Liquid cleaning agent composition

Abstract

The present invention provides: a liquid cleaning agent composition that has excellent liquid-color stability at a high temperature, excellent low temperature storage stability, and superior ability in preventing wrinkling and in cleaning sebum stains in textile products even when water having a high hardness is used; and a method that is for cleaning textile products and that has superior ability in preventing wrinkling and in cleaning sebum stains in textile products even when water having a high hardness is used.　This liquid cleaning agent composition contains: (a) an anionic surfactant (hereinafter, referred to as component (a)) containing an internal olefin sulfonate (hereinafter, referred to as component (a1)) having 16-24 carbon atoms; (b1) an amine-based alkaline agent; (b2) a carbonate-based alkaline agent; and water. The contained amount of component (a1) in component (a) is 70-100 mass%. The liquid cleaning agent composition has a pH of 8.5-11.0 at 20°C.

Description

Liquid cleaning composition

[0001] The present invention relates to a liquid detergent composition and a method for cleaning textile products.

[0002] BACKGROUND ART In recent years, the performance requirements that consumers have for liquid detergent compositions for textile products have become more diverse, and consumers are now looking for not only cleaning performance but also the ability to maintain the after-wash performance (softness and wrinkle resistance of textile products).

[0003] Conventionally, anionic surfactants, particularly alkylbenzene sulfonates, olefin sulfonates, internal olefin sulfonates obtained from an internal olefin having a double bond not at the end of the olefin chain but inside the chain, and nonionic surfactants containing an oxyalkylene group having 2 to 3 carbon atoms have been widely used as cleaning ingredients for household and industrial use.

[0004] WO 2017 / 209117 discloses a fabric detergent composition containing the following components (A), (B), and (C), wherein the mass ratio (B) / (A) of component (B) to component (A) is 0 or more and 1.0 or less, and when the composition contains component (B), it also contains a nonionic surfactant having an HLB of more than 10.5, and the content of component (C) is 20 mass% or less, and the composition is for use in washing fabrics in water containing a hardness component: Component (A): internal olefin sulfonate having from 17 to 24 carbon atoms Component (B): nonionic surfactant Component (C): metal ion chelating agent

[0005] JP 2021-134324 A discloses a liquid detergent article for textile products, which is obtained by containing in a bag-shaped container a liquid detergent composition for textile products, the liquid detergent composition comprising: (A) an internal olefin sulfonate (hereinafter referred to as component (A)) in an amount of 1% by mass to 50% by mass; (B) an alkanolamine (hereinafter referred to as component (B)) in an amount of 0.01% by mass to 10% by mass; (C) an organic solvent having a hydroxyl group (hereinafter referred to as component (C)) in an amount of 0.1% by mass to 40% by mass; and water; wherein the proportion of internal olefin sulfonate having 18 carbon atoms (hereinafter referred to as component (A1)) in component (A) is 80% by mass or more; and the pH at 20°C is 6.0 to 11.0.

[0006] Summary of the Invention It is known that detergent compositions using an internal olefin sulfonate having a hydrocarbon group with a specific number of carbon atoms as a surfactant are excellent not only in cleaning performance for textile products but also in after-wash performance (softness and wrinkle resistance of textile products). However, the present inventors have found that when textile products are washed with high-hardness water using a detergent composition using this internal olefin sulfonate, the compatibility of cleaning performance and after-wash performance is not satisfactory to consumers.

[0007] The present invention provides a liquid detergent composition that has good liquid color stability at high temperatures and good storage stability at low temperatures, and that is excellent in sebum stain cleansing properties and wrinkle prevention properties for textile products even when high-hardness water is used; and a textile product cleaning method that is excellent in sebum stain cleansing properties and wrinkle prevention properties for textile products even when high-hardness water is used.

[0008] The present invention relates to a liquid detergent composition comprising (a) an anionic surfactant (hereinafter referred to as component (a)) containing an internal olefin sulfonate salt having from 16 to 24 carbon atoms (hereinafter referred to as component (a1)), (b1) an amine-based alkaline agent (hereinafter referred to as component (b1)), (b2) a carbonate-based alkaline agent (hereinafter referred to as component (b2)), and water, wherein the content of component (a1) in component (a) is from 70 to 100% by mass, and the pH at 20°C is from 8.5 to 11.0.

[0009] The present invention also relates to a method for washing textile products, comprising: (a) an anionic surfactant (hereinafter referred to as component (a)) containing an internal olefin sulfonate salt having from 16 to 24 carbon atoms (hereinafter referred to as component (a1)); (b1) an amine-based alkali agent (hereinafter referred to as component (b1)); (b2) a carbonate-based alkali agent (hereinafter referred to as component (b2)); and water, wherein the content of component (a1) in component (a) is from 70% by mass to 100% by mass and the pH is from 7.5 to 10.5.

[0010] According to the present invention, there are provided a liquid detergent composition that has good liquid color stability at high temperatures and good storage stability at low temperatures, and that is excellent in sebum stain cleaning properties and wrinkle prevention properties for textile products even when high-hardness water is used, and a textile product cleaning method that is excellent in sebum stain cleaning properties and wrinkle prevention properties for textile products even when high-hardness water is used.

[0011] Modes for Carrying Out the Invention [Liquid Detergent Composition] The reasons why the liquid detergent composition of the present invention has good liquid color stability at high temperatures and low-temperature storage stability, and excellent sebum stain cleansing properties and wrinkle prevention properties for textile products, are not entirely clear, but are presumed to be as follows. Component (a1) forms micelles and vesicles in the cleaning solution, and the micelles act on sebum stains attached to textile products, while the vesicles modify the surface of the textile products, thereby achieving both good sebum stain cleansing properties and a good finish. However, when high-hardness water is used in the cleaning solution, component (a1) binds with the large amount of calcium contained in the water, resulting in the formation of many vesicles and reduced micelle formation, resulting in insufficient sebum stain cleansing properties. Therefore, the present inventors have discovered a liquid detergent composition of the present invention that uses component (a1) in combination with specific alkaline agents, component (b1) and component (b2), in a specific mass ratio. When high-hardness water is used in the cleaning solution, much of component (a1) forms vesicles, which deteriorates sebum stain cleansing properties. Furthermore, when component (a1) is used in combination with another surfactant effective in cleaning sebum stains, the cleaning ability for sebum stains improves, but the vesicle formation of component (a1) is significantly hindered, making it impossible to achieve both cleaning ability for sebum stains and wrinkle prevention. In the liquid detergent composition of the present invention, components (a1), (b1), and (b2) are used, and the specific alkaline agents of components (b1) and (b2) do not affect the vesicle formation of component (a1), so surface modification of textile products can be performed. Furthermore, the specific alkaline agents of components (b1) and (b2) act on sebum stains, neutralizing the fatty acids in the sebum stains, which then function as surfactants, thereby cleaning the sebum stains. It is presumed that this achieves both cleaning ability for sebum stains and a good finish. Furthermore, it is presumed that the liquid detergent composition of the present invention can improve both liquid color stability at high temperatures and low-temperature storage stability by using the alkaline agent of component (b1) and the alkaline agent of component (b2) in combination in a specific mass ratio.

[0012] <Component (a)> The component (a) of the present invention is an anionic surfactant containing an internal olefin sulfonate (component (a1)) having from 16 to 24 carbon atoms. The carbon number of the internal olefin sulfonate having from 16 to 24 carbon atoms represents the carbon number of the internal olefin to which the sulfonate is covalently bonded. The carbon number of the internal olefin sulfonate having from 16 to 24 carbon atoms is 17 or more, preferably 18 or more, from the viewpoint of wrinkle prevention of fibers, and is 24 or less, preferably 22 or less, more preferably 20 or less, from the viewpoint of cleansing ability for sebum stains.

[0013] The internal olefin sulfonate of the present invention is a sulfonate obtained by sulfonating, neutralizing, and hydrolyzing a raw material internal olefin (an olefin having a double bond within the olefin chain) having from 16 to 24 carbon atoms. Such internal olefins also include those containing trace amounts of so-called alpha olefins (hereinafter also referred to as α-olefins), in which the double bond is located at position 1 of the carbon chain. Furthermore, sulfonation of an internal olefin quantitatively produces β-sultone, and a portion of the β-sultone is converted to γ-sultone and olefin sulfonic acid. These are further converted to hydroxyalkanesulfonate and olefin sulfonate in the neutralization and hydrolysis steps (e.g., J. Am. Oil Chem. Soc. 69, 39 (1992)). The hydroxy group of the resulting hydroxyalkanesulfonate is located within the alkane chain, and the double bond of the olefin sulfonate is located within the olefin chain. The resulting product is primarily a mixture of these compounds, and may contain trace amounts of hydroxyalkanesulfonates having a hydroxy group at the end of the carbon chain or olefinsulfonates having a double bond at the end of the carbon chain. In this specification, these products and their mixtures are collectively referred to as internal olefinsulfonates (component (a1)). Hydroxyalkanesulfonates are also referred to as hydroxy internal olefinsulfonates (hereinafter also referred to as HAS), and olefinsulfonates are also referred to as olefin internal olefinsulfonates (hereinafter also referred to as IOS). The mass ratio of HAS to IOS compounds in component (a1) can be measured using a high-performance liquid chromatography mass spectrometer (hereinafter abbreviated as HPLC-MS). Specifically, the mass ratio can be determined from the HPLC-MS peak area of ​​component (a1).

[0014] Examples of the salt of the internal olefin sulfonate include alkali metal salts, alkaline earth metal (half atom) salts, ammonium salts, and organic ammonium salts. Examples of the alkali metal salts include sodium salts and potassium salts. Examples of the organic ammonium salts include alkanolammonium salts having from 2 to 6 carbon atoms. From the viewpoint of versatility, the salt of the internal olefin sulfonate is preferably an alkali metal salt, and more preferably at least one selected from the sodium salt and the potassium salt.

[0015] As is clear from the above production method, the sulfonic acid group of the internal olefin sulfonate of component (a1) is present within the carbon chain of the internal olefin sulfonate, i.e., the olefin chain or alkane chain, and a small amount of the internal olefin sulfonate may contain a sulfonic acid group at the end of the carbon chain.

[0016] In component (a1), from the viewpoint of wrinkle prevention of the fiber, the content of internal olefin sulfonate salts in which the sulfonic acid group is present at the 5th or higher position, preferably from the 5th to the 9th position, is preferably 5% by mass or higher, more preferably 10% by mass or higher, even more preferably 15% by mass or higher, still more preferably 20% by mass or higher, still more preferably 30% by mass or higher, still more preferably 35% by mass or higher, and preferably 60% by mass or lower, more preferably 50% by mass or lower, and even more preferably 40% by mass or lower.

[0017] In component (a1), the mass ratio (IO-1S) / (IO-2S), which is the ratio of the content of internal olefin sulfonate salts in which the sulfonic acid groups are present at positions 2 to 4 (hereinafter may be referred to as (IO-1S)), to the content of internal olefin sulfonate salts in which the sulfonic acid groups are present at positions 5 or more, preferably 5 to 9 (hereinafter may be referred to as (IO-2S)), is preferably 0.5 or more, more preferably 0.7 or more, even more preferably 1.0 or more, still more preferably 1.4 or more, and is preferably 10 or less, more preferably 6 or less, even more preferably 5 or less, still more preferably 3 or less, still more preferably 2 or less, and still more preferably 1.8 or less, from the viewpoint of wrinkle prevention of the fiber.

[0018] The content of each compound having a sulfonic acid group at a different position in component (a1) can be measured by HPLC-MS using the method described in the Examples. In this specification, the content of each compound having a sulfonic acid group at a different position is determined as a mass ratio based on the HPLC-MS peak area of ​​the compound having a sulfonic acid group at each position in the total HAS form of component (a1).

[0019] The content of the olefin sulfonate salt in which the sulfonic acid group is at position 1 in component (a1) is preferably 10% by mass or less, more preferably 7% by mass or less, even more preferably 5% by mass or less, still more preferably 3% by mass or less, and still more preferably 2% by mass or less, from the viewpoint of imparting good wrinkle resistance to fibers even when the temperature of the water used for washing is as low as 0° C. or more and 15° C. or less, and is preferably 0.01% by mass or more from the viewpoint of reducing production costs and improving productivity. The position of the sulfonic acid group in these compounds is a position in the olefin chain or alkane chain.

[0020] The internal olefin sulfonate may be a mixture of a hydroxyl form and an olefin form. The mass ratio of the content of the olefin form in the internal olefin sulfonate to the content of the hydroxyl form in the internal olefin sulfonate (olefin form / hydroxyl form) in component (a1) may be 0 / 100 or more, further 5 / 95 or more, further 10 / 90 or more, and may be 50 / 50 or less, further 40 / 60 or less, further 30 / 70 or less, further 25 / 75 or less, or further 20 / 80 or less.

[0021] The mass ratio of the content of the hydroxy form of the internal olefin sulfonate to the content of the olefin form of the internal olefin sulfonate in the component (a1) can be measured by HPLC-MS using the method described in the Examples.

[0022] Component (a1) can be produced by sulfonating, neutralizing, and hydrolyzing a raw material internal olefin having 16 to 24 carbon atoms. The sulfonation reaction can be carried out by reacting 1.0 to 1.2 moles of sulfur trioxide gas with 1 mole of internal olefin. The reaction temperature can be 20 to 40°C. Neutralization is carried out by reacting an aqueous alkali solution such as sodium hydroxide, ammonia, or 2-aminoethanol in an amount 1.0 to 1.5 times the theoretical amount of sulfonic acid groups. The hydrolysis reaction can be carried out in the presence of water at 90 to 200°C for 30 minutes to 3 hours. These reactions can be carried out continuously. After the reaction is complete, the product can be purified by extraction, washing, etc. In producing the internal olefin sulfonate (a1), the sulfonation, neutralization, and hydrolysis treatments may be carried out using a raw material internal olefin having a carbon number distribution of 16 to 24, or the sulfonation, neutralization, and hydrolysis treatments may be carried out using a raw material internal olefin having a single carbon number. Alternatively, multiple types of internal olefin sulfonates having different carbon numbers that have been produced in advance may be mixed, as necessary.

[0023] In the present invention, the internal olefin refers to an olefin having a double bond inside the olefin chain, as described above. The number of carbon atoms of the internal olefin used as the raw material for component (a1) is 16 to 24. The internal olefin used as the raw material for component (a1) may be used alone or in combination of two or more.

[0024] Examples of anionic surfactants other than component (a1) as component (a) include one or more selected from alkylbenzene sulfonates, alkyl or alkenyl ether sulfates, alkyl or alkenyl sulfates, olefin sulfonates other than component (a1), alkanesulfonates, saturated or unsaturated fatty acid salts, alkyl or alkenyl ether carboxylates, α-sulfofatty acid salts, N-acylamino acids, mono- or di-phosphate esters, and sulfosuccinate esters. Examples of alkyl ether sulfates include polyoxyethylene alkyl ether sulfates. The alkyl or alkenyl group of the anionic surfactant has, for example, 8 to 22 carbon atoms. The average number of moles of oxyethylene groups added in the anionic surfactant is, for example, 0 to 10. Counter ions of the anionic groups of these anionic surfactants include alkali metal ions such as sodium ions and potassium ions, alkaline earth metal ions such as calcium ions and magnesium ions, ammonium ions, and alkanolamines having 1 to 3 alkanol groups each having 2 or 3 carbon atoms (e.g., monoethanolamine, diethanolamine, triethanolamine, triisopropanolamine, etc.). These anionic surfactants can be used alone or in combination of two or more.

[0025] <Component (b1)> The component (b1) is an amine-based alkaline agent. Examples of the amine-based alkaline agent of the component (b1) include one or more selected from alkanolamines and amino acids.

[0026] The alkanolamine is preferably a primary to tertiary monoamine compound, and includes an amine compound having one to three hydroxyalkyl groups bonded to a nitrogen atom and having from 2 to 4 carbon atoms. When the alkanolamine has a group other than a hydroxyalkyl group, such a group may be an organic group, for example, an alkyl group having from 1 to 4 carbon atoms, preferably a methyl group.

[0027] Specific examples of the alkanolamine include one or more selected from monoethanolamine, diethanolamine, triethanolamine, monopropanolamine, dipropanolamine, tripropanolamine, tris(hydroxymethyl)aminomethane, N-methylethanolamine, N-methylpropanolamine, and N-ethylethanolamine.

[0028] The amino acid may be one or more selected from neutral amino acids and basic amino acids. Examples of neutral amino acids include glycine, sarcosine, L-serine, β-alanine, aminobutyric acid, etc. Examples of basic amino acids include arginine, lysine, etc.

[0029] From the viewpoints of sebum stain cleansing ability and low-temperature stability, the component (b1) is preferably one or more selected from monoethanolamine, diethanolamine, triethanolamine, glycine, arginine, and tris(hydroxymethyl)aminomethane, more preferably one or more selected from monoethanolamine, diethanolamine, triethanolamine, and glycine, even more preferably one or more selected from monoethanolamine and glycine, and still more preferably monoethanolamine.

[0030] Component (b1) may be incorporated into the composition as a counter ion of component (a), for example, the internal olefin sulfonate salt of component (a1). Component (b1) may also exist in the composition as an ammonium ion depending on the pH of the composition. In the present invention, such a compound in the form of an ammonium ion is also considered to be component (b1).

[0031] <Component (b2)> The component (b2) of the present invention is a carbonate-based alkaline agent. Examples of the carbonate-based alkaline agent of component (b2) include one or more selected from sodium carbonate, potassium carbonate, sodium sesquicarbonate, potassium sesquicarbonate, sodium bicarbonate, and potassium bicarbonate. From the viewpoint of production costs, one or more selected from sodium carbonate, potassium carbonate, sodium bicarbonate, and potassium bicarbonate are preferred. From the viewpoints of liquid color stability at high temperatures and solubility, one or more selected from potassium carbonate and potassium bicarbonate are more preferred.

[0032] <Composition, etc.> The liquid detergent composition of the present invention contains component (a) in an amount of preferably 5% by mass or more, more preferably 8% by mass or more, and even more preferably 12% by mass or more from the viewpoints of fabric wrinkle prevention and sebum stain cleansing ability, and in an amount of preferably 50% by mass or less, more preferably 40% by mass or less, even more preferably 30% by mass or less, still more preferably 20% by mass or less, and still more preferably 18% by mass or less from the viewpoint of liquid color stability at high temperatures. Note that, in the liquid detergent composition of the present invention, the mass of component (a) (including component (a1)) is specified as the value converted to the sodium salt.

[0033] In the liquid detergent composition of the present invention, the content of component (a1) in component (a) is 70% by mass or more, preferably 80% by mass or more, more preferably 90% by mass or more, and may be 100% by mass or less, from the viewpoint of wrinkle prevention of fibers.

[0034] From the viewpoints of wrinkle prevention properties for fabrics and product stability, the liquid detergent composition of the present invention contains component (a1) in an amount of preferably 5% by mass or more, more preferably 8% by mass or more, even more preferably 12% by mass or more, and preferably 50% by mass or less, more preferably 40% by mass or less, even more preferably 30% by mass or less, even more preferably 20% by mass or less, and even more preferably 18% by mass or less.

[0035] The liquid detergent composition of the present invention contains component (b1) in an amount of preferably 0.5 mass % or more, more preferably 0.65 mass % or more, and even more preferably 0.8 mass % or more, from the viewpoints of low-temperature stability and sebum stain cleansing ability, and in an amount of preferably 2.8 mass % or less, more preferably 2.5 mass % or less, even more preferably 1.9 mass % or less, and even more preferably 1.5 mass % or less, from the viewpoint of liquid color stability at high temperatures.

[0036] The liquid detergent composition of the present invention contains component (b2) in an amount of preferably 0.3 mass% or more, more preferably 0.5 mass% or more, and even more preferably 1.1 mass% or more, from the viewpoint of sebum stain cleansing ability and liquid color stability at high temperatures; and in an amount of preferably 4.2 mass% or less, more preferably 3.4 mass% or less, even more preferably 2.5 mass% or less, and even more preferably 2 mass% or less, from the viewpoint of low-temperature stability.

[0037] In the liquid detergent composition of the present invention, the mass ratio (b2) / [(b1)+(b2)] of the content of the (b2) component to the total content of the (b1) component and the (b2) component is preferably 0.1 or more, more preferably 0.17 or more, even more preferably 0.37 or more, and still more preferably 0.4 or more, from the viewpoints of sebum stain cleansing ability and liquid color stability at high temperatures, and is preferably 0.83 or less, more preferably 0.75 or less, and even more preferably 0.65 or less, from the viewpoints of sebum stain cleansing ability and low-temperature stability.

[0038] In the liquid detergent composition of the present invention, the mass ratio of the total content of the components (b1) and (b2) to the content of the component (a), [(b1) + (b2)] / (a), is preferably 0.13 or more, more preferably 0.15 or more, and even more preferably 0.18 or more, from the viewpoint of sebum stain cleansing ability, and is preferably 0.65 or less, more preferably 0.5 or less, and even more preferably 0.35 or less, from the viewpoints of sebum stain cleansing ability, liquid color stability at high temperatures, fabric wrinkle prevention, and low-temperature stability.

[0039] In the liquid detergent composition of the present invention, the mass ratio of the total content of the components (b1) and (b2) to the content of the component (a1), [(b1) + (b2)] / (a1), is preferably 0.13 or more, more preferably 0.15 or more, and even more preferably 0.18 or more, from the viewpoint of sebum stain cleansing ability, and is preferably 0.65 or less, more preferably 0.5 or less, and even more preferably 0.35 or less, from the viewpoints of sebum stain cleansing ability, liquid color stability at high temperatures, fabric wrinkle prevention, and low-temperature stability.

[0040] From the viewpoint of low-temperature stability and viscosity adjustment, the liquid detergent composition of the present invention may contain, as component (c), a polyalkylene glycol having a weight-average molecular weight of 100 to 100,000. Examples of component (c) include one or more selected from polyethylene glycol and polypropylene glycol. The weight-average molecular weight of component (c) is 100 or more, preferably 500 or more, and 10,000 or less, preferably 2,000 or less, and more preferably 1,500 or less. Here, the weight-average molecular weight is a value determined by gel permeation chromatography using polystyrene as a standard substance.

[0041] The liquid detergent composition of the present invention contains component (c) in an amount of preferably 0.05% by mass or more, more preferably 0.1% by mass or more, even more preferably 0.15% by mass or more, and preferably 10% by mass or less, more preferably 5% by mass or less, even more preferably 1% by mass or less, and even more preferably 0.5% by mass or less, from the viewpoints of low-temperature stability, viscosity adjustment, and not interfering with the wrinkle prevention properties of fibers.

[0042] The liquid detergent composition of the present invention may contain a fragrance composition as component (d). The liquid detergent composition of the present invention preferably contains a fragrance composition comprising various fragrance compounds used in detergent products for fabrics. Examples of fragrance compounds constituting the fragrance composition include the fragrance compounds described in JP 2017-214676 A. The fragrance composition may be incorporated into the liquid detergent composition in the form of a microcapsule particle or in the form of an outer fragrance (non-microcapsule). Microcapsules are formed by encapsulating a fragrance composition, which is a functional ingredient. For example, the fragrance composition is encapsulated in a resin for the outer shell (wall material) of the microcapsule by a known method.

[0043] The liquid detergent composition of the present invention contains water. The water may be deionized water (sometimes called ion-exchanged water) or water to which sodium hypochlorite has been added in an amount of 1 mg / kg to 5 mg / kg based on the ion-exchanged water. Tap water may also be used.

[0044] The liquid detergent composition of the present invention contains water in an amount of preferably 50% by mass or more, more preferably 60% by mass or more, even more preferably 70% by mass or more, and preferably 95% by mass or less, more preferably 90% by mass or less, even more preferably 85% by mass or less.

[0045] The liquid detergent composition of the present invention may contain components that are added to general compositions used in treating textile products, such as organic solvents, pH adjusters, preservatives, pigments, chelating agents, hydrotropes, etc. (excluding components (a), (b1), (b2), (c), and (d)).

[0046] The pH of the liquid detergent composition of the present invention at 20°C is 8.5 or more, preferably 8.7 or more, more preferably 9.0 or more, and 11.0 or less, preferably 10.5 or less, more preferably 10.0 or less, from the viewpoints of sebum stain removal ability and liquid color stability at high temperatures. The pH is measured according to the pH measurement method described below. To adjust the pH to such a range, conventional acids such as sulfuric acid, hydrochloric acid, phosphoric acid, acetic acid, and lactic acid, and alkalis such as sodium hydroxide, potassium hydroxide, component (b1), and component (b2) can be used. <pH Measurement Method> A pH measurement composite electrode (glass-ground sleeve type, manufactured by HORIBA) is connected to a pH meter (pH / ion meter F-23, manufactured by HORIBA) and the power is turned on. A saturated aqueous potassium chloride solution (3.33 mol / L) is used as the internal solution of the pH electrode. Next, a 100 mL beaker is filled with a pH 4.01 standard solution (phthalate standard solution), a pH 6.86 (neutral phosphate standard solution), and a pH 9.18 standard solution (borate standard solution), and the beaker is immersed in a thermostatic bath at 20°C for 30 minutes. A pH measurement electrode is immersed in the thermostatically adjusted standard solution for 3 minutes, and calibration is performed in the order pH 6.86 → pH 9.18 → pH 4.01. The sample to be measured is adjusted to 20°C, and the electrode of the pH meter is immersed in the sample, and the pH is measured after 1 minute.

[0047] From the viewpoint of ease of handling, the viscosity of the liquid detergent composition of the present invention at 20°C is preferably 10 mPa·s or more, more preferably 30 mPa·s or more, even more preferably 50 mPa·s or more, and preferably 400 mPa·s or less, more preferably 300 mPa·s or less, even more preferably 200 mPa·s or less. These viscosities were measured using a Brookfield viscometer (Tokyo Keiki Co., Ltd., VISCOMETER MODEL DVM-B) with rotor No. 3 or 4, a rotation speed of 60 r / min, and a measurement time of 60 seconds. A rotor appropriate for the viscosity of the sample is selected, but if the measurable viscosity ranges overlap and different values ​​are obtained, the value of No. 3 shall be used.

[0048] The liquid detergent composition of the present invention can be suitably used for cleaning textile products. The fibers to be cleaned with the liquid detergent composition of the present invention may be either hydrophobic or hydrophilic. Examples of hydrophobic fibers include protein-based fibers (such as milk protein casein fiber and Promix), polyamide-based fibers (such as nylon), polyester-based fibers (such as polyester), polyacrylonitrile-based fibers (such as acrylic), polyvinyl alcohol-based fibers (such as vinylon), polyvinyl chloride-based fibers (such as polyvinyl chloride), polyvinylidene chloride-based fibers (such as vinylidene), polyolefin-based fibers (such as polyethylene and polypropylene), polyurethane-based fibers (such as polyurethane), polyvinyl chloride / polyvinyl alcohol copolymer-based fibers (such as polycrelal), polyalkylene paraoxybenzoate-based fibers (such as benzoate), polyfluoroethylene-based fibers (such as polytetrafluoroethylene), glass fibers, carbon fibers, alumina fibers, silicone carbide fibers, rock fibers, slag fibers, and metal fibers (gold thread, silver thread, steel fiber). Examples of hydrophilic fibers include seed fibers (cotton, cotton, kapok, etc.), bast fibers (hemp, flax, ramie, hemp, jute, etc.), leaf vein fibers (Manila hemp, sisal, etc.), palm fibers, rush, straw, animal hair fibers (wool, mohair, cashmere, camel hair, alpaca, vicuna, angora, etc.), silk fibers (domestic silk, wild silk), feathers, cellulosic fibers (rayon, polynosic, cupra, acetate, etc.), etc. From the viewpoint of more easily realizing the finish of fibers after washing with the liquid detergent composition of the present invention, it is preferable that the fibers contain cotton fibers. From the viewpoint of the finished quality of the fiber, the content of cotton fiber in the fiber is preferably 5% by mass or more, more preferably 10% by mass or more, even more preferably 15% by mass or more, still more preferably 20% by mass or more, still more preferably 40% by mass or more, still more preferably 60% by mass or more, still more preferably 80% by mass or more, and preferably 100% by mass or less, and may be 100% by mass.

[0049] In the present invention, the textile product means fabrics such as woven fabrics, knitted fabrics, and nonwoven fabrics using the hydrophobic fibers or hydrophilic fibers, and products obtained using the same, such as undershirts, T-shirts, dress shirts, blouses, slacks, hats, handkerchiefs, towels, knitwear, socks, underwear, and tights.

[0050] The liquid detergent composition of the present invention is suitable for washing textile products in water containing hardness components. The phrase "suitable for washing textile products in water containing hardness components" means that even when textile products are washed in water containing hardness components using the liquid detergent composition of the present invention, wrinkles on the textile products are reduced, the textile products have a clean appearance, and sebum stains adhering to the textile products can be removed.

[0051] In water containing hardness components used for washing, the water hardness is, from the viewpoint of the ability to clean sebum stains and to prevent wrinkles on fabrics, preferably 8° dH or more, more preferably 8.5° dH or more, even more preferably 9° dH or more, and preferably 20° dH or less, more preferably 17° dH or less, even more preferably 15° dH or less on the German hardness scale. Here, the German hardness (° dH) in this specification refers to the concentration of calcium and magnesium in water expressed as CaCO ３German hardness refers to the converted concentration of 1 mg / L (ppm) = approximately 0.056°dH (1°dH = 17.8 ppm). The calcium and magnesium concentrations for this German hardness are determined by chelate titration using disodium ethylenediaminetetraacetic acid. The specific method for measuring the German hardness of water in this specification is shown below. <Method for Measuring German Water Hardness> [Reagents] 0.01 mol / L EDTA 2Na solution: 0.01 mol / L aqueous solution of disodium ethylenediaminetetraacetate (titration solution, 0.01 M EDTA-2Na, manufactured by Sigma-Aldrich) Universal BT indicator (product name: Universal BT, manufactured by Dojindo Laboratories, Inc.) Ammonia buffer solution for hardness measurement (solution prepared by dissolving 67.5 g of ammonium chloride in 570 ml of 28 w / v% aqueous ammonia and adding ion-exchanged water to a total volume of 1000 ml) [Hardness Measurement] (1) Using a volumetric pipette, place 20 ml of sample water into a conical beaker. (2) Add 2 ml of ammonia buffer solution for hardness measurement. (3) Add 0.5 ml of Universal BT indicator. Confirm that the solution after addition is reddish purple. (4) While shaking the conical beaker well, add 0.01 mol / L EDTA 2Na solution dropwise from the burette, and the end point of the titration is when the sample water turns blue. (5) Calculate the total hardness using the following formula: Hardness (°dH) = T x 0.01 x F x 56.0774 x 100 / A T: Titration volume (mL) of 0.01 mol / L EDTA 2Na solution A: Sample volume (20 mL, volume of sample water) F: Factor of 0.01 mol / L EDTA 2Na solution

[0052] [Method for washing textile products] The present invention provides a method for washing textile products, which comprises washing textile products with a cleaning liquid containing (a) an anionic surfactant (hereinafter referred to as component (a)) containing an internal olefin sulfonate salt having from 16 to 24 carbon atoms (hereinafter referred to as component (a1)), (b1) an amine-based alkaline agent (hereinafter referred to as component (b1)), (b2) a carbonate-based alkaline agent (hereinafter referred to as component (b2)), and water, wherein the content of component (a1) in component (a) is from 70% by mass to 100% by mass and the pH is from 7.5 to 10.5.

[0053] In the textile cleaning method of the present invention, the cleaning liquid is preferably obtained by mixing the liquid detergent composition of the present invention with water. The cleaning liquid may further contain component (c). The cleaning liquid may further contain component (d). Component (a), component (a1), component (b1), component (b2), component (c), and component (d) are the same as those described for the liquid detergent composition of the present invention. The textile cleaning method of the present invention can be appropriately applied to the embodiments described for the liquid detergent composition of the present invention.

[0054] In the cleaning solution, the hardness of water mixed with the liquid detergent composition of the present invention is preferably 8° dH or more, more preferably 8.5° dH or more, even more preferably 9° dH or more, and preferably 20° dH or less, more preferably 17° dH or less, and even more preferably 15° dH or less, on the German hardness scale, from the viewpoint of wrinkle prevention and sebum stain removal properties of textile products. The cleaning solution may have a hardness within the above-mentioned range. In these textile cleaning methods of the present invention, the hardness of the cleaning solution is a value calculated using the "Method for Measuring German Water Hardness" described above. The hardness of the cleaning solution can be selected from the preferred range of water hardness containing hardness components described above for the liquid detergent composition of the present invention. The hardness of the cleaning solution can be measured in the same manner as for the water hardness described above. The hardness of water used in the cleaning method, such as water used to prepare the cleaning solution and water used for rinsing, can also be selected from the preferred range of water hardness containing hardness components described above for the liquid detergent composition of the present invention. The hardness of water can also be measured in the same manner as for the water hardness described above.

[0055] The content of component (a) in the cleaning solution is preferably 50 ppm or more, more preferably 80 ppm or more, even more preferably 120 ppm or more, and preferably 1500 ppm or less, more preferably 1200 ppm or less, even more preferably 900 ppm or less.

[0056] The content of the component (a1) in the cleaning liquid is preferably 50 ppm or more, more preferably 80 ppm or more, even more preferably 120 ppm or more, and preferably 1500 ppm or less, more preferably 1200 ppm or less, even more preferably 900 ppm or less.

[0057] The content of the component (b1) in the cleaning liquid is preferably 3 ppm or more, more preferably 5 ppm or more, even more preferably 8 ppm or more, and preferably 84 ppm or less, more preferably 75 ppm or less, even more preferably 57 ppm or less.

[0058] The content of the component (b2) in the cleaning liquid is preferably 3 ppm or more, more preferably 5 ppm or more, even more preferably 11 ppm or more, and preferably 126 ppm or less, more preferably 102 ppm or less, even more preferably 75 ppm or less.

[0059] In the cleaning liquid, it is preferable that the content of the component (a1) in the component (a), the mass ratio (b2) / [(b1)+(b2)] of the content of the component (b2) to the total content of the components (b1) and (b2), the mass ratio [(b1)+(b2)] / (a) of the total content of the components (b1) and (b2) to the content of the component (a), and the mass ratio [(b1)+(b2)] / (a1) of the total content of the components (b1) and (b2) to the content of the component (a1) are each in the same range as those of the liquid detergent composition of the present invention.

[0060] When the cleaning solution contains the component (c), the content of the component (c) in the cleaning solution is preferably 0.5 ppm or more, more preferably 1 ppm or more, even more preferably 1.5 ppm or more, and preferably 300 ppm or less, more preferably 150 ppm or less, even more preferably 30 ppm or less.

[0061] The temperature of the cleaning liquid is preferably 0°C or higher, more preferably 3°C or higher, and even more preferably 5°C or higher, from the viewpoint of further improving the cleaning properties of stains adhering to textile products, and is preferably 40°C or lower, more preferably 35°C or lower, from the viewpoint of not removing too much of the oil contained in the fibers themselves that make up the textile products, and making the textile products softer and with fewer wrinkles.

[0062] The pH of the cleaning solution at 20°C is 7.5 or more, preferably 7.8 or more, more preferably 8.0 or more, from the viewpoint of cleaning ability against sebum stains, and is 10.5 or less, preferably 10.0 or less, more preferably 9.5 or less, from the viewpoint of preventing damage to fibers and not impairing the finish. The pH of the cleaning solution can be measured in the same manner as the pH of the liquid detergent composition.

[0063] In recent years, washing machines have become larger, and the liquor ratio, which is the ratio of the mass of clothes (kg) to the volume of the washing solution (liters), i.e., the volume of washing solution (liters) / mass of clothes (kg) (hereinafter, this ratio may also be referred to as the liquor ratio), tends to decrease. When using a household washing machine, a small liquor ratio can increase friction between textile products due to agitation during washing, which can impair the finish quality of the textile products. The textile product washing method of the present invention can soften and cleanly finish textile products even under washing conditions with a small liquor ratio. From the viewpoint of softening and cleanly finishing textile products, the liquor ratio is preferably 2 or more, more preferably 3 or more, even more preferably 4 or more, and even more preferably 5 or more. From the viewpoint of maintaining detergency, the liquor ratio is preferably 45 or less, more preferably 40 or less, even more preferably 30 or less, and even more preferably 20 or less.

[0064] In the method for cleaning textile products of the present invention, the cleaning time is preferably 1 minute or more, more preferably 2 minutes or more, and even more preferably 3 minutes or more, from the viewpoint of cleaning sebum stains and preventing wrinkles in the textiles, and is preferably 1 hour or less, more preferably 30 minutes or less, even more preferably 20 minutes or less, and even more preferably 15 minutes or less, from the viewpoint of finishing the textile products softer.

[0065] The method for washing textile products of the present invention is suitable for a rotary washing method, a method in which textile products are immersed in a scouring solution while being fed by a roller or the like. The rotary washing method refers to a washing method in which textile products that are not fixed to a rotating device are rotated around a rotating shaft together with the washing solution. The rotary washing method can be performed using a rotary washing machine. Therefore, in the present invention, it is preferable to wash textile products using a rotary washing machine in order to achieve a cleaner finish for the textile products. Specific examples of rotary washing machines include drum washing machines, pulsator washing machines, and agitator washing machines. These rotary washing machines can be commercially available for home use.

[0066] Examples <Ingredients> The following ingredients were used in the examples and comparative examples. [Component (a)] a-1: internal olefin sulfonate sodium salt having 18 carbon atoms, component (a1) The mass ratio of the olefin form (sodium olefin sulfonate) to the hydroxy form (sodium hydroxyalkanesulfonate) in a-1 was 16 / 84. The mass ratio of the sulfonic acid group positions in the HAS form was as follows: 1st position / 2nd position / 3rd position / 4th position / 5th position / 6th to 9th position=1.5 / 22.1 / 17.2 / 21.8 / 13.5 / 23.9 (mass ratio) Furthermore, (IO-1S) / (IO-2S)=1.6 (mass ratio).

[0067] The positional distribution of sulfonic acid groups in the HAS form contained in the internal olefin sulfonate of a-1 and the mass ratio of the olefin form to the hydroxy form (HAS form) were measured using a high-performance liquid chromatograph mass spectrometer. Note that for internal olefin sulfonates in which a double bond exists at the 6th or higher position, the peaks overlapped and it was not possible to clearly separate them. The apparatus and analytical conditions used for the measurement were as follows: [Measurement equipment] LC device: "LC-20ASXR" (Shimadzu Corporation) LC-MS device: "LCMS-2020" (Shimadzu Corporation) Column: ODS Hypersil (length: 250 mm, inner diameter: 4.6 mm, particle size: 3 μm, Thermo Fisher Scientific) Detector: ESI (-), m / z = 349.15 (C18), 321.10 (C16), 293.05 (C14) [Solvent] Solvent A: 10 mM ammonium acetate aqueous solution Solvent B: 10 mM ammonium acetate added, acetonitrile / water = 95 / 5 solution [Elution conditions] Gradient: Solvent A 60%, Solvent B 40% (0 to 15 minutes) → Solvent A 30%, Solvent B 70% (15.1 to 20 minutes) → Solvent A 60%, Solvent B 40% (20.1 to 30 minutes) Flow rate: 0.5 ml / min Column temperature: 40°C Injection volume: 5 μl

[0068] a-2: Sodium lauryl sulfate, "Sodium Dodecyl Sulfate", manufactured by Tokyo Chemical Industry Co., Ltd. a-3: Polyoxyethylene (2) alkyl ether sodium sulfate, the alkyl group is a mixed alkyl group of lauryl and myristyl groups (mass ratio (lauryl group / myristyl group) = 72 / 28), the number in parentheses is the average number of moles of oxyethylene groups added, "EMAL 270J", manufactured by Kao Corporation a-4: Sodium alkylbenzenesulfonate, "Neopelex G-25", manufactured by Kao Corporation, purity 25%

[0069] [Component (b1)] b1-1: Monoethanolamine b1-2: Diethanolamine, manufactured by Fujifilm Wako Pure Chemical Industries, Ltd. b1-3: Triethanolamine, manufactured by Fujifilm Wako Pure Chemical Industries, Ltd. b1-4: Glycine, manufactured by Fujifilm Wako Pure Chemical Industries, Ltd.

[0070] [Component (b2)] b2-1: Potassium bicarbonate, manufactured by Fujifilm Wako Pure Chemical Industries, Ltd. b2-2: Sodium bicarbonate, manufactured by Fujifilm Wako Pure Chemical Industries, Ltd. b2-3: Potassium carbonate, manufactured by Fujifilm Wako Pure Chemical Industries, Ltd.

[0071] [Component (c)] c-1: Polypropylene glycol, weight average molecular weight 1000, manufactured by AGC Co., Ltd. [Component (d)] d-1: Fragrance composition [Water] Ion-exchanged water

[0072] <Preparation of Liquid Detergent Compositions> The liquid detergent compositions shown in Tables 1 and 2 were prepared using the above ingredients by the following method. A 5 cm long Teflon (registered trademark) stirrer piece was placed in a 200 mL glass beaker, and the mass was measured. Next, 20 g of ion-exchanged water and components (a1), (a), (b1), (b2), (c), and (d) were placed in the beaker, and while stirring at 100 rpm, potassium hydroxide or hydrochloric acid was added so that the pH of the composition reached the value shown in Tables 1 and 2. Ion-exchanged water was then added to bring the total weight to 100 g. The mixture was stirred at 100 rpm for 15 minutes to prepare the liquid detergent compositions. Note that the mass percentages of the ingredients in Tables 1 and 2 are all values ​​based on the active components.

[0073] <Evaluation of Liquid Color Stability at High Temperatures> After preparation of each liquid detergent composition, 5 g was placed in a cuvette and measured using a colorimeter (Z-300A, manufactured by Nippon Denshoku Co., Ltd.) with transmitted light at a wavelength of 550 nm, and the liquid color was recorded as a b value. Next, 20 g of each liquid detergent composition after preparation (before storage) was taken and transferred to a No. 6 glass standard bottle and placed in a constant temperature bath at 50°C for storage for one week. After storage, 5 g of each liquid detergent composition was placed in a cuvette and the b value was recorded in the same manner as before storage, and the difference Δb was evaluated as the liquid color stability at high temperatures. The results are shown in Tables 1 and 2. A smaller Δb indicates better liquid color stability at high temperatures.

[0074] <Evaluation of Low-Temperature Storage Stability> After preparation, 25 g of each liquid detergent composition was transferred to a No. 6 standard glass bottle, the bottle was capped, and the bottle was placed in a thermostatic chamber at 5°C. The bottle was left to stand and visually observed, and the time required for the liquid to become cloudy was evaluated according to the following criteria. The results are shown in Tables 1 and 2. Rank A: 3 hours or more Rank B: 1 hour or more but less than 3 hours Rank C: Less than 1 hour

[0075] <Evaluation of Sebum Stain Cleaning Property> (1) Preparation of Model Artificially Stained Cloth A model artificially stained cloth was prepared by applying a model artificially stained cloth with the following composition to a cloth. The application of the model artificially stained cloth to the cloth was carried out by printing the artificially stained cloth on the cloth using a gravure roll coater. The process of applying the model artificially stained cloth to the cloth and preparing the model artificially stained cloth was carried out using a gravure roll with a cell capacity of 58 cm. ３ / m ２ The test was carried out at a coating speed of 1.0 m / min, a drying temperature of 100°C, and a drying time of 1 min. Cotton 2003 (manufactured by Tanigashira Shoten) was used as the cloth. Composition of model artificial sebum contamination solution: lauric acid 0.4% by mass, myristic acid 3.1% by mass, pentadecanoic acid 2.3% by mass, palmitic acid 6.2% by mass, heptadecanoic acid 0.4% by mass, stearic acid 1.6% by mass, oleic acid 7.8% by mass, triolein 13.0% by mass, n-hexadecyl palmitate 2.2% by mass, squalene 6.5% by mass, egg white lecithin liquid crystal 1.9% by mass, Kanuma red clay 8.1% by mass, carbon black 0.01% by mass, balance water (total 100% by mass)

[0076] (2) Measurement of Detergency Four sheets of the model sebum-artificially soiled cloth (6 cm x 6 cm) prepared above were washed for 20 minutes at 60 rpm in a Tergotometer (MS-8212, manufactured by Ueshima). The washing conditions were as follows: 1 L of water (the water was adjusted to a Ca / Mg ratio of 6 / 4 (by mass) using ion-exchanged water, calcium chloride, and magnesium chloride, with a German hardness of 14° dH, and the water temperature was adjusted to 30°C) was poured into the cloth so that each liquid detergent composition shown in Tables 1 and 2 was present at 2 g / L, and the water temperature was adjusted to 30°C. After washing, the cloth was rinsed with city water (20°C) for 3 minutes. The rinsed soiled cloth was then dehydrated for 1 minute using a two-layer washing machine and then left to dry for 12 hours under conditions of 20°C and 43% RH. Detergency was evaluated based on detergency. Detergency (%) was measured using the method described below, and the average value of the four sheets was calculated. The reflectance at a wavelength of 550 nm of the original fabric before soiling and the artificially soiled fabric before and after washing was measured using a colorimeter (Z-300A, manufactured by Nippon Denshoku Co., Ltd.). Detergency (%) = 100 × [(reflectance of artificially soiled fabric after washing - reflectance of artificially soiled fabric before washing) / (reflectance of original fabric - reflectance of artificially soiled fabric before washing)] The improvement rate (%) in detergency of the liquid detergent composition of each Example and Comparative Example was calculated using the following formula. The results are shown in Tables 1 and 2. Improvement rate (%) in detergency = 100 × [(detergency (%) of each example - detergency (%) of Comparative Example 8) / (detergency (%) of Comparative Example 8 - detergency (%) of Comparative Example 9)]. The above formula is calculated based on the difference between the detergency (18.0%) of Comparative Example 9, which contains the component (a1) of the present invention but does not contain the components (b1) and (b2), and the detergency (24.2%) of Comparative Example 8, in which the pH was adjusted to 9.6 by adding potassium hydroxide, a strong alkaline agent, to Comparative Example 9. The higher the improvement rate (%) in detergency, the better the ability to clean sebum stains.

[0077] <Evaluation of Wrinkle Resistance> (1) Pretreatment Method for Fabric Used for Wrinkle Evaluation 1.7 kg of cotton broadcloth (manufactured by Tanigashira Shoten) was washed twice cumulatively using the standard cycle of a fully automatic washing machine (National NA-F702P) (4.7 g of Emulgen 108 (manufactured by Kao Corporation) during washing, 47 L of water, 9 minutes of washing, 2 rinses, and 3 minutes of spin-drying), and then washed three times cumulatively using water only (47 L of water, 9 minutes of washing, 2 rinses, and 3 minutes of spin-drying), and then dried for 24 hours in an environment of 23°C and 45% RH. The fabric was then cut into a size of 30 cm x 60 cm, and the short ends were joined together and sewn with a folding sewing machine. This was used as the 30 cm x 30 cm evaluation fabric. Ten T-shirts (manufactured by Uniqlo, 100% cotton) were washed twice in a fully automatic washing machine (manufactured by National NA-F702P) on the standard cycle (using 4.7 g of Emulgen 108 (manufactured by Kao Corporation) in 47 L of water, washing for 9 minutes, rinsing twice, and spin-drying for 3 minutes), and then washed three times in water only (47 L of water, washing for 9 minutes, rinsing twice, and spin-drying for 3 minutes), and then dried for 24 hours in an environment of 23°C and 45% RH. This was used as a control fabric.

[0078] (2) Wrinkle Evaluation Method 4.0 L of hard water (12° dH, prepared by adding only calcium chloride to ion-exchanged water) was poured into an electric bucket washing machine (National, model number "N-BK2"). 4 g of each liquid detergent composition was added to the water in the washing machine and stirred for 1 minute. Then, one cotton broadcloth test fabric and one T-shirt conditioning cloth pretreated by the above method were added and washed for 10 minutes. After washing, the fabric was dehydrated for 1 minute using a two-tier washing machine (Hitachi, model number "PS-H35L"). Next, 4.0 L of the hard water was poured into the bucket washing machine, and the test fabric and conditioning cloth after dehydration were added and rinsed for 3 minutes. Then, the same dehydration treatment was carried out for 1 minute using the two-tier washing machine. After this rinsing treatment was performed a total of two times, the cotton broadcloth fibers for evaluation were taken, reshaped, lightly shaken and cut 10 times, and then hung to dry for 24 hours in an environment of 25°C and 45% RH. After drying, the wrinkle state of each evaluation fiber was compared with that of the evaluation fiber of Comparative Example 8 by six experienced judges and scored according to the following criteria: -1 point: worse than Comparative Example 8 0 point: equivalent to Comparative Example 8 1 point: slightly better than Comparative Example 8 2 points: better than Comparative Example 8 The average of the six evaluation values ​​was calculated and judged according to the following criteria. The results are shown in Tables 1 and 2. Rank A: average value of 0 or more Rank B: average value of -0.5 or more and less than 0 Rank C: average value less than -0.5

[0079]

[0080]

Claims

1. A liquid detergent composition comprising (a) an anionic surfactant containing an internal olefin sulfonate having 16 to 24 carbon atoms (hereinafter referred to as component (a1)), (b1) an amine-based alkaline agent (hereinafter referred to as component (b1)), (b2) a carbonate-based alkaline agent (hereinafter referred to as component (b2)), and water, wherein the content of component (a1) in component (a) is 70% by mass or more and 100% by mass or less, and the pH at 20°C is 8.5 or more and 11.0 or less.

2. The liquid cleaning composition according to claim 1, wherein the mass ratio (b2) / [(b1)+(b2)] of the content of component (b2) to the total content of component (b1) and component (b2) in the liquid cleaning composition is 0.1 or more and 0.83 or less.

3. The liquid cleaning composition according to claim 1 or 2, wherein the mass ratio of the total content of component (b1) and component (b2) to the content of component (a) [(b1) + (b2)] / (a) is 0.13 or more and 0.65 or less.

4. (a1) A liquid detergent composition according to claim 1 or 2, comprising an internal olefin sulfonate (IO-1S) in which a sulfonic acid group is located at position 2 to 4 and an internal olefin sulfonate (IO-2S) in which a sulfonic acid group is located at position 5 or higher, wherein the mass ratio of the content of (IO-1S) to the content of (IO-2S), (IO-1S) / (IO-2S), is 0.5 or more and 10 or less.

5. (b1) The liquid detergent composition according to claim 1 or 2, wherein the component is one or more selected from alkanolamines and amino acids.

6. (b1) The liquid detergent composition according to claim 1 or 2, wherein the component is one or more selected from monoethanolamine, diethanolamine, triethanolamine, and glycine.

7. (b) The liquid detergent composition according to claim 1 or 2, wherein the component is one or more selected from sodium carbonate, potassium carbonate, sodium sesquicarbonate, potassium sesquicarbonate, sodium bicarbonate, and potassium bicarbonate.

8. A liquid detergent composition according to claim 1 or 2, for use in cleaning textile products.

9. The liquid detergent composition according to claim 8, for washing textile products in water with a hardness of 8°dH or more and 20°dH or less.

10. A method for washing textile products, comprising: (a) an anionic surfactant containing an internal olefin sulfonate with 16 to 24 carbon atoms (hereinafter referred to as component (a1)) (hereinafter referred to as component (a)); (b1) an amine-based alkaline agent (hereinafter referred to as component (b1)); (b2) a carbonate-based alkaline agent (hereinafter referred to as component (b2)); and water, wherein the content of component (a1) in component (a) is 70% by mass or more and 100% by mass or less, and the pH is 7.5 or more and 10.5 or less.

11. The method for cleaning textile products according to claim 10, wherein the mass ratio (b2) / [(b1)+(b2)] of the content of component (b2) to the total content of component (b1) and component (b2) in the cleaning solution is 0.1 or more and 0.83 or less.

12. The method for cleaning textile products according to claim 10 or 11, wherein the mass ratio of the total content of component (b1) and component (b2) to the content of component (a) in the cleaning solution, [(b1) + (b2)] / (a), is 0.13 or more and 0.65 or less.

13. The method for cleaning textile products according to claim 10 or 11, wherein the cleaning solution is obtained by mixing the liquid cleaning agent composition according to claim 1 or 2 with water.

14. The method for cleaning textile products according to claim 10 or 11, wherein the hardness of the cleaning solution is 8°dH or more and 20°dH or less.