JP7356155B2 - Foamy aerosol warming skin cleansing composition - Google Patents

Description

The present invention relates to a foamy aerosol warming skin cleansing composition that is discharged from an aerosol container and becomes foamy, and in particular utilizes moisture adhering to the skin during washing, and has a warming sensation due to the heat of hydration. The present invention relates to a foamy aerosol warming skin cleansing composition.

Foamy cosmetics have higher permeability and less stress on the skin than non-foamy cosmetics, and have traditionally been used as skin cleansing cosmetics such as face washes and hair cosmetics. There is. Foamy cosmetics are desired for other uses as well, but simply filling an aerosol container with a non-foaming cosmetic liquid and a propellant and discharging it will not produce foam; instead, it will be discharged in liquid form. There was a problem that the stock solution separated.

In addition, in recent years, various products that have a warming effect when used, such as hot cleansers and hot massage gels, have been developed with the aim of improving the feeling of use due to the warming effect, and improving the massage effect and cleaning effect by promoting blood circulation through the warming effect. Warming cosmetics have been proposed. Many warming cosmetics generate heat using the heat of hydration, but these warming cosmetics contain almost no water in order to make full use of the heat of hydration, so they do not foam easily. There were problems of poor elongation and unstable stability over time.

On the other hand, foam-like cosmetics with a warming sensation have been considered, but conventionally, in order to form a sufficient foam, it is necessary to contain a relatively large amount of water, and the warming effect due to the heat of hydration is insufficient. I couldn't say yes.
As an aerosol composition that does not contain water and provides a warming sensation, Patent Document 1 discloses a hydrated pyrogen, an oil, a surfactant, and/or a higher alcohol, which can be suitably used as a foamy cleansing agent or shaving foam. , and an aerosol composition comprising a propellant. However, the aerosol composition described in Patent Document 1 cannot be sufficiently foamed again after being ejected in the form of a foam, and defoaming occurs quickly, so the composition tends to drip, making it difficult to use. Furthermore, since the aerosol composition described in Patent Document 1 does not contain water, its stability over time is unstable, and there have been problems such as separation of the stock solution after storage.

Japanese Patent Application Publication No. 2001-323258

The present invention was developed in view of the problems of the prior art described above, and has a warming effect, is discharged from an aerosol container to form a good foam, and is foamed again after being discharged in a foam shape. It is an object of the present invention to provide a foamy aerosol warm-sensing skin cleansing composition that has re-foaming properties that allow it to re-foam, and also has excellent stability over time.

In order to solve the above problems, the foamy aerosol thermal skin cleansing composition of the present invention is a foamy aerosol thermal skin cleansing composition containing a stock solution and a propellant, wherein the stock solution is (A ) 40% by mass or more and 95% by mass or less of a hydrated pyrogenic substance, (B) 0.1% by mass or more and 10% by mass or less of a surfactant that is solid at room temperature, (C) an amphiphilic ester that is liquid at room temperature. It is characterized by containing oil at 0.1% by mass or more and 8% by mass or less, (D) higher alcohol at 0.1% by mass or more and 8% by mass or less, and (E) water at 0% by mass or more and 5% by mass or less. shall be.

It is preferable that the hydration exothermic substance (A) is a polyhydric alcohol because this can further improve foaming.
Further, it is preferable that the hydrated pyrogenic substance (A) contains polyethylene glycol.

According to the present invention, it has a warming effect, becomes a good foam when discharged from an aerosol container, and has a re-foaming property that it can be foamed again after being discharged in a foam shape. Furthermore, it is possible to provide a foamy aerosol thermal skin cleansing composition that has excellent stability over time, which is a significant effect.

In addition, the foamy aerosol warming skin cleansing composition of the present invention tends to have a warming sensation due to the heat of hydration, and the warming effect improves the feeling of use, and the warming effect promotes blood circulation, resulting in a massage effect and cleaning effect. This has the effect of improving Furthermore, the foamy aerosol thermal skin cleansing composition of the present invention is stable over time, foams well when discharged, forms good foam, and can improve foam retention; It has a re-foaming property that allows it to be foamed again after it has been dispensed in the form of a foam, making it possible to further improve the sustainability of the foam, making it easier to spread and use, and with less stress on the skin. It has a remarkable effect.

Embodiments of the present invention will be described below, but these are shown by way of example, and it goes without saying that various modifications can be made without departing from the technical idea of the present invention.

The foamy aerosol warming skin cleansing composition of the present invention is a foamy aerosol warming skin cleansing composition containing a stock solution and a propellant, wherein the stock solution contains (A) a hydrated pyrogenic substance in an amount of 40% by mass. % or more and 95% by mass or less, (B) 0.1% or more of surfactant that is solid at room temperature and 10% or less by mass, (C) 0.1% or more of amphipathic ester oil that is liquid at room temperature 8 (D) higher alcohol in an amount of 0.1% by mass to 8% by mass; and (E) water in an amount of 0% by mass to 5% by mass.

The hydration exothermic substance (A) is used to obtain a warming effect by generating heat of hydration. There is no particular restriction as long as it generates heat, and any known component known in the field of cosmetics as a substance that generates heat of hydration can be used. As the hydration exothermic substance (A), organic compounds are suitable, but inorganic compounds such as zeolite and anhydrides of metal salts or metal oxides can also be used.

Examples of the organic compound used in the hydrated pyrogenic substance (A) include C2 to C8 alkylene glycols such as ethylene glycol, propylene glycol, 1,3-butylene glycol, amylene glycol, and hexylene glycol; C4 to C16 dialkylene glycols such as propylene glycol; di(alkylene) glycol mono(alkyl) ethers such as diethylene glycol monomethyl ether and diethylene glycol monoethyl ether; dialkylene having a C2 to C12 alkyl carbonyl group, aryl carbonyl group, etc. as a substituent Glycol derivatives (e.g. diethylene glycol diacetyl, diethylene glycol monobenzoyl, etc.); C3 to C9 aliphatic triols such as glycerin; polyethylene glycol (e.g. liquid with a number average molecular weight of 600 or less); polypropylene glycol (e.g. a number average molecular weight of 400 to 2000) degree); Examples include butyl monoethers of copolymers of ethylene oxide and propylene oxide. The alkylene moiety of di(alkylene)glycol mono(alkyl)ether is usually about C1 to C6. The alkyl moiety of di(alkylene)glycol mono(alkyl)ether is usually about C1 to C6. Among these, preferred are ethylene glycol, propylene glycol, glycerin, 1,3-butylene glycol, polyethylene glycol (particularly preferably a number average molecular weight of 400 or less), etc., from the viewpoint of improving foaming, and glycerin or More preferably, it is a polyhydric alcohol containing glycerin. (A) Hydration exothermic substances may be used alone or in combination of two or more.

The blending ratio of the hydrated pyrogenic substance (A) is 40% by mass or more and 95% by mass or less, preferably 60% by mass or more and 90% by mass or less, and 75% by mass or more and 90% by mass, based on 100% by mass of the stock solution. % or less is more preferable.

In the present invention, re-foaming properties can be obtained by blending the above-mentioned (B) surfactant that is solid at room temperature. Normally, the foam after discharge collapses when stretched, but by dispersing and blending the above-mentioned (B) surfactant, which is solid at room temperature, into the stock solution, the foam can be foamed again. and can further improve the sustainability of the foam.

As the above-mentioned (B) surfactant that is solid at room temperature, a wide range of known surfactants that are solid at room temperature (25°C) can be used, but it is preferable to use a powdered surfactant. be. By uniformly dispersing and blending the powdered surfactant into the stock solution, excellent re-foaming properties can be exhibited.

Examples of the surfactant (B) include nonionic surfactants that are solid at room temperature, anionic surfactants that are solid at room temperature, and amphoteric surfactants that are solid at room temperature. Preferred are sodium sarcosine, sodium lauryl sulfate, sodium cocoyl glyceryl sulfate, sodium olefin (C14-16) sulfonate, sodium cocoyl glutamate, and the like. The surfactant (B) may be used alone or in combination of two or more.

The blending ratio of the surfactant (B) is 0.1% by mass or more and 10% by mass or less, preferably 1% by mass or more and 7% by mass or less, and 3% by mass or more and 5% by mass, based on 100% by mass of the stock solution. % or less is more preferable.

As the amphiphilic ester oil (C) that is liquid at room temperature, a known ester oil that is liquid at room temperature (25° C.) and has both a hydrophilic group and a hydrophobic group can be used. In the present specification, liquid at normal temperature means one with a viscosity of 1 to 100,000 mPa·s at 25°C. By using the amphipathic ester oil (C) in a range of 0.1% by mass or more and 8% by mass or less, stability over time can be improved while maintaining the refoaming effect.

Specifically, the amphiphilic ester oil (C) includes bisethoxydiglycol cyclohexane-1,4-dicarboxylate, methylpentanediol dineopentanoate, diethylpentanediol dineopentanoate, bisethoxydiglycol succinate, and coconut oil. Preferred are oil glycereth-8 esters, argan oil glycereth-8 esters, almond oil glycereth-8 esters, jojoba oil glycereth-8 esters, and the like. The amphiphilic ester oil (C) may be used alone or in combination of two or more.

The blending ratio of the amphipathic ester oil (C) is 0.1% by mass or more and 8% by mass or less, preferably 1% by mass or more and 5% by mass or less, and 1% by mass or more, based on 100% by mass of the stock solution. More preferably, it is 3% by mass or less.

Examples of the higher alcohol (D) include straight chain or branched chain alcohols of about C6 to C24 (preferably about C12 to C20). The higher alcohol (D) is preferably a monohydric higher alcohol. The higher alcohol (D) may be a saturated alcohol or an unsaturated alcohol. Specifically, the higher alcohol (D) includes linear or branched saturated alcohols such as lauryl alcohol, myristyl alcohol, cetyl alcohol, stearyl alcohol, behenyl alcohol, arachyl alcohol, and behenyl alcohol; oleyl alcohol, linoleyl alcohol, etc. Examples include straight-chain or branched unsaturated straight-chain alcohols, with myristyl alcohol, cetyl alcohol, stearyl alcohol, aracyl alcohol, behenyl alcohol, and cetostearyl alcohol being preferred. The higher alcohol (D) may be used alone or in combination of two or more.

The blending ratio of the higher alcohol (D) is 0.1% by mass or more and 8% by mass or less, preferably 0.5% by mass or more and 6% by mass or less, and 1% by mass or more and 3% by mass or less, based on 100% by mass of the stock solution. It is more preferably less than % by mass. By blending the above (D) higher alcohol in a range of 0.1% by mass or more and 8% by mass or less, stability over time is maintained, foaming and foam retention are improved by thickening, and defoaming is made difficult. be able to.

The water (E) is preferably purified water.
In the composition of the present invention, the water (E) may not be included in the stock solution, that is, the water content may be 0% by mass based on 100% by mass of the stock solution, and may be in the range of 5% by mass or less ( E) It may contain water, but from the viewpoint of improving stability, it is preferable that it contains (E) water in a range of 1% by mass or more and 5% by mass or less, and 1% by mass or more and 3% by mass or less. It is more preferable that (E) water is contained in a range of not more than % by mass. (E) If the water content exceeds 5% by mass, a problem arises in that the sense of warmth is impaired.

In addition to the components (A) to (E) above, the stock solution contains components commonly used in cosmetics, such as thickeners, oils, anti-inflammatory agents, humectants, emulsifiers, alcohols, and powders. It is also possible to add substances such as antiseptics, preservatives, antioxidants, pigments, pH adjusters, film-forming agents, resins, ultraviolet absorbers, whitening agents, antibacterial agents, chelating agents, fragrances, and blood circulation promoters.

The viscosity of the stock solution is not particularly limited, but it is preferably 1 mPa·s to 1500 mPa·s at room temperature (25° C.) from the viewpoint of preventing foaming and dripping during discharge.

As the propellant, any known propellant used in aerosols can be used, but it is preferable to use one or more selected from LPG, dimethyl ether, chlorofluorocarbon, nitrogen, and carbon dioxide.

The mass ratio of the stock solution to the propellant is preferably in the range of stock solution/propellant = 80/20 to 97/3, more preferably in the range of 90/10 to 97/3. By setting it as the said range, separation of the stock solution and propellant and scattering at the time of discharge can be prevented, and a good foam can be formed.
Further, the internal pressure of the aerosol at 25°C is preferably 0.40 MPa to 0.65 MPa, more preferably 0.50 MPa to 0.60 MPa. The above range is effective for foam formation.

The foamy aerosol warming skin cleansing composition of the present invention contains a stock solution containing the above-mentioned components (A) to (E) within a predetermined range, and a propellant, and is placed in an aerosol container (pressure-resistant container). Manufactured by filling concentrate and propellant. The foamy aerosol warm skin cleansing composition filled in an aerosol container is suitably used as a warm skin cleansing cosmetic that is discharged in the form of a foam when used as a facial cleansing foam, shampoo, body foam, or the like.

The present invention will be explained in more detail with reference to Examples below, but it goes without saying that these Examples are given as illustrative examples and should not be construed as limiting.

(Examples 1 to 9)
Each component was blended at the blending ratio (mass%) shown in Table 1 and mixed uniformly to prepare a stock solution. Using the prepared stock solution, it was filled into an aerosol can at a ratio of 95% by mass of the stock solution and 5% by mass of propellant (LPG) to prepare a foamy aerosol thermal skin cleansing composition (this product) of the present invention.
The resulting foamy aerosol warming skin cleansing composition was subjected to various evaluation tests as an aerosol according to the following methods. In addition, the stock solution was subjected to the following stability test over time. The internal pressure of the aerosol at 25°C was 0.50 MPa, and the internal pressure at 35°C was 0.80 MPa.

<Foaming evaluation test>
Foaming when discharged from this product was visually evaluated. The results are shown in Table 2. The evaluation criteria are as follows.
〇: Foam has good durability and elasticity, △: Foam settles quickly, ×: Foam disappears immediately after being discharged.

<Re-foaming property evaluation test>
2.0 g of this product was discharged into a 300 mL graduated cylinder, 30.0 g of purified water was added, and the mixture was shaken up and down 20 times to foam again. After that, the foam was left to stand for 30 seconds, and the height of the bubbles was measured and evaluated based on the following evaluation criteria. When measuring the height, we did not include the part where water was released during standing, and the height was evaluated. The results are shown in Table 2.
○: Foam height is 8 cm or more, Δ: Foam height is 6 cm or more and less than 8 cm, ×: Foam height is less than 6 cm.
Furthermore, 10 test subjects conducted a sensory evaluation regarding the feeling of use. The results are shown in Table 3. The evaluation criteria for usability are as follows.
○: It was evaluated that the re-foaming property was felt sufficiently during use.
Δ: Re-foaming property was felt during use, but it was evaluated as unsatisfactory.
×: It was evaluated that the foam disappeared without any re-foaming property during use.

<Warmth sensation evaluation test>
After the skin was wetted with water, the degree to which the skin felt warm when the foam discharged from the product came into contact with the skin was evaluated by sensory evaluation. The results are shown in Table 2. The evaluation criteria are as follows.
○: Feels warm enough, △: Feels a little warm, ×: Does not feel warm.

<Temporal stability evaluation test>
The stock solution was stored at room temperature (25° C.) for a predetermined period of time, observed, and evaluated. The results are shown in Table 2. The evaluation criteria are as follows.
◎: Stable for more than 1 week.
○: Stable for 5 days or more, stability deteriorates in less than 1 week.
Δ: Stable for 2 days or more, stability worsens for less than 5 days.
×: Stability worsens in less than 2 days.

As shown in Table 3, those with a re-foaming property of 8 cm or more were rated as having a re-foaming property when actually used.
As shown in Table 2, Examples 1 to 8 all showed excellent results. Further, there was no scattering or dripping during discharge.
Example 9 had a high viscosity and was inferior to Examples 1 to 8 in terms of foaming during discharge.

(Comparative Examples 1 to 6)
A stock solution and an aerosol were prepared in the same manner as in Example 1, except that the formulation composition (mass %) shown in Table 4 was changed, and an evaluation test was conducted. The results are shown in Tables 5 and 6.

As shown in Table 6, products with a re-foaming property of 8 cm or less were considered to have insufficient re-foaming property, so products with a re-foaming property of 8 cm or more were evaluated as good.
As shown in Table 5, Comparative Example 1 did not contain the surfactant (B) and could not obtain refoaming properties.
Comparative Example 2 did not contain amphipathic ester oil (C) and had poor stability over time.
Comparative Example 3 contained a large amount of amphiphilic ester oil (C) and had no refoaming properties.
Comparative Example 4 did not contain (D) higher alcohol and had poor foaming during discharge.
Comparative Example 5 contained a large amount of (D) higher alcohol and had poor stability over time.
Comparative Example 6 did not contain amphipathic ester oil (C), but instead contained liquid paraffin as an oil agent without amphipathic properties, and although a warming sensation was obtained, foaming, refoaming, and Both stability over time was poor.

(Comparative Examples 7 to 16)
A stock solution and an aerosol were prepared in the same manner as in Example 1, except that the formulation composition (mass %) shown in Table 7 was changed, and an evaluation test was conducted. The results are shown in Tables 8 and 9.

Comparative Examples 7 to 9, 11, 13, 14, and 16 do not contain (B) a surfactant that is solid at room temperature, but instead use a surfactant in a liquid or aqueous solution state to reduce water in the stock solution. Although the amount was adjusted to be the same as in Example 1 and tested, the re-foaming property was weak.
Comparative Examples 10, 12, and 15 do not contain (B) a surfactant that is solid at room temperature, but instead contain a surfactant in the form of an aqueous solution. The test was prepared to be similar to 1, but since there was a lot of water, it bubbled, but no warmth was felt.

Claims (3)

A foamy aerosol thermal skin cleansing composition comprising a stock solution and a propellant, the composition comprising:
The stock solution is
(A) 40% by mass or more and 95% by mass or less of a hydrated pyrogenic substance;
(B) 0.1% by mass or more and 10% by mass or less of a powdery surfactant at room temperature;
(C) 0.1% by mass or more and 8% by mass or less of amphipathic ester oil that is liquid at room temperature;
(D) higher alcohol from 0.1% by mass to 8% by mass, and (E) water from 0% by mass to 5% by mass,
Contains
The component (B) is dispersed and blended in the stock solution,
A foamy aerosol warming skin cleansing composition having re-foaming properties . 2. The composition of claim 1, wherein the (A) hydration pyrogen is a polyhydric alcohol. The composition according to claim 1 or 2, wherein the hydrated pyrogen (A) comprises polyethylene glycol.