JP2022024835A - Aerosol composition for hair - Google Patents

Abstract

To provide an aerosol composition for hair with excellent solubility of resin for styling and a wide spread of sprayed particles.SOLUTION: An aerosol composition for hair includes a stock solution containing resin for styling and alcohol, a hydrofluoroolefin with a boiling point of 5-40°C, and liquefied gas with a boiling point of lower than 5°C and forms a uniform phase.SELECTED DRAWING: None

Description

The present invention relates to an aerosol composition for hair. More specifically, the present invention relates to an aerosol composition for hair, which can maintain a uniform composition even when a styling resin is blended in a high concentration and has a large spread of spray particles.

Conventionally, aerosol products for styling have been developed. Patent Document 1 discloses an aerosol composition for hair containing a styling resin, an alcohol, and a hydrofluoroolefin having a boiling point of less than 5 ° C.

U.S. Patent Application Publication No. 2013/0280178

Patent Document 1 describes a hair spray using a hydrofluoroolefin for safety against fire. However, since the hydrofluoroolefin having a boiling point of less than 5 ° C. has poor solubility of the styling resin, the amount of the styling resin that can be blended is limited, and a sufficient setting force cannot be obtained.

The present invention has been made in view of such conventional problems, and has excellent solubility of the styling resin, and can maintain a uniform composition even when the styling resin is blended in a high concentration. It is an object of the present invention to provide an aerosol composition for hair which can be formed and has a large spread of spray particles.

The present invention that solves the above problems mainly includes the following configurations.

(1) An aerosol composition for hair containing a stock solution containing a styling resin and an alcohol, a hydrofluoroolefin having a boiling point of 5 to 40 ° C., and a liquefied gas having a boiling point of less than 5 ° C. to form a uniform phase. ..

According to such a configuration, even if the aerosol composition for hair contains a styling resin in a resin amount that provides a desired setting force, the styling resin is stably dissolved and a uniform composition is maintained. A hair spray with a large spread of spray particles can be obtained.

(2) The aerosol composition for hair according to (1), wherein the content (solid content) of the styling resin is 5 to 30% by mass in the undiluted solution.

According to such a configuration, the aerosol composition for hair tends to obtain the desired high setting force.

(3) The hair aerosol composition according to (1) or (2), wherein the content of the hydrofluoroolefin having a boiling point of 5 to 40 ° C. is 5 to 70% by mass in the hair aerosol composition.

According to such a configuration, even if the aerosol composition for hair contains a styling resin so as to have a desired amount of resin, the styling resin can be stably dissolved and a uniform composition can be maintained. The spray particles can be easily spread, and the spray particles can be thinly and evenly adhered to the hair.

(4) The hair aerosol composition according to any one of (1) to (3), wherein the content of the liquefied gas having a boiling point of less than 5 ° C. is 10 to 60% by mass in the hair aerosol composition. thing.

According to such a configuration, the aerosol composition for hair is easily sprayed with an appropriate force and adheres to the hair.

(5) The aerosol composition for hair according to any one of (1) to (4), wherein the liquefied gas having a boiling point of less than 5 ° C. contains a hydrofluoroolefin having a boiling point of less than 5 ° C.

According to such a configuration, the aerosol composition for hair tends to form a hard film on the hair, and a strong setting force can be easily obtained.

(6) The liquefied gas having a boiling point of less than 5 ° C. contains a hydrofluoroolefin having a boiling point of less than 5 ° C., and the content of the hydrofluoroolefin having a boiling point of less than 5 ° C. is contained in the aerosol composition for hair. The aerosol composition for hair according to any one of (1) to (5), which is 5 to 60% by mass.

According to such a configuration, the aerosol composition for hair is sprayed with an appropriate force and easily adheres to the hair, and a strong setting force can be easily obtained.

(7) The liquefied gas having a boiling point of less than 5 ° C. contains a hydrofluoroolefin having a boiling point of less than 5 ° C., and an aerosol for hair of the styling resin and the hydrofluoroolefin having a boiling point of less than 5 ° C. The aerosol composition for hair according to any one of (1) to (6), wherein the content ratio (mass ratio) in the composition is 1/15 to 4/5.

According to such a configuration, the aerosol composition for hair tends to obtain a high set holding power.

(8) The ratio (mass ratio) of the content of the styling resin to the hydrofluoroolefin having a boiling point of 5 to 40 ° C. in the hair aerosol composition is 1/30 to 2/1. The aerosol composition for hair according to any one of (1) to (7).

According to such a configuration, the aerosol composition for hair can stably dissolve the styling resin even at a low temperature to maintain a uniform composition, and a hair spray having a large spread of spray particles can be obtained. Cheap.

According to the present invention, an aerosol composition for hair which has excellent solubility of a styling resin, can maintain a uniform composition even when a high concentration of the styling resin is blended, and has a large spread of spray particles. Can be provided.

<Aerosol composition for hair>
The aerosol composition for hair according to an embodiment of the present invention contains a stock solution containing a styling resin and an alcohol, a hydrofluoroolefin having a boiling point of 5 to 40 ° C., and a liquefied gas having a boiling point of less than 5 ° C. Form a homogeneous phase. Each will be described below. In addition, forming a uniform phase means that the liquid phase of the aerosol composition for hair is in a uniform state without any turbidity or precipitates due to the styling resin.

(Undiluted solution)
The undiluted solution contains a styling resin and alcohol.

-Styling resin The styling resin is blended to set the hair.

The styling resin is not particularly limited. For example, the styling resin is an anion-type resin such as (Acrylate / Diacetoneacrylamide) copolymer, (Acrylate / Alkyl acrylate (C1-18) / Alkyl (C1-8) acrylamide) copolymer, and Alkanolamine acrylate. , (Octylacrylamide / hydroxypropyl acrylate / butylaminoethyl methacrylate) copolymer, dialkylaminoethyl (meth) acrylate- (meth) acrylic acid alkyl ester copolymer, octylamide acrylate-hydroxypropyl acrylate-butyl methacrylate Amphoteric resins such as aminoethyl copolymers, vinylpyrrolidone-N, N-dimethylaminoethyl methacrylate copolymer sulfates, cationic resins such as hydroxyethylcellulose and dimethyldiallylammonium chloride, alkyl acrylate copolymer emulsions, Emulsion-type resins such as alkyl acrylate-styrene copolymer emulsions, (dimethylacrylamide / hydroxyethyl acrylate / methoxyethyl acrylate) copolymers, vinylpyrrolidone-vinyl acetate copolymers, hydroxyethyl acrylate-butyl acrylate-acrylic acid It is a nonionic resin such as a methoxyethyl acid copolymer. The styling resin may be used in combination.

Further, the styling resin is preferably blended with a neutralizing agent in order to impart water solubility and facilitate washing with shampoo or the like.

The neutralizing agent is not particularly limited. As an example, the neutralizing agents are 2-amino-2-methyl-1-propanol (AMP), tetrahydroxypropylethylenediamine, triisopropanolamine (TIPA), 2-amino-2-methyl-1,3-propane. Examples thereof include diol (AMPD), 2-amino-2-ethyl-1,3-propanediol (AEPD), triethanolamine (TEA), diisopropanolamine (DIPA), sodium hydroxide and potassium hydroxide. Neutralizers may be used in combination. The neutralizing agent is preferably added in an amount such that the degree of neutralization is close to 100%.

The content (solid content) of the styling resin is not particularly limited. As an example, the content (solid content) of the styling resin is preferably 5% by mass or more, and more preferably 7% by mass or more in the undiluted solution. The content (solid content) of the styling resin is preferably 30% by mass or less, more preferably 25% by mass or less in the undiluted solution. When the content (solid content) of the styling resin is within the above range, the aerosol composition for hair tends to exhibit a desired setting force.

-Alcohol Alcohol dissolves the styling resin in the undiluted solution to form a uniform phase, forms particles of a size that makes it easy for the aerosol composition for hair to adhere to the hair, sprays it uniformly, and adheres to the hair. It is compounded to adjust the dryness.

Alcohol is not particularly limited. As an example, the alcohol is a monohydric alcohol having 2 to 3 carbon atoms such as ethanol and isopropanol.

The content of alcohol is not particularly limited. As an example, the content of alcohol in the undiluted solution is preferably 65% by mass or more, more preferably 70% by mass or more. The alcohol content in the undiluted solution is preferably 93% by mass or less, more preferably 90% by mass or less. When the alcohol content is within the above range, the sprayed aerosol composition for hair tends to have a particle size that easily adheres to the hair, can prevent inhalation by consumers, and can adjust the drying property. ..

-Arbitrary component The undiluted solution of the present embodiment may contain an active ingredient as an optional component in addition to the above-mentioned stalling resin and alcohol. The active ingredient is not particularly limited. For example, the active ingredient is an ultraviolet absorber such as hexyl diethylaminohydroxybenzoyl benzoate, 2-ethylhexyl paramethoxysilicate, ethylhexyltriazone, oxybenzene, hydroxybenzophenone sulfonic acid, sodium dihydroxybenzophenone sulfonate, dihydroxybenzophenone. , Zinc oxide, Titanium oxide, UV scatterers such as octyltrimethoxysilane coated titanium oxide, Retinol, Retinol acetate, Retinol palmitate, Calcium pantothenate, Ascorbic acid, Sodium ascorbate, dl-α-tocopherol, Tocopherol acetate, Tocopherol , Vitamin such as tocopherol nicotinate, dibenzoylthiamine, riboflavin and mixtures thereof, various extracts such as assembly extract and rosemary extract, glycerin, 1,3-butylene glycol, propylene glycol, hexylene glycol, di Moisturizers such as propylene glycol, diglycerin, hyaluronic acid, fragrances such as floral, green, citrus green, green floral, citrus, rose, rosewood, herbal wood, lemon, peppermint, pigments such as aluminum powder, silica, iron oxide , Yellow 4, Yellow 5, Yellow 202, Yellow 203, Red 2, Red 3, Blue 1, Blue 2, etc., Polysolvate, Polyglycerin fatty acid ester, Polyoxyethylene alkyl ether, etc. These include surfactants, chelating agents such as disodium edetate, preservatives such as paraben and phenyloxyethanol, and various oil components such as hydrocarbon oil, silicone oil, and ester oil.

When the active ingredient is blended, the content of the active ingredient is not particularly limited. As an example, the content of the active ingredient is preferably 0.1% by mass or more, more preferably 0.3% by mass or more in the undiluted solution. The content of the active ingredient is preferably 20% by mass or less, more preferably 15% by mass or less in the undiluted solution. When the content of the active ingredient is within the above range, the obtained aerosol composition for hair can easily obtain the desired effect by blending the active ingredient.

The content of the undiluted solution is not particularly limited. As an example, the content of the undiluted solution is preferably 10% by mass or more, more preferably 15% by mass or more in the aerosol composition for hair. The content of the undiluted solution is preferably 80% by mass or less, and more preferably 70% by mass or less in the aerosol composition for hair. When the content of the undiluted solution is within the above range, the aerosol composition for hair is adjusted so that the particles when sprayed have an appropriate size, and it is easy to obtain a desired high setting force.

The method for preparing the undiluted solution is not particularly limited. The undiluted solution can be prepared by a conventionally known method. For example, the undiluted solution can be prepared by mixing the above-mentioned styling resin, an optional ingredient such as an alcohol or an active ingredient.

(Hydrofluoroolefin having a boiling point of 5 to 40 ° C)
Hydrofluoroolefins having a boiling point of 5 to 40 ° C. are added to increase the solubility of the styling resin in the aerosol composition for hair and to increase the spread of spray particles. Further, the hydrofluoroolefin having a boiling point of 5 to 40 ° C. enhances the drying property of the aerosol composition for hair attached to the hair.

The hydrofluoroolefin having a boiling point of 5 to 40 ° C. is not particularly limited. As an example, hydrofluoroolefins having a boiling point of 5 to 40 ° C. are trans-1-chloro-3,3,3-trifluoropropene (HFO-1233zd (E), boiling point 19 ° C.), cis-1-. Chloro-3,3,3-trifluoropropene (HFO-1233zd (Z), boiling point 39 ° C.) and the like.

The content of the hydrofluoroolefin having a boiling point of 5 to 40 ° C. is not particularly limited. As an example, the content of the hydrofluoroolefin having a boiling point of 5 to 40 ° C. is preferably 5% by mass or more, more preferably 7% by mass or more in the aerosol composition for hair. The content of the hydrofluoroolefin having a boiling point of 5 to 40 ° C. is preferably 70% by mass or less, more preferably 65% by mass or less in the aerosol composition for hair. Since the content of the hydrofluoroolefin having a boiling point of 5 to 40 ° C. is within the above range, the hair aerosol composition may contain a resin amount of a styling resin that provides a desired setting force. The uniform state in which the styling resin is dissolved is maintained, and when sprayed, the effect of increasing the spread of the sprayed particles and increasing the dryness of the deposits when they adhere to the hair can be easily obtained.

The content ratio (mass ratio) of the styling resin and the hydrofluoroolefin having a boiling point of 5 to 40 ° C. is preferably 1/30 to 2/1, preferably 1/20 to 14/25. Is more preferable. When the ratio of the content of the styling resin and the hydrofluoroolefin having a boiling point of 5 to 40 ° C. is within the above range, the hair aerosol composition stably dissolves the styling resin even at a low temperature and is uniform. It is easy to obtain a hair spray having a good composition, and a hair spray having a large spread of spray particles can be obtained.

(Liquefied gas with a boiling point of less than 5 ° C)
The liquefied gas having a boiling point of less than 5 ° C. is mixed with a hydrofluoroolefin having a boiling point of 5 to 40 ° C., the pressure of the hair aerosol composition is adjusted, and the liquefied gas is sprayed onto the hair with an appropriate jetting force and adheres to the hair. It is easy to use and is formulated to obtain the desired high setting force.

The liquefied gas having a boiling point of less than 5 ° C. is not particularly limited. As an example, the liquefied gas having a boiling point of less than 5 ° C. is trans-1,3,3,3-tetrafluoropropa-1-ene (HFO-1234ze (E), boiling point -19 ° C.), trans-2. , 3,3,3-Tetrafluoropropa-1-ene (HFO-1234yf, boiling point -30 ° C) and other hydrofluoroolefins, normal butane (boiling point -0.5 ° C), isobutane (boiling point-11.7 ° C) , Propane (boiling point −42 ° C.) and a mixture thereof, such as liquefied petroleum gas and dimethyl ether (boiling point −25 ° C.), preferably containing a hydrofluoroolefin having a boiling point of less than 5 ° C. Further, a liquefied gas having a boiling point of less than 5 ° C. may be used in combination.

The content of the liquefied gas having a boiling point of less than 5 ° C. is not particularly limited. As an example, the content of the liquefied gas having a boiling point of less than 5 ° C. is preferably 10% by mass or more, more preferably 15% by mass or more in the aerosol composition for hair. The content of the liquefied gas having a boiling point of less than 5 ° C. is preferably 60% by mass or less, more preferably 55% by mass or less in the aerosol composition for hair. When the content of the liquefied gas having a boiling point of less than 5 ° C. is within the above range, the sprayed particles easily adhere to the hair in the aerosol composition for hair, and the desired high setting force can be easily obtained.

When a hydrofluoroolefin having a boiling point of less than 5 ° C. is contained, the content of the hydrofluoroolefin having a boiling point of less than 5 ° C. is not particularly limited. As an example, the content of the hydrofluoroolefin having a boiling point of less than 5 ° C. is preferably 5% by mass or more, more preferably 10% by mass or more in the aerosol composition for hair. The content of the hydrofluoroolefin having a boiling point of less than 5 ° C. is preferably 60% by mass or less, more preferably 55% by mass or less in the aerosol composition for hair. When the content of the hydrofluoroolefin having a boiling point of less than 5 ° C. is within the above range, the aerosol composition for hair tends to form a hard film on the hair, and a strong setting force can be easily obtained.

The content ratio (mass ratio) of the styling resin and the hydrofluoroolefin having a boiling point of less than 5 ° C. is preferably 1/15 to 4/5, preferably 1/12 to 7/15. Is more preferable. When the ratio of the contents of the styling resin and the hydrofluoroolefin having a boiling point of less than 5 ° C. is within the above range, the aerosol composition for hair can easily obtain a high set holding power.

In the aerosol composition for hair, a compressed gas may be used in combination with a hydrofluoroolefin having a boiling point of 5 to 40 ° C. or a liquefied gas having a boiling point of less than 5 ° C.

The compressed gas is not particularly limited. As an example, the compressed gas is nitrogen, air, oxygen, hydrogen, carbon dioxide, nitrous oxide and the like.

The compressed gas is preferably filled so that the pressure in the container at 25 ° C. is 0.3 MPa, and more preferably 0.4 MPa or more. Further, the compressed gas is preferably filled so that the pressure in the container at 25 ° C. is 0.7 MPa or less, and more preferably 0.6 MPa or less.

Returning to the description of the aerosol composition for hair, the method for producing the aerosol composition for hair of the present embodiment is not particularly limited. As an example, a hydrofluoroolefin having a boiling point of 5 to 40 ° C. is prepared by filling a pressure-resistant container with a stock solution, attaching a valve to the opening of the pressure-resistant container, and mixing the valve with a predetermined ratio. It can be prepared by filling with a liquefied gas having a boiling point of less than 5 ° C. and mixing with the undiluted solution in a container. Further, by attaching an injection member to the stem of the valve, an injection product can be manufactured. Hydrofluoroolefins having a boiling point of 5 to 40 ° C. and liquefied gas having a boiling point of less than 5 ° C. may be filled in this order. In this case, it is possible to prevent the resin from precipitating even during filling.

The aerosol product filled with the aerosol composition for hair of the present embodiment mainly includes a container filled with the aerosol composition for hair and a valve attached to the container.

(container)
The container is a pressure-resistant container filled with an aerosol composition for hair and has a bottomed tubular shape. A valve is attached to the opening of the container.

The material of the container is not particularly limited. As an example, the material of the container is metal such as aluminum and tinplate, various synthetic resins, pressure-resistant glass and the like.

(valve)
The valve is a member for closing and sealing the opening of the container. In addition, the valve is attached to the housing, a stem with a stem hole that communicates inside and outside the container, a spring that urges the stem upward, and a stem rubber that is attached around the stem hole to close the stem hole. Mainly prepared for. The housing houses the stem, stem rubber and springs. The stem is a substantially cylindrical portion, and an intra-stem passage through which the hair aerosol composition taken into the housing at the time of spraying passes is formed. A stem hole is formed in the vicinity of the lower end of the in-stem passage to communicate the space in the housing with the in-stem passage. An injection member for injecting the aerosol composition for hair is attached to the upper end of the stem. The stem rubber is a member attached around the stem hole to appropriately shield the internal space of the housing from the outside. The stem rubber is a disk-shaped member, and when not injected, the inner peripheral surface is brought into close contact with the outer peripheral surface on which the stem hole of the stem is formed, and the stem hole is closed.

(Injection member)
The injection member is a member for operating the opening and closing of the valve to inject the aerosol composition for hair, and is attached to the upper end of the stem. The injection member mainly includes a nozzle portion in which an injection hole is formed and an operation portion operated by a user with a finger or the like. The aerosol composition for hair is sprayed from the jet holes. The number and shape of the injection holes are not particularly limited. There may be a plurality of injection holes. Further, the shape of the injection hole may be a substantially circular shape, a substantially angular shape, or the like.

In the aerosol product of the present embodiment, when the injection member is pushed down, the stem of the valve is pushed down downward. As a result, the stem rubber bends downward and the stem hole is opened. As a result, the inside of the container and the outside communicate with each other. When the inside and the outside of the container communicate with each other, the aerosol composition for hair is taken into the housing by the pressure difference between the inside of the container and the outside, and then is sent to the injection member through the stem hole and the passage in the stem. After that, it is injected from the injection hole.

As described above, the aerosol composition for hair of the present embodiment contains a stock solution containing a styling resin and an alcohol, a hydrofluoroolefin having a boiling point of 5 to 40 ° C., and a liquefied gas having a boiling point of less than 5 ° C., and is uniform. Form a phase. Even if the aerosol composition for hair contains a styling resin in a resin amount that provides a desired setting force, the styling resin is stably dissolved to easily maintain a uniform composition, and the spread of spray particles is large. Hairspray is obtained.

Hereinafter, the present invention will be described in more detail with reference to Examples. The present invention is not limited to these examples.

(Example 1)
The stock solution 1 was prepared according to the formulation (unit: mass%) shown in Table 1 below, and 60 g was filled in an aluminum aerosol container. Next, the aerosol valve was fixed to the opening of the aerosol container and sealed, and 20.0 g of hydrofluoroolefin (trans-1-chloro-3,3,3-trifluoropropene, boiling point 19 ° C.) from the stem and 20 A 9.0 g hydrofluoroolefin (trans-1,3,3,3-tetrafluoropropa-1-ene, boiling point -19 ° C.) was filled, and the undiluted solution and the hydrofluoroolefin were mixed to prepare an aerosol product.

(Examples 2 to 15, Comparative Examples 1 to 4)
The stock solution was prepared by the same method as in Example 1 except that the formulation of the undiluted solution was changed to the formulation shown in Table 1, and the aerosol composition for hair was prepared according to the formulation shown in Table 2 and filled in the aerosol container. Then, an aerosol product was prepared.

Using the aerosol products prepared in Examples 1 to 15 and Comparative Examples 1 to 4, solubility, spread of spray particles, set holding power and set hardness were measured by the following evaluation methods. The results are shown in Table 2.

<Solubility>
A transparent pressure-resistant glass aerosol container was filled with an aerosol composition for hair. The aerosol product was stored in a freezer at −20 ° C. for 24 hours and the low temperature solubility was evaluated according to the following evaluation criteria.
(Evaluation criteria)
◯: The liquid phase of the aerosol composition for hair was transparent and uniform without resin precipitates or turbidity.
X: The liquid phase of the aerosol composition for hair had resin precipitates and turbidity.

<Spreading of spray particles>
The aerosol product was immersed in a constant temperature water bath at 25 ° C. for 1 hour, the aerosol composition for hair was adjusted to 25 ° C., the filter paper was placed at a distance of 15 cm from the injection hole, and the filter paper was sprayed perpendicularly to the filter paper for 1 second. The spread of the spray particles at the time (the vertical and horizontal sizes (cm) of the spray particles adhering to the filter paper) were measured.

<Set holding power>
Immerse the aerosol product in a constant temperature water bath at 25 ° C for 1 hour to adjust the aerosol composition for hair to 25 ° C, spray the aerosol composition for hair onto a 50 cm long hair bundle, and wrap it around a curler until it dries. rice field. The dried hair bundle was hung, and the length (L) of the initial hair bundle suspended and the length (l) of the hair bundle after 24 hours were measured, and how much the curl of the hair bundle was after 24 hours. Whether it was held (set holding force) was calculated based on the formula defined below, and evaluated according to the following evaluation criteria.
Set holding power (%) = (50-l) / (50-L) x 100
(Evaluation criteria)
⊚: The set holding force was 55% or more from the length of the initial hair bundle suspended.
◯: The set holding force was 45% or more and less than 55% from the length of the initial hair bundle suspended.
X: The set holding force was less than 45% from the length of the initial suspended hair bundle.

<Hardness of set>
The aerosol product was immersed in a constant temperature water bath at 25 ° C. for 1 hour to adjust the aerosol composition for hair to 25 ° C., and the aerosol composition for hair was sprayed onto a hair bundle having a length of 10 cm and dried. A load was applied to the dried hair bundle from the vertical direction, and the load when the hair bundle was bent by 10 mm was measured and evaluated according to the following evaluation criteria.
(Evaluation criteria)
⊚: The load required to bend the hair bundle was 15 N or more.
◯: The load required to bend the hair bundle was 10 N or more and less than 15 N.
Δ: The load required to bend the hair bundle was less than 10 N.

As shown in Table 2, in the aerosol compositions for hair in the aerosol products of Examples 1 to 15, the styling resin was stably dissolved even at a low temperature, and a uniform composition was obtained. Further, the aerosol composition for hair in the aerosol products of Examples 3 to 15 having a mass ratio of 1/20 to 14/25 between the styling resin and the hydrofluoroolefin having a boiling point of 5 to 40 ° C. spreads spray particles. It was big. Further, as the liquefied gas having a boiling point of less than 5 ° C., a hydrofluoroolefin having a boiling point of less than 5 ° C. is used, and the mass ratio of the resin to the hydrofluoroolefin having a boiling point of less than 5 ° C. is 1/12 to 7 The aerosol composition for hair in the aerosol products of Examples 2 and 4 to 11 of / 15 was very excellent in set holding power and set hardness. In addition, the aerosol composition for hair in the aerosol products of Examples 12 to 15 in which a part or all of the hydrofluoroolefin having a boiling point of less than 5 ° C. was LPG or DME had a very excellent set holding power. On the other hand, among Comparative Examples 1 to 3 containing no hydrofluoroolefin having a boiling point of 5 to 40 ° C., the aerosols of Comparative Example 1 in which the liquefied gas having a boiling point of less than 5 ° C. is hydrofluoroolefin and Comparative Example 2 in which LPG is used. The aerosol composition for hair in the product had poor solubility and a precipitate was formed. The aerosol composition for hair in the aerosol product of Comparative Example 3 using a liquefied gas having a boiling point of less than 5 ° C as DME, which does not contain a hydrofluoroolefin having a boiling point of 5 to 40 ° C, has a solubility and a set hardness. It was good, but the spread of the spray particles was small and the set holding power was poor. In Comparative Example 4 in which a hydrofluoroolefin having a boiling point of 5 to 40 ° C. was used as isopentane, the solubility was poor and a precipitate was formed.

Claims (8)

An aerosol composition for hair containing a stock solution containing a styling resin and an alcohol, a hydrofluoroolefin having a boiling point of 5 to 40 ° C., and a liquefied gas having a boiling point of less than 5 ° C. to form a uniform phase. The aerosol composition for hair according to claim 1, wherein the content (solid content) of the styling resin is 5 to 30% by mass in the undiluted solution. The hair aerosol composition according to claim 1 or 2, wherein the content of the hydrofluoroolefin having a boiling point of 5 to 40 ° C. is 5 to 70% by mass in the hair aerosol composition. The hair aerosol composition according to any one of claims 1 to 3, wherein the content of the liquefied gas having a boiling point of less than 5 ° C. is 10 to 60% by mass in the hair aerosol composition. The hair aerosol composition according to any one of claims 1 to 4, wherein the liquefied gas having a boiling point of less than 5 ° C. contains a hydrofluoroolefin having a boiling point of less than 5 ° C. The liquefied gas having a boiling point of less than 5 ° C. contains a hydrofluoroolefin having a boiling point of less than 5 ° C.
The hair aerosol composition according to any one of claims 1 to 5, wherein the content of the hydrofluoroolefin having a boiling point of less than 5 ° C. is 5 to 60% by mass in the hair aerosol composition. The liquefied gas having a boiling point of less than 5 ° C. contains a hydrofluoroolefin having a boiling point of less than 5 ° C.
The ratio (mass ratio) of the content of the styling resin to the hydrofluoroolefin having a boiling point of less than 5 ° C. in the hair aerosol composition is 1/15 to 4/5, claims 1 to 1. 6. The aerosol composition for hair according to any one of 6. The ratio (mass ratio) of the content of the styling resin to the hydrofluoroolefin having a boiling point of 5 to 40 ° C. in the hair aerosol composition is 1/30 to 2/1, claim 1. The aerosol composition for hair according to any one of 7 to 7.