Foamy cleanser composition

Abstract

To provide a foamy detergent composition that is easy to rinse and has a good moist feeling after rinsing, capable of forming long-lasting, dense foam.SOLUTION: A foamy detergent composition is sealed in a pressure-resistant container having an aerosol valve and a nozzle, the composition containing (a) component of 1-15 mass%, (b) component of 0.1-10 mass%, and (c) component of 0.1-5 mass%, and further containing (d) component, illustrated below: (a) an acylamino acid salt-type anionic surfactant, (b) a polyoxyethylene sorbitan mono fatty acid ester with an average number of moles of added ethylene oxide being 60 mol-100 mol, (c) an alkylene oxide-added derivative represented by the formula (1): MG-[O(EO) x(PO) y(BO) zH]4 (MG is a residue of methyl glucoside from which a hydroxy group has been removed, EO is an oxyethylene group, PO is an oxypropylene group, x and y each represent an average number of moles of added EO and PO, where 0≤x≤5, 0≤y≤2.5, 1≤x+y≤7.5; BO is an oxybutylene group and z is an average number of moles of added BO, where 0≤z≤1), as well as (d) a propellant.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to a foam cleanser composition that has good rinsing properties, leaves skin feeling moisturized after rinsing, and is capable of forming dense foam with excellent foam retention. [Background technology]

[0002] Cleansing agents such as face wash, hand soap, and body soap are applied to the body in foam form when used. While liquid cleansers require lathering, foams have the advantage that the user does not need to lather them and the required amount of foam can be dispensed with a single push. Foamy detergents that take advantage of this feature include pump formers, which have a porous membrane inside and create foam when the detergent mixes with air as it passes through the membrane, and foamy detergents that are made by sealing a concentrate equivalent to the detergent and a propellant in an aerosol container. In particular, foam detergents packed in aerosol containers contain, for example, anionic surfactants in their concentrates, and liquefied petroleum gas (LPG) or the like is used as the propellant.

[0003] While these foam cleansers can be easily dispensed in foam form, they have the problem of leaving foam on the skin when rinsed off, making rinsing difficult, and leaving the skin feeling less moisturized after rinsing. Therefore, the above problem has been solved by combining an anionic surfactant with other ingredients. For example, Patent Document 1 proposes a massage pack facial cleanser composition that uses an anionic surfactant, a nonionic surfactant, a higher alcohol, and a propellant. However, although the composition has excellent rinsing properties, it has the problem of not leaving the skin feeling moisturized after rinsing.

[0004] Therefore, Patent Document 2 proposes an aerosol-type pack cosmetic that uses an anionic surfactant, a polyhydric alcohol, polyvinylpyrrolidone, and silicone oil. However, although the cosmetic has excellent rinsing properties and provides a moist feeling after rinsing, the persistence of foam has not been sufficiently investigated. When foam cleaners that use propellants have poor foam retention or produce coarse foam, the foam breaks during cleaning, causing a crackling sensation due to the heat of vaporization of the propellant. For this reason, there has been a demand for foam cleaners that produce dense foam with good foam retention.

[0005] From this perspective, Patent Document 3 proposes an aerosol foam pack cosmetic that uses an anionic surfactant, a water-soluble polymer, a nonionic surfactant, and arbutin, and that has excellent rinsing properties, a moist feeling after rinsing, and foam retention. However, sufficient research has not yet been conducted into the density of the foam. Therefore, there has been a demand for a foam cleanser composition that has good rinsing properties, leaves the skin feeling moisturized after rinsing, and is capable of forming dense foam with excellent foam retention. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Laid-Open No. 2013-023493 [Patent Document 2] Japanese Patent Application Laid-Open No. 2008-037773 [Patent Document 3] Japanese Patent Application Publication No. 2018-65774 Summary of the Invention [Problem to be solved by the invention]

[0007] An object of the present invention is to provide a foam cleanser composition that has good rinsing properties, leaves skin feeling moisturized after rinsing, and can form dense foam with excellent foam retention. [Means for solving the problem]

[0008] In view of the above problems, the present inventors have conducted extensive research and have found that the above problems can be solved by a foam detergent composition enclosed in a pressure-resistant container equipped with an aerosol valve and a nozzle, the foam detergent composition containing specific amounts of (a) an acylamino acid salt-type anionic surfactant, (b) a polyoxyethylene sorbitan mono-fatty acid ester having an average number of added moles of ethylene oxide of 60 to 100 moles, and (c) an alkylene oxide addition derivative represented by formula (1), and (d) a propellant. That is, the present invention relates to the following [1].

[0009] [1] A foam detergent composition enclosed in a pressure-resistant container equipped with an aerosol valve and a nozzle, the foam detergent composition containing 1 to 15 mass% of component (a), 0.1 to 10 mass% of component (b), 0.1 to 5 mass% of component (c), and further containing component (d): (a) Anionic surfactants of acylamino acid salt type (b) Polyoxyethylene sorbitan mono-fatty acid ester having an average added mole number of ethylene oxide of 60 to 100 moles (c) Alkylene oxide adduct represented by formula (1) MG-[O(EO)x(PO)y(BO)zH]4...Equation (1) (MG is a residue obtained by removing a hydroxyl group from methyl glucoside, EO is an oxyethylene group, PO is an oxypropylene group, x and y are the average number of moles of EO and PO added, respectively, and are 0≦x≦5, 0≦y≦2.5, and 1≦x+y≦7.5. BO is an oxybutylene group, and z is the average number of moles of BO added, and is 0≦z≦1.) (d) Propellant [Effects of the Invention]

[0010] According to the present invention, it is possible to provide a foam cleanser composition that has good rinsing properties, leaves skin feeling moisturized after rinsing, and is capable of forming dense foam with excellent foam retention. DETAILED DESCRIPTION OF THE INVENTION

[0011] Hereinafter, embodiments of the present invention will be described in detail. In this specification, numerical ranges defined using the symbol "to" are inclusive of the numerical values ​​at both ends (upper and lower limits) of the symbol "to." For example, "2 to 5" means 2 or more and 5 or less. The foam cleanser composition of the present invention contains the following components (a), (b), (c) and (d), each of which will be described below.

[0012] [(a) Acylamino acid salt type anionic surfactant [component (a)]] The component (a) used in the present invention is an anionic surfactant of the acylamino acid salt type. An acylamino acid salt type anionic surfactant can be obtained by converting an amide compound in which the hydrogen of the amino group of an acidic or neutral amino acid (or its derivative) is substituted with an acyl group into a salt of an atom or group capable of forming a counter ion. The acyl group has, for example, 8 to 22 carbon atoms and may have either a linear or branched structure, and may be either a saturated or unsaturated acyl group. Examples of the acidic or neutral amino acid (or a derivative thereof) include glycine, sarcosine, alanine, N-methylalanine, β-alanine, glutamic acid, aspartic acid, taurine, and N-methyltaurine. Examples of the atom or group that can form the counter ion include a hydrogen atom, an alkali metal, an alkaline earth metal, ammonium, a substituted ammonium, a group derived from an amino acid (basic amino acid, acidic amino acid, and neutral amino acid) or an alkali metal salt thereof, a group derived from taurine or an alkali metal salt thereof, etc. Specific examples include sodium, potassium, 1 / 2 calcium, 1 / 2 magnesium, ammonium, triethanolamine, lysine, arginine, sodium glycine, potassium glycine, disodium glutamate, sodium taurine, sodium N-methyl taurine, etc.

[0013] Specific examples of such acylamino acid salt-type anionic surfactants include sodium coconut oil fatty acid acyl glutamate, potassium coconut oil fatty acid acylaspartate, sodium coconut oil fatty acid acylglycine, potassium coconut oil fatty acid acylglycine, sodium lauroyl sarcosinate, sodium lauroyl-N-methylalanine, sodium lauroyl-β-alanine, N-coconut oil fatty acid acyl-L-glutamate triethanolamine, and sodium N-coconut oil fatty acid acylmethyl taurate.

[0014] Among these, from the viewpoint of the effect of imparting foam elasticity, preferred acyl groups include acyl groups having a straight chain structure and having 10 to 18 carbon atoms, preferred acidic or neutral amino acids (or derivatives thereof) include glycine, sarcosine, alanine, N-methylalanine, taurine, and N-methyltaurine, and preferred atoms or groups capable of forming counter ions include sodium, potassium, sodium glycine, potassium glycine, sodium taurine, potassium taurine, triethanolamine, and the like. Specific preferred acylamino acid salt type anionic surfactants include sodium coconut oil fatty acid acylglycinate, N-coconut oil fatty acid acyl-L-glutamic acid triethanolamine, sodium lauroyl-N-methylalanine, sodium lauroyl-β-alanine, sodium N-coconut oil fatty acid acylmethyl taurate, etc. Among these, sodium lauroyl-N-methylalanine and sodium N-coconut oil fatty acid acylmethyl taurate are preferred as acylamino acid salt type anionic surfactants.

[0015] As the component (a), one or more types selected from the above-mentioned acylamino acid salt type anionic surfactants can be used. The content of component (a) in the foam cleanser composition of the present invention is 1 to 15 mass%, preferably 3 to 12 mass%, more preferably 4 to 9 mass%, and even more preferably 4 to 7 mass%. If the content of component (a) is too high, the moist feeling after rinsing may decrease, while if the content of component (a) is too low, the foam density and rinsability may decrease.

[0016] [(b) Polyoxyethylene sorbitan mono-fatty acid ester having an average number of added moles of ethylene oxide of 60 to 100 moles [component (b)]] The polyoxyethylene sorbitan monofatty acid ester, which has an average added mole number of ethylene oxide of 60 to 100 moles and is contained as component (b) in the foam cleanser composition of the present invention, is a nonionic surfactant obtained by adding ethylene oxide to a sorbitan fatty acid ester, which is a partial ester of sorbitan and a fatty acid. The sorbitan fatty acid ester to which ethylene oxide is added can be synthesized as a monoester, diester, or triester by changing the content ratio of sorbitan to fatty acid during synthesis, but the sorbitan fatty acid ester used as a starting material in the synthesis of component (b) preferably contains a monoester as the main component (50% by mass or more).When a polyoxyethylene sorbitan fatty acid ester obtained from a sorbitan fatty acid ester containing a diester or triester as the main component is used as a starting material, the foam quality of the foam cleanser composition may be reduced.

[0017] The average number of moles of ethylene oxide added in the component (b) is 60 to 100 moles, preferably 65 to 95 moles, and more preferably 70 to 90 moles. If the average number of moles of ethylene oxide added in component (b) is less than 60, foam retention will be reduced and sufficient moisturizing feeling after rinsing will not be obtained. On the other hand, if the average number of moles of ethylene oxide added in component (b) is more than 100, the viscosity will be significantly increased when dissolved in water, etc., and handling will be poor, making industrial production of the cleanser difficult and also making it difficult to dispense from the container. In component (b), the fatty acid that forms a partial ester with sorbitan is not particularly limited, but examples include saturated or unsaturated, straight-chain or branched-chain fatty acids having 8 to 22 carbon atoms, such as caprylic acid, capric acid, lauric acid, myristic acid, palmitic acid, stearic acid, oleic acid, isostearic acid, and behenic acid. Saturated straight-chain fatty acids having 10 to 14 carbon atoms, such as capric acid, lauric acid, and myristic acid, are preferred, with lauric acid being the most preferred. Fatty acids derived from natural oils and fats, such as coconut oil and palm kernel oil, which contain lauric acid as the main component, and mixed fatty acids can also be suitably used.

[0018] The polyoxyethylene sorbitan monofatty acid ester contained as component (b) in the foam cleanser composition of the present invention can be produced by a known esterification reaction and ethylene oxide addition reaction, but it is also possible to use commercially available products from various companies, such as "Nonion LT-280" (manufactured by NOF Corporation) (average number of moles of ethylene oxide added: 80). In the foam cleanser composition of the present invention, the above-mentioned polyoxyethylene sorbitan monofatty acid esters can be used alone or in combination of two or more. The content of component (b) in the foam cleanser composition of the present invention is 0.1 to 10% by mass, preferably 1 to 9% by mass, and more preferably 3 to 7% by mass. If the content of component (b) is too high, rinsing performance may be reduced, whereas if the content of component (b) is too low, foam density, foam retention, and moisturizing feeling may be reduced.

[0019] [(c) Alkylene oxide adduct derivative represented by formula (1) [component (c)]] The alkylene oxide adduct derivative represented by formula (1) contained as component (c) in the foamy cleanser composition of the present invention can be one or more derivatives selected from the multiple derivatives encompassed by formula (1). MG-[O(EO)x(PO)y(BO)zH]4...Equation (1) (MG is a residue obtained by removing a hydroxyl group from methyl glucoside, EO is an oxyethylene group, PO is an oxypropylene group, x and y are the average number of moles of EO and PO added, respectively, and are 0≦x≦5, 0≦y≦2.5, and 1≦x+y≦7.5. BO is an oxybutylene group, and z is the average number of moles of BO added, and is 0≦z≦1.)

[0020] In formula (1), MG is a residue obtained by removing a hydroxyl group from methyl glucoside, EO is an oxyethylene group, PO is an oxypropylene group, and BO is an oxybutylene group. x, y, and z are the average number of moles of EO, PO, and BO added, respectively, and are 0≦x≦5, 0≦y≦2.5, and 0≦z≦1, preferably 0≦x≦2.5, 0≦y≦2.5, and 0≦z≦0.25, and more preferably x=0, 2≦y≦5, and z=0. Furthermore, 1≦x+y≦7.5, preferably 2≦x+y≦5, and more preferably 2≦x+y≦3. Commercially available products of component (c) include "Macbiobride MG-10E" (manufactured by NOF Corporation; in formula (1), x=2.5, y=0, z=0), "Macbiobride MG-20E" (manufactured by NOF Corporation; in formula (1), x=5, y=0, z=0), "Macbiobride MG-10P" (manufactured by NOF Corporation; in formula (1), x=0, y=2.5, z=0), and "Macbiobride MG-20P" (manufactured by NOF Corporation; in formula (1), x=0, y=5, z=0).

[0021] The foamy cleanser composition of the present invention may contain one type of component (c) alone or two or more types in combination. The content of component (c) in the foam cleanser composition of the present invention is 0.1 to 5 mass%, preferably 0.5 to 4 mass%, more preferably 1 to 3 mass%. If the content of component (c) is too high, rinsing performance may be reduced, whereas if the content of component (c) is too low, foam retention, rinsing performance, and foam density may be reduced.

[0022] [(d) Propellant [(d) Component]] The propellant contained as component (d) in the foam cleanser composition of the present invention is not particularly limited as long as it is a propellant that can be used in cosmetic aerosols. Examples include hydrocarbons such as liquefied petroleum gas (LPG) containing propane, n-butane, i-butane, etc. as a main component; ethers such as dimethyl ether, methyl ethyl ether, diethyl ether, etc.; and compressed gases such as carbon dioxide, nitrogen gas, and oxygen gas. These propellants may be used alone or in combination of two or more. Among these, hydrocarbons such as liquefied petroleum gas (LPG) and compressed gases are preferred, and liquefied petroleum gas (LPG) is even more preferred. The content of component (d) is not particularly limited, but from the viewpoint of suppressing cell breakage, the content of component (d) is, for example, 15% by mass or less, preferably 10% by mass or less, and more preferably 8% by mass or less. Furthermore, from the viewpoint of improving foam quality and foam retention, the content of component (d) is, for example, 3% by mass or more, preferably 4% by mass or more, and more preferably 5% by mass or more.

[0023] [Other ingredients] The foam cleanser composition of the present invention may contain, in addition to the above-mentioned components, additives used in cosmetics, quasi-drugs, pharmaceuticals, etc., as needed, within the range that does not impair the effects of the present invention. For example, natural fragrances and synthetic fragrances can be added to enhance palatability. Natural fragrances are essential oils obtained by steam distillation or other methods from the flowers, stems, leaves, fruits, peels, and roots of plants, and the separated water can also be used as aromatic perfumes. Synthetic fragrances include esters, ethers, aldehydes, ketones, aromatic alcohols, hydrocarbons, and other substances. Examples of additives include lower alcohols such as ethanol and isopropanol; sugars such as lactose and sucrose; anionic surfactants such as alkyl ether sulfates and amide ether sulfates; water-soluble polymers such as carboxyvinyl polymers, carboxymethylcellulose, hydroxyethylcellulose, and hydroxypropylmethylcellulose; cationic polymers such as ceramides, cholesterol, and cationized cellulose; thickening polysaccharides such as xanthan gum; acids and alkalis as pH adjusters; parabens; preservatives; extracts derived from plants and animals; vitamins; amino acids; coloring agents; and pigments.

[0024] [water] In the foamy cleanser composition of the present invention, the remainder other than the above-mentioned components (a) to (d) and other components blended as necessary is preferably water. The content of water in the foamy cleanser composition is not particularly limited, but is, for example, 10 to 90 mass%, preferably 15 to 70 mass%, and more preferably 25 to 50 mass%. As the water, for example, purified water, distilled water, ion-exchanged water, etc. can be used.

[0025] [Aerosol container] The foam cleanser composition of the present invention is enclosed in an aerosol container and sprayed from the aerosol container to form a foam. The aerosol container is a pressure-resistant container that includes at least an aerosol valve and a nozzle.

[0026] The pressure-resistant container may be made of, for example, a metal such as aluminum or tinplate, a synthetic resin such as polyethylene terephthalate, or glass, and may be shaped like a cylinder with a bottom and an opening at the top.

[0027] The aerosol valve can be an aerosol valve commonly used for aerosol containers, such as one comprising a valve mechanism, a housing that accommodates the valve mechanism, and a mounting member that holds the housing in a predetermined position in the pressure-resistant container and secures it to the opening of the pressure-resistant container. The valve mechanism, for example, comprises a stem, a stem gasket that closes the stem hole, and a spring that urges the stem upward. When the stem moves downward against the spring, the stem hole opens, thereby connecting the inside and outside of the pressure-resistant container. The housing has a housing hole for taking in the foamy detergent composition from the pressure-resistant container, and a dip tube that extends to the bottom of the pressure-resistant container is connected to the housing hole. This allows the foamy detergent composition from the pressure-resistant container to pass through the dip tube and be supplied to the gap between the housing and the stem.

[0028] The nozzle is a component attached to the pressure-resistant container via the aerosol valve, and is formed with a passage through which the foamy detergent composition taken in from the pressure-resistant container via the stem hole of the aerosol valve passes, and a spray nozzle through which the foamy detergent composition is sprayed to the outside. When a user presses the nozzle downward against the spring, the stem also moves downward, opening the stem hole and connecting the inside of the pressure container to the outside. This opening causes the foam detergent composition to pass through the dip tube, housing hole, and stem hole due to the pressure of the gaseous propellant inside the pressure container and be sprayed out through the nozzle outlet. The foam detergent composition sprayed out forms a foam due to the rapid expansion of the propellant caused by the reduced pressure.

[0029] The foam detergent composition of the present invention can be produced by a conventional method. For example, the ingredients other than component (d) are appropriately heated, stirred, mixed, cooled to room temperature, and then filled into a pressure-resistant container. After further filling the pressure-resistant container with component (d), a mounting member for an aerosol valve is fixed to the opening of the pressure-resistant container, thereby producing a foam detergent composition sealed in an aerosol container. [Example]

[0030] The following examples and comparative examples will be used to explain the embodiments of the present invention in more detail, but the present invention is not limited to these examples.

[0031] The components used in each of the examples and comparative examples are as follows. (a-1) Sodium N-coconut oil fatty acid acylmethyl taurate (a-2) Sodium lauroyl-N-methylalanine (a'-3) Sodium Laureth Sulfate

[0032] (b) Polyoxyethylene sorbitan monolaurate Average number of moles of ethylene oxide added: 80 moles

[0033] (c-1) Polyoxypropylene methyl glucoside In equation (1), x=0, y=2.5, z=0 (c-2) Polyoxyethylene methyl glucoside In equation (1), x=2.5, y=0, z=0

[0034] (d) Liquefied petroleum gas

[0035] [Examples 1 to 9, Comparative Examples 1 to 4] Foamy cleanser compositions were prepared by the following method using the blending ratios shown in Tables 1 and 2. The common components in Tables 1 and 2 are the three components shown in Table 3. Specifically, purified water, component (a), component (b), and three of the common components were mixed, heated to 75-80°C, cooled, and then component (c) was added. A pressure-resistant aerosol test bottle (Tokyo Polymer Co., Ltd., 100 ml capacity) was filled with the components except for the propellant of component (d), and the test bottle was sealed with an aerosol valve. A specified amount of propellant was added via the aerosol valve, and a nozzle was attached to prepare a foam detergent composition sealed in an aerosol container. The resulting foamy detergent compositions were evaluated for four items according to the following evaluation criteria. The evaluation results are shown in Tables 1 and 2. The numerical values ​​for each component in Tables 1 and 2 indicate the content (% by mass) of each component in the foamy detergent composition.

[0036] (1) Rinseability Fifteen women (aged 21 to 59) were used as panelists, and the foam cleanser compositions were discharged from a container, spread onto the skin, and evaluated for ease of rinsing (rinsability) when washed off as follows. 3 points: Sufficient rinsability. 2 points: Slightly rinsable. 1 point: Not very rinsable.

[0037] (2) Moisturizing feeling after rinsing Fifteen female panelists (aged 21 to 59) were asked to dispense the foam cleanser composition from a container, spread it on the skin, and then rinse it off, after which the moist feeling of the skin was judged as follows. 3 points: Sufficiently moist. 2 points: Slightly moist. 1 point: Slightly refreshing.

[0038] <Three-level evaluation based on the sum of the scores in (1) and (2)> ◎: Total score is 35 or more ○: Total score is between 25 and 35 △: Total score is between 15 and 25

[0039] (3) Foam retention The foam detergent composition was discharged from the container, and the amount of foam immediately after discharge and the time during which the foam surface remained smooth were measured and evaluated according to the following evaluation criteria. The foam quality and foam volume immediately after discharge were used as the criteria and the evaluation was carried out as follows. ◎: The amount of foam immediately after ejection and the fineness of the foam surface are maintained for 300 seconds or more. Good: The amount of foam immediately after ejection and the fineness of the foam surface persist for 180 seconds or more but less than 300 seconds. △: The amount of foam immediately after ejection and the fineness of the foam surface persist for 60 seconds or more but less than 180 seconds.

[0040] (4) Foam density The foam detergent composition thus obtained was filled into a semi-spherical glass cup having a volume of approximately 100 mL at room temperature with the discharged product (foam-like discharged product), and the weight was measured to calculate the foam specific gravity (g / mL).The foam specific gravity thus obtained was then evaluated according to the following evaluation criteria.The foam specific gravity measured in this foam specific gravity measurement test is one index that indicates the density of the foam. ◎: When the foam specific gravity of the discharged material is 0.04 g / mL or more and 0.08 g / mL or less ○: When the foam specific gravity of the discharged material is 0.02 g / mL or more but less than 0.04 g / mL △: When the foam specific gravity value of the discharged material is 0.01 g / mL or more but less than 0.02 g / mL

[0041] [Table 1]

[0042] [Table 2]

[0043] [Table 3]

[0044] As shown in Table 1, the foam cleanser compositions of the examples containing components (a) to (d) and satisfying the requirements of the present invention were found to be able to form dense foam with excellent rinsing properties, moisturizing feeling after rinsing, and excellent foam retention. In contrast, the foamy cleanser compositions of the comparative examples, which did not contain any of the components (a) to (c) specified in the present invention, showed evaluation results inferior to those of the examples.

Claims

1. A foamy detergent composition enclosed in a pressure-resistant container equipped with an aerosol valve and a nozzle, the foamy detergent composition containing the following component (a) in an amount of 4 to 15 mass %, component (b) in an amount of 5 to 10 mass %, component (c) in an amount of 0.1 to 3 mass %, and component (d): (a) Acylamino acid salt type anionic surfactant (b) Polyoxyethylene sorbitan mono-fatty acid ester having an average added mole number of ethylene oxide of 60 to 100 moles (c) Alkylene oxide adduct derivative represented by formula (1) MG-[O(EO)x(PO)y(BO)zH] ４ ... Formula (1) (MG is a residue obtained by removing a hydroxyl group from methyl glucoside, EO is an oxyethylene group, PO is an oxypropylene group, x and y are the average number of moles of EO and PO added, respectively, and 0≦x≦5, 0≦y≦2.5, and 1≦x+y≦7.

5. BO is an oxybutylene group, and z is the average number of moles of BO added, and 0≦z≦1.) (d) propellant

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