JP7121476B2 - 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. Further, when used in an aerosol-type foamer container, there is a risk that the higher fatty acid salt will precipitate and cause discharge failure, so it is necessary to take measures to suppress the precipitation. 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 contains a higher fatty acid and/or a salt thereof and that suppresses the skin's taut feeling after cleansing and precipitation of the higher fatty acid.

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 liquid at room temperature Component C: Water Component D: Polyethylene glycol fatty acid ester type nonionic surfactant

According to the present invention, it is possible to provide a foam-type skin cleanser that contains a higher fatty acid and/or a salt thereof and yet gives the skin a taut feeling after cleansing and suppresses precipitation of the higher fatty acid.

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 during use, that is, when discharged from an aerosol container and/or after adhering to a subject. Each constituent component of the foam-type skin cleanser of the present invention is described below.

The stock solution contains component A: higher fatty acid and/or salt thereof, component B: fatty acid ester oil that is liquid at room temperature, component C: water, and component D: polyethylene glycol 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 of 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 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 It was newly found that component B has the effect of suppressing skin tightness after cleansing and further suppressing precipitation of component A. Only one kind of component B may be used, or two or more kinds thereof may be used.

Examples of component B include an ester oil of a straight-chain fatty acid and a branched lower alcohol, an ester oil of a straight-chain fatty acid and a straight-chain higher alcohol, an ester oil of a straight-chain fatty acid and a branched higher alcohol, and a branched fatty acid and a straight-chain A component selected from an ester oil of a 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 component B, from the viewpoint of suppressing the feeling of skin tension after washing and further suppressing the precipitation of the component A, an ester oil of a straight chain fatty acid and a branched lower alcohol, and a straight chain fatty acid. It is preferable to use a component selected from ester oils of branched higher alcohols, ester oils of branched fatty acids and linear higher alcohols, ester oils of branched fatty acids and branched higher alcohols, and ester oils of dibasic acids. It is more preferable to use a component selected from isopropyl, octyldodecyl myristate, 2-ethylhexyl palmitate, cetyl 2-ethylhexanoate, isononyl isononanoate, diisobutyl adipate, and diisopropyl adipate.

The content of component B 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 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 component B contained in the stock solution.

In addition to component B, the liquid concentrate may optionally further contain 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. The fatty acid ester oil, which is solid at room temperature, has the effect of suppressing the feeling of tightness of the skin after cleansing and forming firm and dense foam with fine texture. Only one type of fatty acid ester oil that is solid at room temperature may be used, or two or more types may be used.

Examples of fatty acid ester oils that are solid at room temperature include hexa(hydroxystearic acid/stearic acid/rosin acid) dipentaerythrityl, tetra(hydroxystearic acid/isostearate) dipentaerythrityl, and hexahydroxystearate dipentaerythrityl.

The content of the fatty acid ester oil solid at room temperature 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 further It is 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 amount of all fatty acid ester oils that are solid at room temperature 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 polyethylene glycol fatty acid ester type nonionic surfactant. Component D can enhance the suppression of precipitation of component A more effectively. It also exhibits the effect of forming dense foam with a high foam density and improving the foam retention of the foam. 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 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 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 increasing the suppression of precipitation of component A. are 12-18 fatty acids.

The average number of added moles of ethylene oxide in component D is preferably 10 to 300, more preferably 12 to 250, from the viewpoint of more effectively suppressing precipitation of component A.

In the present invention, among component D, it is preferable to use a component selected from polyethylene glycol monostearate, polyethylene glycol monoisostearate, polyethylene glycol distearate, and polyethylene glycol diisostearate.

The content of component D in 100% by mass of the stock solution is preferably 0.01 to 5.0% by mass, more preferably 0.05 to 4, from the viewpoint of more effectively increasing the suppression of precipitation of component A. 0% by mass, more preferably 0.1 to 2.0% by mass. The above content is the total content of all component D contained in the stock solution.

In addition to component D above, the stock solution may optionally further contain a nonionic surfactant such as a sorbitan fatty acid ester type nonionic surfactant. For example, sorbitan fatty acid ester-type nonionic surfactants are effective in forming firm and dense foam. Nonionic surfactants other than component D may be used alone, or may be used in combination of two or more.

Examples of the sorbitan fatty acid ester-type nonionic surfactant include components selected from sorbitan fatty acid esters and ethylene oxide condensates of sorbitan fatty acid esters.

Examples of the sorbitan fatty acid esters 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 the sorbitan fatty acid ester type nonionic surfactant is preferably a fatty acid having 8 to 24 carbon atoms, more preferably 10 carbon atoms, from the viewpoint of more effectively exhibiting firm and dense foam formation. ~20 fatty acids, more preferably 12-18 carbon atoms.

When the sorbitan fatty acid ester-type nonionic surfactant is an ethylene oxide condensate, the average number of added moles of ethylene oxide is preferably 5 to 5 from the viewpoint of more effectively exhibiting firm and dense foam formation. 200, more preferably 6-150.

In the present invention, among the above sorbitan fatty acid ester type nonionic surfactants, sorbitan monopalmitate, sorbitan coconut oil fatty acid, poly monopalmitate, 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 monostearate, polyoxyethylene sorbitan monoisostearate, polyoxyethylene sorbitan tristearate, and polyoxyethylene sorbitan trioleate, and sorbitan coconut oil fatty acid , and polyoxyethylene sorbitan monostearate.

When using a sorbitan fatty acid ester-type nonionic surfactant as a non-ionic surfactant other than component D, the content of the sorbitan fatty acid ester-type nonionic surfactant in 100% by mass of the stock solution is strictly From the viewpoint of forming dense foam with a % by mass. The above content is the total content of all sorbitan 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 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 cleansing and improving 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 agents; anti-inflammatory agents such as dipotassium glycyrrhizinate and stearyl glycyrrhizinate; plant extracts such as peony, botanpi, loquat, and aloe; fungicides such as isopropylmethylphenol and triclosan; antioxidants such as tocopherol and dibutylhydroxytoluene UV absorbers such as octyl methoxycinnamate, dimethoxybenzylidenedioxoimidazolidine propionate octyl, diethylaminohydroxybenzoyl hexyl benzoate, t-butylmethoxydibenzoylmethane, octyltriazone, 2-ethylhexyl paramethoxycinnamate; edet chelating agents such as acid salts; whitening agents such as arbutin and ascorbic acid; powders such as silica, talc, nylon powder, and the like.

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 is suitable for use as a cleanser for delicate areas, such as a facial cleanser, since it gives the skin a feeling of tightness after cleansing and suppresses precipitation of higher fatty acids.

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 1-20 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.

The details of each raw material in Examples and Comparative 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)
Isopropyl myristate: Excepar IPM (manufactured by Kao Corporation)
Isononyl isononanoate: Salacos 99 (manufactured by Nisshin OilliO Group)
2-ethylhexyl palmitate: Koyo POC (manufactured by Koyo Fine Chemicals Co., Ltd.)
Cetyl 2-ethylhexanoate: Salacos 816T (manufactured by Nisshin OilliO Group)
Octyldodecyl myristate: Excepar OD-M (manufactured by Kao Corporation)
Polyethylene glycol monostearate: Emanone 3199VB (manufactured by Kao Corporation: average added mole number of ethylene oxide: 150)
Polyethylene glycol monoisostearate: EMALEX PEIS-12EX (manufactured by Nippon Emulsion Co., Ltd.: average number of added moles of ethylene oxide: 12)
Polyethylene glycol distearate: Emanone 3299RV (manufactured by Kao Corporation: average added mole number of ethylene oxide: 250)
Polyethylene glycol diisostearate: EMALEX 6000di-ISEX (manufactured by Nippon Emulsion Co., Ltd.: average number of added moles of ethylene oxide: 12)
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)
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)
Coconut oil fatty acid sorbitan: Rheodol Super SP-L10 (manufactured by Kao Corporation)
Polyoxyethylene sorbitan monostearate: Rheodol TW-S120V (manufactured by Kao Corporation: average added mole number of ethylene oxide: 20)
Hexa(hydroxystearic acid/stearic acid/rosin acid) dipentaerythrityl: Cosmol 168ARV (manufactured by Nisshin OilliO Group)

[Precipitation suppression of higher fatty acids]
The stock solution and propellant obtained in each example and each comparative example were filled in a transparent pressure-resistant bottle and stored in a constant temperature bath at 2°C. After one week, the state of the undiluted solution was visually observed to evaluate the presence or absence of precipitation. The results are shown in Tables 1-4.
○ (Good): No precipitation of crystals or gel-like substances was observed in the stock solution △ (Insufficient): Precipitation of gel-like substances was confirmed, although it did not affect clogging × (Poor): Clogging A crystal deposit of a size and amount expected to cause concern was confirmed

[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 1-4.
◎ (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.

[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 top of the foam discharged in the dome shape, purified water filled in a pump container (spray discharge amount: 0.5 mL / 1 push) was sprayed 2 times 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 cleansing agents of Examples 1 to 20 containing Component A, Component B, Component C, and Component D have a higher fatty acid precipitation suppression, detergency, foam elasticity, foam retention, and cleansing. All of the post-treatment skin conditions (absence of tautness) were excellent. On the other hand, in the foam skin cleansers of Comparative Example 1, which does not contain component B, and Comparative Example 2, which does not contain component D, precipitation of higher fatty acids was observed.

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*3 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
*3) Maltitol: LYCASIN75/77 (manufactured by ROQUETTE)

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

Claims (10)

A foam skin cleanser in which an aerosol container is filled with a stock solution and a propellant, wherein the stock solution contains 1.0 to 8.0% by mass of component A and 0.1 to 5.0% by mass of component B below. %, 60.0 to 98.0% by mass of component C, 0.05 to 4.0% by mass of component D, component E, and component F.
Component A: Higher fatty acid and/or salt thereof Component B: Fatty acid ester oil that is liquid at room temperature Component C: Water Component D: Polyethylene glycol fatty acid ester type nonionic surfactant Component E: Polyhydric alcohol Component F: Thickening compound 2. The foam skin cleanser according to claim 1, wherein the content of said component A in said stock solution is 2.5 to 8.0% by mass. Component B is an ester oil of a straight chain fatty acid and a branched lower alcohol, an ester oil of a straight chain fatty acid and a branched higher alcohol, an ester oil of a branched fatty acid and a branched higher alcohol, an ester of a branched fatty acid and a branched higher alcohol. 3. The foam skin cleanser according to claim 1 or 2 , comprising a component selected from oils and dibasic acid ester oils. Claim 1, wherein said component B comprises a component selected from isopropyl myristate, octyldodecyl myristate, ethylhexyl palmitate, cetyl ethylhexanoate, isononyl isononanoate, diisobutyl adipate, and diisopropyl adipate. 4. The foam skin cleanser according to any one of -3 . Claims 1 to 4 , wherein the component D comprises a component selected from polyethylene glycol monostearate, polyethylene glycol monoisostearate, polyethylene glycol distearate, polyethylene glycol diisostearate, and polyethylene glycol laurate. A foam skin cleanser according to any one of the preceding claims. The foam skin cleanser according to any one of claims 1 to 5 , wherein said stock solution contains 0.5 to 20.0% by mass of said component E. The foam skin cleanser according to any one of claims 1 to 6 , wherein said component E contains a sugar alcohol. The foam skin cleanser according to any one of claims 1 to 7 , wherein said component F contains 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 9. The foam skin cleanser according to claim 8 , wherein said stock solution contains 0.01 to 0.5% by mass of said component F1. 10. The foam skin cleanser according to claim 8 or 9 , wherein said stock solution contains 0.01 to 0.5% by mass of said component F2.