Liquid detergent composition for textile products and washing method

Abstract

To provide a liquid detergent composition for textile products, which suppresses fading of a material to be washed and is excellent in low-temperature stability.SOLUTION: The liquid detergent composition for textile products contains (A) a component (A) which is a surfactant (excluding soap) containing a nonionic surfactant (A1) and a non-soap anionic surfactant (A2), and (B) a polyethylene glycol having an average molecular weight of 10,000 or more. The content of ingredient (A) is less than 50% by mass relative to the total mass of the liquid detergent composition for textile products, the content of ingredient (A2) is 5% by mass or more relative to the total mass of the liquid detergent composition for textile products, and the content of ingredient (B) is 0.01 to 10% by mass relative to the total mass of the liquid detergent composition for textile products.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to a liquid detergent composition for textile products and a method for washing textile products using the liquid detergent composition for textile products. [Background technology]

[0002] When textile products such as clothing are washed, the textile products may become fuzzy, pill, etc., resulting in a deterioration in the quality of the washed products. To prevent such a deterioration in quality, liquid detergent compositions for textile products containing cellulase, amidoamine, etc. have been proposed. For example, Patent Document 1 discloses a textile treatment agent containing a nonionic surfactant, cellulase, and amidoamine, while Patent Document 2 discloses a detergent for textiles containing a specific polymer, amidoamine, and water-insoluble silicone. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] International Publication No. 2014 / 077403 [Patent Document 2] Japanese Patent Application Laid-Open No. 2015-127369 Summary of the Invention [Problem to be solved by the invention]

[0004] However, depending on the type of laundry, preventing color fading may be important. In addition, a liquid detergent composition for textile products is required to be less susceptible to deterioration over time (precipitation and gelation of components) during storage (excellent liquid stability). The precipitation and gelation of components are more likely to occur at lower storage temperatures, so it is desirable for the composition to have excellent liquid stability even when stored at low temperatures (excellent low-temperature stability). The present invention aims to provide a liquid detergent composition for textile products that suppresses color fading of the washed items and has excellent low-temperature stability. [Means for solving the problem]

[0005] The present invention has the following aspects. [1] A liquid detergent composition for textile products, comprising: component (A), which is a surfactant (excluding soap) containing the following component (A1) and the following component (A2); and component (B), wherein the content of component (A) is less than 50% by mass relative to the total mass of the liquid detergent composition for textile products; the content of component (A2) is 5% by mass or more relative to the total mass of the liquid detergent composition for textile products; and the content of component (B) is 0.01 to 10% by mass relative to the total mass of the liquid detergent composition for textile products. Component (A1): Nonionic surfactant. (A2) Component: Non-soap anionic surfactant. (B) Component: Polyethylene glycol with an average molecular weight of 10,000 or more. [2] The liquid detergent composition for fabric products according to [1], wherein (A1) / (B), which represents the mass ratio of the content of the (A1) component to the content of the (B) component, is 1 to 4500. [3] A washing method comprising a washing step of contacting a textile product with a washing liquid containing the liquid detergent composition for textile products according to [1] or [2] above, wherein the content of the (B) component relative to the total mass of the washing liquid is 0.03 to 10 ppm. [Effects of the Invention]

[0006] According to the present invention, a liquid detergent composition for textile products can be obtained which inhibits color fading of the washed items and has excellent low-temperature stability. DETAILED DESCRIPTION OF THE INVENTION

[0007] (Liquid detergent composition for textile products) The liquid detergent composition for fabric products of the present invention (hereinafter also simply referred to as a liquid detergent composition) contains component (A) and component (B). In this specification, a numerical range expressed by "to" means a numerical range in which the numbers before and after "to" are the lower and upper limits.

[0008] Component (A) Component (A) is a surfactant other than soap (non-soap surfactant). The liquid detergent composition exhibits excellent detergency by including component (A). Soap is a higher fatty acid and its salt, which will be described later. Component (A) contains at least component (A1), which is a nonionic surfactant, and component (A2), which is a non-soap anionic surfactant, and may further contain any surfactant such as a cationic surfactant, an amphoteric surfactant, or a semi-polar surfactant.

[0009] <Component (A1)> The component (A1) is a nonionic surfactant. By including the component (A1), the liquid detergent composition can further enhance its detergency. Examples of component (A1) include polyoxyalkylene-type nonionic surfactants, Guerbet alcohol-type nonionic surfactants, alkylphenols, alkylene oxide adducts of fatty acids having 8 to 22 carbon atoms or amines having 8 to 22 carbon atoms, polyoxyethylene polyoxypropylene block copolymers, fatty acid alkanolamides, polyhydric alcohol fatty acid esters or their alkylene oxide adducts, alkylene oxide adducts of hydrogenated castor oil, sugar fatty acid esters, N-alkyl polyhydroxy fatty acid amides, and alkyl glycosides. The component (A1) may be one type alone, or a combination of two or more types.

[0010] As the component (A1), polyoxyalkylene-type nonionic surfactants and Guerbet alcohol-type nonionic surfactants are preferred. As the polyoxyalkylene type nonionic surfactant, a compound represented by the following formula (A11) (hereinafter also referred to as "component (A11)") and a compound represented by the following formula (A12) (hereinafter also referred to as "component (A12)") are more preferred, with component (A11) being even more preferred. As the Guerbet alcohol-type nonionic surfactant, a compound represented by the following formula (A13) (hereinafter also referred to as "component (A13)") is more preferred.

[0011] R 32 -O-[(EO) p1 / (A 1 O) q1 ]-(EO) r1 -R 33 (A11)

[0012] [(A11), where R 32 is a hydrocarbon group having 7 to 22 carbon atoms, and R 33 is a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, or an alkenyl group having 2 to 6 carbon atoms; EO is an oxyethylene group; p1 is a number from 3 to 25 representing the average number of repetitions of EO; r1 is a number from 0 to 20 representing the average number of repetitions of EO; A 1 O represents at least one of PO (oxypropylene group) and BO (oxybutylene group), and q1 represents A 1 It is a number between 0 and 20 that indicates the average number of repeating O's.

[0013] R 32 The hydrocarbon group has 7 to 22 carbon atoms, preferably 10 to 22, more preferably 10 to 20, still more preferably 10 to 18, and particularly preferably 12 to 18. 32 R may be linear or branched. 32 may be a straight-chain hydrocarbon group, or may be a group selected from a branched-chain primary hydrocarbon group and a straight-chain secondary hydrocarbon group. R 33 is preferably a hydrogen atom or an alkyl group having 1 to 3 carbon atoms, more preferably a hydrogen atom.

[0014] R 32 When q1 is a linear hydrocarbon group, p1+r1 is preferably 3 to 30, more preferably 5 to 18, and even more preferably 7 to 15. Two or more groups having different p1+r1 values ​​may be used in combination. When used in combination, it is preferable to combine one with a relatively small p1+r1 value of 5 to 9 and one with a relatively large p1+r1 value of 12 to 18. q1 is preferably a number of 0 to 6, and more preferably 0 to 3. When a component (A11-1) in which p1+r1 is 5 to 9 is used in combination with a component (A11-2) in which p1+r1 is 12 to 18, the mass ratio of component (A11-1) / component (A11-2) is preferably 1.0 to 10, more preferably 1.4 to 4, and even more preferably 1.5 to 3.5. R 32 is preferably a linear hydrocarbon group, since this further enhances the effect of inhibiting color fading. R 32 When is a group selected from a branched chain primary hydrocarbon group and a straight chain secondary hydrocarbon group, p1+r1 is preferably 3 to 10, and q1 is preferably 0.

[0015] In formula (A11), when r1 is 0, p1 is preferably 4 to 20, more preferably 5 to 16, and even more preferably 6 to 10. q1 is preferably 0 to 4, more preferably 0 to 2, and even more preferably 0. When r1 is 1 or more, p1 is preferably 4 to 16, more preferably 6 to 12, and further preferably 8 to 10. q1 is preferably 1 to 4, and more preferably 2 or 3. r1 is preferably 4 to 16, more preferably 6 to 12, and further preferably 8 to 10. If q1 is 1 or greater, then [(EO) p1 / (A 1 O) q1 In the formula (I), there is no particular limitation on the distribution (arrangement order) of EO and PO, EO and BO, or EO, ​​PO and BO, and they may be arranged in a block form or randomly. The average number of repetitions can be measured by gas chromatography or the like.

[0016] R 34 -X 1 -[(EO) p2 / (A 2 O) q2 ]-(EO) r2 -R 35 (A12)

[0017] [(A12), where R 34 is a hydrocarbon group having 7 to 22 carbon atoms, -X 1- is -COO- or -CONH-, and R 35 is a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, or an alkenyl group having 2 to 6 carbon atoms; EO is an oxyethylene group; p2 is a number of 3 to 25 indicating the average number of repetitions of EO; A 2 O represents at least one of PO (oxypropylene group) and BO (oxybutylene group), and q2 represents A 2 is a number between 0 and 6 indicating the average number of repeats of O, and r2 is a number between 0 and 20 indicating the average number of repeats of EO.

[0018] R 34 The hydrocarbon group has 7 to 22 carbon atoms, preferably 9 to 19 carbon atoms, and more preferably 11 to 17 carbon atoms. 34 R may be linear or branched. 34 may be a straight-chain hydrocarbon group, or may be a group selected from a branched-chain primary hydrocarbon group and a straight-chain secondary hydrocarbon group. -X 1 As -, -COO- is preferred. R 35 is preferably a hydrogen atom or an alkyl group having 1 to 3 carbon atoms, more preferably an alkyl group having 1 to 2 carbon atoms. When r2 is 0, p2 is preferably 6 to 22, more preferably 9 to 20, and even more preferably 12 to 18. q2 is preferably 0 to 4, more preferably 0 to 2, and even more preferably 0. When r2 is 1 or more, p2 is preferably 4 to 16, more preferably 6 to 12, and still more preferably 8 to 10. q2 is preferably 1 to 4, and more preferably 2 or 3. r2 is preferably 4 to 16, more preferably 6 to 12, and still more preferably 8 to 10. If q2 is 1 or greater, then [(EO) p2 / (A 2 O) q2 In the formula (I), there is no particular limitation on the distribution (arrangement order) of EO and PO, EO and BO, or EO, ​​PO and BO, and they may be arranged in a block form or randomly.

[0019] The component (A12) is preferably a polyoxyethylene fatty acid alkyl ester. (The component (A12) is preferably a polyoxyethylene fatty acid alkyl ester.) 34 is an alkyl group having 11 carbon atoms and an alkyl group having 13 carbon atoms, -X 1 - is -COO-, and R 35 is a methyl group, p2=15, q2=0, and r2=0 (hereinafter, sometimes referred to as MEE).

[0020] R 36 -CHR 37 -CH2-O-(R 38 O) p3 -H (A13)

[0021] [(A13), where R 36 and R 37 are each independently a chain monovalent hydrocarbon group, and R 36 and R 37 The total number of carbon atoms is 6 to 16, and R 38 is a hydrocarbon group having 1 to 4 carbon atoms, and p3 is R 38 The number is a number between 1 and 20 indicating the average number of repeats of O.

[0022] R 36 and R 37 are each independently a linear monovalent hydrocarbon group. 36 and R 37 The total number of carbon atoms is 6 to 16, preferably 6 to 14, more preferably 6 to 14, and even more preferably 6 to 10. R 36 and R 37 The chain-like monovalent hydrocarbon group in may be linear or branched. The chain-like monovalent hydrocarbon group may or may not have an unsaturated bond. The chain-like monovalent hydrocarbon group is preferably an alkyl group or an alkenyl group. R 36 The number of carbon atoms and R 37 If the number of carbon atoms is different from that of R 36 and R 37 The one having the fewer carbon atoms preferably has 2 to 7 carbon atoms, and the one having the greater carbon atom preferably has 4 to 14 carbon atoms.

[0023] R 36 -CHR 37 -CH2- is Guerbet alcohol (R 36 -CHR 37 It is a residue obtained by removing one hydroxyl group from R 36 -CHR 37 -CH2- is R 36 -CH(R 37 )-CH2-. Guerbet alcohol is an alcohol obtained by subjecting raw material alcohol to the Guerbet reaction. In the Guerbet reaction, two raw material alcohol molecules are condensed to form a dimer. For example, if the raw material alcohol is R 39 -CH2-CH2-OH (where R 39 is a linear monovalent hydrocarbon group having 2 to 7 carbon atoms. 39 -CH2-CH2-CHR 39 Guerbet alcohol, represented by -CH2-OH, is obtained. The two molecules of raw alcohol that form Guerbet alcohol may be different. When the two molecules of raw alcohol are the same, R 36 The number of carbon atoms and R 37 The difference in the number of carbon atoms is 2. R 36 -CHR 37 Specific examples of -CH2- include a 2-ethylhexyl group and a 2-propylheptyl group.

[0024] p3 is 1 to 20, preferably 3 to 14, more preferably 4 to 12, and even more preferably 5 to 10. When p3 is at least the lower limit, the cleaning power and low-temperature stability are excellent. When p3 is at most the upper limit, the low-temperature stability is excellent.

[0025] R 38 is a hydrocarbon group having 1 to 4 carbon atoms. 38 is preferably an alkylene group having 1 to 4 carbon atoms, more preferably an alkylene group having 2 to 3 carbon atoms, and even more preferably an alkylene group having 2 carbon atoms. 38O is preferably at least one of EO and PO, and more preferably EO.

[0026] (R 38 O) p3 EO and PO may be mixed in the above. When EO and PO are mixed, there is no particular limitation on their distribution (arrangement order), and they may be arranged in a block pattern or randomly.

[0027] Examples of the component (A13) include 2-ethylhexyl alcohol alkoxylates such as 2-ethylhexyl alcohol ethoxylate, and 2-propylheptyl alcohol alkoxylates such as 2-propylheptyl alcohol ethoxylate. Of these, 2-propylheptyl alcohol ethoxylate is preferred as the component (A13). In the component (A13), the average number of moles of ethylene oxide added is preferably 3 to 14, more preferably 4 to 12, and even more preferably 5 to 10.

[0028] The component (A13) may be a commercially available product, or may be produced by a known production method. For example, commercially available products of 2-ethylhexyl alcohol ethoxylate include "Newcol 1008" manufactured by Nippon Nyukazai Co., Ltd., and "Lutensol XP-100," "Lutensol XP-80," and "Lutensol XP-50" manufactured by BASF. One example of a method for producing component (A13) is to add 1 to 20 moles of alkylene oxide to Guerbet alcohol having 8 to 18 carbon atoms. The Guerbet alcohol may be produced by subjecting the raw material alcohol described above to a Guerbet reaction, or a commercially available product. For example, 2-propylheptyl alcohol can be obtained by subjecting pentanol to a Guerbet reaction.

[0029] <(A2) component> Component (A2) is a non-soap anionic surfactant. Examples of component (A2) include carboxylic acid-type anionic surfactants such as linear alkylbenzenesulfonic acid or its salt (LAS), α-olefinsulfonic acid or its salt (AOS), linear or branched alkyl sulfate ester or its salt (AS), polyoxyalkylene alkyl(alkenyl) ether sulfate ester or its salt (AES), alkyl group-containing alkanesulfonic acid or its salt, α-sulfofatty acid ester or its salt, internal olefinsulfonic acid or its salt (IOS), hydroxyalkanesulfonic acid or its salt (HAS), alkyl ether carboxylic acid or its salt, polyoxyalkylene ether carboxylic acid or its salt, alkylamide ether carboxylic acid or its salt, alkenylamide ether carboxylic acid or its salt, and acylaminocarboxylic acid or its salt; and phosphate ester-type anionic surfactants such as alkyl phosphate ester or its salt, polyoxyalkylene alkyl phosphate ester or its salt, polyoxyalkylene alkylphenyl phosphate ester or its salt, and glycerin fatty acid ester monophosphate ester or its salt. Examples of salt forms of component (A2) include alkali metal salts (sodium salt, potassium salt, etc.), alkaline earth metal salts (magnesium salt, etc.), and alkanolamine salts (monoethanolamine salt, diethanolamine salt, etc.). These components (A2) may be used alone or in combination of two or more.

[0030] ≪(B) Component≫ Component (B) is a polyethylene glycol with an average molecular weight of 10,000 or more. Those with a higher molecular weight are also called polyethylene oxide. Component (B) contributes to preventing the color of the washed items from fading. The average molecular weight of component (B) is preferably 10,000 to 5,000,000, more preferably 20,000 to 4,800,000, more preferably 30,000 to 3,800,000, and particularly preferably 150,000 to 2,200,000. When the average molecular weight of component (B) is equal to or greater than the lower limit, the anti-fading effect can be further enhanced. When the average molecular weight of component (B) is equal to or less than the upper limit, the low-temperature stability can be further enhanced.

[0031] In this specification, the average molecular weight of component (B) is a viscosity average molecular weight. The viscosity average molecular weight can be determined by the method described in "Some Properties of Poly(ethylene oxide) in Aqueous Solution," by F.E. Bailey, Jr., and R.W. Callard, Journal of Applied Polymer Science, Volume 1, Issue No. 1, pp. 56-62, 1959.

[0032] The component (B) may be a commercially available product or may be produced by a known production method. Examples of commercially available products include highly polymerized polyethylene glycols such as those manufactured by Dow Chemical Company under the trade names "Polyox WSRN-12K," "Polyox WSRN-60K," and "Polyox WSR-301," and grades PEO-18, PEO-15, PEO-8, PEO-4, PEO-3, PEO-2, and PEO-1 of the trade name "Polyethylene Oxide" manufactured by Sumitomo Seika Chemicals Co., Ltd.

[0033] ≪Content≫ The content of component (A) is less than 50% by mass, preferably 25 to 49% by mass, more preferably 32 to 49% by mass, and even more preferably 34 to 49% by mass, based on the total mass of the liquid detergent composition. When the content of component (A) is less than 50% by mass, both a good color fading suppression effect and good low-temperature stability are likely to be obtained. When the content of component (A) is equal to or greater than the above lower limit, detergency can be further improved.

[0034] The content of component (A1) is preferably 20% by mass or more but less than 45% by mass, more preferably 22 to 40% by mass, and even more preferably 24 to 35% by mass, based on the total mass of the liquid detergent composition. When the content of component (A1) is equal to or greater than the above-mentioned lower limit, detergency can be further enhanced. When the content of component (A1) is equal to or less than the above-mentioned upper limit, low-temperature stability can be further enhanced.

[0035] The component (A1) preferably contains one or both of the components (A11) and (A12). The combined amount of the components (A11) and (A12) relative to the total mass of the component (A1) may be, for example, 50 mass% or more, 60 mass% or more, 70 mass% or more, 80 mass% or more, 90 mass% or more, or 95 mass% or more. It may even be 100 mass%. It is more preferable that the (A1) component contains at least the (A11) component. It may further contain the (A12) component. (A11) / (A11+A12), which represents the ratio of the content of the (A11) component to the total content of the (A11) component and the (A12) component, is preferably 20% by mass or more, more preferably 22% by mass or more, and even more preferably 24% by mass or more. It may even be 100% by mass.

[0036] The content of component (A2) is preferably 5% by mass or more, more preferably 5 to 20% by mass, and even more preferably 10 to 15% by mass, based on the total mass of the liquid detergent composition. When the content of component (A2) is equal to or greater than the above-mentioned lower limit, low-temperature stability can be further improved. When the content of component (A2) is equal to or less than the above-mentioned upper limit, the color fading suppression effect can be further improved. Component (A2) preferably contains one or both of LAS and AES. The total content of LAS and AES relative to the total mass of component (A2) may be, for example, 50 mass% or more, 60 mass% or more, 70 mass% or more, 80 mass% or more, 90 mass% or more, or 95 mass% or more. It may even be 100 mass%. The (A2) component preferably contains at least an LAS, and may further contain an AES component. The ratio of the LAS content to the total content of the LAS and AES components, LAS / (LAS+AES), is preferably 50% by mass or more, more preferably 60% by mass or more, and even more preferably 70% by mass or more. It may even be 100% by mass.

[0037] In the liquid detergent composition, (A1) / (A2), which represents the mass ratio of the content of component (A1) to the content of component (A2), is preferably 1 to 10, more preferably 1.4 to 4, and even more preferably 1.5 to 3.5. When (A1) / (A2) is at least the above lower limit, the detergency can be further improved. When (A1) / (A2) is not more than the above upper limit, the low-temperature stability can be further improved.

[0038] The combined amount of components (A1) and (A2) relative to the total mass of component (A) may be, for example, 50 mass% or more, 60 mass% or more, 70 mass% or more, 80 mass% or more, 90 mass% or more, or 95 mass% or more, or may even be 100 mass%.

[0039] In order to further enhance the color fading suppression effect, it is preferable that the liquid detergent composition contains substantially no cationic surfactant, or if it contains any cationic surfactant, it contains only a small amount of cationic surfactant. In this specification, the term "substantially free" means that the substance is not actively blended, except for those that are unintentionally contained. For example, the content of the cationic surfactant is preferably 5% by mass or less, more preferably 3% by mass or less, and even more preferably 1% by mass or less, relative to the total mass of the liquid detergent composition. It may even be zero.

[0040] The content of component (B) is 0.01 to 10% by mass based on the total mass of the liquid detergent composition. If the average molecular weight of component (B) is high, the effect of inhibiting color fading is enhanced, but if the average molecular weight exceeds 3,000,000, it becomes difficult to incorporate a large amount into the liquid detergent composition. When the average molecular weight of component (B) is 10,000 to less than 3,000,000, the amount of component (B) relative to the total mass of the liquid detergent composition is preferably 0.01 to 5 mass%, more preferably 0.05 to 1 mass%, and even more preferably 0.1 to 0.5 mass%. When the average molecular weight of component (B) is 3,000,000 or more, the blending amount of component (B) relative to the total mass of the liquid detergent composition is preferably 0.01 to 0.1 mass %, more preferably 0.01 to 0.05 mass %. When the content of component (B) is within the above range, the effect of inhibiting discoloration and low-temperature stability are improved.

[0041] In the liquid detergent composition, (A1) / (B), which represents the mass ratio of the content of component (A1) to the content of component (B), is preferably 1 to 4500, more preferably 200 to 4000, and even more preferably 300 to 3500. When (A1) / (B) is at least the above lower limit, low-temperature stability can be further improved. When (A1) / (B) is not more than the above upper limit, the color fading suppression effect can be further improved.

[0042] In the liquid detergent composition, (A1+A2) / (B), which represents the mass ratio of the total content of components (A1) and (A2) to the content of component (B), is preferably 200 to 5,000, more preferably 300 to 4,000, and even more preferably 400 to 3,000. When (A1+A2) / (B) is at least the above lower limit, low-temperature stability can be further improved. When (A1+A2) / (B) is not more than the above upper limit, the color fading suppression effect can be further improved.

[0043] <Other optional ingredients> The liquid detergent composition may contain components (optional components) other than the components (A) and (B). The optional components may be used alone or in combination of two or more. Optional components include water, water-miscible organic solvents, higher fatty acids or salts thereof, sequestering agents, antibacterial agents, enzymes, pH adjusters, viscosity reducers and solubilizers, structuring agents, thickeners other than structuring agents, preservatives, antioxidants, enzyme stabilizers, texture improvers, dye transfer inhibitors, dispersants, soiling inhibitors, fragrances, emulsifying agents, fluorescent agents, discoloration inhibitors, hydrotropes, bleaching agents, pearlescent agents, extracts of natural products, and the following component (C), etc. Known compounds can be appropriately selected and used for these.

[0044] <Water> Water contributes to improving low-temperature stability. The water content is preferably more than 20% by mass, more preferably more than 20% by mass and not more than 50% by mass, even more preferably 25 to 40% by mass, and particularly preferably 30 to 40% by mass, relative to the total mass of the liquid detergent composition, in view of its excellent effect of improving low-temperature stability.

[0045] <Sequestering agent> Examples of sequestering agents include organic chelating agents. Specific examples include organic phosphonic acid derivatives such as citric acid, lactic acid, tartaric acid, oxalic acid, malic acid, gluconic acid, nitrilotriacetic acid, iminodiacetic acid, ethylenediaminetetraacetic acid, diethylenetriaminepentaacetic acid, glycoletherdiaminetetraacetic acid, hydroxyethyliminodiacetic acid, triethylenetetraaminehexaacetic acid, ethane-1,1-diphosphonic acid, ethane-1,1,2-triphosphonic acid, trisodium methylglycinediacetate, 1-hydroxyethane-1,1-diphosphonic acid, ethanehydroxy-1,1,2-triphosphonic acid, ethane-1,2-dicarboxy-1,2-diphosphonic acid, methanehydroxyphosphonic acid, aminotrimethylenephosphonic acid, and ethylenediaminetetraxymethylenesulfonic acid, or salts thereof. Citric acid is preferred. The content of the sequestering agent is preferably 0.01 to 3.0% based on the total mass of the liquid detergent composition. When the content of the sequestering agent is equal to or greater than the lower limit, the effect of further enhancing detergency is excellent. In addition, the effect of further enhancing the effect of inhibiting color fading is excellent. When the content of the sequestering agent is equal to or less than the upper limit, the effect of further enhancing low-temperature stability is excellent.

[0046] <Water-miscible organic solvent> A water-miscible organic solvent is an organic solvent that dissolves 25 g or more in 1 L of water at 25°C. Examples of water-miscible organic solvents include alcohols such as ethanol, glycerin, 1-propanol, 2-propanol, 1-butanol, and 3-methoxy-3-methyl-1-butanol (Solfit, trade name); glycols such as propylene glycol (PG), butylene glycol, and hexylene glycol; polyglycols such as diethylene glycol, triethylene glycol, tetraethylene glycol, polyethylene glycol having a molecular weight of about 200 to 1000, and dipropylene glycol; and alkyl ethers such as diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, diethylene glycol monobutyl ether (butyl carbitol), and diethylene glycol dimethyl ether. The water-miscible organic solvent may be used alone or in combination of two or more. A combination of two or more is preferred. Using two or more water-miscible organic solvents can further improve the low-temperature stability of the liquid detergent composition. The content of the water-miscible organic solvent is preferably from 1 to 40 mass %, more preferably from 5 to 30 mass %, based on the total mass of the liquid detergent composition.

[0047] <Higher fatty acid or its salt> The higher fatty acid or its salt (soap) contributes to antifoaming properties. The term "antifoaming properties" refers to the ability to suppress foaming when using a liquid detergent composition for laundry, specifically when the liquid detergent composition is diluted with tap water or the like before use. The higher fatty acid is a saturated or unsaturated fatty acid having 8 to 24 carbon atoms, and preferably a saturated or unsaturated fatty acid having 8 to 22 carbon atoms. Examples of higher fatty acids or salts thereof include single fatty acids or salts thereof such as caprylic acid, capric acid, lauric acid, myristic acid, palmitic acid, stearic acid, isostearic acid, hydroxystearic acid, oleic acid, and behenic acid; and mixed fatty acids or salts thereof such as coconut fatty acid and beef tallow fatty acid. As the higher fatty acid, lauric acid, myristic acid, palmitic acid, and coconut fatty acid are preferred, and coconut fatty acid is more preferred. Examples of the form of the salt of the higher fatty acid include alkali metal salts (such as sodium salts, potassium salts, etc.), alkaline earth metal salts (such as magnesium salts, calcium salts, etc.), ammonium salts, alkanolamine salts (such as monoethanolamine salts, diethanolamine salts, etc.). The higher fatty acid or its salt may be used alone or in combination of two or more. The content of the higher fatty acid or its salt is preferably 0.5 to 10% by mass, more preferably 1 to 8% by mass, based on the total mass of the liquid detergent composition.

[0048] <pH adjuster> Examples of the pH adjuster include alkanolamine, sodium hydroxide, potassium hydroxide, hydrochloric acid, sulfuric acid, p-toluenesulfonic acid, etc. It is preferable that the pH adjuster contains alkanolamine. Alkanolamine neutralizes the (A2) component, enhances the transparency of the liquid detergent composition, and contributes to the improvement of low-temperature stability. In addition, due to the chlorine capture effect, it prevents the decolorization of the dye on the object to be washed and further enhances the anti-fading effect. Examples of alkanolamine include monoethanolamine, diethanolamine, triethanolamine, isopropanolamine, 2-amino-2-methyl-1-propanol, etc. Among them, monoethanolamine is preferred. The content of alkanolamine is preferably 0.5 to 4.5% by mass, more preferably 1 to 4% by mass, still more preferably 1 to 3% by mass, based on the total mass of the liquid detergent composition.

[0049] <Component (C)> Component (C) is a compound selected from, for example, alkylene oxide adducts of polyalkyleneimine and alkylene oxide adducts of polyalkyleneamine described in JP-A-2024-80328 and the like. Commercially available products of alkylene oxide adducts of polyalkyleneimine include, for example, the product named "Sokalan HP20" manufactured by BASF. The content of component (C) is preferably 0.1 to 10% by mass, more preferably 1 to 5% by mass, based on the total mass of the liquid detergent composition. When the content of component (C) is equal to or greater than the above-mentioned lower limit, color fading of the washed items can be more effectively suppressed. When the content of component (C) is equal to or less than the above-mentioned upper limit, low-temperature stability can be further improved.

[0050] <Bleach> Examples of bleaching agents include hydrogen peroxide, peroxides that release hydrogen peroxide in water, and chlorine-based compounds such as sodium hypochlorite. Examples of the peroxides include sodium percarbonate, sodium perborate monohydrate, and sodium perborate tetrahydrate. To further enhance the anti-fading effect, the liquid detergent composition preferably contains substantially no bleaching agent, or if it contains bleaching agent, it preferably contains only a small amount. For example, the bleaching agent content is preferably 10% by mass or less, more preferably 5% by mass or less, and even more preferably 3% by mass or less, based on the total mass of the liquid detergent composition. It may even be zero.

[0051] <Physical Properties> The pH of the liquid detergent composition at 25° C. is preferably 5 to 9, more preferably 6 to 8, and even more preferably 6.5 to 7.5. When the pH is equal to or less than the above upper limit, good low-temperature stability is likely to be obtained. In this specification, the pH of the liquid detergent composition is a value measured by adjusting the temperature of the measurement object to 25°C using a pH meter (manufactured by DKK-TOA Corporation, product name "HM-30G").

[0052] The viscosity of the liquid detergent composition is not particularly limited. It is preferable that the liquid detergent composition has fluidity such that when the liquid detergent composition is placed in a container and the container is tilted, the liquid level quickly tilts. For example, the viscosity measured with a Brookfield viscometer is preferably 10 to 1,000 mPa·s, and more preferably 10 to 500 mPa·s.

[0053] ≪Manufacturing method≫ The liquid detergent composition can be produced by a conventional method by mixing components (A) and (B) and, if necessary, other components, and adjusting the pH to a predetermined value using a pH adjuster. When component (B) is in powder form, a preferred method is to first dissolve component (B) in water to prepare an aqueous solution, and then mix the aqueous solution of component (B) with component (A) and other components as necessary. For example, it is preferred to first prepare an aqueous solution with a concentration of 1% by mass for component (B) with an average molecular weight of 10,000 to 2,200,000, and a solution with a concentration of 0.5% by mass for component (B) with an average molecular weight of 2,200,000 to 4,800,000.

[0054] ≪Applications≫ The liquid detergent composition of this embodiment is for use on textile products. In this specification, "textile products" include, for example, clothing, dishcloths, towels, handkerchiefs, sheets, curtains, pillowcases, toilet mats, and the like. The material of the textile product is not particularly limited, and examples thereof include natural fibers, synthetic fibers, semi-synthetic fibers, regenerated fibers, and blends, woven or knitted products of these fibers. Examples of natural fibers include cotton, wool, and linen. Examples of synthetic fibers include polyester, nylon, and acrylic. An example of the semi-synthetic fiber is acetate. Examples of regenerated fibers include rayon, Tencel, and Polynosic.

[0055] <Washing Instructions> The washing method of this embodiment includes a washing step of bringing a washing liquid containing the liquid detergent composition of this embodiment into contact with textile products. The cleaning liquid is preferably a liquid obtained by diluting the liquid detergent composition with water. The amount of the liquid detergent composition used is such that the content of component (B) is 0.03 to 10 ppm relative to the total mass of the cleaning liquid.

[0056] The washing step is a step of bringing a washing liquid into contact with the textile product to wash the textile product. The washing step preferably includes an operation of immersing the textile product in a washing solution (immersion operation). The washing step may include only the immersion operation, or may include a washing operation of applying an external force in addition to the immersion operation. The bath ratio in the immersion operation, expressed as [mass of cleaning solution] / [mass of textile product], is preferably 5 or more, more preferably 10 or more, and even more preferably 20 or more. When the bath ratio is equal to or greater than the above-mentioned lower limit, the contact efficiency between the textile product and the cleaning solution is further increased, thereby improving the cleaning effect. The upper limit of the bath ratio is not particularly limited, but may be, for example, 50. The washing operation may be a stirring operation in which the washing liquid in which the items to be washed are immersed is stirred to apply shear force to the items to be washed, a washing operation by hand washing in a sink, or a washing operation in which the textile products are placed in a bag or the like and rubbed to wash. The stirring operation is carried out, for example, by rotating or turning the washing tub of the washing machine. The rotation speed and rotation time of the washing tub during the stirring operation can be appropriately set depending on the type and amount of textile products.

[0057] In the washing step, the time (contact time) for contacting the washing liquid with the textile product is preferably 3 minutes or more, more preferably 5 minutes or more, and more preferably 10 minutes or more. When the contact time is equal to or greater than the above-mentioned lower limit, the washing effect can be further improved. Although there is no particular upper limit for the contact time, from the viewpoint of washing efficiency, it is preferably 6 hours or less, more preferably 2 hours or less, even more preferably 30 minutes or less, and particularly preferably 15 minutes or less. In this specification, the term "contact time" refers to the time from when the cleaning liquid is brought into contact with the textile product until the cleaning liquid is separated from the textile product.

[0058] The temperature of the washing liquid in the washing step is preferably 10 to 50°C, more preferably 20 to 40°C. When the temperature of the washing liquid in the washing step is equal to or higher than the above lower limit, the washing effect can be further improved. When the temperature of the washing liquid in the washing step is equal to or lower than the above upper limit, deterioration of the textile product can be suppressed.

[0059] The washing method of this embodiment may include a dehydration step, which is a step of removing water adhering to the textile product. Examples of dehydration methods include applying centrifugal force to the textile product that has come into contact with the cleaning liquid, and squeezing the textile product to remove the cleaning liquid.

[0060] The washing method of this embodiment may have a rinsing step after the washing step. Examples of rinsing methods include a method in which water is added to the cleaning liquid in which the textile product is immersed to prepare a rinsing liquid, and the textile product is brought into contact with the rinsing liquid and subjected to mechanical force such as stirring. Examples of rinsing methods include a method in which the cleaning liquid and the textile product are separated, the separated textile product is brought into contact with water, and subjected to mechanical force such as stirring. Examples of methods for separating the cleaning liquid and the textile product include a method in which the textile product is removed from the cleaning liquid. Methods for removing the textile product from the cleaning liquid also include a method in which the cleaning liquid is drained from the washing tub. After separating the cleaning liquid and the textile product, a dehydration step may be performed before contacting the textile product with water.

[0061] It is preferable to carry out a washing step, and further to carry out a rinsing step and a dehydration step as necessary, followed by a drying step. In the drying step, the textile product may be dried by heating, or may be dried naturally without being actively heated. [Example]

[0062] The present invention will be described in more detail below with reference to examples, but the present invention is not limited to the following description. In these examples, "%" representing the unit of content is "% by mass" unless otherwise specified.

[0063] (Raw materials used) Component (A) <Component (A1)> A1-1: AE7, a polyoxyethylene alkyl ether (manufactured by Lion Specialty Chemicals Co., Ltd., trade name "Rheox CL-70") in which 7 moles of ethylene oxide are added to an alcohol having 12 to 14 carbon atoms; (A11) in which R 32is at least one linear alkyl group selected from alkyl groups having 12 carbon atoms and alkyl groups having 14 carbon atoms, and R 33 A compound in which is a hydrogen atom, p1 is 7, q1 is 0, and r1 is 0. A1-2: AE15, a polyoxyethylene alkyl ether obtained by adding 15 moles of ethylene oxide to an alcohol having 12 to 14 carbon atoms; in the formula (A11), R 32 is at least one linear alkyl group selected from alkyl groups having 12 carbon atoms and alkyl groups having 14 carbon atoms, and R 33 A compound in which is a hydrogen atom, p1 is 15, q1 is 0, and r is 0. A1-3: MEE, polyoxyethylene fatty acid methyl ester, R in formula (A12) 34 is an alkyl group having 11 carbon atoms and an alkyl group having 13 carbon atoms, -X 1 - is -COO-, and R 35 is a methyl group, p2=15, q2=0, and r2=0. A1-4: a Guerbet alcohol-type nonionic surfactant (manufactured by BASF, trade name "LutensolXP100") in which 10 moles of ethylene oxide are added to a C10 alcohol obtained by subjecting primary branched AE10 and pentanol to the Guerbet reaction; in the formula (A13), R 36 is an n-pentyl group, R 37 is an n-propyl group, R 38 A compound where O is EO and p3 is 10.

[0064] <(A2) component> A2-1: LAS-H, linear alkylbenzene sulfonic acid having an alkyl group with 10 to 14 carbon atoms (manufactured by Lion Specialty Chemicals Co., Ltd., trade name "Lipon LH-200"). A2-2: AES-1, polyoxyethylene alkyl ether sulfate sodium salt, a mixture of one having a linear alkyl group with 12 carbon atoms (C12) and an average repeat number of oxyethylene groups of 1, and one having a linear alkyl group with 14 carbon atoms (C14) and an average repeat number of oxyethylene groups of 1 (mass ratio of C12:C14 = 75:25).

[0065] ≪(B) Component≫ B-1: Polyethylene oxide (viscosity average molecular weight 150,000-400,000) manufactured by Sumitomo Seika Chemicals Co., Ltd., product name "Polyethylene Oxide", grade: PEO-1. B-2: Polyethylene oxide (viscosity average molecular weight 400,000-600,000) manufactured by Sumitomo Seika Chemicals Co., Ltd., product name "Polyethylene Oxide", grade: PEO-2. B-3: Polyethylene oxide (viscosity average molecular weight 600,000-1,100,000) manufactured by Sumitomo Seika Chemicals Co., Ltd., product name "Polyethylene Oxide", grade: PEO-3. B-4: Polyethylene oxide (viscosity average molecular weight 1.1 million to 1.5 million) manufactured by Sumitomo Seika Chemicals Co., Ltd., product name "Polyethylene Oxide", grade: PEO-4. B-5: Polyethylene oxide (viscosity average molecular weight 1.7-2.2 million) manufactured by Sumitomo Seika Chemicals Co., Ltd., product name "Polyethylene Oxide", grade: PEO-8. B-6: Polyethylene oxide (viscosity average molecular weight 3.3-3.8 million) manufactured by Sumitomo Seika Chemicals Co., Ltd., product name "Polyethylene Oxide", grade: PEO-15. B-7: Polyethylene oxide (viscosity average molecular weight 4.3-4.8 million) manufactured by Sumitomo Seika Chemicals Co., Ltd., product name "Polyethylene Oxide", grade: PEO-18. B-8: Polyethylene glycol (number average molecular weight 11,000) manufactured by Sanyo Chemical Industries, Ltd., product name "PEG10000".

[0066] ≪Optional ingredients≫ PEG1000: Polyethylene glycol, manufactured by Lion Corporation, trade name "PEG#1000-L60", weight average molecular weight 1000). Palm fatty acids: Manufactured by NOF Corporation, product name "Palm Fatty Acids." Ethanol: Manufactured by Japan Alcohol Sales Co., Ltd., product name: "Specific Alcohol 95% Synthetic." · Solfit: 3-Methoxy-3-methylbutanol, manufactured by Kuraray Co., Ltd., trade name "Solfit." Dichrosan: 4,4'-dichloro-2-hydroxydiphenyl ether (manufactured by BASF, trade name "TINOSAN (registered trademark) HP100"). Monoethanolamine: Manufactured by Nippon Shokubai Co., Ltd., product name "Monoethanolamine." Citric acid: Manufactured by Fuso Gakuin Kogyo Co., Ltd., product name "Liquid Citric Acid". Sodium lactate: Manufactured by Musashino Chemical Laboratory Co., Ltd., product name "Sodium lactate." HP20: Ethylene oxide adduct of polyethyleneimine (manufactured by BASF, trade name "Sokalan HP20"). Amylase: Novozymes, brand name "Amplify Prime", liquid enzyme preparation. Protease: Novozymes, trade name "Progress Uno 100L", enzyme liquid preparation. Fragrance: Takasago International Corporation, product name "Fresh Inclusive". Pigment: Milliken Japan LLC, product name "Brillant Orange". Water: Ion-exchanged water.

[0067] Evaluation Method <Fade prevention effect> The evaluation cloth was washed under the following test conditions using an agitation washing tester (Tergoto-Meter, manufactured by Ueshima Seisakusho). The whiteness (Z value) of the evaluation cloth before and after washing was measured using a color difference meter (manufactured by Nippon Denshoku Industries Co., Ltd., product name "SE7700 type"), and ΔZ was calculated using the following formula. The larger ΔZ indicates the more advanced the fading. The fading inhibition effect was evaluated based on ΔZ using the following evaluation criteria. ΔZ = Z value (after processing) - Z value (before processing) [Test conditions] Washing conditions: 100 minutes of washing, 1 rinse, 1 minute of spin-drying. Drying conditions: natural drying. Fabric evaluated: GU soft cotton crew neck T-shirt (black, long sleeves). [Evaluation criteria] ◎: ΔZ is 0 or more and less than 0.05. Good: ΔZ is 0.05 or more and less than 0.08. △: ΔZ is 0.08 or more and less than 0.1. ×: ΔZ is 0.1 or more.

[0068] <Low temperature stability> The liquid detergent composition of each example was placed in a glass bottle (PS11 bottle), stored at -20°C for 24 hours, and then stored at 0°C for 24 hours. This process was repeated three times, and then the presence or absence of floating matter or precipitate was visually observed at 0°C. Furthermore, if the liquid gels during low-temperature storage, its fluidity will be impaired. After repeating the above procedure three times, the glass bottle was tilted at 0°C, and the liquid level was visually observed to confirm whether it had fluidity. If the liquid level quickly tilted when the glass bottle was tilted, it was judged to have "fluidity." Low-temperature stability was evaluated according to the following evaluation criteria. [Evaluation criteria] ◎: The liquid is uniform, free of suspended matter or sediment, and fluid. Good: No floating matter or sediment, but the liquid is slightly cloudy overall. △: There is floating matter or sediment. It is fluid. ×: Floating matter or sediment is found. No fluidity.

[0069] (Examples 1 to 16, Comparative Examples 1 to 4) Each liquid detergent composition was prepared by adding and mixing component (A), component (B), and optional components to water according to the formulations shown in Tables 1 to 4. Since the high-molecular-weight component (B) is a powder, it was dissolved in water before use. The blend amounts in the table are pure content values. The "balance" water content refers to the remainder added so that the total blend amount (mass %) of all blended components contained in the liquid composition becomes 100 mass %. The liquid detergents of each example were evaluated for their color fading suppression effect and low temperature stability, and the results are shown in the table.

[0070] [Table 1]

[0071] [Table 2]

[0072] [Table 3]

[0073] [Table 4]

[0074] As shown in Tables 1 to 4, the liquid detergent compositions of Examples 1 to 16 have good low-temperature stability and excellent anti-fading effects. In particular, Examples 8 and 9 exhibited excellent anti-fading effects even with a small content of component (B). Comparative Example 1, which did not contain component (B), exhibited poor anti-fading effect. Comparative Example 2, in which the content of component (B) exceeded 10% by mass, exhibited poor low-temperature stability. Comparative Example 3, in which the content of component (B) was less than 0.01% by mass, exhibited poor anti-fading effect. Comparative Example 4, in which the content of component (A) was 50% by mass or more, was inferior in both the effect of inhibiting color fading and the low-temperature stability.

Claims

1. A liquid detergent composition for fabric products, comprising: component (A), which is a surfactant (excluding soap) containing the following component (A1) and the following component (A2); and component (B), The content of the component (A) is less than 50% by mass based on the total mass of the liquid detergent composition for fabric products, The content of the component (A2) is 5% by mass or more based on the total mass of the liquid detergent composition for fabric products, A liquid detergent composition for textile products, wherein the content of the component (B) is 0.01 to 10 mass % relative to the total mass of the liquid detergent composition for textile products. Component (A1): a nonionic surfactant. Component (A2): a non-soap anionic surfactant. (B) Component: Polyethylene glycol with an average molecular weight of 10,000 or more.

2. 2. The liquid detergent composition for textile products according to claim 1, wherein (A1) / (B), which represents the mass ratio of the content of the component (A1) to the content of the component (B), is 1 to 4,500.

3. A cleaning process comprising contacting textile products with a cleaning liquid containing the liquid detergent composition for textile products according to claim 1 or 2, The washing method, wherein the content of the component (B) relative to the total mass of the washing liquid is 0.03 to 10 ppm.

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