Cleansing agent composition

Abstract

To provide a cleansing agent composition which achieves high storage stability and also exhibits high foamability, thereby offering pleasant user sensation.SOLUTION: A cleansing agent composition comprises an organic acid, a carbonate, and a surfactant. The organic acid includes 90 mass% or more of lactonic acid.SELECTED DRAWING: None

Description

Technical Field

[0001] The present invention relates to a detergent composition.

Background Art

[0002] A mixture of carbonate and organic acid generates carbon dioxide gas by adding a small amount of water. Utilizing this property, a technique for cosmetics that generate fine bubbles of carbon dioxide gas has been reported (Patent Document 1). However, a mixture of carbonate and organic acid generates carbon dioxide gas during storage even in the presence of a trace amount of water, and water is generated as a by-product by the reaction, resulting in a chain reaction. As a result, there are problems such as swelling of the packaging material and a decrease in foaming properties during use.

[0003] Regarding this problem, techniques for improving storage stability have been reported. For example, Patent Document 2 discloses a briquette preparation having improved storage stability by containing polyethylene glycol and polyvinylpyrrolidone. Further, Patent Document 3 discloses a bath agent having good storage stability by containing the following components (A) to (C): (A) 25 to 55% by mass of an alkali metal carbonate in which 50% or more of the particles have a particle size of 180 μm or more, (B) 40 to 70% by mass of an organic acid in which 50% or more of the particles have a particle size of 180 μm or more, and (C) 0.01 to 10% by mass of a hardly water-soluble metal oxide.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Patent Document 3

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, the technical fields and required functions / effects of bath agents and detergents are different. When applying these technologies to detergents, for example, when using a solid polymer compound such as polyethylene glycol at room temperature, the storage stability is enhanced, but the immediate solubility of the detergent decreases, resulting in a deteriorated feel during use or delayed foaming. Also, when a poorly water-soluble metal oxide is incorporated into the detergent, the foaming property of the detergent deteriorates. Thus, it has been found that the detergency and usability as a detergent are impaired. Therefore, an object of the present invention is to provide a detergent composition with good foaming properties that can achieve high storage stability and ensure detergency as a detergent.

Means for Solving the Problems

[0006] Therefore, as a result of various studies on the technology of detergents that foam with carbonates, organic acids, and surfactants, the inventors have surprisingly found that when the organic acid contained in the detergent composition contains lactonic acid, the storage stability of the detergent composition can be ensured and high foaming properties are achieved because the immediate solubility is not decreased. That is, the present invention is a detergent composition containing an organic acid, a carbonate, and a surfactant, wherein the organic acid contains 90% by mass or more of lactonic acid, and relates to a detergent composition.

Effects of the Invention

[0007] By using the detergent composition of the present invention, a detergent with high storage stability and good foaming properties can be obtained.

Modes for Carrying Out the Invention

[0008] [Detergent Composition] The detergent composition of the present invention is a solid detergent composition containing an organic acid, a carbonate, and a surfactant, and the organic acid contains 90% by mass or more of lactonic acid. By adopting the above configuration, the detergent composition of the present invention has high storage stability. By adding water to the detergent composition and dissolving it, a foamed detergent can be obtained without performing foaming operations such as rubbing with the palm of the hand. Hereinafter, in this specification, a detergent foamed by adding water to a detergent composition is also referred to as a "foamed detergent".

[0009] The reason why the detergent composition of the present invention has high storage stability and high foaming property is not clear, but it is considered as follows. Since the detergent composition of the present invention contains a surfactant, an aqueous solution of the surfactant is formed when dissolved in water. In addition, since the detergent composition also contains a carbonate and an organic acid, carbon dioxide gas is generated in the aqueous solution of the surfactant when dissolved in water. Therefore, it is considered that the generated carbon dioxide gas is immediately wrapped by the film of the aqueous solution of the surfactant, generating a large amount of fine bubbles, which gives a good feeling of use during washing with the foamed detergent. In addition, the organic acid contained in the detergent composition of the present invention includes lactonic acid. Lactonic acid hydrolyzes to hydroxycarboxylic acid when reacting with the moisture contained in the air, thus acting as a moisture absorbent. To suppress the generation of carbon dioxide gas during the storage of the detergent composition, the detergent composition of the present invention is considered to have high storage stability. In addition, different from moisture absorbents such as hardly water-soluble metal oxides, hydroxycarboxylic acid does not impair the foaming property during use. It is considered that a detergent having high foaming property and good feeling of use can be obtained with the detergent composition of the present invention.

[0010] <Organic acid> The detergent composition of the present invention contains an organic acid, and the organic acid includes lactonic acid. Lactonic acid means a conjugated unsaturated lactone structure having at least one hydroxy group, and the conjugate base after the hydroxy group releases a proton has a resonance structure. As the lactone acid, ascorbic acid, isoascorbic acid, and their derivatives are preferable, and one or more selected from the group consisting of ascorbic acid and isoascorbic acid are more preferable. In the present invention, ascorbic acid and isoascorbic acid include their enantiomers. Further, as derivatives of ascorbic acid and isoascorbic acid as lactone acids, they are esterified products and / or etherified products of any one or more of the hydroxyl groups at the 2-position, 5-position, and 6-position of ascorbic acid or isoascorbic acid.

[0011] Examples of other organic acids of the lactone acid include citric acid, tartaric acid, malic acid, malonic acid, pyridonecarboxylic acid, succinic acid, fumaric acid, adipic acid, glutaric acid, etc., and one or more of these organic acids can be used. Among these, one or more selected from the group consisting of citric acid and succinic acid are preferable.

[0012] From the viewpoint of improving foaming properties, the content of the organic acid in the detergent composition is preferably 5% by mass or more, more preferably 7% by mass or more, still more preferably 10% by mass or more, even more preferably 15% by mass or more, even more preferably 20% by mass or more, and even more preferably 25% by mass or more. Further, from the viewpoint of keeping the pH of the foaming detergent in a suitable range, it is preferably 60% by mass or less, more preferably 55% by mass or less, still more preferably 50% by mass or less, and even more preferably 40% by mass or less. Also, from the viewpoint of improving storage stability, the content of lactone acid in the organic acid is preferably 90% by mass or more, more preferably 95% by mass or more, and preferably 100% by mass or less, more preferably 100% by mass. From the viewpoint of improving foaming properties, the content of lactone acid in the detergent composition is preferably 5% by mass or more, more preferably 7% by mass or more, still more preferably 10% by mass or more, even more preferably 15% by mass or more, even more preferably 20% by mass or more, and even more preferably 25% by mass or more. Further, from the viewpoint of keeping the pH of the foaming detergent in a suitable range, it is preferably 60% by mass or less, more preferably 55% by mass or less, still more preferably 50% by mass or less, and even more preferably 40% by mass or less.

[0013] <Carbonate> The detergent composition of the present invention contains a carbonate. When the detergent composition is dissolved in water, the carbonate generates carbon dioxide gas by acting with an organic acid, and thus excellent detergency can be exhibited.

[0014] Examples of the carbonate include dialkali metal carbonates such as sodium carbonate and potassium carbonate, alkaline earth metal carbonates such as calcium carbonate and magnesium carbonate, and alkali metal hydrogen carbonates such as sodium hydrogen carbonate and potassium hydrogen carbonate. One or more of these can be used. Among the above, from the viewpoint of foamability, one or more selected from the group consisting of sodium carbonate and sodium hydrogen carbonate are preferable, and sodium hydrogen carbonate is more preferable.

[0015] From the viewpoint of improving foamability, the content of the carbonate in the detergent composition is preferably 10% by mass or more, more preferably 15% by mass or more, and still more preferably 20% by mass or more. Also, from the viewpoint of improving foam retention, it is preferably 60% by mass or less, more preferably 55% by mass or less, and still more preferably 50% by mass or less.

[0016] <Surfactant> The detergent composition of the present invention contains a surfactant. Examples of the surfactant include anionic surfactants, cationic surfactants, amphoteric surfactants, and nonionic surfactants, and one or more of each can be arbitrarily selected and used. Among them, anionic surfactants are preferable from the viewpoints of good solubility in water and good foaming property. Specific examples of each are shown below.

[0017] 〔Anionic surfactant〕 Specific examples of the anionic surfactant include N-acyl amino acid salts, N-acyl-N-methyl amino acid salts, fatty acid salts, salts of esters of fatty acids having 5 to 18 carbon atoms and isethionic acid, alkyl or alkenyl sulfonates having 10 to 18 carbon atoms, polyoxyalkylene alkyl ether sulfate ester salts, and linear alkylbenzene sulfonate salts, etc.

[0018] As counter ions of the anionic group of the anionic surfactant, there are alkali metal ions such as sodium ions and potassium ions; alkaline earth metal ions such as calcium ions and magnesium ions; ammonium ions; alkanolammonium having 1 to 3 alkanol groups with 2 or 3 carbon atoms (for example, monoethanolammonium, diethanolammonium, triethanolammonium, triisopropanolammonium, etc.). Among them, sodium ions and potassium ions are preferred, and sodium ions are more preferred.

[0019] 〔Cationic surfactant〕 Examples of the cationic surfactant include quaternary ammonium salts such as alkyltrimethylammonium salts, alkoxyalkyltrimethylammonium salts, dialkyldimethylammonium salts, alkylamidoalkyltrimethylammonium salts, benzalkonium chloride, and alkylpyridinium salts.

[0020] As counter ions of the cationic group of the cationic surfactant, there are alkyl sulfate ions having 1 to 3 carbon atoms, sulfate ions, phosphate ions, carboxylic acid ions having 1 to 3 carbon atoms (formate ions, acetate ions, propionate ions), and halide ions such as chloride ions and bromide ions. Among these, from the viewpoints of ease of production and availability of raw materials, halide ions are preferred, and chloride ions are more preferred.

[0021] 〔Amphoteric surfactant〕 Examples of the amphoteric surfactant include at least one selected from alkylamine oxides having an alkyl group with 10 to 18 carbon atoms and alkyl betaines having an alkyl group with 10 to 18 carbon atoms.

[0022] [Nonionic surfactant] Examples of the nonionic surfactant include one or more selected from the group consisting of polyoxyethylene alkyl ether, polyoxyethylene alkenyl ether, polyoxyethylene sorbitan fatty acid ester, polyoxyethylene sorbit fatty acid ester, polyoxyethylene fatty acid ester, alkyl glucoside, alkyl alkanolamide, alkyl glyceryl ether, higher fatty acid sucrose ester, polyglycerin fatty acid ester, polyoxyethylene hydrogenated castor oil, and alkyl saccharide. Among these, anionic surfactants are preferred from the viewpoints of good solubility in water and good foaming.

[0023] From the viewpoint of improving foaming properties, the content of the surfactant in the detergent composition is preferably 2% by mass or more, more preferably 3% by mass or more, still more preferably 5% by mass or more, even more preferably 10% by mass or more, even more preferably 15% by mass or more, and even more preferably 20% by mass or more. Also, from the viewpoint of improving foam breakage, it is preferably 50% by mass or less, more preferably 45% by mass or less, and still more preferably 40% by mass or less.

[0024] From the viewpoint of improving foaming properties, the total content of carbonate, organic acid, and surfactant in the detergent composition is preferably 50% by mass or more, more preferably 60% by mass or more, still more preferably 65% by mass or more, and from the viewpoint of improving stability, it is preferably 95% by mass or less, more preferably 90% by mass or less, and even more preferably 85% by mass or less.

[0025] In the cleaning agent composition of the present invention, within a range not impairing the object of the present invention, as other components, components usually used in solid preparations can be appropriately contained. Examples of such components include excipients, humectants, binders, natural pigments, moisturizers, anti-inflammatory agents, bactericides, antiperspirants, antioxidants, fragrances, and mixtures thereof.

[0026] Examples of excipients include silicic acid, silicic anhydride (silica), magnesium silicate, calcium silicate, aluminum silicate, barium silicate, strontium silicate, diatomaceous earth, talc, sericite, mica, kaolin, montmorillonite, clay, bentonite, vermiculite, titanium oxide-coated mica (mica titanium), bismuth oxy chloride, boron nitride, metal tungstates, hydroxyapatite, zeolite, ceramic powder, chlorohydroxyaluminum, aluminum chloride, aluminum sulfate, basic aluminum bromide, basic aluminum iodide, chlorohydroxyaluminum zirconium, zinc sulfate, basic aluminum zinc lactate, calcium sulfate, barium sulfate, magnesium sulfate, red iron oxide, ultramarine, dark blue, chromium hydroxide, calamine, carbon black, etc.; monosaccharides such as glucose, fructose, galactose, mannose, etc.; disaccharides such as lactose, trehalose, maltose, etc.; starches such as starch, potato starch, etc.; polysaccharides such as dextrin, (crystalline) cellulose, carrageenan, etc.; sugar alcohols such as mannitol, maltitol, xylitol, erythritol, etc.

[0027] Examples of humectants include oxides of alkaline earth metals such as magnesium oxide, calcium oxide, zinc oxide, etc., and magnesium oxide is preferred. Also, from the viewpoint of foamability, it is preferable that the cleaning agent composition of the present invention does not substantially contain a humectant.

[0028] (Dosage form) The dosage form (product form) when using the cleaning agent composition of the present invention is not particularly limited. However, from the viewpoint of handling properties when dissolved in water, it is preferably a powder or a tablet, and more preferably a powder from the viewpoint of enhancing foaming properties and improving the usability. When the cleaning agent composition of the present invention is a powder, it is preferable to contain a granulated powder of an organic acid, a surfactant, and other components used as necessary, and a carbonate, as the storage stability is further enhanced. In the case of a powder, the proportion of particles of 100 μm or more is preferably 10% by mass or more, more preferably 20% by mass or more, still more preferably 30% by mass or more, and even more preferably 40% by mass or more from the viewpoint of improving storage stability. Also, from the viewpoint of productivity, it is preferably 95% by mass or less, more preferably 90% by mass or less, still more preferably 85% by mass or less, and even more preferably 80% by mass or less.

[0029] (Properties) The cleaning agent composition of the present invention is used by adding it to water and dissolving it. From the viewpoint of foaming properties, the pH of a 5% by mass aqueous solution of the cleaning agent composition at 25°C is preferably 5.8 or more, more preferably 6.3 or more, and preferably 7.8 or less, more preferably 7.3 or less. Specifically, the above pH can be measured by the method described in the examples.

[0030] [Method for producing a cleaning agent composition] The method for producing the cleaning agent composition of the present invention is not particularly limited. For example, it can be produced by blending an organic acid, a carbonate, a surfactant, and other components used as necessary, and mixing them using a known stirring device or the like. When the cleaning agent composition of the present invention is a granulated powder, a known method can be used as the granulation method. For example, a fluidized bed granulation method, a stirring granulation method, a rolling granulation method, an extrusion granulation method, etc. can be mentioned. Among the above, the fluidized bed granulation method is preferable from the viewpoint of improving the solubility of the cleaning agent composition in water. Specifically, for example, raw materials other than carbonates are charged into a fluidized bed granulator, and granulation can be carried out by adding a binder solution in which a binder is dissolved in water, ethanol or a mixture thereof to the uniformly mixed powder particles.

[0031] [Usage method] The detergent composition of the present invention can be suitably used, for example, for face washing, hair washing, and body washing. The detergent composition of the present invention is a foaming detergent composition that starts to foam naturally by adding water. Therefore, it foams quickly and does not require a special foaming operation, so it can be used easily. As a method of using the detergent composition of the present invention, for example, take the detergent composition in the palm of the hand, add water to the detergent composition, confirm that it has foamed moderately, and then apply it to the face, hair, whole body, etc. to be washed and wash. The amount of water added to the detergent composition is not particularly limited, but from the viewpoint of improving the solubility and foaming property of the detergent composition and as a result improving the detergency, the mass ratio of the detergent composition to the added water (detergent composition / water) is preferably 1 / 30 or more, more preferably 1 / 25 or more, still more preferably 1 / 20 or more, and preferably 1 / 0.5 or less, more preferably 1 / 1 or less, still more preferably 1 / 2 or less. The temperature of the water added to the detergent composition is not particularly limited, but it is preferably 15°C or higher and 45°C or lower. The detergent composition of the present invention can be suitably used for face care products such as facial cleansers and body care products such as hand soaps and body soaps.

Examples

[0032] Hereinafter, the present invention will be described by way of examples, but the present invention is not limited to the scope of the examples.

[0033] (Preparation of mixed surfactant) 300 g of sodium N-myristoyl-L-glutamate (Amisoft MS manufactured by Ajinomoto Co., Inc.) and 291.5 g of sodium N-lauroyl-L-glutamate (Amisoft LS manufactured by Ajinomoto Co., Inc.) were mixed at room temperature to obtain a mixed surfactant.

[0034] Example 1 (Preparation of Detergent Composition) 142.3 g of ascorbic acid (Vitamin C type S manufactured by Fuso Chemical Industry Co., Ltd.), 106.5 g of a mixed surfactant, and 46.7 g of talc (SW-K4 manufactured by Asada Flour Milling Co., Ltd.) were charged into a fluidized bed granulator (FD-MP-01E manufactured by Powrex), and 283 g of a 1.6% carrageenan aqueous solution was added at a rate of 5 g / min while granulating under the conditions of an air volume of 0.3 m 3 / min and an intake air temperature of 80°C, and dried with hot air at 80°C for 30 minutes to obtain a granulated product with a median diameter of 180 μm and 61% by mass of particles of 100 μm or more. The obtained granulated product and 152.7 g of sodium hydrogen carbonate (manufactured by AGC Inc.) were put into a bag and manually mixed in a transparent plastic bag until visually uniform to prepare Detergent Composition 1.

[0035] (Storage Stability Test) At 50°C and a relative humidity of 50%, 4.7 g of Detergent Composition 1 (equivalent to 1.58 g as sodium hydrogen carbonate) was sealed in an aluminum packaging material of 80 mm × 50 mm × 18 mm, and the expansion volume of the bag after storage at 50°C for 4 weeks was measured. Specifically, a water tank filled with water at 25°C was placed on a scale and its weight was measured. Next, the aluminum packaging material containing the detergent composition was completely submerged in the water tank and its mass was measured. The difference in mass before and after submerging the aluminum packaging material in water was converted to volume using the density of water as 1.0 g / ml based on Archimedes' principle, and this was taken as the volume of the aluminum packaging material before storage. Then, the same measurement was carried out after 4 weeks of storage to obtain the volume of the aluminum packaging material after storage, and the expansion amount of the aluminum packaging material before and after storage was obtained from the difference in the volume of the aluminum packaging material before and after storage. A smaller expansion amount indicates better storage stability. The results are shown in Table 1.

[0036] (Foaming Property Test) 1.2 g (0.4 g as sodium hydrogen carbonate) of Detergent Composition 1 and 10 g of hot water at 42°C were put into a graduated cylinder and stirred with a stirrer under the condition of 100 rpm. The foaming amount over time for 5 minutes was measured, and the foam amount was evaluated as the foaming property. The results are shown in Table 1.

[0037] (pH of the Detergent Composition) 50 g of ion-exchanged water was added to 2.4 g of Detergent Composition 1 and stirred for 3 minutes. The pH of the aqueous solution of Detergent Composition 1 was then evaluated using a pH meter (F-54 manufactured by HORIBA), and the pH was 6.8.

[0038] (Measurement of Particle Size) The median diameter was measured using 3 g of the detergent composition with a Camsizer XT (particle size measuring device, manufactured by RETSCH Co., Ltd.). The mass ratio of particles of 100 μm or more was determined by sieving 10 g of the detergent composition through a sieve with a mesh size of 100 μm, and calculating the ratio of particles with a particle size of 100 μm or more in the detergent composition as a mass percentage.

[0039] Example 2 142.3 g of ascorbic acid (vitamin C type S), 106.5 g of a mixed surfactant, 46.7 g of talc (SW-K4 manufactured by Asada Flour Milling Co., Ltd.), 4.53 g of carrageenan, and 152.7 g of sodium hydrogen carbonate (manufactured by AGC Inc.) were manually mixed in a bag to prepare Detergent Composition 2.

[0040] Example 3 Detergent Composition 3 was prepared in the same manner as in Example 2, except that the organic acid was isoascorbic acid. The results of evaluating Detergent Composition 3 in the same manner as in Example 1 are shown in Table 1.

[0041] Examples 4 and 5 Detergent Compositions 4 and 5 were prepared in the same manner as in Example 2, except that the blending amounts of the mixed surfactant and talc were the blending amounts described in Table 1. The results of evaluating Detergent Compositions 4 and 5 in the same manner as in Example 1 are shown in Table 1.

[0042] Example 6 Detergent Composition 6 was prepared in the same manner as in Example 2, except that the organic acid was a mixture of ascorbic acid and citric acid, and the blending amounts of each component were the blending amounts described in Table 1. The results of evaluating Detergent Composition 6 in the same manner as in Example 1 are shown in Table 1.

[0043] Comparative Examples 1 and 2 Detergent compositions C1 and C2 were prepared in the same manner as in Example 6, except that the blending amounts of the respective components were the blending amounts described in Table 1. The results of evaluating the detergent compositions C1 and C2 in the same manner as in Example 1 are shown in Table 1.

[0044] Comparative Example 3 67.4 g of citric acid (citric anhydride 60 manufactured by Iwata Chemical Industry Co., Ltd.), 118.3 g of a mixed surfactant, 109.3 g of talc (SW-K4 manufactured by Asada Flour Milling Co., Ltd.), 5.0 g of carrageenan, and 203 g of sodium hydrogen carbonate (manufactured by AGC Inc.) were put into a bag and manually mixed in a transparent plastic bag until visually uniform to prepare a detergent composition C3. The results of evaluating the detergent composition C3 in the same manner as in Example 1 are shown in Table 1.

[0045] (Storage stability test) 3.9 g (equivalent to 1.58 g as sodium hydrogen carbonate) of the detergent composition C1 was sealed in an aluminum packaging material of 80 mm × 50 mm × 18 mm, and the expansion volume of the bag after storing at 50 °C for 4 weeks was measured. The results are shown in Table 1.

[0046] (Foaming property test) 1.0 g (equivalent to 0.4 g as sodium hydrogen carbonate) of the detergent composition C1 and 10 g of hot water at 42 °C were put into a graduated cylinder and stirred with a stirrer under the condition of 100 rpm. The amount of foam generated over time for 5 minutes was measured, and the amount of foam was evaluated as the foaming property. The results are shown in Table 1.

[0047] (pH of the detergent composition) When 50 g of ion-exchanged water was added to 2.4 g of the detergent composition C1 and stirred for 3 minutes, and the pH of the aqueous solution of the detergent composition C1 was evaluated with a pH meter (F-54 manufactured by HORIBA), the pH was 6.8.

[0048]

Table 1

[0049] From Table 1, it can be seen that the detergent composition of this example is excellent in storage stability and has high foaming properties similar to Comparative Example 3 using only citric acid, which is an organic acid. Further, from the comparison between Examples 1 and 2, it can be seen that the detergent composition in which the compounding components other than sodium hydrogen carbonate are granulated to increase the particle size is more excellent in storage stability.

Industrial Applicability

[0050] According to the detergent composition of the present invention, a detergent having high storage stability and good foaming properties can provide a good feeling of use such as the touch during use. The detergent composition can be used in face care products such as facial cleansers, body care products such as hand soaps and body soaps, and hair care products such as shampoos.

Claims

**Claim 1** A detergent composition containing an organic acid, a carbonate, and a surfactant, wherein the organic acid contains 90% by mass or more of lactone acid. The detergent composition. **Claim 2** The detergent composition according to claim 1, wherein the lactone acid is one or more selected from the group consisting of ascorbic acid and isoascorbic acid. **Claim 3** The detergent composition according to claim 1 or 2, wherein the detergent composition contains 2% by mass or more of the surfactant. **Claim 4** The detergent composition according to any one of claims 1 to 3, wherein the carbonate is one or more selected from the group consisting of sodium carbonate and sodium hydrogen carbonate. **Claim 5** The detergent composition according to any one of claims 1 to 4, wherein the detergent composition contains 26% by mass or more and 40% by mass or less of the lactone acid. **Claim 6** The detergent composition according to any one of claims 1 to 5, wherein the detergent composition contains 10% by mass or more and 60% by mass or less of the carbonate.

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