High-concentration neutral liquid detergent composition

Abstract

To provide a highly concentrated neutral liquid detergent composition which maintains suitable viscosity upon dilution with water while demonstrating superior low-temperature stability, washing ability, and foam retention.SOLUTION: A high-concentration neutral liquid detergent composition comprises: component (A) linear alkylbenzene sulfonic acid and / or a salt thereof; component (B) fatty acid alkanolamide; component (C) water-soluble salt; and component (D) an anionic surfactant other than component (A), wherein the total amount of component (A) and component (B) is 20 mass% or more and 55 mass% or less.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to a highly concentrated neutral liquid detergent composition. [Background technology]

[0002] As consumers become more environmentally conscious, the development and sale of environmentally friendly products are becoming increasingly important, and environmentally friendly products are also in demand in the field of detergents. Under these circumstances, efforts are being made to concentrate detergent compositions and reduce the size of containers containing them, in order to reduce waste from packaging containers and the like and to reduce energy consumption during transportation. Furthermore, since preventing overuse of detergents can reduce the burden on the environment, various detergents have been developed that have an appropriate viscosity when diluted with water at the time of use, and that exhibit a good viscosity that prevents the detergent from easily dripping when dispensed onto a cleaning tool such as a sponge.

[0003] As a conventional high-concentration detergent composition, Patent Document 1 discloses a concentrated liquid detergent characterized by having a first phase and a second phase that appear separated at 15°C, and when diluted with water to a predetermined ratio, the first and second phases become compatible and form a uniformly dispersed single-phase liquid. Patent Document 2 also describes a high-concentration neutral liquid detergent composition containing a total of 60 to 90 wt% of a linear alkylbenzenesulfonic acid ethanolamine salt and a fatty acid alkanolamide, with a viscosity reducer and viscosity modifier adjusted to achieve a suitable viscosity when diluted with water. Patent Document 3 also describes a liquid detergent containing 30 to 60 wt% of a surfactant, such as an anionic surfactant or an amine oxide surfactant, and achieving a suitable viscosity when diluted with water. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2014-108971 [Patent Document 2] Japanese Patent Application Publication No. 7-118695 [Patent Document 3] Japanese Patent Application Laid-Open No. 2002-256299 Summary of the Invention [Problem to be solved by the invention]

[0005] In Patent Document 1, the concentrated liquid detergent separates into two phases, a first phase and a second phase, which can lead to imbalance of the components when diluted with water for use, potentially resulting in insufficient cleaning performance. The high-concentration neutral liquid detergent composition in Patent Document 2 contains a high concentration of surfactants, with linear alkylbenzene sulfonate and fatty acid alkanolamide blended in amounts of 60 to 90% by mass, raising concerns about the composition's environmental impact. Furthermore, the cleaning performance, low-temperature stability, and foam persistence of the composition are unclear. Patent Document 3 maintains a moderate viscosity even when diluted with water, and is excellent in cleaning performance against grease and oils and low-temperature stability. However, the viscosity decreases as the dilution ratio increases, making the low-temperature stability of the diluted solution unclear.

[0006] The present invention has been discovered to solve the above-mentioned problems. That is, an object of the present invention is to provide a highly concentrated neutral liquid detergent composition that maintains an appropriate viscosity even when diluted with water, and has excellent low-temperature stability, detergency, and foam persistence. [Means for solving the problem]

[0007] In order to solve the above problems, the present inventors conducted extensive research and found that a composition containing a linear alkylbenzenesulfonic acid and / or a salt thereof as component (A), a fatty acid alkanolamide as component (B), a water-soluble salt as component (C), and an anionic surfactant other than (A) as component (D), wherein the total amount of components (A) and (B) is 20% by mass or more and 55% by mass or less, when used after dilution with water, has excellent low-temperature stability while maintaining an appropriate viscosity, and also has excellent cleansing properties and foam persistence, which led to the completion of the present invention.

[0008] That is, the present invention provides: (1) A highly concentrated neutral liquid detergent composition comprising a linear alkylbenzenesulfonic acid and / or a salt thereof as component (A), a fatty acid alkanolamide as component (B), a water-soluble salt as component (C), and an anionic surfactant other than (A) as component (D), wherein the total amount of components (A) and (B) is 20% by mass or more and 55% by mass or less. (2) The highly concentrated neutral liquid detergent composition according to (1), characterized in that the mass ratio (D) / (A) of the mass of the component (D) to the mass of the component (A) is 0.0020 or more and 0.70 or less. (3) A highly concentrated neutral liquid detergent composition according to (1) or (2), characterized in that it contains at least one selected from ammonium salts and alkanolamine salts as component (C). (4) The highly concentrated neutral liquid detergent composition according to claim 1 or 2, characterized in that it contains at least one selected from ammonium chloride, ammonium sulfate, diammonium hydrogen citrate, triammonium citrate, monoethanolamine hydrochloride, monoethanolamine sulfate, monoethanolamine citrate, diethanolamine hydrochloride, diethanolamine sulfate, diethanolamine citrate, triethanolamine hydrochloride, triethanolamine sulfate, and triethanolamine citrate. (5) A highly concentrated neutral liquid detergent composition according to (1) or (2), characterized in that it contains at least one selected from α-olefin sulfonates, polyoxyethylene alkyl ether sulfates, and alkanesulfonates as component (D). (6) A highly concentrated neutral liquid detergent composition according to (1) or (2), characterized in that it contains at least one selected from the group consisting of carboxylic acid-type amphoteric surfactants as component (F). (7) The highly concentrated neutral liquid detergent composition according to (1) or (2), characterized in that the mass ratio (F) / ((A)+(B)) of the mass of the (F) component to the total mass of the (A) component and the (B) component is 0.0030 or more and 0.50 or less. (8) A highly concentrated neutral liquid detergent composition according to (1) or (2), characterized in that it contains at least one solvent selected from alcohol-based solvents, glycol-based solvents, and urea as component (G). The summary is as follows. [Effects of the Invention]

[0009] The highly concentrated neutral liquid detergent composition of the present invention maintains an appropriate viscosity when diluted with water and is excellent in low temperature stability, detergency, and foam durability. DETAILED DESCRIPTION OF THE INVENTION

[0010] The high-concentration neutral liquid detergent composition of the present invention is characterized by containing linear alkylbenzenesulfonic acid and / or its salt as component (A), fatty acid alkanolamide as component (B), water-soluble salt as component (C), and an anionic surfactant other than (A) as component (D), and the total amount of components (A) and (B) is 20% by mass or more and 55% by mass or less.

[0011] (A) Linear alkylbenzene sulfonic acid and / or its salt The linear alkylbenzenesulfonic acid and / or its salt used in the present invention contributes to improved cleansing properties, foaming properties, and foam persistence, as well as maintaining an appropriate viscosity. The linear alkylbenzenesulfonic acid and / or its salt are not particularly limited, and any linear alkylbenzenesulfonic acid and / or its salt may be used alone or in combination. For example, the alkyl group of the linear alkylbenzenesulfonic acid may have 6 to 20 carbon atoms. More specifically, examples of the alkyl group include hexyl, heptyl, octyl, nonyl, decyl, undecyl, lauryl, tridecyl, myristyl, pentadecyl, hexadecyl, heptadecyl, stearyl, nonadecyl, and eicosyl groups. The linear alkylbenzenesulfonic acid and / or its salt are not particularly limited, but an alkyl group having 10 to 16 carbon atoms is preferred.

[0012] Linear alkylbenzenesulfonic acid and / or its salts are usually present in the form of a salt and are commercially available. Examples of linear alkylbenzenesulfonate salts include alkali metal salts, alkaline earth metal salts, and alkanolamine salts of linear alkylbenzenesulfonic acid, with alkali metal salts and alkanolamine salts being preferred. Examples of alkali metal salts include sodium salts and potassium salts. Examples of alkaline earth metal salts include magnesium salts. Examples of alkanolamine salts include monoethanolamine salts, diethanolamine salts, triethanolamine salts, monoisopropanolamine salts, 2-amino-2-methyl-1-propanol salts, and diisopropanolamine salts.

[0013] Specific examples of linear alkylbenzene sulfonates include sodium linear alkylbenzene sulfonate, potassium linear alkylbenzene sulfonate, monoethanolamine linear alkylbenzene sulfonate, diethanolamine linear alkylbenzene sulfonate, and triethanolamine linear alkylbenzene sulfonate. Among these, from the viewpoints of foaming ability, foam persistence, viscosity of the diluted solution, storage stability, and low-temperature stability of the undiluted solution and / or diluted solution, potassium linear alkylbenzene sulfonate, monoethanolamine linear alkylbenzene sulfonate, and triethanolamine linear alkylbenzene sulfonate are preferred, and monoethanolamine linear alkylbenzene sulfonate is more preferred. These linear alkylbenzene sulfonate salts may be used alone or in combination of two or more.

[0014] The content of component (A) in the high-concentration neutral liquid detergent composition of the present invention is not particularly limited, but is preferably 15% by mass or more and 50% by mass or less, more preferably 18% by mass or more and 40% by mass or less, and even more preferably 20% by mass or more and 35% by mass or less, based on the total amount of the high-concentration neutral liquid detergent composition of the present invention, from the viewpoints of detergency, foaming ability, foam persistence, viscosity of the concentrate and / or diluted solution, storage stability, and low-temperature stability of the concentrate and / or diluted solution. A content of component (A) of 15% by mass or more ensures that the desired detergency, foaming ability, foam persistence, and viscosity of the concentrate and / or diluted solution are sufficiently obtained. A content of component (A) of 50% by mass or less significantly increases the viscosity of the concentrate and / or diluted solution, while still achieving the desired effect commensurate with the amount added, thereby more reliably preventing a decrease in water solubility, handleability, storage stability, and low-temperature stability of the concentrate and / or diluted solution.

[0015] (B) Fatty acid alkanolamide The fatty acid alkanolamide used in the present invention contributes to improving cleansing properties, foaming properties, and foam persistence, as well as maintaining an appropriate viscosity of the concentrate and / or diluted solution. The fatty acid alkanolamide used in the present invention is not particularly limited, and any fatty acid alkanolamide can be used alone or in combination of two or more. The fatty acid alkanolamide is an amide compound obtained by condensing a fatty acid with a monoalkanolamine or dialkanolamine. Examples of fatty acids constituting the fatty acid alkanolamide include saturated or unsaturated fatty acids having 8 to 22 carbon atoms, such as caprylic acid (C8), pelargonic acid (C9), capric acid (C10), undecylic acid (C11), lauric acid (C12), tridecylic acid (C13), myristic acid (C14), pentadecylic acid (C15), palmitic acid (C16), margaric acid (C17), stearic acid (C18), nonadecylic acid (C19), and methylparaben. Examples of saturated fatty acids include saturated fatty acids such as myristoleic acid (C14), palmitoleic acid (C16), oleic acid (C18), vaccenic acid (C18), linoleic acid (C18), (9,12,15)-linolenic acid (C18), (6,9,12)-linolenic acid (C18), eleostearic acid (C18), 8,11-eicosadienoic acid (C20), mead acid (C20), and arachidonic acid (C20). Fatty acids derived from vegetable or animal fats and oils may also be used. In this case, the fatty acid alkanolamide is usually a mixture of alkanolamides of multiple fatty acids. The plant-derived fats and oils are not particularly limited, but examples thereof include coconut oil, palm oil, palm kernel oil, safflower oil, grape oil, soybean oil, sunflower oil, corn oil, cottonseed oil, sesame oil, corn oil, olive oil, rapeseed oil, rice bran oil, peanut oil, olive oil, castor oil, etc. The animal-derived fats and oils include terrestrial animal fats and oils such as beef tallow, lard, mutton tallow, and beef leg oil.

[0016] Examples of alkanols constituting the fatty acid alkanolamide include alkylene glycols having 2 to 10 carbon atoms, preferably 2 to 4 carbon atoms, such as ethylene glycol, propylene glycol, tetramethylene glycol, pentamethylene glycol, and hexamethylene glycol. In addition to alkylene glycol, polyether polyols such as polyethylene glycol, polyoxypropylene glycol, polyhexamethylene ether glycol, and polytetramethylene ether glycol (PTMG) may be bonded to the amide group of the fatty acid alkanolamide. Examples of alkanolamines constituting fatty acid alkanolamides include monoethanolamine, diethanolamine, and monoisopropanolamine. These alkanolamines can be easily synthesized by reacting ammonia with ethylene oxide or propylene oxide. Alternatively, alkylene oxide may be added to the fatty acid alkanolamide.

[0017] Specific examples of fatty acid alkanolamides include those obtained by adding alkylene oxide to the above fatty acid alkanolamides, such as lauric acid diethanolamide, lauric acid diethanolamide, lauric myristic acid diethanolamide, myristic acid diethanolamide, stearic acid diethanolamide, oleic acid diethanolamide, coconut oil fatty acid diethanolamide, palm kernel oil fatty acid diethanolamide, tallow fatty acid diethanolamide, lauric acid monoethanolamide, myristic acid monoethanolamide, stearic acid monoethanolamide, oleic acid monoethanolamide, coconut oil fatty acid monoethanolamide, palm kernel oil fatty acid monoethanolamide, polyoxyethylene lauric acid monoethanolamide, polyoxyethylene coconut oil fatty acid monoethanolamide, lauric acid monoisopropanolamide, and polyoxypropylene coconut oil fatty acid monoisopropanolamide. Among these, lauric acid diethanolamide, lauric acid diethanolamide, lauric myristic acid diethanolamide, myristic acid diethanolamide, stearic acid diethanolamide, oleic acid diethanolamide, coconut oil fatty acid diethanolamide, palm kernel oil fatty acid diethanolamide, and beef tallow fatty acid diethanolamide are preferred, with coconut oil fatty acid diethanolamide and palm kernel oil fatty acid diethanolamide being more preferred. These fatty acid alkanolamides may be used alone or in combination of two or more.

[0018] More specifically, examples of lauric acid diethanolamide include Stahome DL from NOF Corporation, lauric myristic acid diethanolamide including Amizol LMDE-Y from Kawaken Fine Chemicals Co., Ltd., stearic acid diethanolamide including Amizol SDE and Amizol SDHE from Kawaken Fine Chemicals Co., Ltd., oleic acid diethanolamide including Stahome DO and Stahome DOS from NOF Corporation, coconut oil fatty acid diethanolamide including CDE80-300 from WOODLAND FOOD INDUSTIRIES Pte. Ltd, palm kernel oil fatty acid diethanolamide including KDE800-300 from WOODLAND FOOD INDUSTIRIES Pte. Ltd, and beef tallow fatty acid diethanolamide including Stahome T from NOF Corporation.

[0019] The content of component (B) used in the present invention is preferably 5.0% by mass or more and 25% by mass or less, more preferably 8.0% by mass or more and 20% by mass or less, and even more preferably 10% by mass or more and 18% by mass or less, based on the total amount of the high-concentration neutral liquid detergent composition of the present invention, from the viewpoints of detergency, foaming ability, foam persistence, viscosity of the concentrate and / or diluted solution, storage stability, and low-temperature stability of the concentrate and / or diluted solution. A content of 5.0% by mass or more can more reliably achieve the desired detergency, foaming ability, foam persistence, and viscosity of the concentrate and diluted solution. A content of 25% by mass or less can more reliably prevent excessively high viscosity of the concentrate and / or diluted solution of the high-concentration neutral liquid detergent composition, which would otherwise result in deterioration of solubility in water, handleability, storage stability, and low-temperature stability of the concentrate and / or diluted solution.

[0020] In the high-concentration neutral liquid detergent composition of the present invention, the total mass of component (A) and component (B) must be 20% by mass or more and 55% by mass or less. This value is preferably 20% by mass or more and 55% by mass or less, more preferably 25% by mass or more and 50% by mass or less, even more preferably 30% by mass or more and 50% by mass or less, and particularly preferably 30% by mass or more and 45% by mass or less. By having this value within the above range, good detergency, foaming ability, foam persistence, and appropriate viscosity can all be achieved.

[0021] In the highly concentrated neutral liquid detergent composition of the present invention, the mass ratio (A) / (B) of the mass of component (A) to the mass of component (B) is not particularly limited, but is, for example, 0.60 to 10. This value is preferably 0.60 to 10, more preferably 0.70 to 8.0, and even more preferably 0.80 to 7.0. By keeping this value within the above range, good foaming properties, foam persistence, and appropriate viscosity can all be achieved.

[0022] (C) Water-soluble salt The water-soluble salt used in the present invention contributes to maintaining the viscosity of the high-concentration neutral liquid detergent composition when diluted with water and to improving the low-temperature stability of the undiluted solution. The water-soluble salt is not particularly limited, and examples thereof include alkali metal salts, alkaline earth metal salts, ammonium salts, and alkanolamine salts of organic or inorganic acids, which can be used singly or in combination of two or more.

[0023] The organic acid is not particularly limited, but examples thereof include formic acid, acetic acid, citric acid, succinic acid, oxalic acid, etc. The inorganic acid includes sulfuric acid, hydrochloric acid, phosphoric acid, carbonic acid, boric acid, etc. The phosphoric acid includes, for example, orthophosphoric acid, metaphosphoric acid, hypophosphoric acid, phosphorous acid, hypophosphorous acid, pyrophosphoric acid, trimetaphosphoric acid, tetrametaphosphoric acid, pyrophosphorous acid, etc. Examples of the alkali metal element in the alkali metal salt include sodium and potassium. Examples of the alkaline earth metal element in the alkaline earth metal salt include magnesium and calcium. Examples of the alkanolamine include, but are not limited to, methanolamine, monoethanolamine, diethanolamine, triethanolamine, monoisopropanolamine, 2-amino-2-methyl-1-propanol, diisopropanolamine, and triisopropanolamine.

[0024] Specific examples of alkali metal salts include sodium chloride, potassium chloride, sodium sulfate, potassium sulfate, sodium carbonate, potassium carbonate, sodium bicarbonate, potassium bicarbonate, sodium sesquicarbonate, potassium sesquicarbonate, sodium acetate, potassium acetate, disodium hydrogen citrate, dipotassium hydrogen citrate, trisodium citrate, tripotassium citrate, sodium borate, potassium borate, sodium phosphate, potassium phosphate, sodium dihydrogen phosphate, potassium dihydrogen phosphate, disodium hydrogen phosphate, dipotassium hydrogen phosphate, etc. Examples of alkaline earth metal salts include magnesium chloride, calcium chloride, magnesium sulfate, calcium sulfate, magnesium carbonate, calcium carbonate, magnesium acetate, calcium acetate, magnesium citrate, calcium citrate, magnesium borate, calcium borate, magnesium phosphate, calcium phosphate, etc. Examples of ammonium salts include ammonium chloride, ammonium sulfate, ammonium bicarbonate, ammonium acetate, diammonium hydrogen citrate, triammonium citrate, ammonium borate, ammonium dihydrogen phosphate, etc. Examples of alkanolamine salts include monoethanolamine hydrochloride, monoethanolamine sulfate, monoethanolamine acetate, monoethanolamine citrate, diethanolamine hydrochloride, diethanolamine sulfate, diethanolamine acetate, diethanolamine citrate, triethanolamine hydrochloride, triethanolamine sulfate, triethanolamine acetate, and triethanolamine citrate.Among these, ammonium salts and alkanolamine salts are preferred, and ammonium chloride, ammonium sulfate, ammonium hydrogen carbonate, ammonium acetate, diammonium hydrogen citrate, triammonium citrate, monoethanolamine hydrochloride, monoethanolamine sulfate, monoethanolamine acetate, monoethanolamine citrate, diethanolamine hydrochloride, diethanolamine sulfate, diethanolamine acetate, diethanolamine citrate, triethanolamine hydrochloride, triethanolamine sulfate, triethanolamine acetate, and triethanolamine citrate are more preferred, and ammonium chloride, ammonium sulfate, diammonium hydrogen citrate, triammonium citrate, monoethanolamine hydrochloride, monoethanolamine sulfate, monoethanolamine citrate, diethanolamine hydrochloride, diethanolamine sulfate, diethanolamine citrate, triethanolamine hydrochloride, triethanolamine sulfate, and triethanolamine citrate are even more preferred, and ammonium chloride, ammonium sulfate, diammonium hydrogen citrate, triammonium citrate, monoethanolamine hydrochloride, monoethanolamine sulfate, diethanolamine hydrochloride, diethanolamine sulfate, triethanolamine hydrochloride, and triethanolamine sulfate are particularly preferred. From the viewpoint of maintaining an appropriate viscosity or achieving better low-temperature stability of the concentrate, it is preferable to include ammonium salts of organic acids such as diammonium hydrogen citrate, ammonium salts of inorganic acids such as ammonium chloride and ammonium sulfate, monoethanolamine salts of organic acids such as monoethanolamine citrate, and monoethanolamine salts of inorganic acids such as monoethanolamine hydrochloride and monoethanol sulfate. These water-soluble salts may be used alone or in combination of two or more.

[0025] From the viewpoint of maintaining an appropriate viscosity of the diluted solution and low-temperature stability, the content of component (C) used in the present invention is preferably 0.30% by mass or more and 10% by mass or less, more preferably 1.0% by mass or more and 9% by mass or less, and even more preferably 2.0% by mass or more and 8.0% by mass or less, based on the total amount of the high-concentration neutral liquid detergent composition of the present invention. A content of 0.30% by mass or more can more reliably ensure sufficient viscosity of the diluted solution, while a content of 10% by mass or less can more reliably prevent excessively high viscosity of the diluted solution of the high-concentration neutral liquid detergent composition, which can lead to deterioration in solubility in water, handleability, and low-temperature stability of the undiluted solution and / or diluted solution.

[0026] (D) Anionic surfactant other than component (A) The anionic surfactant (component (D)) other than component (A) used in the present invention contributes to improving foaming properties and foam persistence, and maintaining the appropriate viscosity of the dilution solution. The anionic surfactant other than component (A) used in the present invention is not particularly limited as long as it achieves the effects of the present invention. Examples include fatty acids, alkenyl succinic acids, polyoxyalkylene alkyl or alkenyl ether carboxylic acids, alkylol sarcosines, alkyl or alkenyl sulfates, polyoxyalkylene alkyl ether sulfates, polyoxyalkylene alkenyl ether sulfates, amide ether sulfates, olefin sulfonic acids, alkanesulfonic acids, alkyl diphenyl ether disulfonic acids, dialkyl sulfosuccinic acids, polyoxyalkylene alkyl ether sulfosuccinates, acyltauric acids, alkyl monophosphates, alkyl triphosphates, polyoxyalkylene alkyl ether phosphates, dipolyoxyalkylene alkyl ether phosphates, tripolyoxyalkylene alkyl ether phosphates, tripolyoxyalkylene alkyl ether phosphates, and alkali metal and ammonium salts thereof. Among these, olefin sulfonic acid or a salt thereof, polyoxyethylene alkyl ether sulfuric acid or a salt thereof, and alkanesulfonic acid or a salt thereof are preferred, and α-olefin sulfonic acid or a salt thereof is more preferred. These anionic surfactants may be used alone or in combination of two or more.

[0027] The anionic surfactant is not particularly limited, but preferably has an alkyl group having 8 to 20 carbon atoms or an alkenyl group having 8 to 20 carbon atoms. The alkyl group or alkenyl group may be linear or branched.

[0028] When the anionic surfactant is in the form of a salt, it can be, for example, an alkali metal salt, an alkaline earth metal salt, an alkanolamine salt, or the like. Examples of alkali metal salts include sodium salts and potassium salts. Examples of alkaline earth metal salts include magnesium salts. Examples of alkanolamine salts include monoethanolamine salts, diethanolamine salts, triethanolamine salts, monoisopropanolamine salts, 2-amino-2-methyl-1-propanol salts, and diisopropanolamine salts.

[0029] The alkyl group of the alkyl sulfate salt is preferably an alkyl group having 8 to 18 carbon atoms. Examples of alkyl sulfate salts include sodium lauryl sulfate, triethanolamine lauryl sulfate, sodium myristyl sulfate, and sodium cetyl sulfate. The alkyl group of the polyoxyalkylene alkyl ether sulfate salt is preferably an alkyl group having 10 to 18 carbon atoms. The polyoxyalkylene alkyl ether sulfate salt has an oxyethylene group and / or an oxypropylene group, and the average number of repetitions of the oxyethylene group, n, is preferably 1 to 20, more preferably 1 to 15, and even more preferably 1 to 5, and the average number of repetitions of the oxypropionic group, m, is preferably 0 to 1. Examples of polyoxyalkylene alkyl ether sulfate salts include sodium polyoxyethylene lauryl ether sulfate, polyoxyethylene lauryl ether sulfate triethanolamine, sodium polyoxyethylene alkyl (C12, C13) ether sulfate, sodium polyoxyethylene alkyl (C12, C14) ether sulfate, and sodium polyoxyethylene alkyl (C10 to C18) ether sulfate.

[0030] More specifically, examples of sodium polyoxyethylene lauryl ether sulfate include Teikapol NE7030 manufactured by Teika Corporation, polyoxyethylene lauryl ether sulfate triethanolamine manufactured by Kao Corporation, Emal 20T manufactured by Kao Corporation, sodium polyoxyethylene alkyl (C12, C13) ether sulfate manufactured by Kao Corporation, Persoft EF manufactured by NOF Corporation as sodium polyoxyethylene alkyl (C12, C14) ether sulfate, and Persoft EK and Persoft EL manufactured by NOF Corporation as sodium polyoxyethylene alkyl (C10-C18) ether sulfate.

[0031] The alkenyl group of the α-olefin sulfonic acid or a salt thereof is not particularly limited, but preferably has a carbon number of 8 to 20. Examples include sodium tetradecene sulfonate and sodium α-olefin sulfonate having a carbon number of 14 to 16.

[0032] More specifically, an example of sodium α-olefin sulfonate having 14 to 16 carbon atoms is HOSTAPUR OS Liq manufactured by Clariant Japan K.K.

[0033] Although the alkane sulfonic acid or its salt and the secondary alkane sulfonic acid or its salt are not particularly limited, it is preferable to use an alkane sulfonate having 10 to 18 carbon atoms. Examples include sodium secondary alkane (C10-18) sulfonate, sodium secondary alkane (C14-C17) sulfonate, and sodium alkane (C10-18) sulfonate.

[0034] More specifically, examples of secondary alkane (C10-18) sodium sulfonates include the HOSTAPUR SAS series from Clariant Japan Co., Ltd., and examples of alkane (C10-18) sodium sulfonates include LATEMURU PS from Kao Corporation.

[0035] The alkyl group of the alkyl diphenyl ether sulfonate is preferably an alkyl group having a carbon number of 8 to 18. Examples of the alkyl diphenyl ether sulfonate include sodium alkyl (C12) diphenyl ether sulfonate.

[0036] More specifically, examples of sodium alkyl (C12) diphenyl ether sulfonate include Pelex SS-H and Pelex SS-L manufactured by Miyoshi Oil & Fats Co., Ltd.

[0037] The sulfosuccinate is an alkyl succinate having a sulfo group, and the number of carbon atoms in the alkyl group is preferably 6 to 18. Specific examples of the sulfosuccinate include dioctyl sodium sulfosuccinate, didecyl sodium sulfosuccinate, didodecyl sodium sulfosuccinate, and di-2-ethylhexyl sodium sulfosuccinate.

[0038] More specifically, examples of dioctyl sodium sulfosuccinate include Perex OT-P, and examples of di-2-ethylhexyl sodium sulfosuccinate include Reparl 860K and Reparl 870P.

[0039] From the viewpoints of cleaning performance, foaming ability, foam persistence, and viscosity of the diluted solution, the amount of component (D) used in the present invention is preferably 0.10% by mass or more and 10% by mass or less, more preferably 0.30% by mass or more and 8.0% by mass or less, even more preferably 0.30% by mass or more and 7.0% by mass or less, and particularly preferably 0.50% by mass or more and 7.0% by mass or less, based on the total amount of the high-concentration neutral liquid detergent composition of the present invention. When the amount is 0.10% by mass or more, good cleaning performance, foaming ability, and foam persistence can be more reliably and sufficiently improved, and when the amount is 10% by mass or less, addition of an excessive amount of component (D) that is not commensurate with the effect can be prevented, and a decrease in the viscosity of the diluted solution can be more reliably prevented.

[0040] In the highly concentrated neutral liquid detergent composition of the present invention, the mass ratio (D) / (A) of the mass of component (D) to the mass of component (A) is not particularly limited, but can be, for example, 0.0020 to 0.70. This value is preferably 0.0020 to 0.70, more preferably 0.0020 to 0.60, even more preferably 0.010 to 0.40, and particularly preferably 0.010 to 0.30. By keeping this value within the above range, good detergency, foaming ability, foam persistence, and appropriate viscosity can all be achieved.

[0041] The highly concentrated neutral liquid detergent composition of the present invention contains water as component (E). Examples of water that can be used include tap water, softened water, purified water, RO water, ion-exchanged water, and distilled water. Examples of tap water include tap water from Arakawa Ward, Tokyo (pH = 7.6, total alkalinity (calcium carbonate equivalent) 40.5 mg / L, German hardness 2.3°DH (including calcium hardness 1.7°DH and magnesium hardness 0.6°DH), chloride ions 21.9 mg / L, sodium and its compounds 15 mg / L, nitrate nitrogen and nitrite nitrogen 1.2 mg / L, fluorine and its compounds 0.1 mg / L, boron and its compounds 0.04 mg / L, total trihalomethanes 0.016 mg / L, residual chlorine 0.4 mg / L, and organic matter (total organic carbon) 0.7 mg / L). The water (E) of the present invention is the balance relative to the total amount of the components (A) to (D) or the balance relative to the total amount of the components (A) to (D) and other optional components.

[0042] The highly concentrated neutral liquid detergent composition of the present invention may contain a carboxylic acid amphoteric surfactant as component (F). The carboxylic acid amphoteric surfactant contributes to improving cleaning performance, foaming properties, and foam persistence, and maintaining an appropriate viscosity of the diluted solution. Examples of such surfactants include alkyldimethylaminoacetic acid betaine, alkylamidopropyl betaine, alkyldimethylamino sulfobetaine, alkylamino (mono- or di-)propionate, alkylamino diacetate, alkylimidazolinium betaine, alkylaminoethylglycine, alkyldiaminoethylglycine, glycine n-(3-aminopropyl) C10-16 derivative, alkylpolyaminoethylglycine, alkyl β-alanine, and alkylaspartic acid or a salt thereof. The carboxylic acid amphoteric surfactant is not particularly limited, but preferably has an alkyl group having 8 to 18 carbon atoms. The alkyl group may be linear or branched. Among these, carboxylic acid type amphoteric surfactants are preferred, betaine type amphoteric surfactants and amino acid type surfactants are preferred, alkyldimethylaminoacetic acid betaine, alkylamidopropyl betaine and alkylamino (mono- or di-)propionate are more preferred, and alkylamidopropyl betaine is even more preferred. These carboxylic acid type amphoteric surfactants may be used alone or in combination of two or more.

[0043] The number of carbon atoms in the alkyl group of the alkyl dimethylaminoacetic acid betaine is not particularly limited, but is preferably 8 or more and 18 or less. More specific examples of the alkyl dimethylaminoacetic acid betaine include lauryl dimethylaminoacetic acid betaine, myristyl dimethylaminoacetic acid betaine, and stearyl dimethylaminoacetic acid betaine. Examples of the alkylamidopropyl betaine include coconut oil fatty acid amidopropyl betaine, palm oil fatty acid amidopropyl betaine, lauric acid amidopropyl betaine, myristic acid amidopropyl betaine, and ricinoleic acid amidopropyl betaine. Examples of the alkylimidazolinium betaine include 2-alkyl-N-carboxymethyl-N-hydroxyethylimidazolinium betaine, 2-alkyl-N-carboxyethyl-N-hydroxyethylimidazolinium betaine, and the like.

[0044] More specifically, lauryl dimethylaminoacetic acid betaine is available in IMEX DLB 35 from InterMed Manufacturing Sdn. Bhd., myristyl dimethylaminoacetic acid betaine is available in Rikabion A-200 from New Japan Chemical Co., Ltd., stearyl dimethylaminoacetic acid betaine is available in Anhithol 86B from Kao Corporation, palm oil fatty acid amidopropyl betaine is available in Rikabion B-200 from New Japan Chemical Co., Ltd., palm oil fatty acid amidopropyl betaine is available in Nissan Anon BDC-SF from NOF Corporation, and lauric acid amidopropyl betaine is available in IMEX LB from InterMed Manufacturing Sdn. Bhd. Examples of suitable products include Levon MY-30W (Sanyo Chemical Industries, Ltd.) as myristate amidopropyl betaine, Softazoline CH (Kawaken Fine Chemicals Co., Ltd.) as 2-alkyl-N-carboxymethyl-N-hydroxyethyl imidazolinium betaine, and Energy Coal CNS (Lion Specialty Chemicals Co., Ltd.) as 2-alkyl-N-carboxyethyl-N-hydroxyethyl imidazolinium betaine.

[0045] Examples of the alkylamino (mono- or di-)propionate, alkylaminoethylglycine, alkyldiaminoethylglycine, alkylaspartic acid or a salt thereof include dodecyldiaminoethylglycine, tetradecyldiaminoethylglycine, dodecyldiaminoethylglycine chloride, tetradecyldiaminoethylglycine chloride, sodium laurylaminopropionate, sodium laurylaminodipropionate, lauryl, lauryl aspartic acid, potassium lauryl aspartate, myristyl aspartic acid, potassium myristyl aspartate, etc.

[0046] More specifically, examples include Levon S, a product of Sanyo Chemical Industries, Ltd., as dodecyldiaminoethylglycine; Levon T-2, a product of Sanyo Chemical Industries, Ltd., as dodecyldiaminoethylglycine chloride; Levon APL, a product of Sanyo Chemical Industries, Ltd., as sodium laurylaminopropionate; Energy Coal DP-30, a product of Lion Specialty Chemicals Corporation, as sodium laurylaminodipropionate; and Njevon ASP-12KL, a product of New Japan Chemical Co., Ltd., as potassium lauryl aspartate.

[0047] When component (F) is used in the present invention, from the viewpoints of detergency, foaming ability, foam persistence, viscosity of the diluted solution, and storage stability, the content of component (F) is preferably 0.10% by mass or more and 10% by mass or less, more preferably 0.3% by mass or more and 7.0% by mass or less, even more preferably 0.50% by mass or more and 6.0% by mass or less, and particularly preferably 0.50% by mass or more and 5.0% by mass or less, relative to the total amount of the high-concentration neutral liquid detergent composition of the present invention. When the content is 0.10% by mass or more, good detergency, foaming ability, foam persistence, and sufficient viscosity of the diluted solution can be more reliably obtained, while when the content is 10% by mass or less, an excessively high viscosity of the diluted solution of the high-concentration neutral liquid detergent composition can be more reliably prevented, which would result in a decrease in solubility in water, handleability, and low-temperature stability.

[0048] In the highly concentrated neutral liquid detergent composition of the present invention, the mass ratio (F) / ((A)+(B)) of the mass of component (F) to the total mass of components (A) and (B) is not particularly limited, but can be, for example, 0.0030 or more and 0.50 or less. This value is preferably 0.005 or more and 0.30 or less, and more preferably 0.01 or more and 0.20 or less. When this value falls within the above range, good detergency, foaming ability, foam persistence, and appropriate viscosity of the dilution solution can all be achieved.

[0049] The high-concentration neutral liquid detergent composition of the present invention may contain an alcohol-based solvent, a glycol-based solvent, or urea as component (G). Component (G) contributes to improving the storage stability of the concentrate and the low-temperature stability of the concentrate and / or diluted solution. Examples of the alcohol-based solvent include methanol, ethanol, 1-propanol, 2-propanol, 1-butanol, 2-butanol, 2-methoxyethanol, 2-ethoxyethanol, 2-ethylhexanol, 3-methoxy-3-methyl-1-butanol, benzyl alcohol, and phenoxyethanol. Examples of the glycol-based solvent include ethylene glycol, diethylene glycol, triethylene glycol, polyethylene glycol, propylene glycol, dipropylene glycol, tripropylene glycol, polypropylene glycol, isoprene glycol, 1,2-butylene glycol, 1,3-butylene glycol, 1,2-pentylene glycol, and hexylene glycol. These may be used alone or in combination. Among these, ethanol, 1-propanol, 2-propanol, 1-butanol, 2-butanol, 2-methoxyethanol, 2-ethoxyethanol, ethylene glycol, diethylene glycol, triethylene glycol, polyethylene glycol, propylene glycol, isoprene glycol, and urea are preferred, ethanol, diethylene glycol monobutyl ether, polyethylene glycol, propylene glycol, and urea are more preferred, and ethanol, polyethylene glycol, propylene glycol, and urea are even more preferred.

[0050] From the viewpoints of storage stability of the concentrate, low-temperature stability of the concentrate and / or diluted solution, and viscosity of the diluted solution, the amount of component (G) used in the present invention is preferably 1.0% by mass or more and 30% by mass or less, more preferably 3.0% by mass or more and 25% by mass or less, even more preferably 5.0% by mass or more and 20% by mass or less, and particularly preferably 10% by mass or more and 20% by mass or less, based on the total amount of the high-concentration neutral liquid detergent composition of the present invention. A content of 1.0% by mass or more can more reliably achieve sufficient storage stability and low-temperature stability of the concentrate and / or diluted solution, while a content of 30% by mass or less can more reliably prevent cases where the concentrate and / or diluted solution cannot achieve an appropriate viscosity or where storage stability deteriorates.

[0051] The high-concentration neutral liquid detergent composition of the present invention may further contain pH adjusters, chelating agents, preservatives, food colorings, fragrances, metal corrosion inhibitors, natural extracts, thickeners, enzymes, etc., as necessary.

[0052] The pH of the highly concentrated neutral liquid detergent composition of the present invention is not particularly limited, but is, for example, 6 to 8 at 25°C. A pH of 6 or higher ensures sufficient storage stability of the concentrate, while a pH of 8 or lower ensures good hand roughness prevention. When the pH at 25°C is less than 6, for example, sodium hydroxide, potassium hydroxide, sodium acetate, sodium carbonate, monoethanolamine, diethanolamine, triethanolamine, etc. are used. When the pH is greater than 8, sulfuric acid, hydrochloric acid, nitric acid, methanesulfonic acid, sulfamic acid, citric acid, acetic acid, etc. are used. However, the pH adjuster used in the present application does not include component (C). These may be used alone or in combination of two or more. The pH values ​​above were measured using the method described in the Examples below.

[0053] Examples of chelating agents include nitrilotriacetic acid or a salt thereof, ethylenediaminetetraacetic acid or a salt thereof, hydroxyethylenediaminetriacetic acid or a salt thereof, diethylenetriaminopentaacetic acid or a salt thereof, triethylenetetraaminehexaacetic acid or a salt thereof, hydroxyethyliminodiacetic acid or a salt thereof, dihydroxyethylglycine or a salt thereof, methylglycinediacetic acid or a salt thereof, glutamic acid diacetic acid or a salt thereof, aspartic acid diacetic acid or a salt thereof, β-alaninediacetic acid or a salt thereof, tripolyphosphate or a salt thereof, etc. Examples of salts of the above chelating agents include alkali metal salts such as sodium salts and potassium salts, and these may be used alone or in combination of two or more.

[0054] Examples of preservatives include sodium hypochlorite, potassium hypochlorite, hydrogen peroxide, ε-polylysine, poly-γ-glutamic acid, nisin, CMIT (5-chloro-2-methyl-4-isothiazolin-3-one), MIT (2-methyl-4-isothiazolin-3-one), BIT (1,2-benzisothiazolin-3-one), BBIT (Nn-butyl-benzisothiazolin-3-one), and OIT (2-n-octyl-4-isothiazolin-3-one).

[0055] Examples of food dyes include Food Red No. 2 (Amaranth), Food Red No. 3 (Erythrosine), Food Red No. 40 (Allura Red AC), Food Red No. 102 (New Coccine), Food Red No. 104 (Phloxine), Food Red No. 105 (Rose Bengal), Food Red No. 106 (Acid Red), Food Yellow No. 4 (Tartrazine), Food Yellow No. 5 (Sunset Yellow FCF), Food Blue No. 1 (Brilliant Blue FCF), and Food Blue No. 2 (Indigo Carmine).

[0056] Examples of fragrances include natural fragrances, synthetic fragrances, and blends thereof. Examples of metal corrosion inhibitors include polycarboxylic acids such as short-chain dicarboxylic acids or tricarboxylic acids, phosphate esters, triazoles such as benzotriazole, tolyltriazole, or mercaptobenzothiazole, phosphonic acids such as 1-hydroxyethylidene-1,1-diphosphonic acid, adipic acid, glutaric acid, or succinic acid. Examples of natural extracts include natural extracts derived from plants such as Cannabaceae, Rubiaceae, Cruciferae, Gramineae, Ebenaceae, Asteraceae, Lamiaceae, Zingiberaceae, Theaceae, Solanaceae, Cupressaceae, Myrtaceae, Vitaceae, Legumes, Rutaceae, and Liliaceae, as well as natural extracts derived from animals such as lysozyme and milt protein extract. Examples of thickeners include carrageenan, xanthan gum, guar gum, locust bean gum, ghatti gum, karaya gum, pectin, etc. Examples of enzymes include lipase, alkaline amylase, amylase, cellulase, protease, pullulanase, etc.

[0057] The viscosity of the high-concentration neutral liquid detergent composition of the present invention is not particularly limited, but is preferably 70 to 300 mPa·s, more preferably 80 to 250 mPa·s, and particularly preferably 90 to 230 mPa·s when the temperature of the detergent composition is 25°C. A viscosity of 70 mPa·s or higher can prevent excessive dispensing of the high-concentration neutral liquid detergent composition when transferring it from a container to a sponge, thereby making it more economical to use. A viscosity of 300 mPa·s or lower can eliminate the time required for dissolution in water, allowing for uniform dissolution to achieve good cleaning properties, and also ensures sufficient handling during transfer. The viscosity was measured using the method described in the Examples below.

[0058] The viscosity of the highly concentrated neutral liquid detergent composition of the present invention when diluted with water (for example, when diluted 6-fold or 8-fold) is not particularly limited, but is preferably 70 to 500 mPa·s, more preferably 80 to 450 mPa·s, and particularly preferably 90 to 400 mPa·s when the temperature of the detergent composition is 25°C. A viscosity of 70 mPa·s or higher can prevent excessive discharge of the diluted solution when dispensed from a container onto a sponge. Furthermore, excessive use due to the spillage of the diluted solution when kneading the sponge to create lather can be prevented, allowing for economical use. A viscosity of 500 mPa·s or lower can ensure sufficient handling when dispensed from a container onto a sponge. The viscosity was measured using the method described in the Examples below.

[0059] The highly concentrated neutral liquid detergent composition of the present invention is not only suitable for cleaning foods such as vegetables and fruits, but also for hand-washing hard surfaces, particularly for cleaning tableware and cooking utensils, in kitchens of hotels, restaurants, eating and drinking establishments, school cafeterias, employee cafeterias, food processing factory workshops, and ordinary household kitchens. Cleaning is typically carried out by preparing an aqueous detergent solution in a sink or the like by diluting the undiluted solution 3,000 to 10,000 times, and then immersing the object to be cleaned in the aqueous detergent solution; by directly soaking a sponge or the like in the undiluted solution or an aqueous detergent solution diluted 1 to 20 times; or by spraying the undiluted solution 8 to 20 times onto the object to be cleaned and then hand-washing it with a sponge or the like. The highly concentrated, shrinkable neutral liquid detergent composition of the present invention, either as the undiluted solution or as a diluted solution diluted at an appropriate dilution ratio, can also be used to clean hard surfaces such as floors, walls, work tables, and shelves in the above-mentioned kitchens, workshops, and kitchens. [Example]

[0060] The present invention will be described in more detail below with reference to examples and comparative examples, but the present invention is not limited to these examples. The components of the high-concentration neutral liquid detergent compositions used in the formulation of the high-concentration neutral liquid detergent compositions of the examples and comparative examples are shown in Tables 1 to 11 below. The numerical values ​​relating to the blending amounts shown in Tables 1 to 11 below represent the ratio (mass %) of the pure content of each component to the high-concentration neutral liquid detergent composition, and the "balance" indicating the water content indicates the blending amount adjusted so that the total amount of the final high-concentration neutral liquid detergent composition is 100 mass %. The high-concentration neutral liquid detergent compositions were used to carry out the measurements and evaluations described below. The measurement and evaluation results are also shown in Tables 1 to 11.

[0061] Component (A) A-1: Linear alkylbenzene sulfonic acid monoethanolamine (Teika Corporation, Teika Power L121, neutralized) A-2: Linear alkylbenzenesulfonic acid triethanolamine (Teika Corporation, Teika Power L121, neutralized) A-3: Linear alkylbenzenesulfonate potassium (Teika Corporation, Teika Power L121, neutralized)

[0062] (B) Component B-1: Coconut oil fatty acid diethanolamide (WOODLAND FOOD INDUSTIRIES Pte. Ltd, CDE80-300) B-2: Palm kernel oil fatty acid diethanolamide (WOODLAND FOOD INDUSTIRIES Pte. Ltd, KDE800-300)

[0063] (C) Component C-1: Monoethanolamine sulfate C-2: Ammonium chloride C-3: Ammonium sulfate C-4: Diammonium hydrogen citrate C-5: Monoethanolamine hydrochloride C-6: Sodium chloride

[0064] (D) Component D-1: Sodium α-olefin sulfonate (Clariant Japan Co., Ltd., HOSTAPUR OS Liq) D-2: Sodium polyoxyethylene alkyl ether sulfate (Teika Corporation, Teikapol NE7030) D-3: Sodium alkanesulfonate (Clariant Japan Co., Ltd., HOSTAPUR SAS 30 SB)

[0065] (E) Component E-1: Ion-exchanged water

[0066] (F) Component F-1: Lauryl amidopropyl betaine (InterMed Manufacturing Sdn. Bhd., IMEX LB 30) F-2: Lauryl dimethylaminoacetic acid betaine (InterMed Manufacturing Sdn. Bhd., IMEX DLB 35) F-3: Sodium laurylaminodipropionate (Lion Specialty Chemicals Co., Ltd., Energy Coal DP-30) F-4: Potassium lauryl aspartate (New Japan Chemical Co., Ltd., Njebon ASP-12KL) F-5: 2-Alkyl-N-carboxymethyl-N-hydroxyethylimidazolinium betaine (Kawaken Fine Chemicals Co., Ltd., Softazoline CH)

[0067] (G) Component G-1: Propylene glycol (ADEKA Corporation, industrial propylene glycol) G-2: Denatured ethanol (Yamaichi Chemical Industry Co., Ltd., Mixed Ethanol NP) G-3: Diethylene glycol monobutyl ether (KH Neochem Co., Ltd., Butycenol 20) G-4: Polyethylene glycol (Sanyo Chemical Industries, Ltd., PEG-300) G-5: Urea

[0068] Other ingredients H-1: Disodium ethylenediaminetetraacetate H-2: Trisodium methylglycinediacetate H-3: Tetrasodium glutamate diacetate H-4: 2-Methyl-4-isothiazolin-3-one H-5: 5-Chloro-2-methyl-4-isothiazolin-3-one H-6: 1,2-Benzisothiazolin-3-one

[0069] Method for measuring the pH of a high-concentration neutral liquid detergent composition: <Calibration of the pH meter> Connect a combined electrode for pH measurement (manufactured by Horiba, Ltd.; Standard ToupH electrode 9615S-10D) to a pH meter (manufactured by Horiba, Ltd.; pH / Ion meter F-72), and turn on the power. As the internal solution of the pH electrode, a saturated potassium chloride aqueous solution (3.33 mol / L) was used. Next, fill 100 mL beakers with pH 4.01 standard solution (phthalate standard solution), pH 6.86 standard solution (neutral phosphate standard solution), and pH 9.18 standard solution (borate standard solution), respectively, and immerse them in a thermostatic bath at 25°C for 30 minutes. Immerse the pH measurement electrode in the thermostatically adjusted standard solution for 3 minutes, and perform the calibration operation in the order of pH 6.86, pH 9.18, and pH 4. Continue reading the original text and translate it line by line, maintaining the same number of lines as the original and preserving special placeholders.01. <pH measurement> Immerse the pH measurement electrode in 100 mL of the high-concentration neutral liquid detergent composition adjusted to a constant temperature of 25°C in a thermostatic bath for 3 minutes, and measure the pH.

[0070] ※1: Method for measuring the viscosity (stock solution) <Test method> Attach a rotor numbered 2 to a B-type viscometer (BLII type, manufactured by Toki Sangyo Co., Ltd.), and immerse the rotor in the high-concentration neutral liquid detergent composition (stock solution) adjusted to a constant temperature of 25°C in a thermostatic bath. Rotate the rotor at 30 rpm, and measure the viscosity 300 seconds after the start of rotation. <Evaluation criteria> ◎: Viscosity is 90 mPa·s or more and 230 mPa·s or less ○: Viscosity is 80 mPa·s or more and less than 90 mPa·s Or, more than 230 mPa·s and less than 250 mPa·s △: Viscosity is 70 mPa·s or more and less than 80 mPa·s Or, over 250 mPa·s and 300 mPa·s or less ×: Viscosity is less than 70 mPa·s or more than 300 mPa·s The products were judged as practical with △, ○ and ◎.

[0071] *1: Viscosity measurement method (6x diluted solution, 8x diluted solution) <Test Method> A rotor with rotor number 2 was attached to a B-type viscometer (BLII model, manufactured by Toki Sangyo Co., Ltd.), and the rotor was immersed in a highly concentrated neutral liquid detergent composition (6-fold diluted solution, 8-fold diluted solution) that had been kept at a constant temperature of 25°C in a thermostatic chamber. The rotor was rotated at 30 rpm, and the viscosity was measured 300 seconds after the start of rotation. <Evaluation criteria> ◎: Viscosity is 90 mPa·s or more and 400 mPa·s or less ○: Viscosity is 80 mPa·s or more and less than 90 mPa·s, Or, more than 400 mPa·s and less than 450 mPa·s △: Viscosity is 70 mPa·s or more and less than 80 mPa·s Or, over 450 mPa·s and 500 mPa·s or less ×: Viscosity is less than 70 mPa·s or more than 500 mPa·s The products were judged as practical with △, ○ and ◎.

[0072] *2: Cleaning test <Test Method> 5 g of model soil (20 g milk, 20 g raw egg (egg yolk), 3 g butter, and 3 g flour mixed together at 50°C) was applied to a 20 cm diameter melamine dish and allowed to dry at room temperature. 1 g of a high-concentration neutral liquid detergent composition diluted 8 times was applied to a dishwashing sponge (11.5 x 7.5 x 3.0 cm) soaked in hard water equivalent to 50 mg / L of calcium carbonate (German hardness 2.5°DH). The sponge was rubbed with hands 10 times, after which the dish was washed for 10 seconds and rinsed with running water for 15 seconds. Remaining soiling was assessed visually and by feel (slippery feel). If the dish was clean, the same process was repeated without adding any more detergent until the dish could no longer be washed. Cleaning performance was evaluated based on the number of dishes that could be washed. <Evaluation criteria> ◎: 15 or more ○: 10~14 sheets △: 5~9 pieces ×: 4 or less The products were judged as practical with △, ○ and ◎.

[0073] *3: Foam persistence test <Test Method> A dishwashing sponge (11.5 cm x 7.5 cm x 3.0 cm) was soaked in 1 g of each high-concentration neutral liquid detergent composition diluted 8 times with hard water (50 mg / L calcium carbonate equivalent [German hardness 2.5°DH]) and the hard water, and then rubbed by hand 10 times to create foam. Five grams of commercially available salad oil was then added to the dishwashing sponge as a stain, and the rubbed sponge was repeated another 10 times to create foam. This process was repeated twice, and foam persistence (foam retention) was evaluated based on the foaming state. <Evaluation criteria> ◎: Abundant foam is produced even after adding dirt ○: Foams even after adding dirt △: Some foaming occurs even after adding dirt ×: When dirt is added, almost no foam is produced. The products were judged as practical with △, ○ and ◎.

[0074] *4: Storage stability test (undiluted solution) <Test Method> 200 ml of the high-concentration neutral liquid detergent composition was placed in a 250 ml transparent polypropylene container, which was then capped and stored in a thermostatic chamber at 40° C. After 6 months, the appearance was observed and evaluated according to the following criteria. <Evaluation criteria> ○: No precipitate or turbidity is observed and the solution is stable. △: Some precipitates or turbidity are observed. ×: Precipitation or turbidity becomes significant and separation is observed. In the above evaluation, △ and ◯ were judged as practical.

[0075] *4: Low temperature stability test (undiluted solution) <Test Method> 200 ml of the high-concentration neutral liquid detergent composition was placed in a 250 ml transparent polypropylene container, which was then capped and stored in a thermostatic chamber at −5° C. After one month, the appearance was observed and evaluated according to the following criteria. <Evaluation criteria> ○: No precipitate or turbidity is observed and the solution is stable. △: Some precipitates or turbidity are observed. ×: Precipitation or turbidity becomes significant and separation is observed. In the above evaluation, △ and ◯ were judged as practical.

[0076] *4: Low temperature stability test (8 times diluted solution) <Test Method> 200 ml of an 8-fold diluted solution of a high-concentration neutral liquid detergent composition was placed in a 250 ml transparent polypropylene container, the container was capped, and the container was stored and left to stand in a thermostatic chamber at −5° C. After one month, the appearance was observed and evaluated according to the following criteria. <Evaluation criteria> ○: No precipitate or turbidity is observed and the solution is stable. △: Some precipitates or turbidity are observed. ×: Precipitation or turbidity becomes significant and separation is observed. In the above evaluation, △ and ◯ were judged as practical.

[0077] *5: Bacterial sterilization test <Test bacteria> Staphyrococcus aureus (NBRC12732) was used as the test bacterium. The test bacterium was smeared on SCD agar medium (manufactured by Eiken Chemical Co., Ltd.) and cultured at 37°C for 24 hours, after which the colony was scraped off and smeared on a new SCD agar medium (manufactured by Eiken Chemical Co., Ltd.) and cultured at 37°C for 24 hours. The colony was scraped off and diluted in physiological saline to be used as the bacterial suspension. <Test Method> The bacterial suspension was mixed in 0.3% by mass nutrient medium (Eiken Chemical Co., Ltd.) and 3°DH hard water to a final concentration of 7.0 × 10 7 ~7.0×10 8 The test bacterial solution was adjusted to a CFU / mL. Next, a cylindrical dish sponge with a diameter of 2.4 cm and a height of 3 cm was placed in a 110 mL screw-cap bottle. 0.5 mL of the test bacterial solution was added to the dish sponge to inoculate it, and the test bacterial solution was then evenly massaged into the sponge using a sterile glass rod. The screw-cap bottle was then sealed and left at 25±1°C for 1 hour to allow the test bacterial solution to penetrate the dish sponge. After leaving the bottle, the screw-cap bottle was opened, and 0.5 mL of an 8-fold diluted high-concentration neutral liquid detergent composition or a 0.05 (W / V)% aqueous solution of polysorbate 80 (manufactured by Tokyo Chemical Industry Co., Ltd., product name "Tween 80") was added as a control detergent to inoculate the dish sponge. The high-concentration neutral liquid detergent composition or the control detergent was then evenly massaged into the dish sponge using a new sterile glass rod. The screw-cap bottle was then resealed and left at 25±1°C for 18 hours. After standing, the screw-cap bottle was opened, 20 ml of SCDLP medium (manufactured by Eiken Chemical Co., Ltd.) was added to the bottle, and the dish sponge was inoculated. A new sterilized glass rod was used to evenly massage the SCDLP medium (manufactured by Eiken Chemical Co., Ltd.) into the dish sponge. A 10-fold dilution series was prepared using the liquid extracted from the dish sponge, and the dilution was mixed on SCD agar medium and cultured at 37°C for 48 hours. After culture, the viable cell count was measured, and the value obtained by subtracting the logarithm of the cell count when the high-concentration neutral liquid detergent composition was used (AV2) from the logarithm of the cell count when the control detergent was used (AV1) was used to obtain the disinfecting activity value [Number 1]. The disinfecting activity was evaluated according to the following evaluation criteria. [Number 1] Disinfecting activity value = AV1 - AV2 AV1: Common logarithm of the viable bacterial count on the test specimen treated with the control sample. AV2: Common logarithm of the viable bacterial count on a test piece treated with an 8-fold diluted high-concentration neutral liquid detergent composition. <Evaluation method> ◎: Disinfecting activity value is 4 or more ○: Disinfecting activity value is 3 or more and less than 4 △: Sterilization activity value is 2 or more and less than 3 ×: Sterilization activity value is less than 2

[0078] [Table 1]

[0079] [Table 2]

[0080] [Table 3]

[0081] [Table 4]

[0082] [Table 5]

[0083] [Table 6]

[0084] [Table 7]

[0085] [Table 8]

[0086]

Table 9

[0087]

Table 10

[0088]

Table 11

Claims

1. (A) component: linear alkylbenzenesulfonic acid and / or a salt thereof; (B) a fatty acid alkanolamide as component; (C) a water-soluble salt as component, and (D) an anionic surfactant other than (A); and wherein the total amount of component (A) and component (B) is 20% by mass or more and 55% by mass or less.

2. 2. The high-concentration neutral liquid detergent composition according to claim 1, characterized in that the mass ratio (D) / (A) of the mass of component (D) to the mass of component (A) is 0.0020 or more and 0.70 or less.

3. 3. The highly concentrated neutral liquid detergent composition according to claim 1, further comprising, as component (C), at least one selected from the group consisting of ammonium salts and alkanolamine salts.

4. 3. The highly concentrated neutral liquid detergent composition according to claim 1, further comprising, as component (C), at least one selected from ammonium chloride, ammonium sulfate, diammonium hydrogen citrate, triammonium citrate, monoethanolamine hydrochloride, monoethanolamine sulfate, monoethanolamine citrate, diethanolamine hydrochloride, diethanolamine sulfate, diethanolamine citrate, triethanolamine hydrochloride, triethanolamine sulfate, and triethanolamine citrate.

5. 3. The highly concentrated neutral liquid detergent composition according to claim 1, further comprising, as component (D), at least one selected from the group consisting of α-olefin sulfonates, polyoxyethylene alkyl ether sulfates, and alkanesulfonates.

6. 3. The highly concentrated neutral liquid detergent composition according to claim 1, further comprising, as component (F), at least one selected from carboxylic acid-type amphoteric surfactants.

7. 3. The high-concentration neutral liquid detergent composition according to claim 1, wherein the mass ratio (F) / ((A)+(B)) of the mass of component (F) to the total mass of component (A) and component (B) is 0.0030 or more and 0.50 or less.

8. 3. The highly concentrated neutral liquid detergent composition according to claim 1, further comprising, as component (G), at least one selected from the group consisting of alcohol-based solvents, glycol-based solvents, and urea.

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