Cleaning composition

Abstract

To provide a detergent composition that is a detergent including a C14-18 higher fatty acid salt, and has storage stability at low temperatures.SOLUTION: A detergent composition has a C14-18 higher fatty acid salt, the detergent composition containing the following component (A) and component (B): (A) chelator and (B) phosphate.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to a detergent composition that has good storage stability at low temperatures, is mild to the skin, and has excellent detergency properties with sufficient foaming and foam volume. [Background technology]

[0002] Conventionally, skin cleanser compositions have mainly used fatty acid alkali metal salts (fatty acid soaps) as a cleansing base, and have been highly rated by users for their refreshing feel after washing. In addition, those formulated in a paste form for ease of use have been well-received on the market.

[0003] Among the fatty acids commonly used in skin cleansers based on fatty acid salts, the relatively short-chain lauric acid (12 carbon atoms) has excellent storage stability at low temperatures, good solubility in water, and high foaming power. However, it has drawbacks such as skin irritation and a feeling of tightness after cleansing. On the other hand, the longer-chain myristic acid (14 carbon atoms), palmitic acid (16 carbon atoms), and stearic acid (18 carbon atoms) are less irritating to the skin, but have drawbacks such as poor storage stability at low temperatures, low solubility in water, and poor foaming power.

[0004] On the other hand, as methods for improving storage stability at low temperatures, a composition in which a fatty acid salt and sophorose lipid are adjusted at a specific blend ratio (Patent Document 1) and a composition containing a fatty acid salt, a cationic polymer, an acylalkanolamide, and a specific polyoxyethylene sorbitol oleate ester (Patent Document 2) have been disclosed, but these have not yet been sufficient in reducing skin irritation. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Patent No. 6522867 [Patent Document 2] Japanese Patent Application Laid-Open No. 2014-205622 Summary of the Invention [Problem to be solved by the invention]

[0006] The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a detergent that uses a salt of a higher fatty acid having 14 to 18 carbon atoms and has storage stability at low temperatures. [Means for solving the problem]

[0007] As a result of intensive research conducted to achieve the above object, it was discovered that the above problem could be solved by blending a chelating agent and a phosphate salt with a cleanser using a salt of a higher fatty acid having 14 to 18 carbon atoms, and this led to the completion of the present invention.

[0008] The first invention of the present application is a detergent composition containing a salt of a higher fatty acid having 14 to 18 carbon atoms, characterized in that the detergent composition contains the following component (A) and component (B): (A) Chelating agent (B) Phosphate

[0009] A second invention of the present application is the cleaning composition according to the first invention of the present application, wherein the (A) is 0.01 mass % or more and the (B) is 0.01 mass % or more, based on the total mass of the cleaning composition.

[0010] A third invention of the present application is a cleaning composition according to the first or second invention of the present application, which is substantially free of sodium chloride.

[0011] The fourth invention of the present application is a method for stabilizing the storage of a detergent composition at low temperatures, which comprises blending the following (A) and (B) into a detergent composition containing a salt of a higher fatty acid having 14 to 18 carbon atoms: (A) Chelating agent (B) Phosphate [Effects of the Invention]

[0012] The detergent composition of the present invention has good storage stability at low temperatures, is mild to the skin, and has excellent cleansing properties with sufficient foaming and foam volume.

[0013] In the present invention, "storage stability at low temperatures" means that the detergent composition does not undergo separation, syneresis, solidification, or formation of particles or lumps even when stored at a low temperature of 0°C for 3 months. DETAILED DESCRIPTION OF THE INVENTION

[0014] The configuration of the present invention will be described in detail below.

[0015] <Fatty acid salts> The fatty acid salt used in the present invention is a potassium or sodium salt of a linear or branched fatty acid having 14 to 18 carbon atoms. The higher fatty acid salt used in the present invention may be either saturated or unsaturated. Specific examples include myristic acid, palmitic acid, palmitoleic acid, stearic acid, isostearic acid, oleic acid, coconut oil fatty acid, and palm kernel fatty acid.

[0016] The higher fatty acid salt does not necessarily have to be blended as a fatty acid salt, and may contain free higher fatty acid. It may be previously converted into a fatty acid salt, or may be a fatty acid obtained by neutralizing a linear or branched fatty acid having 14 to 18 carbon atoms with an alkaline agent such as sodium hydroxide or potassium hydroxide in an amount equivalent to that of the fatty acid salt during the production process.

[0017] The neutralization rate may be 100%, or may be less than 100%, leaving free fatty acids. In the present invention, the fatty acid may be added after preparing the fatty acid salt, or the amount of alkaline agent added may be reduced when reacting the fatty acid with the alkaline agent, leaving unreacted free fatty acids. In this case, the content of the alkaline agent, sodium hydroxide or potassium hydroxide, is preferably 70% to 100% neutralization rate relative to the fatty acid, more preferably 90% or more. If it is 70% or more, good foaming properties are achieved, and if it is 100% or less, irritation to the skin caused by excessive alkaline agent can be suppressed.

[0018] These higher fatty acid salts can be used alone or in combination of two or more, and are most preferably used in an amount of 5 to 40% by mass, where the total mass of the composition is 100% by mass. A content of 5% by mass or more provides good foaming, foam volume, and cleaning performance, while a content of 40% by mass or less provides good intermediate bulk stability. Here, "intermediate bulk stability" means that the detergent composition does not separate, synerase, solidify, or form particles or lumps even when stored at room temperature for 6 months.

[0019] <(A) Chelating agent> The chelating agent (hereinafter referred to as "(A)") used in the present invention is blended for the purpose of sequestering metal ions and improving foaming and cleaning power. Examples of component (A) include ethylenediaminetetraacetic acid (EDTA), ethylenediaminehydroxyethyltriacetic acid (HEDTA), and salts thereof.

[0020] The salt of EDTA is not particularly limited as long as it is pharmacologically acceptable, and examples thereof include alkali metal salts such as sodium EDTA, disodium EDTA, and tetrasodium EDTA. EDTA or a salt thereof can also be used in the form of a hydrate. A specific example of a hydrate is disodium EDTA dihydrate. The salt of HEDTA is not particularly limited as long as it is pharmacologically acceptable, and examples thereof include trisodium HEDTA. These chelating agents may be used alone or in combination of two or more.

[0021] From the above viewpoints, the content of component (A) in the cleanser composition is 0.01 to 1.0% by mass. If it is 0.01% by mass or more, a sufficient effect of improving storage stability at low temperatures can be obtained, and if it is 1.0% by mass or less, irritation to the skin can be suppressed.

[0022] <(B) Phosphate> The phosphate salt (hereinafter referred to as "(B)") used in the present invention is blended for the purpose of improving storage stability at low temperatures. Examples of component (B) include monosodium dihydrogen phosphate, disodium monohydrogen phosphate, and trisodium phosphate, but it is preferable to blend monosodium dihydrogen phosphate.

[0023] From the above viewpoints, the content of component (B) in the cleanser composition is 0.01 to 3.0% by mass. If it is 0.01% by mass or more, a sufficient improvement effect on low-temperature storage stability can be obtained, and if it is 3.0% by mass or less, good foaming and a sufficient amount of foam can be obtained.

[0024] In the present invention, it is necessary to blend (A) and (B) into a cleanser using a higher fatty acid salt having 14 to 18 carbon atoms. By blending (A) and (B) in combination, the crystal precipitation temperature at low temperatures is lowered, the generation of particles and lumps is suppressed, and storage stability is improved.

[0025] Although the cleaning composition of the present invention is not particularly limited, it is preferable that the cleaning composition is substantially free of sodium chloride. In the present invention, "substantially free of sodium chloride" means that sodium chloride is not intentionally blended, and even if sodium chloride is accidentally incorporated as a trace component, the amount is 0.2 mass % or less of the total mass.

[0026] By being substantially free of sodium chloride, the crystal precipitation temperature at low temperatures is lowered, and further the generation of grains and lumps at low temperatures is suppressed, improving storage stability.

[0027] In addition to the above-mentioned components, the detergent composition of the present invention may contain other components, such as amphoteric surfactants, nonionic surfactants, cationic surfactants, anionic surfactants, powders (pigments, colorants, resins, etc.), physiologically active ingredients, antioxidants, sequestering agents, preservatives, ultraviolet absorbers, fragrances, moisturizers, salts, solvents, pearlizing agents, neutralizing agents, insect repellents, enzymes, and the like, as appropriate, provided that the purpose of the present invention is not impaired.

[0028] The amphoteric surfactant that can be incorporated within a range that does not impair the object of the present invention is not particularly limited, and examples thereof include lauric acid amidopropyl betaine, coconut oil fatty acid amidopropyl betaine, lauryl dimethyl aminoacetic acid betaine, 2-alkyl-N-carboxymethyl-N-hydroxyethyl imidazolinium betaine, sodium lauryl aminodiacetate, sodium β-aminopropionate, and N-lauroyl-N'-carboxymethyl-N'-hydroxyethyl ethylenediamine sodium.

[0029] Nonionic surfactants that can be added within the scope of the present invention are not particularly limited, and examples thereof include polyoxyethylene cetyl ether, monostearate monoester, Examples of suitable oils include sorbitan, polyoxyethylene sorbitan triisostearate, decyl glucoside, lauryl glucoside, polyoxyethylene hydrogenated castor oil, polyoxyethylene monoisostearate, polyoxyethylene glyceryl dioleate, coconut oil fatty acid diethanolamide, coconut oil fatty acid monoethanolamide, coconut oil fatty acid N-methylethanolamide, polyoxyethylene polyoxypropylene glycol, and polyethylene glycol monolaurate.

[0030] Examples of the powder include pigments such as Red No. 201, Yellow No. 4, Blue No. 1, and Black No. 401, lake pigments such as Yellow No. 4 Al Lake and Yellow No. 203 Ba Lake, nylon powder, silk powder, silicone powder, cellulose powder, spherical silicone elastomer powder, polymers such as polyethylene powder, colored pigments such as yellow iron oxide, red iron oxide, chromium oxide, carbon black, ultramarine, and Prussian blue, white pigments such as zinc oxide and titanium oxide, extender pigments such as talc, mica, sericite, and kaolin, pearl pigments such as titanium mica, metal salts such as barium sulfate, calcium carbonate, magnesium carbonate, and magnesium silicate, inorganic powders such as silica and alumina, bentonite, smectite, and boron nitride. There are no particular limitations on the shape of these powders (spherical, rod-like, needle-like, plate-like, irregular, flaky, spindle-like, etc.).

[0031] Examples of the physiologically active ingredient include substances that impart some kind of physiological activity to the skin when applied to the skin. Examples include anti-inflammatory agents, anti-aging agents, UV protection agents, tightening agents, antioxidants, moisturizing agents, blood circulation promoters, antibacterial agents, disinfectants, drying agents, cooling agents, warming agents, vitamins, amino acids, wound healing promoters, irritation alleviators, analgesics, cell activators, enzyme components, etc. Examples of the physiologically active ingredient include natural plant extracts, seaweed extracts, herbal ingredients, and compounds, and among these, natural plant extracts, seaweed extracts, and herbal ingredients are particularly preferred in terms of safety.

[0032] Examples of the natural plant extracts, seaweed extracts, and herbal ingredients include angelica tree extract, hydrangea extract, althaea extract, aloe extract, apricot extract, ginkgo extract, fennel extract, oolong tea extract, angelica tree extract, scutellaria root extract, Phellodendron bark extract, St. John's wort extract, watercress extract, orange extract, dried seawater, seaweed extract, hydrolyzed wheat powder, hydrolyzed silk, chamomile extract, carrot extract, artemisia capillaris extract, licorice extract, kakyō extract, kiwi extract, cucumber extract, gardenia extract, kumazasa extract, sophora flavescens extract, walnut extract, grapefruit extract, chlorella extract, mulberry extract, black tea extract, yeast extract, collagen, salvia extract, soapwort extract, hawthorn extract, rehmannia root extract, lithospermum root extract, perilla extract, linden extract, peony extract, white birch extract, and horsetail extract. ivy extract, hawthorn extract, elderberry extract, yarrow extract, peppermint extract, sage extract, cnidium extract, Swertia japonica extract, soybean extract, Chinese laurel extract, thyme extract, tea extract, clove extract, tangerine peel extract, Angelica acutiloba extract, Peach kernel extract, Houttuynia cordata extract, tomato extract, natto extract, carrot extract, garlic extract, wild rose extract, honey, witch hazel extract, Japanese knotweed extract, bisabolol, loquat extract, Poria cocos extract, propolis, loofah extract, peppermint extract, linden extract, hop extract, Madonna lily flower extract, horse chestnut extract, soapberry extract, melissa extract, peach extract, saxifrage extract, yuzu extract, mugwort extract, lavender extract, lemon extract, astragalus extract, rosemary extract, and royal jelly extract.

[0033] In addition to the above-mentioned natural plant extracts, seaweed extracts, and herbal ingredients, other ingredients include biopolymers such as deoxyribonucleic acid, collagen, elastin, chitin, chitosan, and hydrolyzed eggshell membrane; moisturizing ingredients such as amino acids, sodium lactate, urea, sodium pyrrolidone carboxylate, betaine, and whey; sphingolipids, ceramides, cholesterol, and cholesterol. oily ingredients such as hydroxyl derivatives and phospholipids; anti-inflammatory agents such as ε-aminocaproic acid, glycyrrhizinic acid, β-glycyrrhetinic acid, lysozyme chloride, guaiazulene, and hydrocortisone; vitamins (A, B2, B6, C, D, and E), calcium pantothenate, biotin, nicotinamide, and vitamin C esters; active ingredients such as allantoin, diisopropylamine dichloroacetate, and 4-aminomethylcyclohexanecarboxylic acid; antioxidants such as tocopherol, carotenoids, flavonoids, tannins, lignans, and saponins; cell activators such as α-hydroxy acids and β-hydroxy acids; blood circulation promoters such as γ-oryzanol and vitamin E derivatives; bactericides such as isopropylmethylphenol, triclosan, hinokitiol, and benzalkonium chloride; cooling agents such as l-menthol and peppermint oil; and wound healing agents such as retinol and retinol derivatives.

[0034] The cleanser composition of the present invention can be suitably used as a hair or skin cleanser such as shampoo, shower gel, face wash, cleanser, body shampoo, hand soap, shaving agent, massage agent, etc. Each of these can be used in the form of a viscous liquid, cream, etc., and is particularly suitably used as a face wash foam or liquid body shampoo. [Example]

[0035] The present invention will now be described in detail with reference to examples, but is not limited thereto. Prior to the examples, the test and evaluation methods employed in each example will be described.

[0036] <Usage Feel Evaluation Test>

[0037] <Foaming> Ten panelists used the cleaning compositions of the Examples and Comparative Examples and performed a sensory evaluation on a 5-point scale from 1 to 5 for the quality of foaming. The average scores were calculated and the results were judged according to the following criteria (5-point scale evaluation). 5 points: Very good (I feel like the bubbles are increasing) 4 points: Good (I feel like the bubbles are increasing) 3 points: Normal (feels like the bubbles are increasing slightly) 2 points: Somewhat bad (feels like the foam isn't increasing) 1 point: Bad (feels like the bubbles aren't increasing)

[0038] (Evaluation criteria) ◎: Average score is 4.5 or higher ○: Average score is 3.5 or more and less than 4.5 △: Average score is 2.5 or more and less than 3.5 ×: Average score is 1.5 or more and less than 2.5 ××: Average score is less than 1.5

[0039] <Bubble amount> Ten panelists used the cleaning compositions of the Examples and Comparative Examples and performed a sensory evaluation on a 5-point scale from 1 to 5 for the amount of foam produced. The average score was calculated and judged according to the following criteria. (5-point scale) 5 points: Very much (covers both palms and spills over) 4 points: A lot of foam (enough to cover both palms) 3 points: Normal (the foam just covers both palms) 2 points: A little light (there is not enough foam to cover both palms, and when you spread the foam over the entire palm, you can see the skin) 1 point: Little (almost no foam)

[0040] (Evaluation criteria) ◎: Average score is 4.5 or higher ○: Average score is 3.5 or more and less than 4.5 △: Average score is 2.5 or more and less than 3.5 ×: Average score is 1.5 or more and less than 2.5 ××: Average score is less than 1.5

[0041] <Cleaning ability> Ten panelists used the cleaning compositions of the Examples and Comparative Examples and performed a sensory evaluation on a 5-point scale from 1 to 5 for the level of cleaning performance, calculated the average score, and evaluated the results according to the following criteria (5-point scale evaluation). 5 points: Very high (no stickiness at all, feels like all dirt has been removed) 4 points: High (no stickiness, feels like dirt has been removed) 3 points: Normal (slightly less sticky, feels like some dirt has been removed) 2 points: Slightly low (slightly sticky, feels like some dirt remains) 1 point: Low (slimy and feels like dirt remains)

[0042] (Evaluation criteria) ◎: Average score is 4.5 or higher ○: Average score is 3.5 or more and less than 4.5 △: Average score is 2.5 or more and less than 3.5 ×: Average score is 1.5 or more and less than 2.5 ××: Average score is less than 1.5

[0043] <Skin irritation> Ten panelists used the cleansing compositions of the Examples and Comparative Examples and performed a sensory evaluation of skin irritation on a 5-point scale from 1 to 5, calculated the average score, and evaluated the results according to the following criteria. (Evaluation criteria) ◎: Very good (less than 2 subjects answered that it was irritating) ○: Good (2 or more but less than 5 subjects answered that it was stimulating) △: Slightly bad (5 or more but less than 8 subjects answered that it was irritating) ×: Bad (8 or more subjects answered that it was irritating)

[0044] <Low temperature storage stability evaluation test> The sample was placed in a 50 mL transparent glass container, sealed, and stored in a thermostatic chamber at 0°C for 3 months, and then visually evaluated according to the following criteria.

[0045] (Evaluation criteria) ◎: Good condition (no obvious separation, syneresis, or solidification, no grains or lumps) ○: Good condition (no obvious separation, syneresis, or solidification, and almost no grains or lumps) △: Slightly poor condition (slight separation, water separation, solidification, grains and lumps) ×: Poor condition (separation, syneresis, solidification, significant grains and lumps, not suitable for use as a product)

[0046] Examples 1 to 15, Comparative Examples 1 to 3 The cleaning compositions having the formulations shown in Tables 1 and 2 were prepared in a conventional manner and the above tests were carried out. The results are also shown in Tables 1 and 2.

[0047] [Table 1]

[0048] [Table 2]

[0049] As is clear from Tables 1 and 2, all of the cleansing compositions of the Examples using the components of the present invention had excellent performance. On the other hand, the Comparative Examples were inferior in any of the following aspects: good foaming, large foam volume, cleansing performance, skin irritation, and low-temperature storage stability, and therefore failed to achieve the object of the present invention.

[0050] Prescription example 1: Body shampoo (1) Myristic acid 8.0 (2) Palmitic acid 3.0 (3) Stearic acid 0.5 (4) Potassium hydroxide 2.7 (5) Sorbitol 4.0 (6) DPG 4.0 (7) Sodium N-cocoyl-N-methyl taurate 1.5 (8) Sodium lauroyl aspartate 1.0 (9) Coconut oil fatty acid monoethanolamide 1.0 (10) Lauryl hydroxysulfobetaine 2.0 (11) Lauryl glucoside 3.0 (12) Polyquaternium-67 0.5 (13) Hydroxypropyl methylcellulose 0.1 (14) Acrylamide-acrylic acid-dimethyldiallylammonium chloride copolymer 0.1 (15) Ethylene glycol distearate 1.0 (16) Phytosteryl / Octyldodecyl Lauroyl Glutamate 0.5g (17) Ceramide 2 0.1 (18) Ceramide 5 0.1 (19) Trimethylglycine 1.0 (20) Polyglyceryl-4 Lauryl Ether 0.5 (21) N-acetylglucosamine 0.01 (22) Potassium chloride 0.1 (23) Sodium chloride 0.2 (24) Disodium edetate 0.1 (25) Monosodium phosphate 0.3 (26)Fragrance 0.5 (27) Purified water remainder

[0051] A body shampoo having the above composition was prepared by a conventional method, and evaluated for its foaming ability, amount of foam, cleansing properties, skin irritation, and storage stability at low temperatures. All properties were excellent, and good results (◎ or ◯) were obtained.

[0052] Prescription example 2: Body shampoo (1) Myristic acid 9.0 (2) Palmitic acid 4.0 (3) Stearic acid 1.0 (4) Potassium hydroxide 3.3 (5) Glycerin 8.0 (6) Polyoxypropylene diglyceryl ether 2.0 (7) Sodium N-lauroyl-N-methyl taurate 2.5 (8) Sodium lauroyl aspartate 0.5 (9) Coconut oil fatty acid monoethanolamide 1.0 (10) Lauryl dimethylaminoacetic acid betaine 1.0 (11) Lauryl glucoside 2.0 (12) Polyquaternium-67 0.3 (13) Hydroxypropyl methylcellulose 0.1 (14) Dimethyldiallylammonium chloride-acrylamide copolymer 0.3 (15) Ethylene glycol distearate 2.0 (16) Phytosteryl / Octyldodecyl Lauroyl Glutamate 0.5g (17) Kaolin 0.5 (18) Glucosylceramide 0.01 (19) Trimethylglycine 1.0 (20) Polyglyceryl-4 Lauryl Ether 0.5 (21) Glycosyltrehalose 2.0 (22) Potassium chloride 0.1 (23) Sodium chloride 0.1 (24) Disodium edetate 0.1 (25) Monosodium phosphate 0.4 (26)Fragrance 0.5 (27) Purified water remainder

[0053] A body shampoo having the above composition was prepared by a conventional method, and evaluated for its foaming ability, amount of foam, cleansing properties, skin irritation, and storage stability at low temperatures. All properties were excellent, and good results (◎ or ◯) were obtained.

[0054] Prescription example 3: Facial cleanser (1) Myristic acid 30.0 (2) Palmitic acid 5.0 (3) Stearic acid 5.0 (4) Potassium hydroxide 7.3 (5) Glycerin 25.0 (6) Sodium N-cocoyl-N-methyl taurate 2.0 (7) Sodium lauroyl aspartate 0.5 (8) Lauryl amidopropyl betaine 1.0 (9) Polyquaternium-7 0.2 (10) Dimethyldiallylammonium chloride-acrylamide copolymer 0.3 (11) Phytosteryl / octyldodecyl lauroyl glutamate 0.5g (12)PEG-6 2.0 (13)PEG-32 2.0 (14) Trimethylglycine 0.5 (15) Glycosyltrehalose 0.1 (16) Edetate tetrasodium 0.1 (17) Monosodium phosphate 0.5 (18) Hamamelis leaf extract 0.1 (19) Sage Leaf Extract 0.1 (20) Rosemary Leaf Extract 0.1 (21) Artichoke Leaf Extract 0.1 (22)Fragrance 0.4 (23) Purified water remainder

[0055] A facial cleanser with the above composition was prepared by a conventional method, and evaluated for its foaming ability, foam volume, cleansing properties, skin irritation, and storage stability at low temperatures. All of these properties were found to be excellent. The results were excellent (◎ or 〇).

Claims

1. A detergent composition containing a salt of a higher fatty acid having 14 to 18 carbon atoms, Contains the following (A) and (B): The content of (B) in the total mass of the cleaning composition is 0.01 to 0.5 mass %, and A cleaning composition characterized by being substantially free of sodium chloride. (A) edetate disodium (B) Monosodium dihydrogen phosphate

2. 2. The cleaning composition according to claim 1, wherein the amount of (A) is 0.01 mass % or more of the total mass of the cleaning composition.

3. A detergent composition containing a salt of a higher fatty acid having 14 to 18 carbon atoms is blended with the following (A) and (B): The content of (B) in the total mass of the cleaning composition is 0.01 to 0.5 mass %, and A method for stabilizing the storage of a detergent composition at low temperatures, characterized in that sodium chloride is not intentionally blended. (A) edetate disodium (B) Monosodium dihydrogen phosphate

Images