JP7427486B2 - foam skin cleanser - Google Patents

Description

The present invention relates to foam skin cleansers.

Conventionally, among skin cleansing agents such as facial cleansers and hand soaps, aerosol type foam skin cleansing agents are known as those that can be easily foamed during use (for example, Patent Documents 1 to 3). These foam skin cleansers can provide a dense and creamy foam with fine bubbles formed at a high density.

These aerosol type foam skin cleansers are in the form of an aerosol container filled with a stock solution and a liquefied gas as a propellant. Therefore, it is necessary to emulsify the stock solution and liquefied gas by shaking the aerosol container before use, and then discharge the foam skin cleanser.

Patent Document 4 proposes a foam skin cleanser that can be used without shaking the aerosol container before use.

Furthermore, in the technique described in Patent Document 5, efforts have been made to increase the viscosity of the foamed skin cleansing agent using higher alcohols and fatty acids, thereby suppressing the separation between the stock solution and the gas.

Japanese Patent Application Publication No. 2012-240985 Japanese Patent Application Publication No. 2017-095392 JP2019-059720A Japanese Patent Application Publication No. 2003-252725 Japanese Patent Application Publication No. 9-143039

The foam skin cleansing agent disclosed in Patent Document 4 has a composition in which the amount of liquefied gas is reduced and the amount of carbon dioxide gas is increased, so that it can be used without shaking the aerosol container before use. . However, the foam skin cleanser disclosed in Patent Document 4 has a problem with foam quality.

Further, the foam skin cleansing agent disclosed in Patent Document 5 has problems such as (a) weaker spraying and (b) lower foaming properties due to thickening of the stock solution at low temperatures.

An object of the present invention is to realize a foam skin cleansing agent that has excellent stability at low temperatures and can discharge foam with excellent foam quality without shaking before discharging even after being stored in a low-temperature environment.

As a result of intensive studies to solve the above problems, the present inventors found that a skin cleansing foam containing a predetermined amount of a specific surfactant in a stock solution in addition to a skin cleansing composition is stable at low temperatures. The present inventors have discovered a new finding that foam with excellent foam quality can be discharged without shaking before discharge even after being stored in a low-temperature environment, leading to the completion of the present invention. That is, the present invention includes the following configuration.

[1] A foam skin cleansing agent in which a stock solution and a propellant containing a liquefied gas are filled in an aerosol container, the stock solution containing the following component A,
A foam skin cleansing agent containing 0.3 to 10.0% by mass of component A;
Component A: A nonionic surfactant with an HLB of 4 to 10.

[2] The stock solution further contains the following components B and C, the content of component B is 0.05 to 1.5% by mass, and the content of component C is 0.03 to 0.4% by mass. , the foam skin cleanser of [1];
Component B: Clay mineral Component C: Polysaccharide and/or nonionic cellulose thickener.

[3] The foam skin cleanser of [1] or [2], wherein the stock solution further contains the following components D to H, and the ratio of the stock solution/the propellant is from 83/17 to 97/3;
Component D: Higher fatty acid and/or its salt Component E: Nonionic surfactant whose HLB is 11 to 17 Component F: Water Component G: Polyhydric alcohol Component H: Higher alcohol.

[4] The content of the component D is 0.3 to 5.0% by mass, the content of the component E is 1.0 to 10.0% by mass, and the content of the component G is , 5.0 to 30.0% by mass, and the content of the component H is 0.05 to 1.0% by mass, [3].

According to the present invention, the foam has excellent stability at low temperatures, and even after storage in a low-temperature environment, foam with excellent foam quality can be discharged without shaking before discharge.

Hereinafter, an example of an embodiment of the present invention will be described in detail, but the present invention is not limited thereto. The present invention is not limited to each configuration described below, and various changes can be made within the scope of the claims. Further, embodiments or examples obtained by appropriately combining technical means disclosed in different embodiments or examples are also included in the technical scope of the present invention. Furthermore, new technical features can be formed by combining the technical means disclosed in each embodiment. Note that all academic literature and patent literature described in this specification are incorporated as references in this specification.

In this specification, unless otherwise specified, the numerical range "X to Y" is intended to be "more than or equal to X and less than or equal to Y." In addition, unless otherwise specified in this specification, mass % representing the content of a component is a value based on the mass of the entire stock solution of the foam skin cleansing agent as 100 mass %.

[1. Foam skin cleanser〕
The foam skin cleansing material according to the present invention is a foam skin cleansing material in which an aerosol container is filled with a stock solution and a propellant containing a liquefied gas, the stock solution containing the following component A, and a propellant containing a liquefied gas. The content is 0.3 to 10.0% by mass;
Component A: Nonionic surfactant with HLB of 4 to 10.

Even after being stored in a low-temperature environment (for example, 5° C.), the foam skin cleanser according to the present invention can discharge foam with excellent foam quality without shaking before discharge. In order to discharge foam with excellent foam quality without shaking the foamed skin cleansing agent before dispensing, storage in a low temperature environment is a more severe condition than storage in a room temperature environment. Therefore, it goes without saying that the foam skin cleanser of the present invention can discharge foam with excellent foam quality without shaking before dispensing, even when stored not only in a low-temperature environment but also in a room-temperature environment. do not have.

Further, the stock solution may further contain the following components B and C in addition to the component A;
Component B: Clay mineral Component C: Polysaccharide and/or nonionic cellulose thickener.

Further, the stock solution may further contain the following components D to H as a cleaning composition.

Component D: Higher fatty acid and/or its salt Component E: Nonionic surfactant whose HLB is 11 to 17 Component F: Water Component G: Polyhydric alcohol Component H: Higher alcohol.

Further, the foamed skin cleanser of the present invention may contain other components in addition to the above-mentioned components.

Further, the ratio of the above-mentioned stock solution/the above-mentioned propellant is 83/17 to 98/2, preferably 88/12 to 97/3. From the viewpoint of foaming properties and discharge stability at low temperatures, the ratio may be 83/17 or more. Further, from the viewpoint of the discharge state and foam quality of the foam skin cleanser, the above ratio may be 97/3 or less.

In addition, only one type of component A, component B, component C, component D, component E, component F, component G, component H, and other components may be used, or two or more types may be used. It's okay.

The details of each component used in the foam skin cleanser according to the present invention will be explained below.

[1-1. Stock solution]
[Component A]
The foam skin cleanser according to the present invention contains, as component A, a nonionic surfactant having an HLB of 4 to 10. This component A has the role of improving the compatibility between the stock solution and the liquefied gas (for example, liquefied petroleum gas: LPG) in the foam skin cleanser according to the present invention.

The HLB of component A is 4-10, preferably 7-9. From the viewpoint of foam quality of the foam skin cleanser, the HLB may be 4 or more. Further, from the viewpoint of compatibility between the stock solution and the liquefied gas, the HLB may be 10 or less.

Examples of the nonionic surfactant having an HLB of 4 to 10 include polyglycerin fatty acid ester, polyoxyethylene glycerin fatty acid ester, sorbitan fatty acid ester, polyoxyethylene hydrogenated castor oil, polyoxyethylene alkyl ether, and the like. The number of moles of ethylene oxide added is not particularly limited, but from the viewpoint of improving stability, it is preferably 2 to 100, more preferably 4 to 90.

Specific examples of the above component A include polyglyceryl-4 oleate, polyglyceryl-4 stearate, PEG-10 glyceryl triisostearate, PEG-20 glyceryl triisostearate, PEG-3 glyceryl isostearate, and PEG-3 isostearate. 6 glyceryl, PEG-10 glyceryl trioleate, PEG-20 glyceryl trioleate, sorbitan laurate, PEG-5 hydrogenated castor oil, PEG-10 hydrogenated castor oil, ceteth-5, ceteth-10, etc. . One type of suitable component A may be used alone, or two or more types may be used in an appropriate combination.

Further, the content of component A is 0.3 to 10.0% by mass, preferably 0.4 to 5.0% by mass. From the viewpoint of compatibility between the stock solution and the liquefied gas, the content may be 0.3% by mass or more. Further, from the viewpoint of the foam quality of the foam skin cleanser, the content may be 10.0% by mass or less.

[Component B]
The foam skin cleanser according to the present invention preferably contains clay mineral as component B. In the foam skin cleanser according to the present invention, component B has the role of imparting thixotropy to the stock solution and suppressing separation of the stock solution from liquefied gas (for example, liquefied petroleum gas: LPG). Only one type of component B may be used, or two or more types may be used in combination.

The clay mineral may be a natural clay mineral, a refined natural clay mineral, or a synthesized clay mineral. The above-mentioned component A is not particularly limited, but examples of natural clay minerals or refined natural clay minerals include kaolin group clay minerals, antigorite group clay minerals, pyrophyllite group clay minerals, and mica group clay minerals. Examples include clay minerals, smectite group clay minerals, vermiculite group clay minerals, and chlorite group clay minerals.

Examples of the kaolin group clay minerals include kaolin, nacrite, dickite, and hallosite. Examples of the antigorite group clay minerals include antigorite, amethite, cronstedite, and the like; examples of the pyrophyllite group clay minerals include pyrophyllite, talc, and the like. Examples of the mica group clay minerals include illite, glauconite, celadonite, sericite, mica (mica), muscovite, chromium muscovite, and biotite. Examples of the smectite group clay minerals include bennite, montmorillonite, smectite, beidellite, nontonite, saponite, and hectorite. Examples of the vermiculite group clay mineral include vermiculite and the like. Examples of the chlorite group clay minerals include chlorite and the like.

Furthermore, examples of synthesized clay minerals include synthetic silicates and derivatives of synthetic silicates. The above-mentioned synthetic silicates and synthetic silicate derivatives are not silicate minerals whose main components are naturally occurring magnesium silicate or silicic acid (sodium/magnesium) (which contain a considerable amount of impurities), Refers to silicates and silicate derivatives obtained by synthesis.

Examples of the synthetic silicates and derivatives of synthetic silicates include synthetic silicic acid (sodium/magnesium) (INCI name "SODIUM MAGNESIUM SILICATE": International Cosmetic Ingredient Dictionary and Handbook, 14th edition, Vol. 2) ,CTFA , 2012, p. 3076), Magnesium fluorosilicate (INCI name "MAGNESIUM FLUOROSILICATE": International Cosmetic Ingredient Dictionary and Handbook, 14th edition, Volume 2, CTF A, 2012, p. 1793), fluorosilicic acid ( Sodium/Magnesium) (INCI name "SODIUM MAGNESIUM FLUOROSILICATE": International Cosmetic Ingredient Dictionary and Handbook, 14th edition, Volume 2, CTFA, 2012, p. .3076), fluorosilicic acid (magnesium/potassium) (INCI name “ MAGNESIUM POTASSIUM FLUOROSILICATE”: International Cosmetic Ingredient Dictionary and Handbook, 14th edition, Volume 2, CTFA, 2012, p. 1799), full Orosilicic acid (magnesium/sodium) (INCI name "MAGNESIUM SODIUM FLUOROSILICATE": International Cosmetic Ingredient Dictionary and Handbook, 14th edition, Volume 2, CTFA, 2012, p. 1800), synthetic aluminum silicate (INCI name "ALUMINUM SILICATE": International Cosmetic Ingredient Dictionary) ary and Handbook, 14th edition, Volume 1, CTFA , 2012, p. 156).

Commercially available products of the synthetic silicate and derivatives of the synthetic silicate include, for example, those manufactured by Rockwood Co., Ltd. under the trade name "Laponite XLG" and the trade name "Laponite XL21."

In the present invention, from the viewpoint of compatibility between the stock solution and liquefied gas (for example, liquefied petroleum gas: LPG), the component B is a group consisting of fluorosilicic acid (sodium/magnesium), synthetic sodium/magnesium silicate, and bentonite. Preferably, it is at least one type of clay mineral selected from.

The content of component B is preferably 0.05 to 1.5% by mass, more preferably 0.08 to 1.0% by mass, and even more preferably 0.2 to 0.5% by mass. From the viewpoint of suppressing separation between liquefied gas (for example, liquefied petroleum gas: LPG) and the stock solution, the content is preferably 0.05% by mass or more. Moreover, from the viewpoint of suppressing the increase in viscosity of the stock solution of the foamed skin cleansing material during low-temperature storage, the content is preferably 1.5% by mass or less.

[Component C]
It is preferable that the foamed skin cleanser according to the present invention contains a polysaccharide and/or a nonionic cellulose thickener as component C. This component C has the role of suppressing separation of the liquefied gas (for example, liquefied petroleum gas: LPG) and the stock solution in the foam skin cleansing material according to the present invention. Only one type of component C may be used, or two or more types may be used in combination.

Specifically, the polysaccharide is a polysaccharide thickener. The polysaccharide of component C is not particularly limited, but is preferably a nonionic polysaccharide. Nonionic polysaccharides are, for example, polysaccharides composed of one or more monosaccharides such as glucose, galactose, mannose, arabinose, and xylose. Specific examples of nonionic polysaccharides include dextran, pullulan, arabinogalactan, guar gum, tara gum, locust bean gum, konjac mannan, tamarind seed gum, and xanthan gum. These components may be used alone or in an appropriate combination of two or more. As a suitable polysaccharide, it is preferable to use xanthan gum from the viewpoint of formulation stability.

In addition, nonionic cellulose-based thickeners include, but are not particularly limited to, methylcellulose, ethylcellulose, hydroxyethylcellulose, hydroxypropylcellulose, hydroxypropylmethylcellulose, and the like.

The content of component C is preferably 0.03 to 0.4% by mass, more preferably 0.05 to 0.25% by mass, and even more preferably 0.07 to 0.15% by mass. From the viewpoint of suppressing separation between the liquefied gas (for example, liquefied petroleum gas: LPG) and the stock solution, the content is preferably 0.03% by mass or more. Moreover, from the viewpoint of suppressing the increase in viscosity of the stock solution of the foamed skin cleansing material during low-temperature storage, the content is preferably 0.4% by mass or less.

[Component D]
It is preferable that the foamed skin cleanser according to the present invention contains, as component D, a higher fatty acid and/or a salt thereof, that is, one or both of a higher fatty acid and a higher fatty acid salt. In the foamed skin cleansing agent according to the present invention, this component D acts as a cleaning component to enhance the cleaning power of the foamed skin cleansing agent, and is effective in improving the foaming properties and foam retention of the foamed skin cleansing agent. It is. Furthermore, it is effective in forming dense foam with high foam density. The above component D may be used alone or in combination of two or more.

Examples of the higher fatty acids include higher fatty acids having 12 to 22 carbon atoms such as lauric acid, myristic acid, palmitic acid, stearic acid, oleic acid, and behenic acid; vegetable oils and fats such as olive oil, coconut oil, palm oil, and cottonseed oil. ; Examples include animal fats and oils such as fish oil and beef tallow. Among these, higher fatty acid salts having 12 to 22 carbon atoms are preferred, and lauric acid, myristic acid, palmitic acid, and stearic acid are more preferred, from the viewpoint of detergency, foaming properties, and foam retention of the foam skin cleanser.

Examples of the salts in the higher fatty acid salts include alkali metal salts such as sodium salts and potassium salts; alkanolamine salts such as monoethanolamine salts, diethanolamine salts, and triethanolamine salts.

The above-mentioned higher fatty acid salt may contain a higher fatty acid salt prepared in advance as a salt, or a higher fatty acid and a base may form a salt in an undiluted solution.

The content of component D is preferably 0.3 to 5.0% by mass, more preferably 0.5 to 3.0% by mass as the amount of higher fatty acids. From the viewpoint of foaming properties and cleansing properties, the content may be 0.3% by mass or more. In addition, from the viewpoint of suppressing the increase in viscosity of the stock solution of the foamed skin cleansing material during low-temperature storage, the content may be 5.0% by mass or less. The above content is the total amount of all components D contained in the stock solution (content when converted into higher fatty acids).

[Component E]
The foam skin cleanser according to the present invention preferably contains a nonionic surfactant having an HLB of 11 to 17 as component E. In the foamed skin cleansing agent according to the present invention, this component E acts as a cleaning component to enhance the cleaning power of the foamed skin cleansing agent, and is effective in improving the foaming properties and foam retention of the foamed skin cleansing agent. It is. Furthermore, it is effective in forming dense foam with high foam density. The above component E may be used alone or in combination of two or more.

Component E includes, for example, glycerin fatty acid ester, polyglycerin fatty acid ester, ethylene oxide condensate of glycerin fatty acid ester, polyethylene glycol fatty acid ester, propylene glycol fatty acid ester, sorbitan fatty acid ester, ethylene oxide condensate of sorbitan fatty acid ester, Examples include polyoxyalkylene alkyl ether, polyoxyethylene hydrogenated castor oil, polyoxyethylene castor oil, polyoxyethylene lanolin, and the like.

More specifically, for example, glyceryl monocaprylate, glyceryl monocaprate, glyceryl monolaurate, glyceryl monomyristate, glyceryl monopalmitate, glyceryl monostearate, glyceryl monoisostearate, glyceryl monobehenate, glyceryl monooleate. , glyceryl fatty acid esters such as glyceryl monoerucate, glyceryl sesquioleate, glyceryl distearate, glyceryl diisostearate, glyceryl dialachate; diglyceryl monocaprylate, decaglyceryl monocaprylate, hexaglyceryl monocaprate, tetraglyceryl monolaurate, Hexaglyceryl monolaurate, decaglyceryl monolaurate, poly(4-10)glyceryl monolaurate, decaglyceryl monomyristate (polyglyceryl-10 myristate), decaglyceryl monostearate, decaglyceryl monoisostearate, poly(4-10) monostearate 2-10) Glyceryl, diglyceryl monooleate, hexaglyceryl monooleate, diglyceryl sesquioleate, poly(2-10) glyceryl diisostearate, poly(6-10) glyceryl distearate, diglyceryl triisostearate, Polyglycerin fatty acid esters such as poly(10)glyceryl tristearate; ethylene oxide condensates of glycerin fatty acid esters such as polyoxyethylene glyceryl monostearate and polyoxyethylene glyceryl monooleate; polyethylene glycol monooleate, monostearic acid Polyethylene glycol fatty acid esters such as polyethylene glycol, polyethylene glycol monolaurate; Propylene glycol fatty acid esters such as propylene glycol monostearate, propylene glycol monolaurate, propylene glycol monooleate; sorbitan monooleate, sorbitan monostearate, monoisostearic acid Sorbitan fatty acid esters such as sorbitan, sorbitan monopalmitate, sorbitan monolaurate, sorbitan trioleate, sorbitan tristearate, sorbitan sesquistearate, sorbitan sesquioleate, sorbitan sesquiisostearate, and coconut fatty acid sorbitan; polyoxy monolaurate Ethylene sorbitan, polyoxyethylene sorbitan monopalmitate, polyoxyethylene sorbitan monostearate, polyoxyethylene sorbitan monooleate, polyoxyethylene sorbitan monoisostearate, monococo fatty acid polyoxyethylene sorbitan, polyoxyethylene sorbitan tristearate , ethylene oxide condensates of sorbitan fatty acid esters such as polyoxyethylene sorbitan trioleate; polyoxyethylene lauryl ether, polyoxyethylene cetyl ether (cetheth-20), polyoxyethylene stearyl ether, polyoxyethylene oleyl ether, polyoxy Examples include polyoxyalkylene alkyl ethers such as ethylene polyoxypropylene lauryl ether, polyoxypropylene cetyl ether, polyoxypropylene isocetyl ether, polyoxypropylene stearyl ether, and polyoxypropylene oleyl ether.

The content of component E is preferably 1.0 to 10.0% by mass, more preferably 3.0 to 8.0% by mass. From the viewpoint of foaming properties and detergency, the content may be 1.0% by mass or more. Further, from the viewpoint of ease of washing off the foam skin cleanser, the content may be 10.0% by mass or less.

[Component F]
The foam skin cleanser according to the present invention preferably contains water as component F. Component F is not particularly limited, but purified water is preferred. The content of water in component F can be appropriately set depending on the content of components other than component F, but is preferably 65.0 to 85.0% by mass, more preferably 70.0 to 80.0% by mass. %.

[Component G]
The foam skin cleanser according to the present invention preferably contains polyhydric alcohol as component G. Component G, polyhydric alcohol, is effective in maintaining foam. It also has the effect of suppressing the precipitation of crystals such as higher fatty acid salts. Furthermore, it has the effect of smoothing the foam and making it creamy. The above-mentioned component G may be used alone or in combination of two or more.

Examples of the component G include ethylene glycol, diethylene glycol, triethylene glycol, propylene glycol, isoprene glycol, dipropylene glycol (DPG), polyethylene glycol (PEG), and 1,3-butylene glycol (1,3-butanediol). , 1,2-butanediol, 1,2-pentanediol, 1,2-hexanediol, 1,2-octanediol, 1,2-decanediol, glycerin (1,2,3-propanetriol), diglycerin , polyglycerin, sorbitol, maltitol, polyoxyethylene methyl glucoside, polyoxypropylene methyl glucoside, and the like.

The content of the component G can be set as appropriate, but is preferably 5.0 to 30.0% by mass, more preferably 10.0 to 25.0% by mass. From the viewpoint of suppressing precipitation of solid components, the content may be 5.0% by mass or more. Further, from the viewpoint of ease of washing off the foam skin cleanser, the content may be 25.0% by mass or less. The above content is the total content of all components G contained in the stock solution.

The polyhydric alcohol preferably contains polyethylene glycol from the viewpoint of further improving the effect of suppressing precipitation of solid components and forming dense foam with high foam density.

The number average molecular weight of the polyethylene glycol is not particularly limited, but is preferably 50 to 10,000, more preferably 100 to 5,000.

The content of the polyethylene glycol is preferably 0.1 to 10.0% by mass, more preferably 0.5 to 8.0% by mass from the viewpoint of improving foam retention, foam density, and crystal precipitation suppressing effect. .

[Component H]
The foam skin cleanser according to the present invention preferably contains higher alcohol as component H. This component H has the role of improving foam quality in the foam skin cleanser according to the present invention. Only one type of component H may be used, or two or more types may be used in combination.

The higher alcohol of component H is not particularly limited, but includes, for example, lauryl alcohol, myristyl alcohol, cetyl alcohol (cetanol), stearyl alcohol, cetearyl alcohol, isostearyl alcohol, hexyldecanol, 2-octyldodecanol, oleyl alcohol, decyltetra Examples include decanol and behenyl alcohol.

The content of component H can be set as appropriate, but is preferably 0.05 to 1.0% by mass, more preferably 0.1 to 0.8% by mass. From the viewpoint of emulsion stability and foaming properties, the content may be 0.05% by mass or more. In addition, from the viewpoint of suppressing the increase in viscosity of the stock solution of the foamed skin cleansing material during low-temperature storage, the content may be 1.0% by mass or less.

[Other ingredients]
The above-mentioned stock solution is not particularly limited, but may contain components other than the above-mentioned components A to H (other components). For example, fragrance; silicone oil such as cyclopentasiloxane, hydrogen dimethicone, caprylyl methicone, methylphenyl polysiloxane, dimethicone; preservatives such as phenoxyethanol, octoxyglycerin, methylparaben; menthol, menthyl glyceryl ether, camphor, peppermint oil, etc. Cooling agents; anti-inflammatory agents such as dipotassium glycyrrhizinate and stearyl glycyrrhizinate; plant extracts such as peony, botanpi, loquat, and aloe; bactericides; antioxidants such as tocopherol and dibutylhydroxytoluene; octyl methoxycinnamate, dimethoxy UV absorbers such as benzylidene dioxoimidazolidine octyl propionate, diethylaminohydroxybenzoylhexyl benzoate, t-butylmethoxydibenzoylmethane, octyl triazone, and 2-ethylhexyl paramethoxycinnamate; chelating agents such as edetate; It may also contain whitening agents such as arbutin and ascorbic acid; powders such as silica, talc, and nylon powder.

Examples of the above-mentioned disinfectants include isopropylmethylphenol, benzalkonium chloride, hinokitiol, triclosan, dipotassium glycyrrhizinate, and salicylic acid. Among these, isopropylmethylphenol and salicylic acid are more preferred, and salicylic acid is even more preferred. The above-mentioned fungicides may be used alone or in combination of two or more.

[1-2. Propellant]
The propellant of the foam skin cleanser of the present invention contains a liquefied gas from the viewpoint of foaming properties and compatibility between the stock solution and the propellant. Examples of the liquefied gas include liquefied petroleum gas (LPG), dimethyl ether (DME), isopentane, and fluorocarbon. Only one type of liquefied gas may be used, or two or more types may be used. In addition to the liquefied gas, the propellant may be a compressed gas such as air, nitrogen, carbon dioxide, or nitrous oxide.

The content of liquefied gas in 100% by mass of the propellant is preferably 98.0% by mass or more, more preferably 99.0% by mass or more, and even more preferably 100% by mass.

In addition, the propellant of the foam skin cleanser of the present invention does not contain liquefied petroleum gas, from the viewpoint of easy adjustment of the internal pressure of the aerosol container, the compatibility between the stock solution and the propellant, and the foam quality. It is preferable that

The content of liquefied petroleum gas in 100% by mass of the propellant is preferably 50.0% by mass or more, more preferably 70.0% by mass or more, still more preferably 90.0% by mass or more, and most preferably 99% by mass or more. .0% by mass or more.

[2. Manufacturing method and use of foam skin cleanser]
The foam skin cleanser of the present invention can be manufactured by known methods. For example, a manufacturing method can be exemplified in which a stock solution is filled into an aerosol container, the container is clinched by an aerosol valve, a prescribed amount of propellant is filled into the container from the stem, and an injection button is attached. Note that the aerosol container includes well-known and commonly used containers, and is not particularly limited.

The mixing ratio (mass ratio, composition/propellant) of the stock solution and the propellant can be set as appropriate, but is preferably 83/17 to 98/2, more preferably 88/12 to 97/3. From the viewpoint of foaming properties and discharge stability at low temperatures, the mixing ratio may be 83/17 or more. Further, from the viewpoint of discharge state and foam quality, the above-mentioned mixing ratio may be 98/2 or less.

The foamed skin cleansing agent of the present invention is a skin cleansing agent used for cleaning the skin of the face and the like. Examples of the foamed skin cleanser of the present invention include facial cleansers, hand soaps, body soaps, and scalp cleansers. The foamed skin cleansing agent of the present invention suppresses the feeling of tightness on the skin after washing and forms a firm, dense foam with a fine texture, so it is particularly suitable for use as a cleansing agent for delicate areas such as facial cleansing agent. Are suitable.

An embodiment of the present invention will be described below.

[1. Examples 1 to 16 and Comparative Examples 1 to 6]
Stock solutions of Examples 1 to 16 and Comparative Examples 1 to 6 were prepared by blending each component as shown in Tables 1 and 2. Then, the stock solution and propellant were blended at the stock solution ratio and propellant ratio shown in Tables 1 and 2, and the mixture was filled into an aerosol container to obtain a foam skin cleanser. As for the material of the aerosol container body, a transparent glass aerosol container and an aluminum aerosol container were used.

Note that liquefied petroleum gas (LPG) was used as the propellant. Then, liquefied petroleum gas was filled into the aerosol container so that the gas pressure within the aerosol container was 0.39 MPa.

[2. Details of each ingredient]
In Tables 1 and 2, details of each component are as follows.

<Component A>
PEG-20 glyceryl triisostearate (HLB: 8): manufactured by Nippon Emulsion Co., Ltd., product name “EMALEX GWIS-320”,
Seteth-5 (HLB: 9.4): Manufactured by Nippon Emulsion Co., Ltd., product name "EMALEX 105",
PEG-10 hydrogenated castor oil (HLB: 7): manufactured by Nippon Emulsion Co., Ltd., product name “EMALEX HC-10”,
PEG-10 glyceryl trioleate (HLB: 5): manufactured by Nippon Emulsion Co., Ltd., product name “EMALEX GWO-310”,
<Nonionic surfactant not corresponding to component A>
PEG-60 glyceryl isostearate (HLB: 16): manufactured by Nippon Emulsion Co., Ltd., product name “EMALEX GWIS-160”,
PEG-5 glyceryl trioleate (HLB: 3): manufactured by Nippon Emulsion Co., Ltd., product name "EMALEX GWO-305",
PEG-30 hydrogenated castor oil (HLB: 11): manufactured by Nippon Emulsion Co., Ltd., product name "EMALEX HC-30".

<Component B>
Fluorosilicic acid (Na/Mg): manufactured by Rockwood Additives Limited, product name “Laponite XL21”,
Bentonite: Manufactured by Japan Organic Clay Co., Ltd., product name "Benger".

<Component C>
Xanthan gum: manufactured by DSP Gokyo Food & Chemical Co., product name “Echo Gum T”,
Hydroxyethyl cellulose: manufactured by Daicel Chemical Industries, Ltd., product name "HEC Daicel SE900".

<Component D>
Lauric acid: manufactured by Emery Oleochemicals, product name “EDENOR C12-99 (C)”,
Myristic acid: manufactured by Emery Oleochemicals, product name "EDENOR C14-99 (C)",
Palmitic acid: manufactured by Emery Oleochemicals, product name “EDENOR C16-98 MY”,
Triethanolamine: manufactured by Japan Chemtech, product name "TEA-99".

<Component E>
Polyglyceryl myristate-10 (HLB: 14.9): manufactured by Aoki Yushi Kogyo Co., Ltd., product name “Grief 10MM”,
Ceteth-20 (HLB: 15.5): Manufactured by Aoki Yushi Kogyo Co., Ltd., product name "Brownon CH-320L".

<Component G>
Concentrated glycerin: Manufactured by Sakamoto Pharmaceutical Co., Ltd., product name: “Cosmetic Concentrated Glycerin”
DPG: Manufactured by Oxalis Chemicals, product name “dipropylene glycol S”,
PEG-32, PEG-6: Manufactured by Aoki Yushi Kogyo Co., Ltd., product name: "Brownon PEG-1500".

<Component H>
Setanol: Manufactured by Kao Corporation, product name "Calcol 6870".

<Other ingredients>
Phenoxyethanol: Manufactured by Yokkaichi Gosei Co., Ltd., product name "Phenoxyethanol-S".

[3. evaluation〕
The foam skin cleansers of Examples 1 to 16 and Comparative Examples 1 to 10 were stored at low temperature (5° C.) for 8 weeks. The foamed skin cleanser after storage was evaluated as follows. In addition, the following evaluation was performed without shaking the aerosol container immediately before the evaluation test.

<3-1. Stability at low temperatures>
Evaluation was performed using a transparent glass aerosol container. Stability at low temperatures was evaluated by visually observing the state of separation of the contents in the foam skin cleanser after storage.

(Evaluation criteria)
◎: When the appearance of the contents was uniform, the stability at low temperature was evaluated as "◎".
○: There is a slight difference between the upper end and the lower end of the contents, but if they are not separated, the stability at low temperature was evaluated as "○".
×: When the propellant layer and the stock solution layer were separated, the stability at low temperature was evaluated as “x”.

<3-2. Viscosity at low temperature>
Evaluation was performed using a transparent glass aerosol container. The viscosity at low temperatures was evaluated by visually observing the fluidity of the contents when the foamed skin cleanser was tilted after storage.

(Evaluation criteria)
◎: When the contents flow as the foamed skin cleanser is tilted, the viscosity at low temperatures was evaluated as "◎".
○: It is more viscous than ◎, but when the contents flow completely in less than 5 seconds after tilting the foam skin cleanser, the viscosity at low temperature was evaluated as "○".
×: If the foamed skin cleansing agent does not flow even when tilted, or if it takes 5 seconds or more for the contents to complete flowing after tilting the foamed skin cleansing agent, the viscosity at low temperatures is marked “×” It was evaluated as follows.

<3-3. Injection condition at low temperature>
Evaluation was performed using an aluminum aerosol container. The spraying state at low temperatures was evaluated by visually observing the ejection state and foaming state when the stored foamed skin cleansing agent was ejected onto the palm of the hand for 2 seconds.

(Evaluation criteria)
◎: When the foam is discharged smoothly, the injection condition at low temperature was evaluated as "◎".
○: When the ink was discharged smoothly but it took less than 3 seconds to completely foam, the low-temperature injection condition was evaluated as "○".
×: When the discharge is not smooth, or when the discharge is smooth but it takes 3 seconds or more to completely foam, the low-temperature injection condition was evaluated as "x".

<3-4. Foam quality at low temperatures>
Evaluation was performed using an aluminum aerosol container. The foam quality at low temperatures was evaluated by visually observing the foam quality when the stored foam skin cleanser was discharged onto the palm of the hand for 2 seconds.

(Evaluation criteria)
◎: When the foam is fine and uniform, the foam quality at low temperature was evaluated as "◎".
○: Fine foam, but if there are some rough spots, the foam quality at low temperature was evaluated as "○".
×: In the case of coarse foam and/or in the case of defoaming, the foam quality at low temperature was evaluated as “x”.

[4. Test results〕
From Tables 1 to 3, reference examples 1 to 6 and The foamed skin cleansers of Examples 7 to 16 were found to be superior to the foamed skin cleansers of Comparative Examples 1 to 6 . Therefore, the foam skin cleansers of Reference Examples 1 to 6 and Examples 7 to 16 have excellent stability at low temperatures, and even after storage in a low temperature environment, they can produce foam with excellent foam quality without shaking before dispensing. can be discharged.

[Prescription example 1]
(undiluted solution)
PEG-20 glyceryl triisostearate 0.5% by mass
Fluorosilicic acid (Na/Mg) 0.3% by mass
Xanthan gum 0.1% by mass
Polyglyceryl myristate-10 3.0% by mass
Ceteth-20 1.5% by mass
Concentrated glycerin 10.0% by mass
DPG 5.0% by mass
PEG-32, PEG-6 5.0% by mass
Sodium cocoyl glutamate 2.5% by mass
Phenoxyethanol 0.1% by mass
Menthol 0.05% by mass
Fragrance 0.05% by mass
water remainder
Total 100.0% by mass
(propellant)
LPG 100.0% by mass
Stock solution: propellant = 96:4 (mass ratio).

The foamed skin cleanser of the present invention can be used as a cleanser for the face, hands, body, scalp, hair, and the like.

Claims (3)

A foam skin cleansing agent in which a stock solution and a propellant containing a liquefied gas are filled in an aerosol container, the stock solution containing the following components A to C,
The content of component A is 0.3 to 10.0% by mass, the content of component B is 0.05 to 1.5% by mass, and the content of component C is 0.03 to 0.4% by mass. %, foam skin cleanser;
Component A : A nonionic surfactant that is a polyoxyethylene glycerin fatty acid ester and has an HLB of 4 to 10. Component B: Clay mineral. Component C: A monomer selected from the group consisting of glucose, galactose, mannose, arabinose, and xylose. A nonionic cellulose thickener selected from the group consisting of polysaccharides and/or methylcellulose, ethylcellulose, hydroxyethylcellulose, hydroxypropylcellulose, and hydroxypropylmethylcellulose . The stock solution further contains the following components D to H,
The foam skin cleanser according to claim 1, wherein the ratio of the stock solution/the propellant is from 83/17 to 98/2;
Component D: Higher fatty acid having 12 to 22 carbon atoms and/or its salt Component E: Nonionic surfactant with HLB of 11 to 17 Component F: Water Component G: Polyhydric alcohol Component H: Lauryl alcohol, myristyl alcohol, cetyl A higher alcohol selected from the group consisting of alcohol (cetanol), stearyl alcohol, cetearyl alcohol, isostearyl alcohol, hexyldecanol, 2-octyldodecanol, oleyl alcohol, decyltetradecanol, and behenyl alcohol. The content of the component D is 0.3 to 5.0% by mass, the content of the component E is 1.0 to 10.0% by mass, and the content of the component G is 5. The foam skin cleanser according to claim 2, wherein the content of component H is 0 to 30.0% by mass and the content of component H is 0.05 to 1.0% by mass.