Cleaning Composition

Abstract

To provide a novel washing composition which is less likely to cause soap scum.SOLUTION: A washing composition includes a fatty acid soap. The fatty acid soap includes, as fatty acid constitution, an unsaturated fatty acid and a saturated fatty acid having a carbon number of 12 or more. In the fatty acid constitution, the content of the unsaturated fatty acid is 22 mass% or more and the content of the saturated fatty acid having the carbon number of 12 or more is 65 mass% or less.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to a cleaning composition that is less likely to produce soap scum. [Background technology]

[0002] Fatty acid soaps are cleaning agents that have been used for a long time and are produced by saponifying vegetable oils and fats or by neutralizing fatty acids with potassium hydroxide or sodium hydroxide. The potassium and sodium fatty acids obtained through saponification are used to clean the body, including skin and hair, and household items such as clothing and tableware, but they react with alkaline earth metals such as calcium and magnesium contained in tap water to form water-insoluble substances such as fatty acid calcium salts and fatty acid magnesium salts. Fatty acid calcium salts and fatty acid magnesium salts (soap scum) cause problems in normal household use, such as making hair feel rough and appearing as white spots on dark-colored clothing. To address this issue, moisturizers and chelating agents have been added to reduce the harshness of hair and whitening of clothing, etc. In recent years, however, an increasing number of consumers have begun to prefer products that use natural ingredients and minimize additives, creating a need for a solution to the above problems without using petroleum-derived ingredients or additives.

[0003] Furthermore, as means for solving the above problems, there have been disclosed liquid detergent compositions containing alkyl polyglycosides, organic acid salts and / or inorganic acid salts in addition to fatty acid salts (Patent Document 1), framed soap compositions containing alkyl ether carboxylic acids or salts thereof in addition to fatty acids having 8 to 22 carbon atoms or their sodium salts (Patent Document 2), and water-added fire extinguishing agents containing sodium and / or potassium oleate salts (Patent Document 3). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2004-035808 [Patent Document 2] Patent No. 5427966 [Patent Document 3] Patent No. 5388260 Summary of the Invention [Problem to be solved by the invention]

[0005] In view of the above prior art, the problem to be solved by the present invention is to provide a novel cleaning composition that is less likely to produce soap scum. [Means for solving the problem]

[0006] The present invention, which solves the above-mentioned problems, is a cleaning composition containing a fatty acid soap, wherein the fatty acid soap contains, as a fatty acid composition, unsaturated fatty acids and saturated fatty acids having 12 or more carbon atoms, and the content of unsaturated fatty acids in the fatty acid composition is 22% by mass or more and the content of saturated fatty acids having 12 or more carbon atoms is 65% by mass or less. Such a cleaning composition is less likely to produce soap scum.

[0007] In a preferred embodiment of the present invention, the unsaturated fatty acid includes erucic acid. Such a cleaning composition is less likely to produce soap scum.

[0008] In a preferred form of the invention, it is in liquid form. Such cleaning compositions are easy to handle.

[0009] In a preferred embodiment of the present invention, the unsaturated fatty acid includes linoleic acid, and the linoleic acid content in the fatty acid composition is 3% by mass or more and 23% by mass or less. Such a cleaning composition is less likely to produce soap scum and has excellent oxidation stability.

[0010] In a preferred embodiment of the present invention, the unsaturated fatty acids include linoleic acid and oleic acid, and the mass ratio of the linoleic acid to the oleic acid is 1:1 to 1:6. Such a cleaning composition is less likely to produce soap scum.

[0011] In a preferred embodiment of the present invention, the fatty acid soap contains saturated fatty acids having 10 to 14 carbon atoms as a fatty acid composition, and the content of saturated fatty acids having 10 to 14 carbon atoms in the fatty acid composition is 60 mass % or less. Such a cleaning composition is less likely to produce soap scum.

[0012] In a preferred embodiment of the present invention, the fatty acid composition contains saturated fatty acids having 8 to 10 carbon atoms in an amount of 6% by mass or more. Such a cleaning composition is less likely to produce soap scum.

[0013] In a preferred embodiment of the present invention, the composition is substantially free of petroleum-based surfactants and / or chelating agents. Such cleansing compositions can be used by people with sensitive skin and are readily biodegradable. [Effects of the Invention]

[0014] According to the present invention, it is possible to provide a cleaning composition that is less likely to produce soap scum. In addition, in a preferred embodiment of the present invention, a cleaning composition that is less likely to generate soap scum and is less likely to oxidize can be provided. [Brief explanation of the drawings]

[0015] [Figure 1] FIG. 10 is a diagram showing standards for laundry evaluation values. DETAILED DESCRIPTION OF THE INVENTION

[0016] The present invention is a cleaning composition comprising a fatty acid soap. The fatty acid soap included in the present invention is characterized in that its fatty acid composition contains unsaturated fatty acids and saturated fatty acids with 12 or more carbon atoms, and the unsaturated fatty acid content in the fatty acid composition is 22% by mass or more and the saturated fatty acid content with 12 or more carbon atoms is 65% by mass or less.

[0017] A preferred embodiment of the fatty acid composition of the fatty acid soap contained in the cleaning composition of the present invention will be described below.

[0018] In the present invention, the fatty acid soap is produced from a fatty acid and a base. Examples of fatty acids include acetic acid, propionic acid, butyric acid, valeric acid, caproic acid, caprylic acid, pelargonic acid, capric acid, lauric acid, myristic acid, palmitic acid, stearic acid, oleic acid, zomalic acid, linoleic acid, linolenic acid, alamic acid, gadoleic acid, behenic acid, erucic acid, lignoceric acid, selacholeic acid, cerotic acid, montanic acid, melissic acid, ceroplastic acid, and ricinoleic acid. Furthermore, mixed fatty acids derived from natural fats and oils containing these fatty acids may also be used.

[0019] The base that reacts with the fatty acid to produce soap is not particularly limited, but is preferably sodium hydroxide and / or potassium hydroxide.

[0020] The fatty acid soap in the cleaning composition of the present invention is preferably a potassium fatty acid and / or a sodium fatty acid.

[0021] The fatty acid soap in the cleaning composition of the present invention contains, as its fatty acid composition, unsaturated fatty acids and saturated fatty acids having 12 or more carbon atoms.

[0022] Examples of unsaturated fatty acids include monounsaturated fatty acids such as palmitoleic acid, oleic acid, and erucic acid, and polyunsaturated fatty acids such as linoleic acid, eicosadienoic acid, docosadienoic acid, α-linolenic acid, γ-linolenic acid, pinolenic acid, stearidonic acid, arachidonic acid, and docosahexaenoic acid.

[0023] Examples of saturated fatty acids having 12 or more carbon atoms include lauric acid, myristic acid, palmitic acid, stearic acid, arachidic acid, and behenic acid.

[0024] The fatty acid soap in the cleaning composition of the present invention may contain, as its fatty acid composition, saturated fatty acids other than the saturated fatty acids having 12 or more carbon atoms. Examples of saturated fatty acids other than the saturated fatty acids having 12 or more carbon atoms include butyric acid, caproic acid, caprylic acid, and capric acid.

[0025] The fatty acid composition contains unsaturated fatty acids in an amount of 22% by mass or more, and saturated fatty acids having 12 or more carbon atoms in an amount of 65% by mass or less.

[0026] The content of unsaturated fatty acids in the fatty acid composition is more preferably 30% by mass or more, even more preferably 40% by mass or more, still more preferably 45% by mass or more, and particularly preferably 55% by mass or more. The content of unsaturated fatty acids in the fatty acid composition is preferably 90% by mass or less, more preferably 80% by mass or less, even more preferably 70% by mass or less, and particularly preferably 60% by mass or less.

[0027] The content of saturated fatty acids having 12 or more carbon atoms in the fatty acid composition is more preferably 60% by mass or less, even more preferably 50% by mass or less, still more preferably 40% by mass or less, and particularly preferably 35% by mass or less. Furthermore, the content of saturated fatty acids having 12 or more carbon atoms in the fatty acid composition is preferably 5% by mass or more, more preferably 10% by mass or more, even more preferably 20% by mass or more, and particularly preferably 25% by mass or more.

[0028] The total content of the saturated fatty acids having 12 or more carbon atoms and the unsaturated fatty acids in the fatty acid composition is preferably 80% by mass or more, and the mass ratio is 1:4 to 1:0.25, more preferably 1:3 to 1:0.33, and particularly preferably 1:2 to 1:0.5.

[0029] The fatty acid soap in the cleaning composition of the present invention preferably contains saturated fatty acids having 8 to 10 carbon atoms as its fatty acid composition. The content of saturated fatty acids having 8 to 10 carbon atoms in the fatty acid composition is preferably 6% by mass or more, more preferably 7% by mass or more, and particularly preferably 8% by mass or more. Furthermore, the content of saturated fatty acids having 8 to 10 carbon atoms in the fatty acid composition is preferably 20% by mass or less, more preferably 15% by mass or less, and particularly preferably 10% by mass or less. Examples of saturated fatty acids having 8 to 10 carbon atoms include caprylic acid and capric acid.

[0030] The fatty acid soap in the cleaning composition of the present invention preferably contains linoleic acid and oleic acid as its fatty acid composition. The mass ratio of the linoleic acid to the oleic acid is preferably 1:1 to 1:6, more preferably 1:1 to 1:5, and particularly preferably 1:1 to 1:4.

[0031] The fatty acid soap in the cleaning composition of the present invention preferably contains erucic acid as a fatty acid component. The erucic acid content in the fatty acid composition is preferably 15% by mass or less, more preferably 8% by mass or less, and particularly preferably 6% by mass or less.

[0032] The linoleic acid content in the fatty acid composition is preferably 3% by mass or more, more preferably 5% by mass or more, even more preferably 7% by mass or more, and particularly preferably 10% by mass or more. The linoleic acid content in the fatty acid composition is preferably 25% by mass or less, more preferably 23% by mass or less, even more preferably 20% by mass or less, and particularly preferably 15% by mass or less.

[0033] The oleic acid content in the fatty acid composition is preferably 20% by mass or more, more preferably 25% by mass or more, even more preferably 30% by mass or more, and particularly preferably 35% by mass or more. The oleic acid content in the fatty acid composition is preferably 60% by mass or less, more preferably 50% by mass or less, even more preferably 45% by mass or less, and particularly preferably 40% by mass or less.

[0034] The fatty acid soap in the cleaning composition of the present invention preferably contains saturated fatty acids having 10 to 14 carbon atoms as its fatty acid composition. The content of saturated fatty acids having 10 to 14 carbon atoms in the fatty acid composition is preferably 60% by mass or less, more preferably 50% by mass or less, even more preferably 40% by mass or less, still more preferably 35% by mass or less, and particularly preferably 30% by mass or less. The content of saturated fatty acids having 10 to 14 carbon atoms in the fatty acid composition is preferably 5% by mass or more, more preferably 10% by mass or more, and particularly preferably 15% by mass or more. Examples of saturated fatty acids having 10 to 14 carbon atoms include capric acid, lauric acid, and myristic acid.

[0035] In the present invention, the fatty acid soap is preferably one in which fatty acids are neutralized or fats and oils are saponified, within the range of the fatty acid content of the present invention.

[0036] In the present invention, animal and vegetable oils are preferably used as the fats and oils. In the present invention, the animal and vegetable oils refer to natural fats and oils derived from animals and plants, and processed fats and oils obtained from such natural fats and oils. Examples of such natural fats and oils include soybean oil, rapeseed oil, rice bran oil, cottonseed oil, safflower oil, sunflower oil, rapeseed oil, corn oil, palm oil, palm kernel oil, coconut oil, castor oil, olive oil, camellia oil, argan oil, baobab oil, macadamia nut oil, almond oil, rosehip oil, MCT, fish oil, beef tallow, lard, and milk fat, as well as modified fats and oils obtained by fractionation, hydrogenation, interesterification, or the like, and mixtures thereof. These fats and oils can be used in either refined or unrefined forms, but refined forms are preferred. In the present invention, it is preferable to use one or more selected from the above-mentioned fats and oils.

[0037] In the present invention, it is more preferable to use one or more oils selected from palm oil, palm kernel olein, coconut oil, MCT, high oleic sunflower oil, highly hydrogenated hyercin rapeseed oil, hyercin rapeseed oil, castor oil, and rice bran oil.

[0038] In the present invention, the palm kernel olein content in the total fats and oils is preferably 20% by mass or more, more preferably 30% by mass or more, and even more preferably 40% by mass or more. The palm kernel oil olein content in the total fats and oils is preferably 70% by mass or less, 60% by mass or less, and more preferably 50% by mass or less.

[0039] In the present invention, the MCT content in the total fats and oils is preferably 1% by mass or more, more preferably 2% by mass or more, and even more preferably 3% by mass or more. The MCT content in the total fats and oils is preferably 20% by mass or less, more preferably 15% by mass or less, and even more preferably 12% by mass or less.

[0040] In the present invention, the content of high oleic sunflower oil in the total fats and oils is preferably 5% by mass or more, more preferably 10% by mass or more, and even more preferably 15% by mass or more. In the present invention, the content of high oleic sunflower oil in the total fats and oils is preferably 40% by mass or less, more preferably 35% by mass or less, and even more preferably 30% by mass or less.

[0041] In the present invention, the content of hyercin rapeseed oil in the total fats and oils is preferably 1% by mass or more, more preferably 2% by mass or more, and even more preferably 3% by mass or more. Furthermore, the content of hyercin rapeseed oil in the total fats and oils is preferably 20% by mass or less, more preferably 15% by mass or less, and even more preferably 12% by mass or less.

[0042] In the present invention, the content of rice bran oil in the total fats and oils is preferably 5% by mass or more, more preferably 10% by mass or more, and even more preferably 15% by mass or more. The content of rice bran oil in the total fats and oils is preferably 35% by mass or less, more preferably 30% by mass or less, and even more preferably 25% by mass or less.

[0043] In the present invention, it is preferable to use a combination of palm kernel olein and high oleic sunflower oil as the fat / oil. The content ratio (mass %) of palm kernel olein to high oleic sunflower oil in the total fat / oil is preferably 1:0.5 to 1:10, more preferably 1:0.5 to 1:6, and even more preferably 1:0.5 to 1:3.

[0044] In the present invention, it is preferable to use a combination of palm kernel olein and rice bran oil as the fat and oil. The content ratio (mass %) of palm kernel olein to rice bran oil in the total fat and oil is preferably 1:0.5 to 1:10, more preferably 1:0.5 to 1:6, and even more preferably 1:0.5 to 1:3.

[0045] In the present invention, it is preferable to use a combination of palm kernel olein and hyercin rapeseed oil as the fat and oil. The content ratio (mass %) of palm kernel olein to hyercin rapeseed oil in the total fat and oil is preferably 1:1 to 1:10, more preferably 1:2 to 1:8, and even more preferably 1:4 to 1:6.

[0046] In the present invention, it is preferable to use a combination of palm kernel olein, high oleic sunflower oil, and hyercin rapeseed oil as the fat or oil. It is also preferable to use a combination of palm kernel olein, rice bran oil and hyercin rapeseed oil as the fat and oil.

[0047] The fatty acid composition of fats and oils and cleaning compositions can be measured, for example, by capillary gas chromatography in accordance with the Standard Methods for Analysis of Fats and Oils (Internal 15-2003, Fatty Acid Composition (Capillary Gas Chromatography)).

[0048] The content of the fatty acid soap in the cleaning composition of the present invention is preferably 5% by mass or more, more preferably 12% by mass or more, and even more preferably 20% by mass or more. Furthermore, the content of the fatty acid soap in the cleaning composition of the present invention is preferably 42% by mass or less, more preferably 38% by mass or less, and even more preferably 35% by mass or less.

[0049] More preferred embodiments of the cleaning composition of the present invention will be described below.

[0050] The cleaning composition of the present invention is preferably in a liquid form, and in this case, it is preferable that the cleaning composition of the present invention contains water. The water may be tap water, ion-exchanged water, pure water, distilled water, etc. Among these, ion-exchanged water is preferred.

[0051] The content of water relative to the total amount of the cleaning composition of the present invention is preferably 20% by mass or more, more preferably 30% by mass or more, and even more preferably 40% by mass or more.

[0052] When the cleaning composition of the present invention contains water, the ratio of the fatty acid soap to water is preferably 1:1.5 to 1:3.5, more preferably 1:1.75 to 1:3.25, and even more preferably 1:2 to 1:3.

[0053] It is preferred that the cleaning composition of the present invention is substantially free of petroleum-based surfactants and / or chelating agents. In the present invention, the term "substantially free of" means that the substance may be contained within a range that does not impair the effects of the present invention.

[0054] The content of the petroleum-based surfactant and / or chelating agent in the cleaning composition is preferably 0.5% by mass or less, more preferably 0.3% by mass or less.

[0055] Some petroleum-based surfactants are known to easily induce irritation in the skin and cause rough skin. For this reason, many consumers are looking for cleansing compositions that do not contain petroleum-based surfactants, are less likely to cause rough skin, and have an excellent feel when used, when it comes to compositions that may come into contact with the skin. Therefore, in the present invention, it is preferable that the composition is substantially free of petroleum-based surfactants.

[0056] Chelating agents have traditionally been used to suppress the generation of soap scum. Examples of chelating agents include ethylenediaminetetraacetic acid, etidronic acid, and pentasodium pentenoate. However, these agents have been criticized for their environmental impact, such as poor biodegradability. Therefore, it is preferable that the present invention be substantially free of chelating agents. Furthermore, biodegradable chelating agents such as tetrasodium L-glutamate diacetate are known, but they have the drawback of gelling even at room temperature when mixed with soap components. In order to avoid such problems, it is preferable that the present invention is substantially free of chelating agents.

[0057] The cleaning composition of the present invention may contain optional ingredients such as fragrances, pH adjusters, thickeners, and preservatives known in the art, provided that the effects of the present invention are not impaired. Two or more of these may be used in combination. The content of the optional ingredients is not particularly limited, provided that the effects of the present invention are not impaired, and can be adjusted as needed.

[0058] The fragrance is preferably of natural origin, and examples thereof include hinokitiol, lavender oil, peppermint oil, orange oil, ylang-ylang oil, frankincense oil, laurel oil, rosewood oil, geranium oil, rose oil, mint oil, neroli oil, chamomile oil, grapefruit oil, ginger oil, tea tree oil, eucalyptus oil, sage oil, cypress oil, sandalwood oil, jasmine oil, thyme oil, marjoram oil, lemon oil, clove oil, cardamom oil, cedarwood oil, cinnamon oil, pine oil, patchouli oil, palmarosa oil, fennel oil, petitgrain oil, bergamot oil, mandarin orange oil, myrrh oil, lemongrass oil, juniper berry oil, vetiver oil, yuzu oil, anise oil, spearmint oil, ravinsara oil, and petitgrain oil.

[0059] The pH adjuster may be any inorganic acid, organic acid, non-basic acid, or organic base known in the art, with organic acids being preferred, such as citric acid, lactic acid, butyric acid, glycolic acid, and sodium citrate. Any thickener known in the art can be used, such as xanthan gum, carrageenan, guar gum, tamarind gum, locust bean gum, quince seed, dextran, hyaluronic acid, sodium alginate, gelatin, casein, collagen, agar, and the like. Any preservative known in the art can be used, and examples thereof include hinokitiol, phenethyl alcohol, tea extract, lactobacillus / radish root ferment filtrate, lactobacillus / wasabi root ferment extract, white willow bark extract, silver oxide, caprylhydroxamic acid, caprylyl glycol, propanediol, pentanediol, butylene glycol, artemisia capillaris extract, clove extract, and glycerin fatty acid esters.

[0060] The cleaning composition of the present invention can be applied to, but is not particularly limited to, textile products such as clothing, hair, skin, tableware, bathrooms, bathtubs, and the like. The cleaning composition of the present invention is preferably applied to textile products, and examples of textile products include, but are not limited to, shirts, trousers, underwear, handkerchiefs, futons, curtains, and the like. [Example]

[0061] The present invention will be explained in more detail below with reference to examples, but the scope of the present invention is not limited to the descriptions of these examples. In the examples, the amount of each component is expressed in mass %. Furthermore, a fatty acid having n carbon atoms will be abbreviated as Cn (for example, caprylic acid having 8 carbon atoms will be abbreviated as C8).

[0062] [Fat and oil refining] (Palm kernel olein) Palm kernel olein raw material was obtained by bleaching and deodorizing.

[0063] (coconut oil) The raw material of coconut oil was obtained by bleaching and deodorizing.

[0064] (MCT) It was obtained by purifying only medium-chain triacylglycerols from palm kernel oil or coconut oil.

[0065] (Palm oil) Palm oil raw material was obtained by bleaching and deodorizing.

[0066] (High oleic sunflower oil) The raw material of high oleic sunflower oil was obtained by bleaching and deodorizing.

[0067] (Super hydrogenated hyercin rapeseed oil) The raw material of extremely hardened hyercin rapeseed oil was obtained by bleaching and deodorizing.

[0068] (High Yercin rapeseed oil) The raw material of hyercin rapeseed oil was obtained by bleaching and deodorizing.

[0069] (castor oil) The raw castor oil was obtained by bleaching and deodorizing.

[0070] (corn oil) Corn oil raw material was obtained by bleaching and deodorizing.

[0071] (Rice bran fatty acids) It was obtained by refining fatty acids obtained from rice bran oil.

[0072] [Manufacturing method] 20 to 35 mass % of fats or fatty acids were mixed with 50 to 70 mass % of water, and then 10 to 20 mass % of potassium hydroxide was added to carry out saponification at a temperature of 100°C±4°C. Thereafter, the reaction product was diluted with water to prepare a cleaning composition for each example (here, the fatty acid potassium in the cleaning composition corresponds to the fatty acid soap in the present invention). The fats and oils or fatty acids used in each example are shown in Table 1.

[0073] Table 2 also shows the fatty acid composition of the fatty acid soap in the cleaning composition used in each example. Here, the fatty acid composition was measured in accordance with the Standard Method for Analysis of Fats and Oils (Internal 15-2003, Fatty Acid Composition (Capillary Gas Chromatography)). The gas chromatography apparatus used was a GC-2010 model manufactured by Shimadzu Corporation, and the column used was an SP-2560 manufactured by SUPELCO. Regarding the fatty acid composition of fatty acid soap, only the content of ricinoleic acid (C18-1+OH) was calculated using the literature value for the fatty acid composition of castor oil (ricinoleic acid content: 87.2%, source: Handbook of Oil and Fat Chemistry, Revised Third Edition).

[0074] [evaluation] The cleaning compositions obtained by the above-mentioned production methods were subjected to the tests shown in Table 2 to evaluate the properties of the cleaning compositions.

[0075] [Table 1]

[0076] [Table 2]

[0077] [Evaluation method] <Soap scum rating scale> 1.5±0.15 kg of black clothing and the cleaning composition obtained by the above-mentioned method were placed in a washing machine (Hitachi Beat Wash BW-DV80E) so that the soap content was 54.75 g per 38 L of water, and the clothing was washed using tap water (hardness: 65 to 75). Specifically, a cleaning composition with a soap content of 54.75 g, which is three times the recommended amount for laundry, was uniformly dispersed in 3 L of water to prevent variations in the evaluation of the clothes, and then the clothes were soaked in the water and placed in a washing machine. Then, the clothes were washed using 38 L of water, two rinses, and the delicate cycle. The washed clothes were then air-dried, and the next day, the degree of whitening on the clothes was visually evaluated by four evaluators who are experts in the manufacture of cleaning compositions. The degree of whitening was determined as a washing evaluation value and evaluated according to the following criteria. The evaluation criteria values were determined using Figure 1. A lower washing evaluation value indicates less soap scum adhesion to the clothes. (Evaluation criteria) ◎: 1 to 4 ○:5~6 ×:7~10

[0078] In the above test, the average of the evaluation results by four evaluators who are experts in the manufacture of cleaning compositions was calculated and used as the washing evaluation value.

[0079] [Cleaning power test] The soiled cloth used was a wet artificially soiled cloth (JIS standard, Laundry Science Association, Wet Artificially Soiled Cloth JISC9606). The cleaning liquid used was prepared by adding 100 mL of tap water to a 200 mL beaker, adding the cleaning composition obtained by the above-mentioned method to 1 L of water so that the pure soap content was 0.48 g, and stirring the mixture. The soiled cloth was placed in a beaker containing the cleaning solution and stirred for 10 minutes using a Three-One Motor (BL-3000 manufactured by HEIDON). After stirring was complete, the soiled cloth was removed from the cleaning solution, dehydrated for 1 minute, and then dried with an iron. The reflectance of each of the soiled cloths before washing, the soiled cloths after washing, and the reference cloth (here, the reference cloth refers to the clean cloth before the soiled cloth was artificially soiled) was measured using a color difference meter (manufactured by Konica Minolta), and the cleaning rate (%) was calculated using the formula shown below. Cleaning rate (%) = (reflectance of soiled cloth after cleaning - reflectance of soiled cloth before cleaning) / (reflectance of reference cloth - reflectance of soiled cloth before cleaning) x 100 The cleaning rate of the soiled cloth was determined and evaluated according to the following criteria. (Evaluation criteria) ◎: 15% or more 〇: 10% or more but less than 15% △: 5% or more but less than 10% ×: Less than 5%

[0080] [Oxidation stability (difficulty of oxidation)] In this specification, the following "oxidation difficulty" is used as an index of oxidation stability. The content of unsaturated fatty acids (oleic acid, linoleic acid, linolenic acid, etc.) in the fatty acid soap was multiplied by a specific coefficient (monounsaturated fatty acids: 0.89, diunsaturated fatty acids: 21, triunsaturated fatty acids: 39) and the sum of these values was determined as the degree of oxidation difficulty of the cleaning composition (Reference: Fukuzawa Kenji, Terao Junji, Experimental Methods for Lipid Peroxidation, Hirokawa Shoten). Example: 46.2% oleic acid, 8.7% linoleic acid, 0% linolenic acid. (Oxidation difficulty) = (0.89 x 46.2) + (21 x 8.7) + (39 x 0) = 224 Based on the oxidation difficulty obtained above, the oxidation stability was evaluated as follows. (Oxidation difficulty) ◎:~200 ○:201~400 △:401~600 ×:601~

[0081] [Consideration] As shown in Table 2, it was found that a detergent produced using a detergent composition in which the unsaturated fatty acid content in the fatty acid composition of the fatty acid soap is 22% by mass or more and the saturated fatty acid content with 12 or more carbon atoms is 65% by mass or less (hereinafter referred to as detergent composition A) can suppress the generation of soap scum. Furthermore, it was found that a detergent produced using detergent composition A (hereinafter referred to as detergent composition B) which further contains erucic acid in the fatty acid composition can further suppress the generation of soap scum.

[0082] Furthermore, a comparison of Examples 1 to 5 with Comparative Example 1 revealed that cleaning agents produced using cleaning composition A or B, which has a linoleic acid content of 3% by mass or more and 23% by mass or less in the fatty acid composition, can suppress the generation of soap scum and are less susceptible to oxidation.

[0083] Furthermore, it was found that cleaning agents produced using cleaning composition A or B, which contains linoleic acid and oleic acid as fatty acid components and has a mass ratio of linoleic acid to oleic acid of 1:1 to 1:6, can suppress the generation of soap scum.

[0084] It was also found that the detergent produced using cleaning composition A or B, in which the content of saturated fatty acids having 10 to 14 carbon atoms in the fatty acid composition is 60 mass % or less, can suppress the generation of soap scum. [Industrial Applicability]

[0085] The cleansing composition of the present invention can be used as a bath soap, a hair washing soap, a face washing soap, or a hand washing soap.

Claims

1. 1. A cleaning composition comprising a fatty acid soap, The fatty acid soap contains, as a fatty acid composition, an unsaturated fatty acid and a saturated fatty acid having 12 or more carbon atoms, In the fatty acid composition, the content of unsaturated fatty acids is 22% by mass or more, and the content of saturated fatty acids having 12 or more carbon atoms is 65% by mass or less; the unsaturated fatty acids include linoleic acid and oleic acid; The fatty acid composition has a linoleic acid content of 3% by mass or more and 20% by mass or less, and an oleic acid content of 25% by mass or more, It is in liquid form, A cleaning composition which is the following (A) and / or (B): (A) The fatty acid composition contains 8 to 10 carbon atoms in a saturated fatty acid content of 8% by mass or more. (B) The unsaturated fatty acid includes erucic acid.

2. A cleaning composition as described in claim 1, wherein the mass ratio of linoleic acid to oleic acid is 1:1 to 1:

4.

3. The linoleic acid content in the fatty acid composition is 7% by mass or more and 20% by mass or less, The cleaning composition according to claim 1 or 2, wherein the fatty acid composition has an oleic acid content of 25% by mass or more and 50% by mass or less.

4. A cleaning composition as described in claim 1 or 2, wherein the fatty acid composition contains an unsaturated fatty acid content of 22% by mass or more and 70% by mass or less, and an saturated fatty acid content of 12 or more carbon atoms of 40% by mass or less.

5. The unsaturated fatty acid includes erucic acid, The cleaning composition according to claim 1 or 2, wherein the fatty acid composition has an erucic acid content of 8% by mass or less.

6. The fatty acid soap contains, as a fatty acid composition, saturated fatty acids having 10 to 14 carbon atoms, 3. The cleaning composition according to claim 1, wherein the fatty acid composition contains 60% by mass or less of saturated fatty acids having 10 to 14 carbon atoms.

7. 3. The cleaning composition according to claim 1, which is substantially free of petroleum-based surfactants and / or chelating agents.

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