JP2013112663A - Gel-like skin detergent composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an easily applicable gel-like skin detergent without dripping the detergent, showing excellent foaming even in a reduced amount of the surfactant in the whole, and further highly safe to skin.SOLUTION: The gel-like skin detergent is characterized by including 0.1-40 mass% of an anionic surfactant having a carboxyl group and/or sulfone group, and 0.1-10 mass% of an alkyl acrylate/alkyl methacrylate/polyoxy ethylene copolymer and/or a cellulosic thickening agent, and showing 5,000-100,000 mPa s viscosity at 25°C.

Description

The present invention relates to a gel-like skin cleanser composition having high safety and excellent foaming, foam quality, detergency and usability.

Skin cleansing compositions such as facial cleansers or cleansing agents are usually gel-like agents because of their beauty in terms of usability, such as sagging between fingers during foaming, sagging during massage, and glossy appearance. Type is preferred. In order to make the surfactant composition into a gel, a gelling agent and a thickening agent are used.

Most commonly used gelling agents are carboxyvinyl polymers that are neutralized with a base (sodium hydroxide or triethanolamine). However, since inorganic salts and organic salts may disintegrate the gel, depending on the type of surfactant used, the viscosity may be lowered or liquefied.

On the other hand, when the amount of the surfactant is limited, foaming and foam quality may be insufficient. In addition, when these thickeners are added, the thickener will precipitate due to the type and concentration of surfactants and other additives, storage conditions, temperature during use, etc. There are problems such as the occurrence of turbidity, changes in the foam quality of the surfactant itself, and a marked deterioration in the feeling of use.

In order to solve such a problem, studies have been made on a gel-like skin cleanser composition excellent in usability and foaming power (see, for example, Patent Document 1).

Japanese Patent No. 4118482

However, the fact that the alkyl acrylate / alkyl methacrylate / polyoxyethylene copolymer is not neutralized or only the anionic surfactant described is still insufficient in terms of usability, foaming and foam quality.

Accordingly, an object of the present invention is to provide a gel-like skin cleansing agent that is easy to use without dripping down, is foamy even when the total amount of the surfactant is reduced, is excellent in foam quality, and has high safety to the skin. It is in.

As a result of intensive studies to achieve the above object, the present inventors have excellent touch and usability by using a specific anionic surfactant in combination with a specific copolymer and / or thickener. In addition, the present inventors have found that a gel-like skin cleanser having excellent foaming and foam quality and high safety against the skin can be obtained even when the total amount of the surfactant is reduced.

That is, the gel-like skin cleansing composition of the present invention comprises (A) 0.1 to 40% by mass of an anionic surfactant containing a carboxyl group and / or a sulfonic acid group, and (B) an alkyl acrylate / alkyl methacrylate.・ Contains 0.1 to 10% by mass of polyoxyethylene copolymer and / or cellulose thickener, and has a viscosity at 25 ° C. of 5,000 to 100,000 mPa ·
s. Furthermore, the component (A) is preferably at least one selected from fatty acid salts and N-acylamino acid surfactants.

According to the present invention, it is possible to provide a gel-like skin cleansing agent that is easy to use without dripping down, is excellent in foaming and foam quality even when the total amount of surfactant is reduced, and has high safety to the skin.

The anionic surfactant of the component (A) used in the present invention is an anionic surfactant containing at least one of a carboxyl group and a sulfonic acid group, and as such, preferably a fatty acid salt, an N-acylamino acid And surface active agents.

More specifically, the fatty acid salts include caprylic acid, capric acid, lauric acid, myristic acid, palmitic acid, stearic acid, arachidic acid, and behenine, whether saturated fatty acid, unsaturated fatty acid, linear fatty acid, or branched fatty acid. One or more selected from acids, oleic acid, linoleic acid, isostearic acid and the like, and lauric acid, myristic acid, palmitic acid, and stearic acid are particularly preferable in terms of achieving good foaming, foam quality, and stability. It is.

Examples of the N-acylamino acid surfactant include N-cocoyl glycine salt, N-lauroyl glutamate, N-myristoyl glutamate, N-lauroyl-N-methylglycine salt, N-lauroyl-β-alanine salt, N- One or more selected from myristoyl-β-alanine salt, N-lauroyl aspartate, N-lauroyl serine salt, and N-acylmethyl taurate salt are preferable.

The salt portion of the N-acylamino acid surfactant is preferably one or more selected from alkali metal salts, alkanolamines and basic amino acid salts.

In the gel-like skin cleansing composition of the present invention, the amount of the anionic surfactant containing the carboxyl group and / or sulfonic acid group is 0.1 to 40% by mass with respect to the total amount of the composition, preferably 5 to 30% by mass, more preferably 15 to 30% by mass. When the blending amount is less than 0.1% by mass, foaming, foam quality, detergency and usability are deteriorated. On the other hand, when it exceeds 40% by mass, the feeling of use becomes worse, such as dripping from the skin.

Moreover, in order to improve low-temperature stability, it is preferable to further contain an amphoteric surfactant. The amphoteric surfactant is not limited as long as it is generally used in a skin cleanser composition. For example, lauric acid amidopropyl betaine, coconut oil fatty acid amidopropyl betaine, lauryldimethylaminoacetic acid betaine, 2-alkyl-N -Carboxymethyl-N-hydroxyethylimidazolinium betaine, sodium laurylaminodiacetate, sodium β-aminopropionate, N-lauroyl-N′-carboxymethyl-N′-hydroxyethylethylenediamine sodium and the like.

The component (B) used in the present invention is at least one of an alkyl acrylate / alkyl methacrylate / polyoxyethylene copolymer and a cellulose-based thickener. As the alkyl acrylate / alkyl methacrylate / polyoxyethylene copolymer, at least one of acrylic acid and / or methacrylic acid monomer and alkyl acrylate (C1 to C4) or alkyl methacrylate (C1 to C4) is used. Examples thereof include a copolymer of the above monomer and one or more monomers which are esterified products of polyoxyethylene (addition number 2 to 70) alkyl (C8 to C30) ether and acrylic acid or methacrylic acid. Examples of the monomer of polyoxyethylene alkyl ether and acrylic acid or methacrylic acid include polyoxyethylene (20) stearyl ether and methacrylic acid ester. This copolymer is usually in an emulsion state, and the thickener disclosed in JP-A-11-549 corresponds to this. Examples of commercially available products include Aculin 22 (Rohm and Haas Japan).

Examples of the cellulose thickener include carboxymethylcellulose, hydroxypropylmethylcellulose, hydroxyethylcellulose and the like.

In the gel-like skin cleansing composition of the present invention, the blending amount of the alkyl acrylate / alkyl methacrylate / polyoxyethylene copolymer and / or the cellulose-based thickener is 0.1 to 10 with respect to the total amount of the composition. It is mass%, Preferably it is 1-8 mass%, More preferably, it is 1-5 mass%. When the blending amount is less than 0.1% by mass, the feeling of use is deteriorated such as dripping from the skin. On the other hand, if it exceeds 10% by mass, it will not be in the form of a gel, so the compatibility with water will worsen, and excellent foaming, foam quality and feeling will not be obtained.

The gel-like skin cleansing composition of the present invention has a viscosity at 25 ° C. of 5,000 to 100,000 mPa · s. When the viscosity is less than 5,000 mPa · s, the feeling of use is deteriorated such as dripping from the skin. On the other hand, if it exceeds 100,000 mPa · s, it will not be in a gel form, so it will not fit well with water, and excellent foaming, foam quality and feeling will not be obtained.

Moreover, the gel-like skin cleansing composition of the present invention does not substantially contain ethanol and parabens such as paraoxybenzoic acid, methyl paraoxybenzoate, and ethyl paraoxybenzoate. Thereby, it becomes possible to reduce irritation | stimulation to skin. Note that “substantially” means that it is not contained at all or contained in a raw material such as a plant extract.

In addition to the components described above, the gel-like skin cleanser composition of the present invention includes other components, such as a cationic surfactant, a nonionic surfactant, a polymer, and a powder, as long as the object of the present invention is not impaired. Components such as body (pigments, dyes, resins, etc.), fragrances, moisturizers, physiologically active ingredients, salts, solvents, pearling agents, neutralizing agents, pH adjusters, insect repellents, enzymes, etc. can be appropriately blended. .

Examples of the powder include pigments such as red No. 201, yellow No. 4, blue No. 1, black No. 401, lake pigments such as yellow No. 4 Al lake, yellow No. 203 Ba lake, nylon powder, silk powder, Silicone powder, cellulose powder, silicone elastomer spherical powder, polymers such as polyethylene powder, yellow iron oxide, red iron oxide, chromium oxide, carbon black, colored pigments such as ultramarine and bitumen, white pigments such as zinc oxide and titanium oxide , Body pigments such as talc, mica, sericite, kaolin, pearl pigments such as titanium mica, metal salts such as barium sulfate, calcium carbonate, magnesium carbonate, magnesium silicate, inorganic powders such as silica and alumina, bentonite, smectite, Examples thereof include boron nitride. There are no particular restrictions on the shape of these powders (spherical, rod-like, needle-like, plate-like, indeterminate, flake-like, spindle-like, etc.).

The above powder is conventionally known surface treatment such as fluorine compound treatment, silicone treatment, silicone resin treatment, pendant treatment, silane coupling agent treatment, titanium coupling agent treatment, oil agent treatment, N-acylated lysine treatment, polyacrylic. The surface treatment may or may not be performed in advance by acid treatment, metal soap treatment, amino acid treatment, inorganic compound treatment, plasma treatment, mechanochemical treatment, or the like.

Examples of the solvent include purified water, ethanol, light liquid isoparaffin, lower alcohol, ethers, LPG, fluorocarbon, N-methylpyrrolidone, fluoroalcohol, volatile linear silicone, and next-generation chlorofluorocarbon.

Examples of the physiologically active ingredient include substances that impart some physiological activity to the skin when applied to the skin. For example, anti-inflammatory agents, anti-aging agents, UV protection agents, tanning agents, antioxidants, moisturizers, blood circulation promoters, antibacterial agents, bactericides, desiccants, cooling agents, warming agents, vitamins, amino acids, Examples include wound healing promoters, stimulus-relieving agents, analgesics, cell activators, enzyme components, and the like. Examples of the physiologically active component include natural plant extract components, seaweed extract components, herbal medicine components, and compounds. Among these, natural plant extract components, seaweed extract components, herbal medicine components are particularly safe. This is preferable.

Examples of the above-mentioned natural plant extract components, seaweed extract components, herbal medicine components include, for example, Ashitaba extract, Achacha extract, Altea extract, Aloe extract, Apricot extract, Ginkgo biloba extract, Fennel extract, Oolong tea extract, Ages extract, Ogon extract, Oat extract, Hypericum extract, Dutch mustard extract, Orange extract, Seawater dried product, Seaweed extract, Hydrolyzed wheat powder, Hydrolyzed silk, Chamomile extract, Carrot extract, Kawara mugwort extract, Licorice extract, Kiwi extract, Cucumber extract, Gardenia extract, Kumazasa extract, Clara extract, Walnut extract, Grapefruit extract, Chlorella extract, Mulberry extract, Black tea extract, Yeast extract, Collagen, Pomegranate extract, Soap extract, Salviae , Hawthorn extract, shiikuwasha peel extract, sage extract, lion extract, perilla extract, linden extract, peony extract, birch extract, horsetail extract, horseshoe extract, hawthorn extract, horseshoe extract, mint extract, sage extract, Senkyu extract, assembly extract, thyme extract, thyme extract, tea extract, clove extract, chimpi extract, touki extract, tonin extract, dokudami extract, tomato extract, natto extract, carrot extract, garlic extract, wild rose extract, honey, hamamelis extract, toad chick extract, Bisabolol, loquat extract, buccal extract, propolis, loofah extract, peppermint extract, bodaige extract, hope Vinegar, jojoba leaf extract, horse chestnut extract, can be mentioned soapberry extract, Melissa extract, peach, strawberry geranium extract, Yuzuekisu, mugwort extract, lavender extract, lemon extract, Astragalus Saw extract, rosemary extract, royal jelly extract, and the like.

Examples of components other than the above-mentioned natural plant extract components, seaweed extract components, and herbal medicine components include deoxyribonucleic acid, mucopolysaccharide, sodium hyaluronate, sodium chondroitin sulfate, collagen, elastin, chitin, chitosan, hydrolyzed eggshell membrane Moisturizing ingredients such as biopolymers such as amino acids, sodium lactate, urea, sodium pyrrolidone carboxylate, betaine, whey, oily ingredients such as sphingolipids, ceramides, cholesterol, cholesterol derivatives, phospholipids, ε-aminocaproic acid, glycyrrhizic acid , Β-glycyrrhetinic acid, lysozyme chloride, guaiazulene, hydrocortisone and other anti-inflammatory agents, vitamins (A, B2, B6, C, D, E), calcium pantothenate, biotin, nicotinamide, vitamin C esters, etc. Active ingredients such as amines, allantoin, diisopropylamine dichloroacetate, 4-aminomethylcyclohexanecarboxylic acid, antioxidants such as tocopherol, carotenoid, flavonoid, tannin, lignan, saponin, α-hydroxy acid, β-hydroxy acid, etc. Cell activators, blood circulation promoters such as γ-oryzanol, vitamin E derivatives, bactericides such as isopropylmethylphenol, triclosan, hinokitiol, benzalkonium chloride, cooling agents such as l-menthol and mint oil, retinol, retinol derivatives And wound healing agents.

EXAMPLES Hereinafter, although an Example demonstrates this invention, this invention is not limited at all by these Examples. The sensory property test described in the examples was carried out by the following method.

<Sensory characteristics test>
Twenty female panelists use gel-like skin cleanser composition, and each item of dripping, foaming, foam quality, and safety (no skin irritation) is evaluated in five levels by sensory test. Judged by.
5-point rating 5 points: very good 4 points: good 3 points: normal 2 points: somewhat bad 1 point: bad
Judgment ◎: Average score is 4.5 points or more ○: 3.5 or more, less than 4.5 points △: 2.5 or more, less than 3.5 points ×: Average score is less than 2.5 points

Examples 1-8, Comparative Examples 1-5 (gel skin cleanser composition).
A gel-like skin cleansing composition was prepared with the composition shown in Table 1, and the sensory characteristics test was conducted. The results are also shown in Table 1.

From the results of Table 1, the gel-like skin cleanser compositions of each example are easy to use without dripping down the agent, as compared with those of each comparative example, and even if the total amount of surfactant is reduced, It turns out that it is excellent in foam quality and is also excellent in safety to the skin.

Hereinafter, other examples of the gel-like skin cleansing composition according to the present invention will be shown. All of them satisfied viscosity, dripping, foaming, foam quality and safety.

Example 9
(Ingredient name) (mass%)
1. N-cocoylglycine potassium 15.0
2. (Acrylates / Stearless Methacrylate-20) Copolymer 5.0
3. Lauryl hydroxysultain 2.0
4). Potassium hydroxide 0.7
5. Phenoxyethanol appropriate amount 6. Edetate tetrasodium Grapefruit extract 0.5
8). Grape extract 0.5
9. Orange extract 0.5
10. Perfume proper amount11. Purified water residue

Example 10
(Ingredient name) (mass%)
1. N-lauroyl sarcosine sodium 10.0
2. N-cocoyl methyl taurine sodium 3.0
3. Lauric acid 3.0
4). Myristic acid 1.5
5. (Acrylates / Stearless Methacrylate-20) Copolymer 5.0
6). Potassium hydroxide 1.8
7). 7. Phenoxyethanol appropriate amount Edetoic acid tetrasodium Peach leaf extract 0.5
10. Aloe extract 0.5
11. Cha extract 0.5
12 Perfume proper amount13. Purified water residue

Example 11
(Ingredient name) (mass%)
1. N-cocoylglycine potassium 15.0
2. Lauryl hydroxysultain 2.0
3. Hydroxypropyl methylcellulose 3.0
4). 4. Phenoxyethanol appropriate amount Edetate tetrasodium appropriate amount 6. Jojoba leaf extract 0.5
7). Tochaka extract 0.5
8). Pomegranate peel extract 0.5
9. Purified water residue

Claims (2)

(A) 0.1-40% by mass of an anionic surfactant containing a carboxyl group and / or a sulfonic acid group, and (B) an alkyl acrylate / alkyl methacrylate / polyoxyethylene copolymer and / or a cellulose-based increase. A gel-like skin cleansing composition comprising 0.1 to 10% by mass of a viscous agent and having a viscosity at 25 ° C. of 5,000 to 100,000 mPa · s. The gel-like skin cleansing composition according to claim 1, wherein the component (A) is at least one selected from fatty acid salts and N-acylamino acid surfactants.