JP7120803B2 - Foam forming aerosol composition - Google Patents

Description

The present invention relates to foam-forming aerosol compositions, and more particularly to foam-forming aerosol compositions containing carbon dioxide and suitable for skin cleansing.

Conventionally, cleaning compositions used as skin cleansers and the like contain a surfactant as a cleansing component, and are usually used by rubbing both hands together to form a foam (see, for example, Patent Document 1). Since such a cleaning composition needs to be foamed manually, it takes a long time to create fine foam. In addition, it is said that the foam produced by manual lathering has a very thin liquid film, and as a result, the foam flows at the application site, or defoaming occurs during cleansing massage (for example, facial cleansing massage, etc.). There's a problem.

For the purpose of easily forming foam, it has been proposed to use an aerosol formulation for cleaning compositions.
One type of cleaning aerosol composition contains two different surfactants, water, a polyol, liquefied petroleum gas, and carbon dioxide, and produces a foamy discharge. The resulting foam-forming aerosol compositions are disclosed, for example, in US Pat.
However, in a foam-forming aerosol composition containing liquefied petroleum gas, especially when the vapor pressure of liquefied petroleum gas is high, the foam forming the foam expands greatly in the extruded matter. is not obtained.

Another cleaning aerosol composition is a foam-forming aerosol composition containing two types of surfactants with different HLB values, a polyol, and carbon dioxide gas, and capable of obtaining a foamy discharge. (See Patent Document 4, for example).
However, in a foam-forming aerosol composition that does not contain liquefied petroleum gas and contains only carbon dioxide, foams having a smaller bubble diameter (cell diameter) than a foam-forming aerosol composition that contains liquefied petroleum gas. is formed, but the foam does not have sufficient stability. Specifically, for example, when a cleansing massage (face cleansing massage) is performed on an application site, there is a risk that foam may flow or disappear.

Japanese Unexamined Patent Application Publication No. 2014-109003 JP 2012-240985 A JP 2012-240986 A JP 2016-17052 A

The present invention has been made based on the above circumstances, and an object thereof is to provide a carbon dioxide-containing foam-forming aerosol in which creamy foam is formed and the formed foam has high stability. The object is to provide a composition.
Another object of the present invention is a carbon dioxide-containing skin cleansing agent that forms a creamy foam, does not flow, has high stability, and provides a good feeling of use. to provide a foam-forming aerosol composition.

The foam-forming aerosol composition of the present invention is a foam-forming aerosol composition to be filled in an aerosol container comprising a pressure-resistant container equipped with an aerosol valve,
It consists of a stock solution component and a gas component that is discharged as a gas or is vaporized and becomes a gas,
The stock solution component contains water, a polyol and a surfactant,
The gas component consists of a specific hydrocarbon consisting of at least one of n-butane, isobutane, pentane and propane, and carbon dioxide,
The ratio of carbon dioxide in the entire aerosol composition is 0.1 to 2.5% by mass, and the ratio of the specific hydrocarbon is 1.0 to 10.0% by mass,
The ratio of the polyol in the stock solution component is 10.0 to 25.0% by mass,
The surfactant is an anionic surfactant with a ratio of 4.0 to 10.0% by mass in the stock solution component and a nonionic surfactant with a ratio of 6.0 to 10.0 % by mass in the stock solution component. consist of
The anionic surfactant is an amino acid surfactant, the nonionic surfactant is an alkyl glucoside surfactant,
The value of the ratio (nonionic surfactant/anionic surfactant) of the ratio of the anionic surfactant to the ratio of the nonionic surfactant in the stock solution component is 0.95 to 2.5. It is characterized by

In the foam-forming aerosol composition of the present invention, the ratio of carbon dioxide is 0.5 to 1.5% by mass and the ratio of the specific hydrocarbon is 3.0 to 7.0% by mass in the entire aerosol composition. and
The ratio of the polyol in the stock solution component is 12.0 to 20.0% by mass,
It is preferable that the ratio of the anionic surfactant in the stock solution component is 5.0 to 8.0% by mass, and the ratio of the nonionic surfactant in the stock solution component is 6.0 to 7.0% by mass. .

In the foam-forming aerosol composition of the present invention, the anionic surfactant is preferably an N-acylglutamic acid-type surfactant.

In the foam-forming aerosol compositions of the invention, it is preferred that the polyols consist of diols and triols.

In the foam-forming aerosol composition of the present invention, it is preferable that the proportion of propane in the gas component is 0.5% by mass or less.

In the foam-forming aerosol composition of the present invention, it is preferred that the proportion of pentane in the total aerosol composition is less than 2% by weight.

The foam-forming aerosol composition of the present invention preferably contains the gas component so that the product internal pressure at 35° C. is 0.2 to 0.8 MPa.

In the foam-forming aerosol composition of the present invention, a specific hydrocarbon and carbon dioxide are used in combination as gas components, and the undiluted solution component contains a polyol and a surfactant. Surfactants and nonionic surfactants are used in combination, and these specific hydrocarbons, carbon dioxide, polyols, anionic surfactants and nonionic surfactants are contained in specific proportions. Therefore, even if carbon dioxide is contained, the emulsifying action of the surfactant is sufficiently exhibited, so that good foam formation is obtained, and the formed foam is composed of carbon dioxide and the specific hydrocarbon. The combination of surfactants and polyols results in a creamy foam with high stability without running at the application site.
Therefore, according to the foam-forming aerosol composition of the present invention, in a foam-forming aerosol composition containing carbon dioxide as a gas component, a creamy foam is formed and the formed foam has high stability.
In addition, in the foam-forming aerosol composition of the present invention, since the stock solution component contains a polyol in a specific ratio, when used for the human body, it does not give a sticky feeling, and it is moist and good. It is possible to obtain a feeling of use, and therefore it can be suitably used for skin cleansing.

In addition, in the foam-forming aerosol composition of the present invention, carbon dioxide is contained by using an amino acid-based surfactant as an anionic surfactant and using an alkyl glucoside-based surfactant as a nonionic surfactant. It is possible to suppress the generation of precipitates in the liquid phase of the composition due to the presence of the surfactant, and when used for the human body, there is no skin irritation caused by the surfactant, resulting in a better feeling of use. can be obtained.

The foam-forming aerosol composition of the present invention comprises an undiluted liquid component and a gas component that is expelled as a gas or is vaporized into a gas after being expelled, and is placed in an aerosol container comprising a pressure-resistant container equipped with an aerosol valve. It is filled to be an aerosol product.
In the foam-forming aerosol composition of the present invention, the stock solution component contains water, a polyol and a surfactant, and the surfactant consists of an anionic surfactant and a nonionic surfactant. On the other hand, the gas component consists of specific hydrocarbons consisting of at least one of n-butane, isobutane, pentane and propane, and carbon dioxide, and acts as a propellant and a foam-forming gas.
The foam-forming aerosol composition of the present invention is used for the human body, and specifically, is preferably used for cleaning the skin.

The concentrate components and gas components that make up the foam-forming aerosol composition of the present invention are described below.

[Undiluted solution]
The stock solution component constitutes the liquid phase of the composition and contains water, a polyol, and a surfactant as essential constituents, the proportion of the polyol is 10.0 to 25.0% by mass, and the The surfactant consists of 4.0 to 10.0% by mass of an anionic surfactant and 3.0 to 10.0% by mass of a nonionic surfactant. That is, the stock solution components are water, 10.0 to 25.0% by mass of polyol, 4.0 to 10.0% by mass of anionic surfactant, and 3.0 to 10.0% by mass of nonionic surfactant. %.

(water)
Purified water is used as the water constituting the stock solution component.

The ratio of water is appropriately determined according to the ratio of the other components that should constitute the concentrate component, and in consideration of the intended use of the composition.

(polyol)
The polyol, which constitutes the stock solution component, has a favorable foam-forming action in cooperation with the surfactant and the specific hydrocarbon and carbon dioxide which constitute the gas component, and also contributes to the formation of the foam-forming aerosol composition of the present invention. When used for the human body, it exhibits a moisturizing effect at the application site.
Here, the preferable foam specifically means a foam having a fine texture, a creamy foam quality with elasticity and stickiness, and a highly stable elongation that does not cause defoaming or flow at the application site. It shows good foam.

As the polyol, it is preferable to use a combination of a diol and a triol.
By using diols and triols in combination, more favorable foams can be formed.

Specific examples of diols include 1,3-butylene glycol, ethylene glycol, diethylene glycol, hexylene glycol, polyethylene glycol, propylene glycol, dipropylene glycol, polypropylene glycol and isoprene glycol.
Specific examples of triols include glycerin.
It is preferable to use 1,3-butylene glycol and glycerin in combination as the polyol in the foam-forming aerosol composition of the present invention.

Further, when a diol and a triol are used in combination as the polyol, the quantitative ratio of the diol and the triol in the stock solution component, that is, the ratio of the ratio of the diol to the ratio of the triol in the stock solution component (triol/diol) is , is preferably 0.7 to 1.5, more preferably 0.7 to 1.0.

The proportion of polyol is 10.0 to 25.0% by mass, preferably 12.0 to 20.0% by mass, in the stock solution.

If the proportion of polyol is too high, the liquid phase may not be uniform. In addition, creamy foam cannot be obtained, and defoaming may occur, resulting in insufficient stability of the foam. Alternatively, the discharge may not be foamy. In addition, when used for the human body, there is a possibility that a sticky feeling or the like may occur, making it impossible to obtain a good feeling of use.
On the other hand, if the proportion of polyol is too small, a creamy foam cannot be obtained, and the foam may not have sufficient stability. Specifically, it may not be possible to obtain creamy and stretchy foam. In addition, when used for the human body, there is a possibility that a good moist feeling cannot be obtained.

(Surfactant)
The surfactant constituting the stock solution component is composed of an anionic surfactant and a nonionic surfactant.
In the foam-forming aerosol composition of the present invention, as surfactants, an anionic surfactant having a high detergency and a nonionic surfactant less susceptible to carbon dioxide are used in combination to reduce the amount of carbon dioxide. In the presence of the surfactant, the emulsifying action is sufficiently exhibited, so good foam having sufficient cleaning action is formed.

In addition, in the surfactant, the ratio of the anionic surfactant and the nonionic surfactant in the stock solution component, that is, the ratio of the ratio of the anionic surfactant to the ratio of the nonionic surfactant in the stock solution component ( The nonionic surfactant/anionic surfactant) value is preferably 0.3 to 2.5, more preferably 0.5 to 1.5.

(Anionic surfactant)
An amino acid surfactant is used as an anionic surfactant.
By using an amino acid-based surfactant as an anionic surfactant, particularly when used for the human body, it is possible to suppress the occurrence of skin irritation caused by the surfactant and obtain a good feeling during use.

N-acylglutamic acid-type surfactants are preferably used as amino acid-based surfactants constituting anionic surfactants.
By using an N-acylglutamic acid type surfactant as an anionic surfactant, it is possible to suppress the generation of deposits due to the inclusion of carbon dioxide. Specifically, when a fatty acid-based surfactant is used as an anionic surfactant, the fatty acid-based surfactant is alkaline, so that it reacts with carbon dioxide in the liquid phase of the composition to form a fatty acid. Although there is a problem that the salt aggregates and precipitates, when an N-acylglutamic acid type surfactant is used as an anionic surfactant, the N-acylglutamic acid type surfactant is weakly acidic. No deposits are formed. In addition, especially when used for the human body, it is possible to obtain a better moist feeling in use.

As the N-acylglutamic acid type surfactant constituting the anionic surfactant, potassium cocoyl glutamate (potassium N-coconut fatty acid acyl-L-glutamate) is preferable from the viewpoint of solubility in water.
Further, the N-acylglutamic acid type surfactants constituting the anionic surfactants include triethanolamine N-coconut fatty acid acyl-L-glutamic acid, sodium N-coconut fatty acid acyl-L-glutamate, and N-lauroyl. - triethanolamine L-glutamate, potassium N-lauroyl-L-glutamate, sodium N-lauroyl-L-glutamate, potassium N-myristoyl-L-glutamate, sodium N-myristoyl-L-glutamate and N-stearoyl-L- Sodium glutamate and the like can also be used.

The proportion of the anionic surfactant is 4.0 to 10.0% by mass, preferably 5.0 to 8.0% by mass, in the stock solution components.

If the proportion of the anionic surfactant is too high, the discharge may not be foamy.
On the other hand, if the proportion of the anionic surfactant is too small, a creamy foam cannot be obtained, and the foam may not have sufficient stability. Alternatively, the discharge may not be foamy.

(Nonionic surfactant)
Alkyl glucoside surfactants are used as nonionic surfactants.
By using an alkyl glucoside-based surfactant as a nonionic surfactant, good foam-forming properties can be obtained, and thus better foam can be obtained. In addition, particularly when used for the human body, a superior cleansing action can be obtained, and the occurrence of skin irritation caused by the surfactant can be suppressed, resulting in a good feeling of use.

Lauryl glucoside is preferably used as the alkyl glucoside surfactant constituting the nonionic surfactant from the viewpoint of foam-forming properties and low skin irritation.
Moreover, octyl glucoside, nonyl glucoside, decyl glucoside, myristyl glucoside, palmityl glucoside and the like can also be used as alkyl glucoside surfactants constituting nonionic surfactants.

The ratio of the nonionic surfactant is 3.0 to 10.0% by mass, preferably 4.0 to 7.0% by mass, in the stock solution.

If the proportion of the nonionic surfactant is too high, the discharge may not become foamy. In addition, when used for the human body, there is a possibility that a sticky feeling or the like may occur, making it impossible to obtain a good feeling of use.
On the other hand, if the proportion of the nonionic surfactant is too small, the liquid phase of the composition may not be uniform. Also, a creamy foam cannot be obtained, and the foam may not have sufficient stability. Alternatively, the discharge may not be foamy.

(Optional component)
In the foam-forming aerosol composition of the present invention, the concentrate component may contain optional constituents as necessary, in addition to the essential constituents (specifically, water, polyol, surfactant). Specific examples of optional components include thickeners such as xanthan gum, preservatives such as phenoxyethanol, moisturizing agents such as hyaluronic acid, and fragrances.

In the foam-forming aerosol composition composed of the essential constituents and optional constituents as described above, the viscosity of the stock solution component at a temperature of 20°C is preferably 30 to 1000 mPa·s.
If the viscosity of the stock solution component is too high, it may not be possible to obtain good ejection characteristics. In addition, there is a possibility that the foam formed as a discharge may not have a creamy foam quality and sufficient spreadability. Moreover, especially when it is used for the human body, there is a possibility that a sticky feeling may occur and a good feeling of use may not be obtained.
On the other hand, if the viscosity of the concentrate component is too low, good ejection characteristics cannot be obtained, so there is a risk that the ejected matter will not be foamy.

[Gas component]
The gas component is carbon dioxide and a specific hydrocarbon consisting of at least one of n-butane, isobutane, pentane and propane, and the proportion of the specific hydrocarbon in the foam-forming aerosol composition is 1.0 to 10.0% by mass. and wherein the proportion of carbon dioxide in the foam-forming aerosol composition is 0.1-2.5% by weight.

(specific hydrocarbon)
Part of the specific hydrocarbon that constitutes the gas component is dissolved in the polyol to form a liquid phase together with the stock solution component, and the other part is carbon dioxide (specifically, part of carbon dioxide). It forms a gas phase (propellant).

The specific hydrocarbon is at least one of n-butane, isobutane, pentane and propane, preferably at least one of n-butane and isobutane.
To explain the reason, from the viewpoint of the foam quality of the foam (discharge), it is preferable that the specific hydrocarbon constituting the gas component does not contain a high proportion of propane, which has a high vapor pressure. The ratio of propane in the gas component (permissible content) is 0.5% by mass or less, preferably 0.1% by mass or less. Further, by setting the proportion of propane in the gas component to 0.5% by mass or less, creamy foam can be obtained in the discharge.
In addition, from the viewpoint of suppressing skin irritation, since pentane has skin irritation and causes skin irritation due to being a low boiling point organic gas, the foam-forming aerosol composition as a whole is preferably less than 2% by weight of pentane.
The vapor pressures of n-butane, isobutane, pentane, and propane, which constitute the specific hydrocarbons, are 0.12 MPa at a temperature of 20°C for n-butane and 0.12 MPa for isobutane at a temperature of 20°C. The pressure is 0.21 MPa, the vapor pressure of pentane (specifically, isopentane) at a temperature of 20°C is 0.08 MPa, and the vapor pressure of propane at a temperature of 20°C is 0.75 MPa.

The proportion of specific hydrocarbons is 1.0 to 10.0% by weight, preferably 3.0 to 7.0% by weight, in the entire foam-forming aerosol composition.

If the ratio of the specific hydrocarbon is too large, the bubbles expand greatly and the bubble diameter (bubble diameter) becomes excessively large, creamy foam cannot be obtained, and the bubbles that make up the foam burst. It may become a thing.
On the other hand, if the ratio of the specific hydrocarbon is too small, creamy foam cannot be obtained, and the foam may not have sufficient stability. Alternatively, the discharge may not be foamy.

(carbon dioxide)
Carbon dioxide gas, which constitutes the gas component, is soluble in water. forms a gas phase (propellant) together with a part of the specific hydrocarbon).

The proportion of carbon dioxide is between 0.1 and 2.5% by weight, preferably between 0.5 and 1.5% by weight in the total foam-forming aerosol composition.

If the proportion of carbon dioxide is too high, a creamy foam may not be obtained and the foam may not have sufficient stability.
On the other hand, if the proportion of carbon dioxide is too small, a creamy foam cannot be obtained, and the foam may not have sufficient stability. In addition, especially when carbon dioxide is not contained, that is, when the gas component consists only of specific hydrocarbons, the specific hydrocarbons have a low vapor pressure, so good discharge characteristics can be obtained in a low-temperature environment. You may not get it.

In the foam-forming aerosol composition of the present invention, the gas component is preferably contained so that the internal pressure of the product in the aerosol container is within the desired range.
Here, in the foam-forming aerosol composition of the present invention, the product internal pressure of the aerosol container at a temperature of 35° C. is preferably 0.8 MPa or less, more preferably 0.2 to 0.8 MPa, and 0 .3 to 0.7 MPa is particularly preferred.
If the internal pressure of the product is too high, there is a possibility that sufficient safety cannot be obtained.
Therefore, according to the product internal pressure of 0.2 to 0.8 MPa at the temperature of 35 ° C. of the aerosol container, sufficient safety required for the aerosol product can be obtained and good foam is formed. be able to.

The foam-forming aerosol composition of the present invention having such a structure can be produced by filling the undiluted liquid component and the gas component into an aerosol container.

In such a foam-forming aerosol composition of the present invention, the specific hydrocarbon and carbon dioxide are used in combination as gas components. In addition, the concentrate component contains a polyol and a surfactant, and as the surfactant, an anionic surfactant and a nonionic surfactant are used in combination. Specific hydrocarbons, carbon dioxide, polyols, anionic surfactants and nonionic surfactants are contained in specific proportions. Therefore, even if carbon dioxide is contained, the emulsifying action of the surfactant is sufficiently exhibited, so that good foam formation is obtained, and the formed foam is composed of carbon dioxide and the specific hydrocarbon. The surfactant and polyol work together to create fine-textured, elastic, sticky, and creamy foam. become a thing.
Therefore, according to the foam-forming aerosol composition of the present invention, in a foam-forming aerosol composition containing carbon dioxide as a gas component, a creamy foam is formed and the formed foam has high stability.
In addition, in the foam-forming aerosol composition of the present invention, since the stock solution component contains a polyol in a specific ratio, when used for the human body, it does not give a sticky feeling, and it is moist and good. It is possible to obtain a feeling of use, and therefore it can be suitably used for skin cleansing. Moreover, when it is used for the human body, since it contains carbon dioxide, it can be expected that the carbon dioxide will promote blood circulation at the application site.

In addition, in the foam-forming aerosol composition of the present invention, carbon dioxide is contained by using an amino acid-based surfactant as an anionic surfactant and using an alkyl glucoside-based surfactant as a nonionic surfactant. It is possible to suppress the generation of precipitates in the liquid phase of the composition due to the presence of the surfactant, and when used for the human body, there is no skin irritation caused by the surfactant, resulting in a better feeling of use. can be obtained.

In addition, in the foam-forming aerosol composition of the present invention, by setting the proportion of propane in the gas component to 0.5% by mass or less, it is possible to obtain even creamier foam in the discharge.

In addition, in the foam-forming aerosol composition of the present invention, by making the proportion of pentane in the entire aerosol composition less than 2% by mass, when the aerosol composition is used for the human body, it is possible to prevent skin irritation at the application site. The occurrence can be sufficiently suppressed.

Examples of the present invention will be described below, but the present invention is not limited to these.

[Examples 1 to 11, Reference Example 1 and Comparative Examples 1 to 7]
First, the composition materials shown in Tables 1 and 2 were prepared, and the stock solution components among the composition materials were mixed at the ratios shown in Tables 1 and 2 to prepare the stock solution components. The viscosity at 20° C. was measured for the obtained stock solution components. Results are shown in Tables 1 and 2.
Next, the obtained undiluted solution components and gas component materials were placed in an aerosol container made of a glass transparent pressure-resistant container equipped with an aerosol valve in the proportions shown in Tables 1 and 2, and the mass of the content was 50 g. An aerosol product for evaluation was produced by filling such that
The internal pressure of the obtained aerosol product for evaluation was within the range of 0.2 to 0.8 MPa at a temperature of 35°C.
Each of the obtained aerosol products for evaluation was evaluated as follows. Results are shown in Tables 1 and 2.

(Confirmation test of state of composition)
For the obtained aerosol product for evaluation, the uniformity of the liquid phase of the composition in the aerosol container (specifically, the presence or absence of precipitates and crystals, and the presence or absence of separation) was visually confirmed immediately after production. And it evaluated according to the following evaluation criteria, and it was set as disqualified when evaluation was the following "C".

(Evaluation criteria for state of composition)
"A": When none of the occurrence of precipitates, crystals, and separation was confirmed "B": When any one of the occurrence of precipitates, crystals, and separation was confirmed "C ”: When two or more of precipitate generation, crystal generation, and separation are confirmed

(Usage confirmation test)
A sensory test was conducted on the obtained aerosol product for evaluation by having 10 panelists discharge the aerosol product for evaluation onto the skin and confirm whether or not there was a sticky feeling. Then, it was evaluated according to the following evaluation criteria, and the case where the evaluation was either "1" or "2" below was regarded as unacceptable.

(Evaluation criteria for usability)
"5": When 9 or more panelists determined that there was no stickiness "4": When 7 or more and less than 9 panelists determined that there was no stickiness "3": Determined that there was no stickiness If the number of panelists was 5 or more and less than 7 "2": If the number of panelists who judged that there was no stickiness was 3 or more and less than 5 "1": Less than 3 panelists judged that there was no stickiness if was

(Foam specific gravity measurement test)
For the obtained aerosol product for evaluation, under room temperature conditions, a foam specific gravity cup (semispherical glass cup with a top lid) is filled with a discharge (foamy discharge), and the mass of the discharge in the foam specific gravity cup was measured and the specific gravity of the foam was calculated. Then, based on the obtained foam specific gravity value, evaluation was performed according to the following evaluation criteria, and a case where the evaluation was "2" was regarded as unacceptable.
The foam specific gravity value measured in this foam specific gravity measurement test is one of the indicators of the creaminess of foam.

(Evaluation criteria for foam specific gravity)
"5": When the foam specific gravity value of the discharge is 0.06 g/mL or more and 0.1 g/mL or less "4": The foam specific gravity value of the discharge is 0.02 g/mL or more and less than 0.06 g/mL If "3": When the foam specific gravity value of the discharge was 0.01 g / mL or more and less than 0.02 g / mL "2": The foam specific gravity value of the discharge exceeded 0.1 g / mL or if it was less than 0.01 g/mL

(Skin irritation confirmation test)
For the obtained aerosol product for evaluation, the aerosol product for evaluation was applied to 10 panelists by discharging it onto their arms, and after 5 minutes had passed, the evaluator confirmed the presence or absence of redness at the application site, thereby causing skin irritation. A test was conducted to confirm the presence or absence of Then, it was evaluated according to the following evaluation criteria, and the case where the evaluation was either "1" or "2" below was regarded as unacceptable.

(Evaluation criteria for skin irritation)
"5": When there were 9 or more panelists who were determined to have no skin irritation "4": When there were 7 or more and less than 9 panelists who were determined to have no skin irritation "3": No skin irritation If the panelists were determined to be 5 or more and less than 7 "2": If the panelists determined to have no skin irritation were 3 or more and less than 5 "1": It was determined that there was no skin irritation If there are less than 3 panelists

In Table 2, since the aerosol product for evaluation according to Comparative Example 2 could not obtain a foamy discharge, the foam specific gravity could not be measured. In addition, the evaluation aerosol product according to Comparative Example 2 was not subjected to the measurement of the viscosity of the undiluted solution components and the confirmation test for skin irritation.
In addition, in the aerosol product for evaluation of Comparative Example 3, since separation was observed in the liquid phase of the composition, the state of the composition was evaluated as "B".

From the above results, according to the aerosol compositions of the present invention according to Examples 1 to 11 of the present invention, creamy foam is formed, and good feeling of use without stickiness and skin irritation can be obtained. It was confirmed that

In the usability confirmation test, the evaluation aerosol products according to Examples 1 to 11 were asked to check the state of the discharge when discharged on the skin, and the state of elongation of the discharge and the elongation of the discharge. When asked to confirm the state of the ejected matter in the state and the presence or absence of flow from the application point, more than half of the panelists said that the ejected matter was fine in any of the evaluation aerosol products. It was determined that the foam had good spreadability without defoaming or flowing.
From the above results, according to the aerosol compositions of the present invention according to Examples 1 to 11 according to the present invention, creamy foam is formed, and the formed foam has high stability. confirmed.

Claims (7)

A foam-forming aerosol composition to be filled in an aerosol container comprising a pressure-resistant container equipped with an aerosol valve,
It consists of a stock solution component and a gas component that is discharged as a gas or is vaporized and becomes a gas,
The stock solution component contains water, a polyol and a surfactant,
The gas component consists of a specific hydrocarbon consisting of at least one of n-butane, isobutane, pentane and propane, and carbon dioxide,
The ratio of carbon dioxide in the entire aerosol composition is 0.1 to 2.5% by mass, and the ratio of the specific hydrocarbon is 1.0 to 10.0% by mass,
The ratio of the polyol in the stock solution component is 10.0 to 25.0% by mass,
The surfactant is an anionic surfactant with a ratio of 4.0 to 10.0% by mass in the stock solution component and a nonionic surfactant with a ratio of 6.0 to 10.0 % by mass in the stock solution component. consist of
The anionic surfactant is an amino acid surfactant, the nonionic surfactant is an alkyl glucoside surfactant,
The value of the ratio (nonionic surfactant/anionic surfactant) of the ratio of the anionic surfactant to the ratio of the nonionic surfactant in the stock solution component is 0.95 to 2.5. A foam-forming aerosol composition, characterized in that: The ratio of carbon dioxide in the entire aerosol composition is 0.5 to 1.5% by mass, and the ratio of the specific hydrocarbon is 3.0 to 7.0% by mass,
The ratio of the polyol in the stock solution component is 12.0 to 20.0% by mass,
The ratio of the anionic surfactant in the stock solution component is 5.0 to 8.0% by mass, and the ratio of the nonionic surfactant in the stock solution component is 6.0 to 7.0% by mass. 2. The foam-forming aerosol composition of claim 1. 3. A foam-forming aerosol composition according to claim 1 or claim 2, wherein the anionic surfactant is an N-acylglutamic acid type surfactant. A foam-forming aerosol composition according to any one of claims 1 to 3, characterized in that the polyols consist of diols and triols. A foam-forming aerosol composition according to any one of claims 1 to 4, characterized in that the proportion of propane in the gas component is 0.5% by weight or less. A foam-forming aerosol composition according to any preceding claim, wherein the proportion of pentane in the total aerosol composition is less than 2% by weight. The foam-forming aerosol composition according to any one of claims 1 to 6, wherein the gas component is contained so that the product internal pressure at 35°C is 0.2 to 0.8 MPa.