed by blending component X".

[0011] Although the reason why the aerosol composition of the present invention exhibits the effects of the present invention due to the above configuration is not clear, it is presumed as follows. The aerosol stock solution used in the aerosol composition of the present invention contains a cationic surfactant (A) (hereinafter also simply referred to as "component (A)"), a higher alcohol (B) (hereinafter also simply referred to as "component (B)"), and a nonionic polymer (C) having a cellulose backbone (hereinafter also simply referred to as "component (C)"). The cationic surfactant (A) is used to impart a desired care feeling according to the application of the aerosol composition. Similarly, when the higher alcohol (B) is blended in the hair cosmetic composition, the care feeling of the hair can be improved. That is, both the component (A) and the component (B) act as care components. It is considered that the component (A) and the component (B) are emulsified and dispersed in the aerosol stock solution and can form an α-gel structure. The formation of the α-gel structure can be confirmed by X-ray diffraction (XRD). Specifically, in wide-angle X-ray diffraction, when at least one sharp diffraction peak appears in the vicinity of Bragg angle = 21 - 22°, it can be determined that the α-gel structure is formed. When the component (A) and the component (B) form a stable α-gel, it is considered that even when the propellant (D) containing carbon dioxide is used, the decrease in storage stability can be suppressed.

[0012] The nonionic polymer (C) having a cellulose backbone improves the care feeling and sprayability of the aerosol composition by having a cellulose backbone, and further improves the stability of the above α-gel, and is considered to have an effect of suppressing the separation of the aerosol composition even under the use of the propellant (D) containing carbon dioxide. And when the mass ratio [(C) / ((A)+(B))] in the aerosol stock solution is 0.038 or more, the care feeling and the effect of improving the storage stability due to the stabilization of the above α-gel become good, and when it is 0.80 or less, it is considered that the increase in the viscosity of the aerosol stock solution can be suppressed and good sprayability can be maintained.

[0013] The carbon dioxide used as the propellant (D) has higher foaming properties than liquefied petroleum gas (LPG), and higher solubility in water compared to other propellants such as nitrogen. Therefore, when carbon dioxide is used as the propellant, it is considered that fine and dense bubbles containing carbon dioxide gas can be discharged. Furthermore, since an α-gel composed of the cationic surfactant (A) and the higher alcohol (B), which are care components, aggregates at the gas-liquid interface of the discharged bubbles, when the discharged bubbles are brought into contact with the object, a high concentration of care components can be supplied to the object, and a good care feeling can be expressed.

[0014] Although the use of the aerosol composition of the present invention is not particularly limited, from the viewpoint of obtaining an effect of improving the care feeling by the cationic surfactant (A) and the higher alcohol (B), it is preferably a hair cosmetic composition. Examples of the hair cosmetic composition include hair cleaning agents such as shampoos, rinses, conditioning agents, treatment agents (including those not washed away), styling agents, hair dyes, hair growth agents, and the like. Among these, from the viewpoint of containing the cationic surfactant (A), the aerosol composition is preferably a rinse, a conditioning agent, a treatment agent, or a styling agent, and more preferably a rinse, a conditioning agent, or a treatment agent.

[0015] <Component (A): Cationic surfactant> The aerosol stock solution constituting the aerosol composition of the present invention contains a cationic surfactant as the component (A). The component (A) is used to impart a desired care feeling to the aerosol composition.

[0016] Examples of the component (A) include (i) alkyltrimethylammonium salts, (ii) alkoxyalkyltrimethylammonium salts, (iii) dialkyldimethylammonium salts, (iv) alkylamidalkyltrimethylammonium salts, (v) alkyldimethylamines and their salts, (vi) alkoxyalkyldimethylamines and their salts, and (vii) alkylamidalkyldimethylamines and their salts.

[0017] Examples of the (i) alkyltrimethylammonium salt preferably include an alkyltrimethylammonium salt having an alkyl group having 12 or more and 22 or less carbon atoms, more preferably 16 or more and 20 or less carbon atoms. Specifically, cetyltrimethylammonium chloride (cetrimonium chloride), stearyltrimethylammonium chloride (steartrimonium chloride), behenyltrimethylammonium chloride, and the like can be mentioned. (ii) As the alkoxyalkyltrimethylammonium salt, preferably an alkoxyalkyltrimethylammonium salt having an alkoxy group with 12 to 22 carbon atoms, more preferably 16 to 20 carbon atoms is mentioned. Specifically, stearoxypropyltrimethylammonium chloride, stearoxyethyltrimethylammonium chloride, stearoxyhydroxypropyltrimethylammonium chloride, etc. are mentioned. (iii) As the dialkyldimethylammonium salt, preferably a dialkyldimethylammonium salt having an alkyl group with 12 to 22 carbon atoms, more preferably 16 to 20 carbon atoms is mentioned. Specifically, distearyldimethylammonium chloride, etc. are mentioned. (iv) As the alkylamidopropyltrimethylammonium salt, preferably an alkylamidopropyltrimethylammonium salt having an alkyl group with 11 to 21 carbon atoms, more preferably 13 to 19 carbon atoms is mentioned. Specifically, palmitamidopropyltrimethylammonium chloride [palmitamidopropyltrimonium chloride], etc. are mentioned.

[0018] (v) Alkyl dimethylamine, (vi) alkoxyalkyl dimethylamine, and (vii) alkylamidopropyl dimethylamine react with an acid to form a tertiary amine salt and become a cationic surfactant. (v) The alkyl group in the alkyl dimethylamine and its salt, and (vi) the alkoxy group in the alkoxyalkyl dimethylamine and its salt are preferably 12 to 22 carbon atoms, more preferably 16 to 20 carbon atoms. (vii) The alkyl group of the alkylamide moiety in the alkylamidopropyl dimethylamine and its salt is preferably an alkyl group with 11 to 21 carbon atoms, more preferably 15 to 19 carbon atoms.

[0019] (v) to (vii) amines may be reacted with an acid in advance to form a salt and incorporated into the aerosol stock solution, or may be incorporated into the aerosol stock solution as an amine as it is, and further an acid may be incorporated into the aerosol stock solution to form a salt in the aerosol stock solution. Therefore, here, the above amines and their salts are defined as cationic surfactants. Further, the content or blending amount is converted in terms of the mass of the above amine. Examples of the salts of the amines of (v) to (vii) include salts with organic acids or inorganic acids. Examples of the organic acids include monocarboxylic acids such as acetic acid and propionic acid; dicarboxylic acids such as malonic acid, succinic acid, glutaric acid, adipic acid, maleic acid, fumaric acid, and phthalic acid; polycarboxylic acids such as polyglutamic acid; hydroxycarboxylic acids such as glycolic acid, lactic acid, hydroxyacrylic acid, glyceric acid, malic acid, tartaric acid, and citric acid; acidic amino acids such as glutamic acid and aspartic acid. Examples of the inorganic acids include hydrochloric acid, sulfuric acid, phosphoric acid, etc. Among these, organic acids are preferred, and one or more selected from the group consisting of dicarboxylic acids, hydroxycarboxylic acids, and acidic amino acids are more preferred. As the dicarboxylic acid, one or more selected from the group consisting of maleic acid and succinic acid are more preferred. As the hydroxycarboxylic acid, one or more selected from the group consisting of glycolic acid, lactic acid, and malic acid are more preferred. As the acidic amino acid, glutamic acid is more preferred.

[0020] Examples of the alkyldimethylamine and its salt of (v) include N,N-dimethylbehenylamine, N,N-dimethylstearylamine, and their organic acid salts.

[0021] Examples of the alkoxyalkyldimethylamine and its salt of (vi) include N,N-dimethyl-3-hexadecyloxypropylamine, N,N-dimethyl-3-octadecyloxypropylamine [stearoxypropyl dimethylamine], and their organic acid salts.

[0022] (vii) Examples of the alkylamide alkyldimethylamine and its salts include N-[3-(dimethylamino)propyl]docosanamide, N-[3-(dimethylamino)propyl]stearamide, and organic acid salts thereof.

[0023] Component (A) can be used singly or in combination of two or more. Among the above, from the viewpoints of storage stability, care feeling, and improvement of sprayability of the aerosol composition, component (A) is preferably at least one selected from the group consisting of alkyldimethylamine, alkoxyalkyldimethylamine, alkylamide alkyldimethylamine, and salts thereof, more preferably at least one selected from the group consisting of alkoxyalkyldimethylamine, alkylamide alkyldimethylamine, and salts thereof, and still more preferably alkoxyalkyldimethylamine or its salt.

[0024] <Component (B): Higher alcohol> The aerosol stock solution constituting the aerosol composition of the present invention contains a higher alcohol as component (B). Component (B) is used to impart a desired care feeling to the aerosol composition.

[0025] The number of carbon atoms of the higher alcohol as component (B) is preferably 12 or more and 22 or less, more preferably 14 or more and 20 or less. Also, from the viewpoint of improving the storage stability of the aerosol composition, component (B) is preferably a linear saturated higher alcohol having 12 or more and 22 or less carbon atoms, more preferably 14 or more and 20 or less carbon atoms.

[0026] Examples of component (B) include lauryl alcohol, myristyl alcohol, cetyl alcohol, stearyl alcohol, behenyl alcohol, etc., and one or more of these can be used. Among these, from the viewpoints of storage stability of the aerosol composition and improvement of the care feeling, preferably one or more selected from the group consisting of lauryl alcohol, cetyl alcohol, and stearyl alcohol, more preferably one or more selected from the group consisting of cetyl alcohol and stearyl alcohol, and still more preferably stearyl alcohol.

[0027] <Component (C): Nonionic polymer having a cellulose skeleton> The aerosol stock solution constituting the aerosol composition of the present invention contains a nonionic polymer having a cellulose skeleton as component (C). Component (C) contributes to the improvement of the storage stability, care feeling, and injectability of the aerosol composition.

[0028] Examples of component (C) include cellulose, alkyl cellulose, hydroxyalkyl cellulose, hydrophobized (C16-18) hydroxyalkyl cellulose, etc., and one or more of these can be used. Specific examples of component (C) include one or more selected from the group consisting of cellulose, methyl cellulose, ethyl cellulose, hypromellose, hydroxyethyl cellulose, hydroxypropyl cellulose, and hydrophobized (C16-18) hydroxypropyl methyl cellulose. Among these, from the viewpoints of storage stability of the aerosol composition, care feeling, and improvement of injectability, preferably hydroxyalkyl cellulose, and more preferably hydroxyethyl cellulose.

[0029] The weight-average molecular weight (Mw) of component (C) is preferably 500,000 or more, more preferably 800,000 or more, still more preferably 1,000,000 or more, from the viewpoints of further improving the storage stability and injectability of the aerosol composition and improving the foam quality. Also, from the viewpoints of improving the storage stability and injectability of the aerosol composition, it is preferably 5,000,000 or less, more preferably 3,000,000 or less, still more preferably 2,000,000 or less. And the weight-average molecular weight of component (C) is preferably 500,000 or more and 5,000,000 or less, more preferably 800,000 or more and 3,000,000 or less, still more preferably 1,000,000 or more and 2,000,000 or less.

[0030] <Component (E): Sugar alcohol> The aerosol stock solution constituting the aerosol composition of the present invention can further contain a sugar alcohol as component (E) from the viewpoint of further improving the storage stability and injectability of the aerosol composition. Examples of component (E) include glycerin, sorbitol, mannitol, maltitol, lactose, maltotriitol, xylitol, etc., and one or more of these can be used. Among these, from the viewpoint of further improving the storage stability and injectability of the aerosol composition, component (E) is preferably one or more selected from the group consisting of glycerin, sorbitol, mannitol, and maltitol, more preferably one or two selected from the group consisting of sorbitol and glycerin, and still more preferably glycerin.

[0031] <Component (C'): Nonionic polymer other than component (C)> The aerosol stock solution constituting the aerosol composition of the present invention can further contain a nonionic polymer other than component (C) as component (C') from the viewpoints of further improving the storage stability and injectability of the aerosol composition and improving the foam quality.

[0032] The weight average molecular weight (Mw) of the component (C’) is preferably 10,000 or more, more preferably 50,000 or more, still more preferably 100,000 or more, even more preferably 200,000 or more, and even more preferably 500,000 or more, from the viewpoints of further improving the storage stability and injectability of the aerosol composition and improving the foam quality. Also, from the viewpoints of improving the storage stability and injectability of the aerosol composition, it is preferably 5,000,000 or less, more preferably 4,000,000 or less, and still more preferably 3,500,000 or less. And the weight average molecular weight of the component (C’) is preferably 10,000 or more and 5,000,000 or less, more preferably 50,000 or more and 5,000,000 or less, still more preferably 100,000 or more and 4,000,000 or less, even more preferably 200,000 or more and 4,000,000 or less, and even more preferably 500,000 or more and 3,500,000 or less. The weight average molecular weights of the component (C) and the component (C’) can be measured, for example, by gel permeation chromatography (GPC) under the following conditions. Mobile phase: 50 mM LiBr, 1% CH3COOH / ethanol: water = 3:7 (w / w) Column: TSK gel α-M (manufactured by Tosoh Corporation) (two in series) Standard substance: polyethylene glycol

[0033] Examples of the component (C’) include water-soluble polysaccharides such as starch, guar gum, tara gum, locust bean gum, and glucomannan; highly polymerized polyalkylene glycols such as highly polymerized polyethylene glycol and highly polymerized polyethylene glycol - polypropylene glycol copolymer; polyvinyl alcohol, etc. One or more of these can be used. The “high polymerization degree” mentioned here means that the weight average molecular weight is preferably in the above range. Among them, from the viewpoints of further improving the storage stability and injectability of the aerosol composition and improving the foam quality, as the component (C’), it is preferably at least one selected from the group consisting of water-soluble polysaccharides and polyalkylene glycols with a high degree of polymerization, more preferably at least one selected from the group consisting of starch, guar gum, tara gum, locust bean gum, glucomannan, polyethylene glycol with a high degree of polymerization, and polyethylene glycol-polypropylene glycol copolymer, and still more preferably at least one selected from the group consisting of polyethylene glycol with a high degree of polymerization and polyethylene glycol-polypropylene glycol copolymer.

[0034] <aqueous medium> The aerosol stock solution constituting the aerosol composition of the present invention usually contains an aqueous medium from the viewpoint of dissolving or dispersing the components (A) to (C) and other components. Examples of the aqueous medium include water and organic solvents. Examples of the organic solvent include lower alcohols such as ethanol and isopropyl alcohol; and lower molecular weight diols having 6 or less carbon atoms such as 1,3-butylene glycol, ethylene glycol, propylene glycol, and dipropylene glycol. Among these, water is preferred as the aqueous medium.

[0035] <other components> The aerosol stock solution may appropriately contain other components within a range that does not impair the object of the present invention. Examples of such components include nonionic surfactants, anionic surfactants, amphoteric surfactants, organic acids or their salts, monoalcohols containing an aromatic ring, antioxidants, oils other than component (B), ionic polymers, silicones, anti-dandruff agents, vitamin agents, bactericides, anti-inflammatory agents, preservatives, chelating agents, moisturizing agents, pearlescent agents, ceramides, fragrances, ultraviolet absorbers, pH adjusters, plant extracts, etc., which are usually formulated in cosmetics and the like.

[0036] <content> The content of each component in the aerosol stock solution is preferably as follows from the viewpoints of the storage stability, care feeling, and improved injectability of the aerosol composition. The content of component (A) in the aerosol stock solution is preferably 0.2% by mass or more, more preferably 0.5% by mass or more, still more preferably 0.7% by mass or more, from the viewpoint of improving the care feeling of the aerosol composition. From the viewpoints of storage stability and improved injectability of the aerosol composition, it is preferably 6.0% by mass or less, more preferably 5.0% by mass or less, still more preferably 4.0% by mass or less, even more preferably 3.0% by mass or less, and even more preferably 2.5% by mass or less. And the content of component (A) in the aerosol stock solution is preferably 0.2% by mass or more and 6.0% by mass or less, more preferably 0.5% by mass or more and 5.0% by mass or less, still more preferably 0.5% by mass or more and 4.0% by mass or less, even more preferably 0.7% by mass or more and 3.0% by mass or less, and even more preferably 0.7% by mass or more and 2.5% by mass or less.

[0037] The content of component (B) in the aerosol stock solution is preferably 0.5% by mass or more, more preferably 1.0% by mass or more, still more preferably 1.5% by mass or more, from the viewpoint of improving the care feeling of the aerosol composition. From the viewpoints of storage stability and improved injectability of the aerosol composition, it is preferably 32% by mass or less, more preferably 30% by mass or less, still more preferably 20% by mass or less, even more preferably 15% by mass or less, even more preferably 10% by mass or less, and even more preferably 6.0% by mass or less. And the content of component (B) in the aerosol stock solution is preferably 0.5% by mass or more and 32% by mass or less, more preferably 1.0% by mass or more and 30% by mass or less, still more preferably 1.0% by mass or more and 20% by mass or less, even more preferably 1.5% by mass or more and 15% by mass or less, even more preferably 1.5% by mass or more and 10% by mass or less, and even more preferably 1.5% by mass or more and 6.0% by mass or less.

[0038] The molar ratio of component (B) to component (A) in the aerosol stock solution [(B) / (A)] is preferably 1.5 or more, more preferably 2.0 or more, still more preferably 2.5 or more, and even more preferably 3.0 or more from the viewpoint of improving the storage stability of the aerosol composition, and is preferably 7.0 or less, more preferably 6.0 or less, still more preferably 5.0 or less, and even more preferably 4.0 or less from the viewpoint of improving the injectability of the aerosol composition. And the molar ratio of component (B) to component (A) in the aerosol stock solution [(B) / (A)] is preferably 1.5 or more and 7.0 or less, more preferably 2.0 or more and 6.0 or less, still more preferably 2.5 or more and 5.0 or less, and even more preferably 3.0 or more and 4.0 or less.

[0039] The mass ratio of component (B) to component (A) in the aerosol stock solution [(B) / (A)] is preferably 0.5 or more, more preferably 1.0 or more, still more preferably 1.5 or more, and even more preferably 2.0 or more from the viewpoint of improving the storage stability of the aerosol composition, and is preferably 5.0 or less, more preferably 4.0 or less, still more preferably 3.5 or less, and even more preferably 3.0 or less from the viewpoint of improving the injectability of the aerosol composition. And the mass ratio of component (B) to component (A) in the aerosol stock solution [(B) / (A)] is preferably 0.5 or more and 5.0 or less, more preferably 1.0 or more and 4.0 or less, still more preferably 1.5 or more and 3.5 or less, and even more preferably 2.0 or more and 3.0 or less.

[0040] From the perspective of improving the care feeling of the aerosol composition, the total content of component (A) and component (B) in the aerosol stock solution is preferably 0.7% by mass or more, more preferably 1.5% by mass or more, still more preferably 2.0% by mass or more, and even more preferably 2.2% by mass or more. From the perspectives of the storage stability and the improvement of the injectability of the aerosol composition, it is preferably 38% by mass or less, more preferably 35% by mass or less, still more preferably 25% by mass or less, even more preferably 20% by mass or less, even more preferably 10% by mass or less, and even more preferably 8.5% by mass or less. And the total content of component (A) and component (B) in the aerosol stock solution is preferably 0.7% by mass or more and 38% by mass or less, more preferably 1.5% by mass or more and 35% by mass or less, still more preferably 1.5% by mass or more and 25% by mass or less, even more preferably 2.0% by mass or more and 20% by mass or less, even more preferably 2.2% by mass or more and 10% by mass or less, and even more preferably 2.2% by mass or more and 8.5% by mass or less.

[0041] From the perspectives of the storage stability and the improvement of the care feeling of the aerosol composition, the mass ratio [(C) / ((A)+(B))] of the content of component (C) to the total content of component (A) and component (B) in the aerosol stock solution is 0.038 or more, preferably 0.039 or more, and more preferably 0.040 or more. Also, from the perspectives of the improvement of the care feeling and the injectability of the aerosol composition, it is 0.80 or less, preferably 0.60 or less, more preferably 0.50 or less, and still more preferably 0.40 or less. And the mass ratio [(C) / ((A)+(B))] is 0.038 or more and 0.80 or less, preferably 0.039 or more and 0.60 or less, more preferably 0.040 or more and 0.60 or less, still more preferably 0.040 or more and 0.50 or less, and even more preferably 0.040 or more and 0.40 or less.

[0042] The content of component (C) in the aerosol stock solution is not particularly limited as long as the mass ratio [(C) / ((A)+(B))] is within the above range. However, from the viewpoints of the storage stability of the aerosol composition and the improvement of the care feeling, it is preferably 0.03% by mass or more, more preferably 0.08% by mass or more, still more preferably 0.10% by mass or more, even more preferably 0.15% by mass or more, even more preferably 0.20% by mass or more, even more preferably 0.40% by mass or more, and even more preferably 0.60% by mass or more. From the viewpoint of improving the injectability of the aerosol composition, it is preferably 20% by mass or less, more preferably 15% by mass or less, still more preferably 10% by mass or less, even more preferably 5.0% by mass or less, even more preferably 3.4% by mass or less, even more preferably 2.5% by mass or less, and even more preferably 1.2% by mass or less. And the content of component (C) in the aerosol stock solution is preferably 0.03% by mass or more and 20% by mass or less, more preferably 0.08% by mass or more and 15% by mass or less, still more preferably 0.10% by mass or more and 10% by mass or less, even more preferably 0.15% by mass or more and 5.0% by mass or less, even more preferably 0.20% by mass or more and 3.4% by mass or less, even more preferably 0.4% by mass or more and 2.5% by mass or less, even more preferably 0.40% by mass or more and 1.2% by mass or less, and even more preferably 0.60% by mass or more and 1.2% by mass or less.

[0043] When the aerosol stock solution contains component (E): sugar alcohol, the content of component (E) in the aerosol stock solution is preferably 0.1% by mass or more, more preferably 0.2% by mass or more, still more preferably 0.5% by mass or more, even more preferably 1.0% by mass or more, and even more preferably 2.0% by mass or more from the viewpoint of further improving the storage stability of the aerosol composition. Also, it is preferably 20% by mass or less, more preferably 15% by mass or less, still more preferably 10% by mass or less, and even more preferably 7.0% by mass or less. And the content of component (E) in the aerosol stock solution is preferably 0.1% by mass or more and 20% by mass or less, more preferably 0.2% by mass or more and 15% by mass or less, still more preferably 0.5% by mass or more and 10% by mass or less, even more preferably 1.0% by mass or more and 10% by mass or less, and even more preferably 2.0% by mass or more and 7.0% by mass or less.

[0044] When the aerosol stock solution contains component (E): sugar alcohol, the mass ratio [(E) / ((A)+(B))] of the content of component (E) to the total content of components (A) and (B) in the aerosol stock solution is preferably 0.1 or more, more preferably 0.2 or more, still more preferably 0.4 or more, from the viewpoints of improving the storage stability and sprayability of the aerosol composition, and is preferably 2 or less, more preferably 1 or less, still more preferably 0.8 or less. And the mass ratio [(E) / ((A)+(B))] is preferably 0.1 or more and 2 or less, more preferably 0.2 or more and 1 or less, still more preferably 0.4 or more and 0.8 or less.

[0045] When the aerosol stock solution contains component (C’): a nonionic polymer other than component (C), the content of component (C’) in the aerosol stock solution is preferably 0.01% by mass or more, more preferably 0.05% by mass or more, still more preferably 0.1% by mass or more, from the viewpoints of further improving the storage stability and sprayability of the aerosol composition and improving the foam quality. Also, from the viewpoints of improving the storage stability and sprayability of the aerosol composition, it is preferably 5% by mass or less, more preferably 2% by mass or less, still more preferably 1% by mass or less, even more preferably 0.5% by mass or less. And the content of component (C’) in the aerosol stock solution is preferably 0.01% by mass or more and 5% by mass or less, more preferably 0.05% by mass or more and 2% by mass or less, still more preferably 0.1% by mass or more and 1% by mass or less, even more preferably 0.1% by mass or more and 0.5% by mass or less.

[0046] The content of the aqueous medium in the aerosol stock solution is preferably 60% by mass or more, more preferably 70% by mass or more, from the viewpoints of dissolving or dispersing components (A) to (C) and other components used as necessary, and improving the sprayability of the aerosol composition, and is preferably 98% by mass or less, more preferably 95% by mass or less.

[0047] The method for producing the aerosol stock solution is not particularly limited, and it can be produced by blending and mixing components (A) to (C) and other components used as necessary by a conventional method.

[0048] <ph> The pH of the aerosol stock solution at 30°C is preferably 3.0 or higher, more preferably 3.5 or higher, and preferably 6.0 or lower, more preferably 5.0 or lower, and still more preferably 4.5 or lower, from the viewpoint of further improving the storage stability of the aerosol composition after mixing with a propellant containing carbon dioxide. The pH of the aerosol stock solution can be measured at 30°C using a pH meter (manufactured by Horiba, Ltd., model number F-22).

[0049] <Viscosity> The viscosity of the aerosol stock solution at 30°C is preferably 10,000 mPa·s or lower, more preferably 8,000 mPa·s or lower, still more preferably 5,000 mPa·s or lower, and even more preferably 4,000 mPa·s or lower, from the viewpoint of improving the injectability of the aerosol composition. The lower limit of the viscosity is not particularly limited, but is preferably 100 mPa·s or higher from the viewpoint of improving the foam quality. The viscosity of the aerosol stock solution can be measured at 30°C using a rotational viscometer. For example, it can be measured using a B-type viscometer (TVB-10 type viscometer, manufactured by Toki Sangyo Co., Ltd.) at 25°C, using an appropriate rotor and rotation speed corresponding to the measured viscosity, and with a measurement time of 1 minute. If it is within the above preferred viscosity range, it can be measured with a rotor: T-C and a rotation speed: 10 rpm.

[0050] <Component (D): Propellant> The propellant (D) constituting the aerosol composition of the present invention contains carbon dioxide. By containing carbon dioxide as component (D), fine and dense foam can be discharged. Further, when the discharged foam is brought into contact with an object, it is considered that a high-concentration care component can be supplied to the object, and a good care feeling can be exhibited.

[0051] From the viewpoints of improving the foam quality of the aerosol composition and enhancing the care feeling, the content of carbon dioxide in component (D) is preferably 50% by mass or more, more preferably 70% by mass or more, still more preferably 80% by mass or more, even more preferably 90% by mass or more, and even more preferably 100% by mass. That is, it is preferable that the propellant (D) consists only of carbon dioxide. As propellants other than carbon dioxide, component (D) may contain nitrogen, propane, normal butane, isobutane, liquefied petroleum gas (LPG) which is a mixture thereof, and other gases such as dimethyl ether and isopentane as long as the effects of the present invention are not impaired.

[0052] From the viewpoint of improving the injectability of the aerosol composition, when the total amount of the aerosol stock solution and the propellant (D) is 100% by mass, the filling amount of the propellant (D) in the aerosol composition of the present invention is preferably 0.5% by mass or more, more preferably 1% by mass or more, preferably 5% by mass or less, and more preferably 3% by mass or less.

[0053] Also, from the viewpoint of improving the injectability of the aerosol composition, the internal pressure of the aerosol container after filling with the propellant (D) is preferably 0.1 MPa or more, more preferably 0.3 MPa or more, preferably 1.3 MPa or less, and more preferably 1.0 MPa or less at 25°C.

[0054] <Aerosol container> The aerosol composition of the present invention is filled in an aerosol container and used. Examples of the aerosol container include known pressure-resistant containers made of metal, plastic, etc., and double-structure containers in which an inner bag is housed inside a pressure-resistant container. From the viewpoint that the aerosol stock solution and carbon dioxide can be uniformly mixed and sprayed, a pressure-resistant container in which the aerosol stock solution and the propellant are filled in the same container is preferable.

[0055] The method for preparing the aerosol composition of the present invention is not particularly limited. For example, it can be prepared by filling a pressure-resistant container constituting the aerosol container with the aerosol stock solution, attaching a valve, and then filling the propellant (D) from the valve portion.

[0056] <Method of using the aerosol composition> The method of using the aerosol composition of the present invention is not particularly limited as long as it has a step of discharging the composition in a foamed state from an aerosol container filled with the aerosol composition and applying it to an object. When the aerosol composition is a hair cosmetic composition, it has a step of discharging the composition in a foamed state from the aerosol container and applying it to the hair. The composition discharged in a foamed state may be applied to wet hair or dry hair depending on the type of the hair cosmetic composition. For example, when the aerosol composition of the present invention is a hair cleansing composition, methods including a step of applying the hair cleansing composition discharged in a foamed state to the hair and washing the hair can be mentioned. The step of washing the hair also includes an operation of foaming the hair cleansing composition on the hair and an operation of rinsing off the hair cleansing composition thereafter. When the aerosol composition of the present invention is a hair cosmetic composition such as a rinse, a conditioning agent, or a treatment agent, methods including applying the hair cosmetic composition discharged in a foamed state from the aerosol container to the hair in a wet or dry state after washing, allowing it to settle, and then rinsing off if necessary can be mentioned. The composition discharged in a foamed state contains carbon dioxide gas, and a high concentration of care components is present in the discharged foam. In addition, the composition discharged in a foamed state has good spreadability and can be evenly spread over the entire object and can be sufficiently made to settle. Therefore, by using the aerosol composition of the present invention on the hair, a high concentration of care components can be supplied to the hair, and furthermore, a uniform care feeling can be expressed.

[0057] When the aerosol composition is a hair cosmetic composition, the amount of the hair cosmetic composition applied to the hair is the mass ratio to the mass of the hair (mass of the hair cosmetic composition / mass of the hair), preferably 0.002 or more, more preferably 0.003 or more, and preferably 0.6 or less, more preferably 0.5 or less. The hair to be treated may be at least a part of the head hair.

[0058] Regarding the above-described embodiments, the present invention further discloses the following embodiments. <1> The following components (A) to (C): (A) Cationic surfactant (B) Higher alcohol (C) Nonionic polymer having a cellulose backbone An aerosol composition containing an aerosol stock solution containing the following components (A) to (C) and a propellant containing (D) carbon dioxide, wherein the mass ratio [(C) / ((A)+(B))] of the content of the component (C) to the total content of the component (A) and the component (B) is 0.038 or more and 0.80 or less. <2> The aerosol composition according to <1>, wherein the component (A) is preferably at least one selected from the group consisting of alkyldimethylamine, alkoxyalkyldimethylamine, alkylamidoalkyldimethylamine, and salts thereof, more preferably at least one selected from the group consisting of alkoxyalkyldimethylamine, alkylamidoalkyldimethylamine, and salts thereof, and still more preferably alkoxyalkyldimethylamine or a salt thereof. <3> The aerosol composition according to <1> or <2>, wherein the component (B) is preferably a linear saturated higher alcohol having 12 to 22 carbon atoms, more preferably 14 to 20 carbon atoms. <4> The aerosol composition according to any one of <1> to <3>, wherein the component (B) is at least one selected from the group consisting of lauryl alcohol, myristyl alcohol, cetyl alcohol, stearyl alcohol, and behenyl alcohol, preferably at least one selected from the group consisting of lauryl alcohol, cetyl alcohol, and stearyl alcohol, more preferably at least one selected from the group consisting of cetyl alcohol and stearyl alcohol, and still more preferably stearyl alcohol. <5> The aerosol composition according to any one of <1> to <4>, wherein the component (C) is at least one selected from the group consisting of cellulose, alkyl cellulose, hydroxyalkyl cellulose, and hydrophobized (C16-18) hydroxyalkyl cellulose, preferably at least one selected from the group consisting of cellulose, methyl cellulose, ethyl cellulose, hypromellose, hydroxyethyl cellulose, hydroxypropyl cellulose, and hydrophobized (C16-18) hydroxypropyl methyl cellulose, more preferably hydroxyalkyl cellulose, and still more preferably hydroxyethyl cellulose. <6> The aerosol composition according to any one of <1> to <5>, wherein the aerosol stock solution further contains a sugar alcohol as the component (E). <7> The aerosol composition according to <6>, wherein the component (E) is at least one selected from the group consisting of glycerin, sorbitol, mannitol, maltitol, lactose, maltotriitol, and xylitol, preferably at least one selected from the group consisting of glycerin, sorbitol, mannitol, and maltitol, more preferably one or two selected from the group consisting of sorbitol and glycerin, and still more preferably glycerin. <8> The aerosol composition according to any one of <1> to <7>, wherein the aerosol stock solution further contains a nonionic polymer other than the component (C) as the component (C’). <9> The weight-average molecular weight of the component (C’) is preferably 10,000 or more and 5,000,000 or less, more preferably 50,000 or more and 5,000,000 or less, still more preferably 100,000 or more and 4,000,000 or less, even more preferably 200,000 or more and 4,000,000 or less, and even more preferably 500,000 or more and 3,500,000 or less, which is the aerosol composition according to <8>. <10> The component (C’) is one or more selected from the group consisting of water-soluble polysaccharides, polyalkylene glycols with a high degree of polymerization, and polyvinyl alcohol, preferably one or more selected from the group consisting of water-soluble polysaccharides and polyalkylene glycols with a high degree of polymerization, more preferably one or more selected from the group consisting of starch, guar gum, tara gum, locust bean gum, glucomannan, polyethylene glycol with a high degree of polymerization, and polyethylene glycol - polypropylene glycol copolymer, and still more preferably one or more selected from the group consisting of polyethylene glycol with a high degree of polymerization and polyethylene glycol - polypropylene glycol copolymer, which is the aerosol composition according to <8> or <9>.

[0059] <11> The aerosol stock solution further contains an aqueous medium, which is the aerosol composition according to any one of <1> to <10>. <12> The aqueous medium is one or more selected from the group consisting of water, lower alcohols, and low molecular weight diols having 6 or less carbon atoms, preferably water, which is the aerosol composition according to <11>. <13> The content of the component (A) in the aerosol stock solution is preferably 0.2% by mass or more and 6.0% by mass or less, more preferably 0.5% by mass or more and 5.0% by mass or less, still more preferably 0.5% by mass or more and 4.0% by mass or less, even more preferably 0.7% by mass or more and 3.0% by mass or less, and even more preferably 0.7% by mass or more and 2.5% by mass or less, which is the aerosol composition according to any one of <1> to <12>. <14> The content of the component (B) in the aerosol stock solution is preferably 0.5% by mass or more and 32% by mass or less, more preferably 1.0% by mass or more and 30% by mass or less, still more preferably 1.0% by mass or more and 20% by mass or less, even more preferably 1.5% by mass or more and 15% by mass or less, even more preferably 1.5% by mass or more and 10% by mass or less, and even more preferably 1.5% by mass or more and 6.0% by mass or less. The aerosol composition according to any one of <1> to <13>. <15> The molar ratio [(B) / (A)] of the component (B) to the component (A) in the aerosol stock solution is preferably 1.5 or more and 7.0 or less, more preferably 2.0 or more and 6.0 or less, still more preferably 2.5 or more and 5.0 or less, and even more preferably 3.0 or more and 4.0 or less. The aerosol composition according to any one of <1> to <14>. <16> The mass ratio [(B) / (A)] of the component (B) to the component (A) in the aerosol stock solution is preferably 0.5 or more and 5.0 or less, more preferably 1.0 or more and 4.0 or less, still more preferably 1.5 or more and 3.5 or less, and even more preferably 2.0 or more and 3.0 or less. The aerosol composition according to any one of <1> to <15>. <17> The total content of the component (A) and the component (B) in the aerosol stock solution is preferably 0.7% by mass or more and 38% by mass or less, more preferably 1.5% by mass or more and 35% by mass or less, still more preferably 1.5% by mass or more and 25% by mass or less, even more preferably 2.0% by mass or more and 20% by mass or less, even more preferably 2.2% by mass or more and 10% by mass or less, and even more preferably 2.2% by mass or more and 8.5% by mass or less. The aerosol composition according to any one of <1> to <16>. <18> The mass ratio [(C) / ((A)+(B))] of the content of the component (C) to the total content of the component (A) and the component (B) in the aerosol stock solution is preferably 0.039 or more and 0.60 or less, more preferably 0.040 or more and 0.60 or less, still more preferably 0.040 or more and 0.50 or less, and even more preferably 0.040 or more and 0.40 or less. The aerosol composition according to any one of <1> to <17>. <19> The content of the component (C) in the aerosol stock solution is preferably 0.03% by mass or more and 20% by mass or less, more preferably 0.08% by mass or more and 15% by mass or less, still more preferably 0.10% by mass or more and 10% by mass or less, even more preferably 0.15% by mass or more and 5.0% by mass or less, even more preferably 0.20% by mass or more and 3.4% by mass or less, even more preferably 0.40% by mass or more and 2.5% by mass or less, even more preferably 0.40% by mass or more and 1.2% by mass or less, even more preferably 0.60% by mass or more and 1.2% by mass or less. The aerosol composition according to any one of <1> to <18>. <20> The content of the component (E) in the aerosol stock solution is preferably 0.1% by mass or more and 20% by mass or less, more preferably 0.2% by mass or more and 15% by mass or less, still more preferably 0.5% by mass or more and 10% by mass or less, even more preferably 1.0% by mass or more and 10% by mass or less, even more preferably 2.0% by mass or more and 7.0% by mass or less. The aerosol composition according to any one of <6> to <19>.

[0060] <21> The mass ratio [(E) / ((A)+(B))] of the content of the component (E) to the total content of the component (A) and the component (B) in the aerosol stock solution is preferably 0.1 or more and 2 or less, more preferably 0.2 or more and 1 or less, still more preferably 0.4 or more and 0.8 or less. The aerosol composition according to any one of <6> to <20>. <22> The content of the component (C’) in the aerosol stock solution is preferably 0.01% by mass or more and 5% by mass or less, more preferably 0.05% by mass or more and 2% by mass or less, still more preferably 0.1% by mass or more and 1% by mass or less, even more preferably 0.1% by mass or more and 0.5% by mass or less. The aerosol composition according to any one of <8> to <21>. <23> The content of the aqueous medium in the aerosol stock solution is preferably 60% by mass or more, more preferably 70% by mass or more, preferably 98% by mass or less, and more preferably 95% by mass or less. The aerosol composition according to any one of <1> to <22>. <24> The pH of the aerosol stock solution at 30 °C is preferably 3.0 or more, more preferably 3.5 or more, and preferably 6.0 or less, more preferably 5.0 or less, and still more preferably 4.5 or less. The aerosol composition according to any one of <1> to <23>. <25> The viscosity of the aerosol stock solution at 30 °C is preferably 10,000 mPa·s or less, more preferably 8,000 mPa·s or less, still more preferably 5,000 mPa·s or less, and even more preferably 4,000 mPa·s or less, and preferably 100 mPa·s or more. The aerosol composition according to any one of <1> to <24>. <26> The content of carbon dioxide in the component (D) is preferably 50% by mass or more, more preferably 70% by mass or more, still more preferably 80% by mass or more, even more preferably 90% by mass or more, and even more preferably 100% by mass. The aerosol composition according to any one of <1> to <25>. <27> When the total amount of the aerosol stock solution and the component (D) is 100% by mass, the filling amount of the component (D) in the aerosol composition is preferably 0.5% by mass or more, more preferably 1% by mass or more, and preferably 5% by mass or less, more preferably 3% by mass or less. The aerosol composition according to any one of <1> to <26>. <28> The aerosol composition is a hair cosmetic composition, preferably a rinse, a conditioning agent, a treatment agent, or a styling agent, more preferably a rinse, a conditioning agent, or a treatment agent. The aerosol composition according to any one of <1> to <27>. <29> A method for using the aerosol composition according to any one of <1> to <28>, the method comprising the step of discharging the composition in a foamed state from an aerosol container filled with the aerosol composition and applying it to an object.

Examples

[0061] Hereinafter, the present invention will be described by way of examples, but the present invention is not limited to the scope of the examples.

[0062] Examples 1 to 16, Comparative Examples 1 to 5 (Production and Evaluation of Aerosol Conditioner) The compounding components of the aerosol stock solution were compounded according to the composition shown in the table and mixed until uniform to prepare an aerosol stock solution. The pH of the aerosol stock solution at 30 °C was in the range of 3.5 to 4.5. Next, an aerosol conditioner was produced in the following manner, and evaluations of stability, care feeling (the feel of hair during rinsing), and sprayability were performed. Note that the compounding amounts described in each table are the active ingredient amounts (mass %) of each component.

[0063] (Stability) 50 g of the aerosol stock solution and the propellant shown in each table were filled into a 100 mL transparent pressure-resistant container (manufactured by Toyo Seikan Kaisha, Ltd.) so as to have the mass ratio shown in the table to produce an aerosol conditioner. The internal pressure of the aerosol container after filling with the propellant was adjusted to be in the range of 0.55 to 0.85 MPa. The aerosol conditioner was allowed to stand in an explosion-proof warehouse at 45 °C, and the appearance of the contents of the pressure-resistant container was visually observed and evaluated according to the following three-level evaluation criteria. 〔Evaluation Criteria〕 A: No separation or precipitation is observed even after 90 days B: No separation or precipitation is observed after 3 days, but separation or precipitation is observed within 90 days C: Separation or precipitation is observed within 3 days

[0064] (Care feeling (the feel of hair during rinsing)) A hair tress with a length of 30 cm, a width of 5.5 cm, and a weight of 20 g was rinsed with warm water at 35 to 40 °C for 30 seconds or more and then washed using a plain shampoo having the following composition. 154.52 g of the aerosol stock solution and the propellants shown in each table were filled into an aluminum pressure-resistant container (Φ53 mm) with a capacity of 170 mL so as to have the mass ratios shown in the table, and an aerosol conditioner was prepared. Using this aerosol conditioner, about 1.0 g of the foamy conditioner was discharged onto the palm and allowed to acclimatize to the hair tress after the washing treatment for 30 seconds. Subsequently, a professional panelist evaluated the feel of the hair when rinsing with warm water at 35 to 40 °C for 30 seconds according to the following three-level evaluation criteria. 〔Evaluation Criteria〕 A: The fingers can pass smoothly without feeling the hardness or roughness of the hair. B: The fingers can pass smoothly while slightly feeling the hardness and roughness of the hair. C: The hardness and roughness of the hair are felt.

[0065] 〔Plain Shampoo Composition〕 Ingredient (mass%) Sodium polyoxyethylene (2) lauryl ether sulfate (*1) 15.5 Diethanolamine laurate (*2) 2.28 Disodium edetate 0.15 Sodium benzoate 0.5 Phosphoric acid (85%) 0.08 Sodium chloride 0.8 Fragrance 0.4 Purified water Remaining amount Total 100.0 *1: 57.4 mass% as Emal 227 (manufactured by Kao Corporation, active ingredient 27 mass%) *2: Aminon L-02 (manufactured by Kao Corporation)

[0066] (Sprayability) 154.52 g of the aerosol stock solution and the propellants shown in each table were filled into an aluminum pressure-resistant container (Φ53 mm) with a volume of 170 mL so as to have the mass ratios shown in the table, and an aerosol conditioner was prepared. After the aerosol conditioner was acclimated in a thermostatic bath at 30°C for 1 hour, spraying was performed every 10 seconds, and the weight (g) of the sprayed material was measured. The average value of the spraying amounts in three sprays was taken as the average spraying amount, and evaluation was carried out according to the following three-level evaluation criteria. 〔Evaluation Criteria〕 A: The average spraying amount is 20.0 g or more B: The average spraying amount is 10.0 g or more and less than 20.0 g C: The average spraying amount is less than 10.0 g

[0067]

Table 1

[0068] The components used in the table are as follows. *1: Stearoxypropyldimethylamine [N,N-dimethyl-3-octadecyloxypropylamine], "Farmin DM-E80" manufactured by Kao Corporation, active ingredient content 90% by mass *2: Stearyl alcohol, "Calcohol 8098" manufactured by Kao Corporation *3: Hydroxyethyl cellulose, "HEC Daicel SE850K" manufactured by Daicel Corporation *4: Glycerin, "Cosmetic Grade Concentrated Glycerin A" manufactured by Kao Corporation *5: Polyethylene glycol (PEG-45M), "Polyox WSR N-60K" manufactured by The Dow Chemical Company, Mw: 2,000,000 *6: Benzyl alcohol, manufactured by Toyotama Perfumery Co., Ltd. *7: Phenoxyethanol, "Neolone PH 100" manufactured by The Dow Chemical Company *8: Bis-methoxypropylamidodocosane [N,N-bis(3-methoxypropyl) isodocosanediamide], "BRS661" manufactured by Kao Corporation *9: Dimethicone, "DOWSIL BY 11-039" manufactured by Dow Corning Toray Co., Ltd. *10: Amodimethicone, "DOWSIL SF 8457 C" manufactured by Dow Corning Toray Co., Ltd. *11: Fragrance, "VM-SSEG-5" manufactured by V.M. & F. Flavors Co., Ltd.

[0069] As shown in the table, the aerosol conditioner of this example has good stability, the feel of hair during rinsing, and injectability. On the other hand, in Comparative Example 1 where the mass ratio [(C) / ((A)+(B))] in the aerosol stock solution exceeds 0.80, the feel of hair during rinsing and injectability decrease. In Comparative Examples 2 and 3 where the mass ratio [(C) / ((A)+(B))] is less than 0.038, the feel of hair during rinsing decreases. The aerosol conditioner of Comparative Example 4 using an aerosol stock solution not containing component (C) has decreased stability and the feel of hair during rinsing. In Comparative Example 5 using a propellant not containing carbon dioxide, the stability, the feel of hair during rinsing, and injectability are all inferior.

Industrial Applicability

[0070] According to the present invention, an aerosol composition excellent in storage stability and care feeling and having good injectability can be provided.< / ph>

Claims

1. The following components (A) to (C): (A) Alkoxyalkyldimethylamine or a salt thereof (B) A linear saturated higher alcohol having 14 to 20 carbon atoms (C) A nonionic polymer having a cellulose skeleton An aerosol composition containing an aerosol stock solution containing the above components and (D) a propellant containing carbon dioxide, wherein the mass ratio [(C) / ((A)+(B))] of the content of the component (C) to the total content of the component (A) and the component (B) is 0.152 or more and 0.40 or less, and the content of the component (C) in the aerosol stock solution is 0.60% by mass or more and 1.2% by mass or less.

2. The aerosol composition according to Claim 1, wherein the molar ratio [(B) / (A)] of the component (B) to the component (A) is 1.5 or more and 7.0 or less.

3. The aerosol composition according to Claim 1 or 2, wherein the aerosol stock solution further contains a sugar alcohol as the component (E).

4. The aerosol composition according to Claim 3, wherein the component (E) is glycerin.

5. The aerosol composition according to Claim 1 or 2, wherein the content of carbon dioxide in the component (D) is 50% by mass or more.

6. The aerosol composition according to Claim 1 or 2, which is a hair cosmetic composition.

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