JP7121617B2 - foam skin cleanser - Google Patents

Description

The present invention relates to foam skin cleansers.

Among skin cleansers such as facial cleansers and hand soaps, foam skin cleansers that form foams by discharging them from a pump-type or aerosol-type foamer container have been conventionally known as those that can be easily foamed at the time of use. (For example, Patent Documents 1 to 3). In these foam skin cleansers, characteristics such as ease of foaming (foaming power), foam quality, and foam sustainability (foam retention) are emphasized. As the foam quality, for example, dense and creamy foam quality in which fine bubbles are formed at high density is required.

JP 2012-102194 A JP 2007-131585 A JP 2012-240985 A

A detergent containing a higher fatty acid salt as a main surfactant component, such as that disclosed in Patent Document 1, has high foaming power and excellent foam quality. However, for example, when used as a facial cleanser, the skin may feel tight after cleansing. On the other hand, detergents that do not contain higher fatty acid salts, such as those disclosed in Patent Documents 2 and 3, may be inferior in terms of foaming power and foam fineness.

An object of the present invention is to provide a foam-type skin cleanser that suppresses the feeling of skin tension after cleansing and forms firm, dense foam with fine texture while containing higher fatty acids and/or salts thereof. That is.

The present invention is a foam skin cleanser in which a concentrate and a propellant are packed in an aerosol container, wherein the concentrate contains the following component A, component B, component C, and component D. It relates to a foam skin cleanser.
Component A: Higher fatty acid and/or salt thereof Component B: Fatty acid ester oil that is solid at room temperature Component C: Water Component D: Sorbitan fatty acid ester type nonionic surfactant

According to the present invention, there is provided a foam-type skin cleanser that suppresses the feeling of skin tension after cleansing and forms firm, fine-textured, dense foam while containing a higher fatty acid and/or a salt thereof. be able to.

The foamed skin cleanser of the present invention is obtained by filling an aerosol container with a stock solution and a propellant. The foamed skin cleanser of the present invention forms foam when used, that is, when it is discharged from an aerosol container and/or after it adheres to an object, and has fine, firm and dense foam. can be discharged. Each component of the foam skin cleanser of the present invention will be described below.

The stock solution contains component A: higher fatty acid and/or salt thereof, component B: fatty acid ester oil that is solid at room temperature, component C: water, and component D: sorbitan fatty acid ester type nonionic surfactant as essential components. contains.

The stock solution preferably further contains component E: polyhydric alcohol, component F: thickening compound, etc., in addition to the above essential components. In addition, components other than components A to F (other components) may be further contained. Each of components A to F and other components may be used alone or in combination of two or more.

Component A is a higher fatty acid and/or a salt thereof, ie either one or both of a higher fatty acid and a higher fatty acid salt. Component A acts as a cleansing component to enhance the detergency of the foam skin cleanser, and is effective in improving the foamability and foam retention of the foam skin cleanser. Furthermore, it is effective in forming dense foam with high foam density. Only one kind of component A may be used, or two or more kinds thereof may be used.

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. animal oils such as fish oil and beef tallow; Among them, higher fatty acids having 12 to 22 carbon atoms are preferable, and lauric acid, myristic acid, palmitic acid and stearic acid are more preferable from the viewpoint of detergency, foamability and foam retention of the foam skin cleanser.

Examples of 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 higher fatty acid salt may contain a higher fatty acid salt prepared in advance, or may form a salt in the undiluted solution with the higher fatty acid and the base.

The content of component A in 100% by mass of the stock solution is preferably 0.1 to 10.0% by mass, more preferably 0.5 to 8.0% by mass, and still more preferably 1.0 to 5.0% by mass. When the content is 0.1% by mass or more, the foam retention is further improved, which is preferable. Further, when the content is 10.0% by mass or less, clogging of the aerosol due to precipitation of component A is further suppressed, which is preferable. The above content is the total content of all component A contained in the stock solution (converted as higher fatty acid).

Component B is a fatty acid ester oil that is solid at room temperature. In this specification, fatty acid ester oil that is solid at room temperature means that 50 g of fatty acid ester oil is placed in a 70 mL mayonnaise bottle under conditions of 25 ° C., and the container is tilted at an angle of 45 degrees for 30 seconds. It refers to a paste to a solid state that does not flow down. It was newly discovered that component B has the effect of suppressing the feeling of skin tension after cleansing and forming firm, dense foam with finer texture. Only one kind of component B may be used, or two or more kinds thereof may be used.

Component B includes, for example, hexa(hydroxystearic acid/stearic acid/rosin acid) dipentaerythrityl, tetra(hydroxystearic acid/isostearate) dipentaerythrityl, and hexahydroxystearate dipentaerythrityl.

The content of component B in 100% by mass of the stock solution is preferably 0.01 to 4.0% by mass, more preferably 0.05 to 3.5% by mass, and still more preferably 0.1 to 3.0% by mass. When the content is 0.01% by mass or more, it is preferable because it suppresses the feeling of skin tension after cleansing and forms firm and dense lather with fine texture. Further, when the content is 4.0% by mass or less, stickiness after washing can be suppressed, which is preferable. The above content is the total content of all component B contained in the stock solution.

In addition to component B above, the stock solution may optionally further contain a fatty acid ester oil that is liquid at room temperature. In this specification, the fatty acid ester oil that is liquid at room temperature means that the viscosity (Brookfield viscometer: VISCOMETER TV-25 (manufactured by Toki Sangyo Co., Ltd.)) is 100 mPa s or less under the condition of 25 ° C. point to The fatty acid ester oil, which is liquid at room temperature, suppresses the feeling of tightness of the skin after cleansing, and also has the effect of suppressing precipitation of component A. Only one type of fatty acid ester oil that is liquid at room temperature may be used, or two or more types may be used.

Examples of fatty acid ester oils that are liquid at room temperature include ester oils of linear fatty acids and branched lower alcohols, ester oils of linear fatty acids and linear higher alcohols, ester oils of linear fatty acids and branched higher alcohols, and branched fatty acid ester oils. A component selected from an ester oil of a fatty acid and a linear higher alcohol, an ester oil of a branched fatty acid and a branched higher alcohol, an ester oil of a fatty acid and a polyhydric alcohol, and an ester oil of a dibasic acid.

Examples of ester oils of straight-chain fatty acids and branched lower alcohols include isopropyl myristate, isopropyl palmitate, and isopropyl linoleate.

Examples of ester oils of straight-chain fatty acids and straight-chain higher alcohols include cetyl caprylate, hexyl laurate, decyl myristate, decyl oleate, and oleyl oleate.

Examples of ester oils of straight-chain fatty acids and branched higher alcohols include isostearyl laurate, isotridecyl myristate, 2-hexyldecyl myristate, isostearyl myristate, octyldodecyl myristate, 2-ethylhexyl palmitate, and palmitate. isocetyl acid, isostearyl palmitate, 2-ethylhexyl stearate, isocetyl stearate, isodecyl oleate, octyldodecyl oleate, and octyldodecyl linoleate.

Examples of ester oils of branched fatty acids and linear higher alcohols include cetyl 2-ethylhexanoate, cetostearyl 2-ethylhexanoate, stearyl 2-ethylhexanoate, and hexyl isostearate.

Examples of ester oils of branched fatty acids and branched higher alcohols include 2-hexyldecyl 2-ethylhexanoate, isostearyl 2-ethylhexanoate, octyldodecyl dimethyloctanoate, 2-ethylhexyl isopalmitate, and isocetyl isostearate. , isostearyl isostearate, octyldodecyl isostearate, and isononyl isononanoate.

Examples of ester oils of the above fatty acids and polyhydric alcohols include ethylene glycol dioleate, propylene glycol dicaprylate, propylene glycol di(caprylic/capric acid), propylene glycol dicaprate, propylene glycol dioleate, and neopentyl glycol dicaprate. , neopentyl glycol dioctoate, glyceryl tri-2-ethylhexanoate, caprylic-capric triglyceryl, glyceryl triisostearate, trimethylolpropane tri-2-ethylhexanoate, trimethylolpropane triisostearate, tetra-2-ethyl Examples include pentaerythritol hexanoate and pentaerythritol tetraisostearate.

Examples of the dibasic acid ester oil include diisopropyl adipate, diisobutyl adipate, dioctyl adipate, diisopropyl sebacate, and dioctyl sebacate.

In the present invention, among the fatty acid ester oils that are liquid at room temperature, ester oils of linear fatty acids and branched lower alcohols are used from the viewpoint of suppressing skin tightness after cleansing and further suppressing the precipitation of component A. A component selected from an ester oil of a straight-chain fatty acid and a branched higher alcohol, an ester oil of a branched fatty acid and a straight-chain higher alcohol, an ester oil of a branched fatty acid and a branched higher alcohol, and an ester oil of a dibasic acid can be used. More preferably, a component selected from isopropyl myristate, octyldodecyl myristate, 2-ethylhexyl palmitate, cetyl 2-ethylhexanoate, isononyl isononanoate, diisobutyl adipate, and diisopropyl adipate is used.

The content of the fatty acid ester oil that is liquid at room temperature in 100% by mass of the stock solution is preferably 0.1 to 5.0% by mass, more preferably 0.3 to 4.0% by mass, and still more preferably is 0.5 to 3.0% by mass. When the content is 0.1% by mass or more, it is preferable because it suppresses skin tightness after cleansing and further suppresses precipitation of component A. In addition, it is preferable that the content is 5.0% by mass or less in order to maintain foam retention. The above content is the total content of all room temperature liquid fatty acid ester oils contained in the stock solution.

The water of component C is not particularly limited as long as it can be used as a raw material for cosmetics, but usually purified water is preferably used.

The content of component C in 100% by mass of the stock solution is preferably 60.0% by mass or more, more preferably 70.0% by mass or more, from the viewpoint of preventing solidification of the discharge. From the viewpoint of prevention, 98.0% by mass or less is preferable, and 90.0% by mass or less is more preferable.

Component D is a sorbitan fatty acid ester type nonionic surfactant. Component D is effective in forming firm and dense lather. Only one kind of component D may be used, or two or more kinds thereof may be used.

Examples of component D include a component selected from sorbitan fatty acid esters and ethylene oxide condensates of sorbitan fatty acid esters.

Examples of the sorbitan fatty acid ester include sorbitan monolaurate, sorbitan monopalmitate, sorbitan monostearate, sorbitan monoisostearate, sorbitan monooleate, sorbitan coconut oil fatty acid, sorbitan sesquistearate, sorbitan sesquiisostearate, and sesquiolein. sorbitan acid, sorbitan distearate, sorbitan tristearate, sorbitan trioleate, and the like.

Examples of the ethylene oxide condensates of sorbitan fatty acid esters include polyoxyethylene sorbitan monolaurate, polyoxyethylene sorbitan monopalmitate, polyoxyethylene sorbitan monostearate, polyoxyethylene sorbitan monoisostearate, and polyoxy monooleate. Examples include ethylene sorbitan, coconut oil fatty acid polyoxyethylene sorbitan, polyoxyethylene sorbitan tristearate, and polyoxyethylene sorbitan trioleate.

The fatty acid in component D is preferably a fatty acid having 8 to 24 carbon atoms, more preferably a fatty acid having 10 to 20 carbon atoms, and still more preferably a fatty acid having 10 to 20 carbon atoms, from the viewpoint of more effectively exhibiting firm and dense foam formation. Fatty acids with 12 to 18 carbon atoms.

When component D is an ethylene oxide condensate, the average number of added moles of ethylene oxide is preferably 5 to 200, more preferably 6 to 150, from the viewpoint of more effectively exhibiting firm and dense foam formation. is.

In the present invention, among component D, from the viewpoint of more effectively exhibiting firm and dense foam formation, It is preferable to use a component selected from oxyethylene sorbitan, polyoxyethylene sorbitan monoisostearate, polyoxyethylene sorbitan tristearate, and polyoxyethylene sorbitan trioleate, sorbitan coconut oil fatty acid, and polyoxyethylene monostearate. More preferably, a component selected from sorbitan is used.

The content of component D in 100% by mass of the stock solution is preferably 0.05 to 5.0% by mass, more preferably 0.1 to 4.0%, from the viewpoint of forming firm and dense foam. % by mass, more preferably 0.1 to 3.0% by mass. The above content is the total content of all component D contained in the stock solution.

In addition to component D, the stock solution may optionally further contain a nonionic surfactant such as a polyethylene glycol fatty acid ester type nonionic surfactant. For example, a polyethylene glycol fatty acid ester-type nonionic surfactant can more effectively enhance the suppression of component A precipitation. It also exhibits the effect of forming dense foam with a high foam density and improving the foam retention of the foam. Nonionic surfactants other than component D may be used alone, or may be used in combination of two or more.

Examples of the polyethylene glycol fatty acid ester type nonionic surfactant include a component selected from polyethylene glycol fatty acid monoesters and polyethylene glycol fatty acid diesters.

Examples of the polyethylene glycol fatty acid monoester include polyethylene glycol monolaurate, polyethylene glycol monostearate, polyethylene glycol monoisostearate, and polyethylene glycol monooleate.

Examples of the polyethylene glycol fatty acid diester include polyethylene glycol dilaurate, polyethylene glycol distearate, polyethylene glycol diisostearate, and polyethylene glycol dioleate.

The fatty acid in the polyethylene glycol fatty acid ester type nonionic surfactant is preferably a fatty acid having 8 to 24 carbon atoms, more preferably 10 to 10 carbon atoms, from the viewpoint of more effectively increasing the suppression of precipitation of the component A. 20 fatty acids, more preferably fatty acids with 12 to 18 carbon atoms.

The average added mole number of ethylene oxide in the polyethylene glycol fatty acid ester type nonionic surfactant is preferably 10 to 300, more preferably 12 to 250, from the viewpoint of more effectively increasing the suppression of precipitation of the component A. be.

In the present invention, among the polyethylene glycol fatty acid ester type nonionic surfactants, it is possible to use a component selected from polyethylene glycol monostearate, polyethylene glycol monoisostearate, polyethylene glycol distearate, and polyethylene glycol diisostearate. preferable.

When using a polyethylene glycol fatty acid ester type nonionic surfactant as a nonionic surfactant other than component D, the content of the polyethylene glycol fatty acid ester type nonionic surfactant in 100% by mass of the stock solution is , From the viewpoint of more effectively increasing the suppression of precipitation of component A, it is preferably 0.01 to 5.0% by mass, more preferably 0.05 to 4.0% by mass, and still more preferably 0.1 ~2.0% by mass. The above content is the total content of all polyethylene glycol fatty acid ester type nonionic surfactants contained in the stock solution.

The stock solution preferably further contains component E, a polyhydric alcohol. Component E can enhance the suppression of precipitation of component A more effectively. Only one kind of component E may be used, or two or more kinds thereof may be used.

Examples of the component E include sugar alcohols such as sorbitol, maltitol and glucosyltrehalose, ethylene glycol, diethylene glycol, triethylene glycol, propylene glycol, isoprene glycol, dipropylene glycol, polyethylene glycol, 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, polyoxyethylene methyl glucoside, polyoxypropylene methyl glucoside, etc., and sugar alcohols are used from the viewpoint of reducing the feeling of skin tension after washing and improving the foam retention. is preferably included.

The content of component E in 100% by mass of the stock solution is preferably 0.5 to 20.0% by mass, more preferably 1.0 to 15%, from the viewpoint of more effectively increasing the suppression of precipitation of component A. 0% by mass, more preferably 1.0 to 10.0% by mass. The above content is the total content of all components E contained in the stock solution.

The stock solution further contains component F: a thickening compound such as component F1: a thickening compound selected from xanthan gum and guar gum and component F2: a thickening compound selected from hydroxypropylmethylcellulose, hydroxyethylcellulose, and hydroxypropylcellulose. preferably.

The thickening compound of component F has the effect of improving foam retention. The component F may be used alone or in combination of two or more, but it is preferable to use the component F1 and the component F2 together.

The content of component F1 in 100% by mass of the stock solution is preferably 0.01 to 0.5% by mass, more preferably 0.03 to 0.4% by mass, from the viewpoint of improving foam retention. Yes, more preferably 0.05 to 0.3% by mass. The above content is the total content of all components F1 contained in the stock solution.

The content of component F2 in 100% by mass of the stock solution is preferably 0.01 to 0.5% by mass, more preferably 0.02 to 0.4% by mass, from the viewpoint of improving foam retention. Yes, more preferably 0.03 to 0.2% by mass. The above content is the total content of all components F2 contained in the stock solution.

The stock solution is not particularly limited, but may contain components (other components) other than the above components A to F. For example, fragrances; silicone oils such as cyclopentasiloxane, hydrogen dimethicone, caprylyl methicone, methylphenylpolysiloxane, dimethicone; preservatives such as phenoxyethanol, octoxyglycerin, methylparaben; menthol, menthyl glyceryl ether, camphor, peppermint oil, etc. Cooling agent; anti-inflammatory agents such as dipotassium glycyrrhizinate and stearyl glycyrrhizinate; plant extracts such as peony, botanpi, loquat, and aloe; fungicides; antioxidants such as tocopherol and dibutylhydroxytoluene; octyl methoxycinnamate, dimethoxy UV absorbers such as benzylidenedioxoimidazolidinepropionate octyl, diethylaminohydroxybenzoylhexylbenzoate, t-butylmethoxydibenzoylmethane, octyltriazone, and 2-ethylhexyl paramethoxycinnamate; chelating agents such as edetate; Whitening agents such as arbutin and ascorbic acid; powders such as silica, talc, and nylon powder;

Bactericides include, for example, isopropylmethylphenol, benzalkonium chloride, hinokitiol, triclosan, dipotassium glycyrrhizinate, and salicylic acid. Among them, isopropylmethylphenol and salicylic acid are more preferred, and salicylic acid is even more preferred. Only 1 type may be used for the said disinfectant, and 2 or more types may be used for it.

The content of the disinfectant in 100% by mass of the stock solution is preferably 0.01% by mass or more, more preferably 0.05% by mass or more, preferably 2.0% by mass or less, and more preferably is 1.0% by mass or less, more preferably 0.5% by mass or less. A bactericidal effect can be effectively obtained when the content of the bactericidal agent is at least the above lower limit. Moreover, from the viewpoint of safety, the content of the fungicide is preferably equal to or less than the above upper limit. The above content is the total amount of the content of all fungicides contained in the stock solution.

In the present invention, when a disinfectant is contained in the stock solution, the ability to form dense foam in the foam skin cleanser may be lowered, and in order to address this problem, HLB 9.0 to 13.0 is used. It was newly found that foam quality can be improved by containing a polyethylene glycol type nonionic surfactant. Although the mechanism is unknown, polyethylene glycol-type nonionic surfactants have PEG chains and have the effect of increasing the hydration layer by covering the surface of the emulsion, making the emulsion particles more stable. As a result, even in a system containing a disinfectant, it is thought that it has become possible to form foam with a better texture without impairing the foam quality.

Therefore, when the stock solution contains a disinfectant, from the viewpoint of forming dense foam, a polyethylene glycol-type nonionic surfactant with an HLB of 9.0 to 13.0, preferably an HLB of 9.5 to 12.0 It is preferable to contain together. The polyethylene glycol type nonionic surfactant with HLB 9.0 to 13.0 may contain one of the above polyethylene glycol fatty acid ester type nonionic surfactants with HLB 9.0 to 13.0, Other polyethylene glycol type nonionic surfactants with HLB of 9.0 to 13.0 may be further contained. Examples of polyethylene glycol type nonionic surfactants with HLB 9.0 to 13.0 other than polyethylene glycol fatty acid ester type nonionic surfactants include polyoxyethylene hydrogenated castor oil and polyoxyethylene castor oil. be done. The polyethylene glycol-type nonionic surfactants having an HLB of 9.0 to 13.0 may be used alone or in combination of two or more.

When the stock solution contains a bactericide, the content of the polyethylene glycol-type nonionic surfactant with an HLB of 9.0 to 13.0 in 100% by mass of the stock solution is from the viewpoint of forming firm and dense foam. Therefore, it is preferably 0.3 to 1.5% by mass, more preferably 0.5 to 1.0% by mass, and still more preferably 0.5 to 0.8% by mass. The above content is the total content of all polyethylene glycol-type nonionic surfactants with HLB of 9.0 to 13.0 contained in the stock solution.

Examples of the propellant include known propellants such as air, nitrogen, nitrous oxide, and other gases (especially compressed gas); liquefied petroleum gas (LPG) and dimethyl ether (DME). , isopentane, and liquefied gases such as fluorocarbon. Only one type of propellant may be used, or two or more types may be used.

Examples of the aerosol container include known and commonly used containers, and are not particularly limited.

In the aerosol container, the content of the propellant in the total amount of 100% by mass of the stock solution and the propellant is preferably 2.0 to 20.0% by mass from the viewpoint of preventing liquefaction of the discharge. Preferably, it is 3.0 to 15.0% by mass. When two or more propellants are used, the "propellant content" means the total amount of the individual components that make up the propellant.

The foam skin cleanser of the present invention can be produced by known methods. For example, an aerosol container is filled with a stock solution, the container is clinched by an aerosol valve, a specified amount of propellant is filled from the stem into the container, and an injection button is attached.

The foamed skin cleanser of the present invention is a skin cleanser used for cleansing the skin of the face and the like. Examples of the foam skin cleanser of the present invention include facial cleansers, hand soaps, body soaps and scalp cleansers. The foam-type skin cleanser of the present invention suppresses the feeling of tightness on the skin after cleansing and forms firm, fine-textured, dense foam. Are suitable.

EXAMPLES The present invention will be described in more detail below based on examples and the like, but the present invention is not limited only to these examples.

Examples 1-24 and Comparative Examples 1-2
After filling an aerosol container (φ35 mm × 105 mm, aluminum can, container full filling amount: 91 ml) with 95 parts by mass of the stock solution having the composition described in Tables 1 to 4, clinching the aerosol valve into the container, it is liquefied as a propellant. 5 parts by mass of petroleum gas (LPG) was filled from the stem, and a suitable spout was attached to obtain a foam skin cleanser. The total amount of the stock solution and propellant filled in the aerosol container was 50 g.

Details of each raw material in Examples, Comparative Examples, and Formulation Examples are as follows. It should be noted that the amounts shown in Tables 1 to 4 represent "% by mass" unless otherwise specified, and are not the amount of the product, but the amount of each component (amount of active ingredient).

Myristic acid: EDENOR C14-99 (manufactured by Emery Oleochemicals)
Palmitic acid: EDENOR C14-99 (manufactured by Emery Oleochemicals)
Hexa(hydroxystearic acid/stearic acid/rosin acid) dipentaerythrityl: Cosmol 168ARV (manufactured by Nisshin OilliO Group)
Tetra (hydroxystearic acid/isostearic acid) dipentaerythrityl: Cosmol 168EV (manufactured by Nisshin OilliO Group)
Dipentaerythrityl hexahydroxystearate: Cosmol 168M (manufactured by Nisshin Oillio Co., Ltd.)
Coconut oil fatty acid sorbitan: Rheodol Super SP-L10 (manufactured by Kao Corporation)
Polyoxyethylene sorbitan monostearate: Rhodol TW-S120V (manufactured by Kao Corporation: average added mole number of ethylene oxide: 20)
Dipropylene glycol: Dipropylene glycol DPG-FC (manufactured by Asahi Glass Co., Ltd.)
Polyethylene glycol: PEG-1500 (manufactured by Sanyo Chemical Industries, Ltd.: number average molecular weight 1500)
Sorbitol: Sorbitol L-70 (manufactured by Mitsubishi Corporation Foodtech)
Maltitol: LYCASIN75/77 (manufactured by ROQUETTE)
Glucosyl trehalose: Tornare (manufactured by Hayashibara)
Xanthan gum: Echo Gum T (manufactured by DSP Gokyo Food & Chemical Co., Ltd.)
Guar gum: Supergel CSA200/50 (manufactured by Sansho)
Hydroxypropyl cellulose: HPC-H (manufactured by Nippon Soda Co., Ltd.)
Hydroxypropyl methylcellulose: Metolose 60SH-4000 (manufactured by Shin-Etsu Chemical Co., Ltd.)
Hydroxyethyl cellulose: HEC CF-W (Sumitomo Seika Co., Ltd.)
Triethanolamine: TEA-99 (manufactured by Japan Chemtech)
Polyethylene glycol monostearate: Emanone 3199VB (manufactured by Kao Corporation: average added mole number of ethylene oxide: 150)
Isopropyl myristate: Excepar IPM (manufactured by Kao Corporation)
Polyethylene glycol monostearate 1: Emanone 3199VB (manufactured by Kao Corporation: average added mole number of ethylene oxide: 150, HLB: 19.4)
Polyoxyethylene hydrogenated castor oil: Braunon RCW-20 (manufactured by Aoki Yushi Co., Ltd., average added mole number of ethylene oxide: 20, HLB: 9.7)
Polyethylene glycol monostearate 2: NIKKOL YMS-10V (manufactured by Nikko Chemicals Co., Ltd.: average added mole number of ethylene oxide: 10, HLB: 11.0)

[Detergency]
A commercially available liquid foundation was spread about 3 cm in diameter on a white uneven surface made of urethane. The foam was rubbed with to spread it in a circular shape, and after washing with hot water at 40° C., the degree of stain removal was visually evaluated. In addition, the visual evaluation was compared with the makeup-stained state that was simply rinsed off with warm water. The results are shown in Tables 1-3. Although the description in the table is omitted for Examples 19 to 24, all evaluations were ⊚ (very good).
◎ (very good): dirt is completely removed ○ (good): dirt is almost removed, but the dirt is slightly removed △ (insufficient): dirt is slightly removed However, most of the dirt remains × (Poor): The state that dirt remains completely (similar to the state of just washing with warm water)

The foam of the foam skin cleanser of each example and each comparative example was discharged for 1 second in a dome shape onto Kimtowel (four-fold type: manufactured by Nippon Paper Crecia Co., Ltd.). Then, from a distance of 20 cm from the upper end of the foam discharged in the dome shape, 2 pushes of purified water filled in a pump container (spray discharge amount: 0.5 mL/1 push) were sprayed over the entire foam, and after 30 seconds , the surface of the foam was lightly pressed with a fingertip, and sensory evaluation was performed for "foam resilience" and "foam quality (foam density)" according to the following 1 to 4 evaluation points. The evaluation was performed by an evaluation panel of 10 people, and the result of the evaluation point (score) obtained by the largest number of people was taken as the result of each sample. The results are shown in Tables 1-4.

[Foam Elasticity]
◎ (Evaluation point 4: very good): The foam does not collapse easily with the fingertips, and a strong elasticity that pushes back the fingertips is felt ○ (Evaluation point 3: good): The bubbles do not collapse easily with the fingertips, Feels elastic enough to push back the fingertips △ (Rating point 2: insufficient): Feels a little elastic like pushing back the fingertips, but the foam collapses on the fingertips × (Rating point 1: poor): Easy to use with the fingertips The foam collapses and you don't feel any elasticity that pushes your fingertips back.

[Foam quality (foam density)]
◎ (Evaluation point 4: very good): Uniform and fine bubbles are formed, and very dense bubbles are formed ○ (Evaluation point 3: good): Non-uniform but fine bubbles △ (evaluation point 2: insufficient): large bubbles are mixed and dense foam is formed × (evaluation point 1: poor): dense foam is not formed at all (gas is discharged in a separated state)

[Bubble retention]
The foam of the foam skin cleanser of each example and each comparative example was discharged for 1 second in a dome shape onto Kimtowel (four-fold type: manufactured by Nippon Paper Crecia Co., Ltd.). Then, from a distance of 20 cm from the upper end of the foam discharged in the dome shape, 2 pushes of purified water filled in a pump container (spray discharge amount: 0.5 mL/1 push) were sprayed over the entire foam, and after 30 seconds The "foam shape" and "fineness of the foam" were visually confirmed, and the "foam stickiness" was evaluated according to the following 1 to 4 evaluation points. The evaluation was performed by an evaluation panel of 10 people, and the result of the evaluation point (score) obtained by the largest number of people was taken as the result of each sample. The results are shown in Tables 1-4.
◎ (Evaluation point 4: very good): The foam shape immediately after ejection is maintained, and the texture of the foam surface is fine ○ (Evaluation point 3: good): The texture of the foam surface is slightly rough, but ejection The foam shape immediately after ejection is maintained Δ (Evaluation point 2: insufficient): Large bubbles are observed on the foam surface, and the foam shape immediately after ejection is beginning to collapse slightly × (Evaluation point 1: poor): Immediately after ejection Bubble shape clearly collapsed

[Skin condition after cleansing (no tightness)]
After having their faces washed away with warm water at 40°C, they were asked to actually wash their faces using the foam-type skin cleanser of each example and each comparative example, apply foam to their cheeks, and draw a circular motion. It was spread out, rinsed again with warm water at 40°C, and sensory evaluation was carried out on the feel after drying with a towel (remaining feeling on the skin), and a score was given according to the following evaluation points of 1 to 4 points. The evaluation was performed by an evaluation panel of 10 people, and the result of the evaluation point (score) obtained by the largest number of people was taken as the result of each sample. The results are shown in Tables 1-4.
◎ (Evaluation point 4: very good): Very high moist residual feeling ○ (Evaluation point 3: good): High moist residual feeling △ (Evaluation point 2: insufficient): Moist residual feeling Low skin feeling and high tightness × (Evaluation point 1: Poor): No moist residue at all, very high skin tightness

From Tables 1 to 4, the foam skin cleansers of Examples 1 to 24 containing Component A, Component B, Component C, and Component D had detergency, foam elasticity, foam quality (foam density), foam It was excellent in all aspects of the skin condition (absence of taut feeling) after washing. On the other hand, the foam skin cleansers of Comparative Example 1, which does not contain component B, and Comparative Example 2, which does not contain component D, could not form dense foam. Further, as shown in Examples 3 and 19 to 24, in the system containing the disinfectant, the foam of Examples 22 and 23 containing a polyethylene glycol type nonionic surfactant with HLB of 9.0 to 13.0 It turns out that quality is preferred.

Formulation examples of the foam skin cleanser according to the present invention are shown below. In addition, the compounding quantity is "mass %."

Formulation example 1:
(Undiluted solution)
Myristic acid 2.00
Palmitic acid 1.00
Stearic acid 1.00
Triethanolamine 2.90
1,3 butylene glycol 2.00
Polyethylene glycol 2.00
Xanthan gum 0.15
Hydroxypropyl methylcellulose 0.05
Diisopropyl adipate *1 1.00
Hexa(hydroxystearate/stearate/rosinate) dipentaerythrityl
1.00
Coconut fatty acid sorbitan 1.00
Polyoxyethylene (20) sorbitan monostearate 1.50
Polyethylene glycol monostearate 1.00
Sorbitol 2.00
Purified water Balance
Total 100.00

(propellant)
Liquefied petroleum gas (LPG) 100.00
Total 100.00

Stock solution 95.00
Propellant 5.00
Total 100.00
*1) Diisopropyl adipate: Matlube DIA (manufactured by Seiwa Kasei Co., Ltd.)

Formulation example 2:
(Undiluted solution)
Myristic acid 3.00
Triethanolamine 2.35
Dipropylene glycol 4.00
Concentrated glycerin 1.00
Xanthan gum 0.15
Hydroxypropyl cellulose 0.10
Diisobutyl adipate *2 1.00
Tetra(hydroxystearate/isostearate) dipentaerythrityl
1.00
Coconut fatty acid sorbitan 1.00
Polyoxyethylene (20) sorbitan monostearate 0.75
Polyethylene glycol distearate 0.50
Sorbitol 2.00
Purified water Balance
Total 100.00

(propellant)
Liquefied petroleum gas (LPG) 100.00
Total 100.00

Stock solution 96.00
Propellant 4.00
Total 100.00
*2) Diisobutyl adipate: Mattlube DIBA (manufactured by Seiwa Kasei Co., Ltd.)

Formulation example 3:
(Undiluted solution)
Myristic acid 3.00
Palmitic acid 1.00
Triethanolamine 3.05
Dipropylene glycol 4.00
Xanthan gum 0.15
Hydroxyethyl cellulose 0.10
Isopropyl myristate 1.00
Dipentaerythrityl hexahydroxystearate 1.00
Coconut fatty acid sorbitan 0.50
Polyoxyethylene (20) sorbitan monostearate 0.50
Polyethylene glycol diisostearate 0.50
Maltitol 2.00
Purified water Balance
Total 100.00

(propellant)
Liquefied petroleum gas (LPG) 100.00
Total 100.00

Stock solution 94.00
Propellant 6.00
Total 100.00

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

Claims (8)

A foam skin cleanser in which a stock solution and a propellant are packed in an aerosol container, wherein the stock solution contains 0.1 to 10.0% by mass of component A and 0.01 to 4.0 % by mass of component B below. % , 0.1 to 5.0% by mass of component B', 60.0 to 98.0% by mass of component C , 0.05 to 5.0% by mass of component D, and 0.01% by mass of component D' ~5.0% by mass, 0.5 to 20.0% by mass of Component E, Component F, and Component G.
Component A: Higher fatty acid and/or its salt Component B: Fatty acid ester oil solid at room temperature
Component B': Fatty acid ester oil that is liquid at room temperature
Component C: Water Component D: Sorbitan fatty acid ester type nonionic surfactant
Component D': nonionic surfactant other than component D
Component E: polyhydric alcohol
Component F: Thickening compound
Ingredient G: Fungicide The claim characterized in that said component B comprises a component selected from hexa(hydroxystearic acid/stearic acid/rosin acid) dipentaerythrityl, tetra(hydroxystearic acid/isostearate) dipentaerythrityl, and hexahydroxystearate dipentaerythrityl. 2. The foam skin cleanser according to 1. 3. The foam skin cleanser according to claim 1 or 2, wherein said component D comprises a component selected from sorbitan coconut oil fatty acid, sorbitan palmitate, and polyoxyethylene sorbitan monostearate. The foam skin cleanser according to any one of claims 1 to 3 , wherein said component E contains a sugar alcohol. 5. The foam skin cleanser according to any one of claims 1 to 4, wherein said component F comprises component F1 and/or component F2 below.
Component F1: Thickening compound selected from xanthan gum and guar gum Component F2: Thickening compound selected from hydroxypropylmethylcellulose, hydroxyethylcellulose and hydroxypropylcellulose Foam according to any one of claims 1 to 5 , characterized in that the fungicide comprises a component selected from isopropylmethylphenol, benzalkonium chloride, hinokitiol, triclosan, dipotassium glycyrrhizinate and salicylic acid. skin cleanser. The foam skin cleanser according to any one of claims 1 to 6 , wherein said stock solution further contains a polyethylene glycol type nonionic surfactant with HLB of 9.0 to 13.0. 8. The method according to claim 7 , wherein the polyethylene glycol-type nonionic surfactant having an HLB of 9.0 to 13.0 comprises a component selected from polyoxyethylene hydrogenated castor oil and polyoxyethylene castor oil. Foam skin cleanser.