Liquid detergent composition for textile products

Abstract

To provide a liquid detergent composition for textile products that can give textile products flexibility and other effects such as improved texture even when used in e.g. a washing step for cleaning and rinsing and has excellent low-temperature stability.SOLUTION: The present invention is a liquid detergent composition for textile products, which contains component (a) and component (b). Component (a): one or more types of surfactant selected from between component (a1) and component (a2). Component (a1): one or more types of anionic surfactant selected from among an internal olefin sulfonate salt having 10-18 carbon atoms, a sulfate ester salt having an alkyl group or alkenyl group with 10-24 carbon atoms, a polyoxyalkylene alkyl or alkenyl ether sulfuric ester salt having an alkyl group or alkenyl group with 10-24 carbon atoms, and a sulfonate salt having an alkyl group or alkenyl group with 10-24 carbon atoms (excluding an internal olefin sulfonate salt having 10-18 carbon atoms). Component (a2): a non-ionic surfactant having a Davies HLB value of 6.7 or more. Component (b): an alcohol having 8-18 carbon atoms.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.

Background Art

[0002] In powder detergent compositions for textile products such as clothing, anionic surfactants and nonionic surfactants are used as cleaning components. As anionic surfactants, anionic surfactants having a sulfonic acid group or its salt, represented by alkylbenzene sulfonates, and anionic surfactants having a sulfate ester salt, represented by alkyl sulfate esters and polyoxyalkylene alkyl sulfate esters, are known. For example, providers of laundry detergents use a plurality of anionic surfactants in combination from the viewpoint of detergency against various stains adhering to clothing. On the other hand, with the increasing awareness of hygiene among consumers, there is also a growing interest in the odor and bacteria of clothing. It is known that various bacteria existing in the skin commensal bacteria and the environment adhere to and multiply on clothing. As a means of suppressing the growth of bacteria adhering to clothing, it is known to use quaternary ammonium surfactants. Also, aromatic chlorine-based compounds such as dichlorosan are known as compounds having antibacterial and bactericidal properties.

[0003] Patent Document 1 discloses a liquid laundry detergent containing at least one (A) selected from the group consisting of a specific polyoxyethylene alkyl ether sulfate and a specific alkylbenzene sulfonate, at least one (B) selected from the group consisting of a specific polyoxyethylene alkyl ether, a specific higher alcohol, and a specific alpha-sulfo fatty acid alkyl ester salt, and a specific water-soluble inorganic salt or an organic acid salt having 1 to 6 carbon atoms (C) under predetermined conditions.

[0004] Patent Document 2 discloses an anionic surfactant composition containing (a) 55 to 70% by mass of a sulfate ester salt of a higher alcohol, (b) 0.10 to 4.0% by mass of a higher alcohol having 10 to 22 carbon atoms, (c) 0.10 to 3.9% by mass of an alkali metal carbonate, (d) 0.10 to 1.9% by mass of an alkali metal hydroxide, and water.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0006] In addition to cleaning dirt, it is desired that a detergent for textile products can also exhibit other effects such as improving the texture of the fiber. However, when used in a washing process where the detergent is washed and rinsed, the active ingredients do not sufficiently remain on the fiber, making it difficult to exhibit the intended effects. Also, for a liquid composition, it is desired to have excellent stability at low temperatures. The present invention provides a liquid detergent composition for textile products that can impart effects such as imparting softness and improving texture even when used in a washing process such as washing and rinsing, and has excellent low-temperature stability.

Means for Solving the Problems

[0007] The present invention relates to a liquid detergent composition for textile products containing the following component (a) and component (b). Component (a): One or more surfactants selected from the following component (a1) and component (a2) (a1) Component: One or more anionic surfactants selected from internal olefin sulfonates having 10 to 18 carbon atoms, sulfate esters having an alkyl or alkenyl group with 10 to 24 carbon atoms, polyoxyalkylene alkyl or alkenyl ether sulfates having an alkyl or alkenyl group with 10 to 24 carbon atoms, and sulfonates having an aliphatic alkyl or alkenyl group with 10 to 24 carbon atoms (excluding internal olefin sulfonates having 10 to 18 carbon atoms). (a2) Component: Nonionic surfactants with a Davies HLB value of 6.7 or higher. (b) Component: Alcohols having 8 to 18 carbon atoms.

[0008] The present invention also relates to a method for washing textile products, which comprises washing the textile products with a washing liquid obtained by mixing the liquid detergent composition for textile products of the present invention and water, and then rinsing the textile products with water.

Advantages of the Invention

[0009] According to the present invention, even when used in a washing process such as a washing step for washing and rinsing, effects such as imparting softness and improving the texture can be imparted to textile products, and a liquid detergent composition for textile products with excellent low-temperature stability is provided.

Embodiments for Carrying Out the Invention

[0010] [Liquid Detergent Composition for Textile Products] The liquid detergent composition for textile products of the present invention contains, as component (a), one or more surfactants selected from the following (a1) component and (a2) component. (a1) Component: One or more anionic surfactants selected from internal olefin sulfonates having 10 to 18 carbon atoms, sulfate esters having an alkyl or alkenyl group with 10 to 24 carbon atoms, polyoxyalkylene alkyl or alkenyl ether sulfates having an alkyl or alkenyl group with 10 to 24 carbon atoms, and sulfonates having an aliphatic alkyl or alkenyl group with 10 to 24 carbon atoms (excluding internal olefin sulfonates having 10 to 18 carbon atoms). (a2) Component: A nonionic surfactant with a Davies HLB value of 6.7 or more

[0011] Internal olefin sulfonates having 10 to 18 carbon atoms can be obtained by sulfonating internal olefins having 10 to 18 carbon atoms. The internal olefin refers to an olefin in which the double bond is present inside the 2-position. The internal olefin can be obtained, for example, by isomerizing a 1-olefin obtained by dehydrating a 1-alcohol. When the internal olefin is sulfonated, β-sultone is quantitatively produced, and a part of the β-sultone is changed to γ-sultone and olefin sulfonic acid, and further these are converted to hydroxyalkane sulfonate and olefin sulfonate in the neutralization / hydrolysis step (for example, J. Am. Oil Chem. Soc. 69, 39 (1992)). Here, the hydroxy group of the obtained hydroxyalkane sulfonate is inside the alkane chain, and the double bond of the olefin sulfonate is inside the olefin chain. Further, the obtained product is mainly a mixture of these, and a small amount of hydroxyalkane sulfonate having a hydroxy group at the end of the carbon chain or α-olefin sulfonate having a double bond at the end of the carbon chain may be contained in a part thereof. In this specification, these respective products and their mixtures are collectively referred to as internal olefin sulfonates. Further, the hydroxyalkane sulfonate is referred to as the hydroxy form of the internal olefin sulfonate (hereinafter, also referred to as HAS), and the olefin sulfonate is referred to as the olefin form of the internal olefin sulfonate (hereinafter, also referred to as IOS).

[0012] The number of carbon atoms of the internal olefin sulfonate is 10 or more, preferably 14 or more, and 18 or less. From the viewpoints of flexibility and low-temperature stability, an internal olefin sulfonate having 16 carbon atoms is preferred. The liquid detergent composition for fiber products of the present invention can contain an internal olefin sulfonate having 16 carbon atoms as the component (a1). In addition, the number of carbon atoms of the internal olefin sulfonate does not include the number of carbon atoms in the salt part. That is, the number of carbon atoms in the olefin part is the number of carbon atoms of the internal olefin sulfonate. That is, the number of carbon atoms of the internal olefin sulfonate represents the number of carbon atoms of the internal olefin to which the sulfonate is covalently bonded.

[0013] Examples of the salt of the internal olefin sulfonate include an alkali metal salt, an alkaline earth metal (1 / 2 atom) salt, an ammonium salt, or an organic ammonium salt. Examples of the alkali metal salt include a sodium salt and a potassium salt. Examples of the organic ammonium salt include an alkanolammonium salt having 1 to 6 carbon atoms.

[0014] The internal olefin sulfonate also includes those containing a trace amount of so-called alpha olefin sulfonate (hereinafter also referred to as α-olefin sulfonate) in which the position of the sulfonate is present at the 1-position of the carbon chain. From the viewpoints of flexibility and low-temperature stability, the content of the α-olefin sulfonate in the internal olefin sulfonate is preferably 10% by mass or less, more preferably 7% by mass or less, still more preferably 5% by mass or less, even more preferably 3% by mass or less, and preferably 0.01% by mass or more as the upper limit of the content.

[0015] Internal olefin sulfonates can be obtained by sulfonating olefins having 10 to 18 carbon atoms with double bonds at the 2-position or higher as the main component. When the internal olefins are sulfonated, β-sultones are quantitatively produced, and a part of the β-sultones is converted into γ-sultones and olefin sulfonic acids, and these are further converted into hydroxyalkane sulfonates and olefin sulfonates in the neutralization and hydrolysis steps (for example, J. Am. Oil Chem. Soc. 69, 39 (1992)). Here, the hydroxy group of the obtained hydroxyalkane sulfonate is inside the alkane chain, and the double bond of the olefin sulfonate is inside the olefin chain. Further, the obtained product is mainly a mixture of these, and a small amount of hydroxyalkane sulfonate having a hydroxy group at the end of the carbon chain or olefin sulfonate having a double bond at the end of the carbon chain may be contained in a part thereof.

[0016] In this specification, these respective products and their mixtures are collectively referred to as internal olefin sulfonates. Further, hydroxyalkane sulfonates are referred to as hydroxy forms (HAS) of internal olefin sulfonates, and olefin sulfonates are referred to as olefin forms (IOS) of internal olefin sulfonates. Note that the mass ratio of the compounds in the internal olefin sulfonate can be measured by HPLC-MS. Specifically, for example, the mass ratio can be determined from the HPLC-MS peak area of the internal olefin sulfonate by the method of the examples described later.

[0017] The above-mentioned internal olefin sulfonates may contain a hydroxy form and an olefin form. The mass ratio (olefin form / hydroxy form) of the content of the olefin form of the internal olefin sulfonate to the content of the hydroxy form of the internal olefin sulfonate in the internal olefin sulfonate can be 0 / 100 or more, further 5 / 95 or more, and 50 / 50 or less, further 40 / 60 or less, further 30 / 70 or less, further 25 / 75 or less.

[0018] For the sulfate salt having an alkyl group or alkenyl group with 10 to 24 carbon atoms, the carbon number of the alkyl group or alkenyl group is preferably 12 or more and preferably 20 or less, more preferably 18 or less, from the viewpoints of flexibility and low-temperature stability. The sulfate salt preferably has an alkyl group.

[0019] For the polyoxyalkylene alkyl or alkenyl ether sulfate salt having an alkyl group or alkenyl group with 10 to 24 carbon atoms, the carbon number of the alkyl group or alkenyl group is preferably 12 or more and preferably 18 or less, more preferably 16 or less, from the viewpoints of flexibility and low-temperature stability. The ether sulfate salt preferably has an alkyl group. Examples of the oxyalkylene group of the ether sulfate salt include one or more groups selected from an oxyethylene group and an oxypropylene group. The oxyalkylene group is preferably an oxyalkylene group containing an oxypropylene group. More preferably, it is an oxypropylene group. The average addition mole number of the oxyalkylene group of the ether sulfate salt is preferably 1 or more and 5 or less.

[0020] The sulfonate having an aliphatic alkyl group or alkenyl group with 10 to 24 carbon atoms (excluding internal olefin sulfonates with 10 to 18 carbon atoms) is a compound having no aromatic ring. Examples of the sulfonate having an aliphatic alkyl group or alkenyl group with 10 to 24 carbon atoms (excluding internal olefin sulfonates with 10 to 18 carbon atoms) include alkanesulfonates having an alkyl group with 10 to 24 carbon atoms, α-olefin sulfonates having an α-olefin moiety with 10 to 24 carbon atoms, α-sulfofatty acid salts having a fatty acid moiety with 10 to 24 carbon atoms, and one or more anionic surfactants selected from α-sulfofatty acid lower alkyl ester salts having a fatty acid moiety with 10 to 24 carbon atoms and an ester moiety with 1 to 5 carbon atoms.

[0021] Examples of the salt of component (a1) include alkali metal salts, alkaline earth metal (1 / 2 atom) salts, ammonium salts, or 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 1 to 6 carbon atoms. From the viewpoints of flexibility and low-temperature stability, the salt of component (a1) is preferably an alkali metal salt or an alkanolammonium salt having 1 to 6 carbon atoms, and from the viewpoint of low-temperature stability, an alkanolammonium salt having 1 to 6 carbon atoms is more preferable.

[0022] Examples of the nonionic surfactant having a Davies' HLB value of 6.7 or more include alcohol alkoxylates, ester alkoxylates, polyhydric alcohol fatty acid esters which may contain an alkyleneoxy group, alkyl glycosides, polyoxyethylene glycol, polyoxyethylene oxypropylene glycol, polyoxypropylene oxyethylene oxypropylene glycol, and the like, and nonionic surfactants having a Davies' HLB value of 6.7 or more selected therefrom. Examples of the alcohol alkoxylates include polyoxyalkylene alkyl ethers and polyoxyalkylene alkenyl ethers. Examples of the polyhydric alcohol fatty acid esters which may contain an alkyleneoxy group include glycerin fatty acid esters, polyglycerin fatty acid esters, propylene glycol fatty acid esters, polyethylene glycol fatty acid esters, sorbitan fatty acid esters, sucrose fatty acid esters, polyoxyethylene sorbitan fatty acid esters, and the like.

[0023] Component (a2) has a Davies' HLB value of 6.7 or more, and is preferably 7.0 or more, more preferably 7.5 or more, still more preferably 8.0 or more, and even more preferably 8.5 or more from the viewpoints of flexibility and low-temperature stability, and is preferably 12.0 or less, more preferably 11.0 or less, still more preferably 10.5 or less, and even more preferably 10.0 or less.

[0024] The HLB value of Davies can be calculated by the following formula (page 196 of "Interfaces and Surfactants", published by The Japan Oil Chemists' Society, Incorporated Administrative Agency). HLB = 7 + Σ(basic value of hydrophilic group) + Σ(basic value of lipophilic group) As examples of the basic values, methyl group (-0.475), methylene group (-0.475), methine group (-0.475), ester group (2.4), carboxyl group (2.1), hydroxy group (1.9), ether bond (1.3), oxyethylene group (0.33), and oxypropylene group (-0.15) are used.

[0025] Among these, from the viewpoints of flexibility and low-temperature stability, alcohol alkoxylates and ester alkoxylates with a Davies HLB value of 6.7 or more are preferable. Examples of alcohol alkoxylates and ester alkoxylates with a Davies HLB value of 6.7 or more include nonionic surfactants represented by the following general formula (1) and having a Davies HLB value of 6.7 or more. R 1 (CO) m O-(AO) n -R 2 (1) [In the formula, R 1 is an aliphatic hydrocarbon group having 9 to 18 carbon atoms, R 2 is a hydrogen atom or a methyl group, CO is a carbonyl group, m is a number of 0 or 1, AO is one or more alkyleneoxy groups selected from an alkyleneoxy group having 2 carbon atoms and an alkyleneoxy group having 3 carbon atoms, and AO contains at least an alkyleneoxy group having 2 carbon atoms. When AO contains an alkyleneoxy group having 2 carbon atoms and an alkyleneoxy group having 3 carbon atoms, the alkyleneoxy group having 2 carbon atoms and the alkyleneoxy group having 3 carbon atoms may be in a block type bond or a random type bond. n is the average addition mole number and is a number of 1 or more and 50 or less.]

[0026] In formula (1), the number of carbon atoms of R 1 is preferably 9 or more, and preferably 16 or less. In formula (1), R 1The aliphatic hydrocarbon group includes an alkyl group and an alkenyl group. In formula (1), m is preferably 0. In formula (1), AO is at least one alkyleneoxy group selected from an alkyleneoxy group having 2 carbon atoms and an alkyleneoxy group having 3 carbon atoms, and AO contains at least an alkyleneoxy group having 2 carbon atoms. In AO, the proportion of the alkyleneoxy group having 2 carbon atoms, that is, the ethyleneoxy group, is preferably 60 mol% or more, more preferably 70 mol% or more, still more preferably 80 mol% or more, and 100 mol% or less, and may be 100 mol%. When AO contains an ethyleneoxy group which is an alkyleneoxy group having 2 carbon atoms and a propyleneoxy group which is an alkyleneoxy group having 3 carbon atoms, the ethyleneoxy group and the propyleneoxy group may be in a block type bond or a random type bond. The AO group is a group containing an ethyleneoxy group from the viewpoint of not inhibiting the softening effect of the fiber. In formula (1), n is preferably 6 or more, more preferably 12 or more, from the viewpoint of flexibility, and preferably 50 or less, more preferably 45 or less, from the viewpoint of low-temperature stability. R in formula (1) 1 、R 2 、m, AO, and n are selected so that the Davies HLB value of the nonionic surfactant represented by general formula (1) is 6.7 or more.

[0027] As the alcohol alkoxylate in which the Davies HLB value of the component (a2) is 6.7 or more, from the viewpoints of flexibility and low-temperature stability, there is mentioned an alcohol alkoxylate represented by the following general formula (2) and having a Davies HLB value of 6.7 or more. R 11 -O-(EO) n1 -(AO) n2 -(EO) n3 -H (2) 〔In the formula, R 11is an alkyl group or alkenyl group having 10 to 18 carbon atoms, EO is an ethyleneoxy group, AO is an alkyleneoxy group having 3 or 4 carbon atoms, n1, n2, and n3 are the average number of moles of addition of EO and AO, n1 is 0 or more and 20 or less, n2 is 1 or more and 10 or less, and n3 is 1 or more and 20 or less.

[0028] In formula (2), R 11 has a carbon number of preferably 10 or more and preferably 15 or less from the viewpoints of flexibility and low-temperature stability. n1, n2, and n3 are the average number of moles of addition of EO and AO. From the viewpoints of flexibility and low-temperature stability, n1 is preferably 1 or more, more preferably 2 or more, still more preferably 3 or more, and preferably 15 or less, more preferably 12 or less, still more preferably 10 or less. n2 is preferably 1.5 or more, more preferably 2 or more, and preferably 10 or less, more preferably 8 or less. n3 is preferably 2 or more, more preferably 3 or more, and preferably 17 or less, more preferably 15 or less, still more preferably 12 or less, and even more preferably 10 or less.

[0029] R in formula (2) 11 , AO, n1, n2, and n3 are selected so that the Davies' HLB value of the alcohol alkoxylate is 6.7 or more.

[0030] From the viewpoints of flexibility and low-temperature stability, the liquid detergent composition for textile products of the present invention preferably contains the (a1) component as the (a) component. The liquid detergent composition for textile products of the present invention may contain only the (a1) component as the (a) component, for example, from the same viewpoints. Further, from the same viewpoints, the liquid detergent composition for textile products of the present invention preferably contains the anionic surfactant of the (a1) component and the nonionic surfactant of the (a2) component as the (a) component.

[0031] As described above, from the viewpoints of softness and low-temperature stability, the liquid detergent composition for textile products of the present invention preferably contains the component (a1) as the component (a). Therefore, (a1) / [(a1) + (a2)], which is the mass ratio of the content of the component (a1) to the total of the content of the component (a1) and the content of the component (a2), is preferably 1 or less. (a1) / [(a1) + (a2)] is preferably 0.1 or more and 1 or less. (a1) / [(a1) + (a2)] may be 1. In this case, it means that only the component (a1) is contained as the component (a). Further, when the liquid detergent composition for textile products of the present invention contains the component (a1) and the component (a2) as the component (a), from the viewpoints of softness and low-temperature stability, (a1) / [(a1) + (a2)] is preferably 0.1 or more, more preferably 0.15 or more, still more preferably 0.25 or more, and preferably less than 1, more preferably 0.85 or less, still more preferably 0.80 or less, and even more preferably 0.75 or less.

[0032] From the viewpoints of softness and low-temperature stability, the liquid detergent composition for textile products of the present invention preferably contains the component (a) in an amount of preferably 4% by mass or more, more preferably 20% by mass or more, and preferably 80% by mass or less, more preferably 70% by mass or less, still more preferably 60% by mass or less.

[0033] The liquid detergent composition for textile products of the present invention may contain a surfactant other than the component (a) as long as the effects of the present invention are not affected. The total amount of the surfactant in the liquid detergent composition for textile products of the present invention is preferably 4% by mass or more, more preferably 20% by mass or more, and preferably 80% by mass or less, more preferably 70% by mass or less, still more preferably 60% by mass or less.

[0034] From the viewpoints of softness and low-temperature stability, in all the surfactants, the proportion of the component (a) in the liquid detergent composition for textile products of the present invention is preferably 40% by mass or more, more preferably 60% by mass or more, still more preferably 80% by mass or more, even more preferably 90% by mass or more, even more preferably 95% by mass or more, and 100% by mass or less, and may be 100% by mass.

[0035] The liquid detergent composition for textile products of the present invention contains an alcohol having 8 to 18 carbon atoms as component (b). From the viewpoints of flexibility and low-temperature stability, the primary alcohol is preferable as component (b). From the viewpoints of flexibility and low-temperature stability, the aliphatic alcohol is preferable as component (b). From the viewpoints of flexibility and low-temperature stability, the linear alcohol is preferable as component (b). From the viewpoints of flexibility and low-temperature stability, the monohydric alcohol is preferable as component (b). From the viewpoints of flexibility and low-temperature stability, the saturated alcohol is preferable as component (b). From the viewpoints of flexibility and low-temperature stability, the carbon number of component (b) is preferably 10 or more and 14 or less.

[0036] Examples of component (b) include decanol, dodecanol, tetradecanol, hexadecanol, etc. From the viewpoints of flexibility and low-temperature stability, 1-decanol, 1-dodecanol, 1-tetradecanol, 1-hexadecanol are preferable as component (b), 1-dodecanol and 1-tetradecanol are more preferable, and 1-dodecanol is still more preferable.

[0037] From the viewpoints of flexibility and low-temperature stability, the liquid detergent composition for textile products of the present invention contains component (b) preferably in an amount of 0.1% by mass or more, more preferably 0.4% by mass or more, still more preferably 0.5% by mass or more, and preferably 5% by mass or less, more preferably 4.5% by mass or less.

[0038] From the viewpoints of softness and low-temperature stability, the mass ratio of the content of component (b) to the content of component (a), (b) / (a), is preferably 0.002 or more, more preferably 0.004 or more, still more preferably 0.01 or more, even more preferably 0.02 or more, even more preferably 0.035 or more, even more preferably 0.040 or more, even more preferably 0.050 or more, and preferably 0.5 or less, more preferably 0.4 or less, still more preferably 0.2 or less, even more preferably 0.1 or less in the liquid detergent composition for textile products of the present invention.

[0039] The liquid detergent composition for textile products of the present invention preferably further contains the following component (c). Component (c): A polymer having a water hydration amount of 6 g or more per 1 g of the polymer

[0040] Component (c) of the present invention is a polymer having a water hydration amount of 6 g or more per 1 g of the polymer. Component (c) is a polymer having a water hydration amount of 6.0 g or more per 1 g of the polymer among the following polymers.

[0041] From the viewpoints of softness and low-temperature stability, the water hydration amount per 1 g of the polymer is 6 g or more, preferably 6.5 g or more, more preferably 7.0 g or more, still more preferably 8.0 g or more, and preferably 50 g or less, preferably 40 g or less, more preferably 30 g or less, still more preferably 20 g or less. The water hydration amount of the polymer of component (c) can be measured by the method described below.

[0042] 〔Calculation method for water hydration amount of component (c)〕 (c) component's water hydration amount is calculated by preparing a 1.0 mass% aqueous solution of the (c) component with ion-exchanged water and measuring the heat of fusion ΔH [J / g] of water (in the region from -5°C to 5°C) using a differential scanning calorimeter (DSC, Q2000, manufactured by TA instruments). The measurement conditions are as follows: cool down from 40°C to -20°C at a rate of 2°C / min, let it stand at -20°C for 10 minutes, and then heat up to 25°C at a rate of 2°C / min. Using the heat of fusion ΔHw of pure water measured under the same conditions, the water hydration amount (g per 1 g of polymer) is calculated from the formula (100 - 1)×(ΔHw - ΔH) / ΔHw.

[0043] As the (c) component of the present invention, there are one or more (hereinafter referred to as (c1) component) of polysaccharide polymers having a water hydration amount of 6 g or more per 1 g of polymer and having one or more groups selected from hydrocarbon groups having 1 to 18 carbon atoms and cationic groups.

[0044] 〔(c1) component: one or more of polysaccharide polymers having a water hydration amount of 6 g or more per 1 g of polymer and having one or more groups selected from hydrocarbon groups having 1 to 18 carbon atoms and cationic groups〕 (c1) component is one or more of polysaccharide polymers having a water hydration amount of 6 g or more per 1 g of polymer and having one or more groups selected from hydrocarbon groups having 1 to 18 carbon atoms and cationic groups.

[0045] The (c1) component of the present invention is a polysaccharide polymer in which one or more groups selected from cationic groups and hydrocarbon groups having 1 to 18 carbon atoms are bonded directly or via a linking group to a group obtained by removing a hydrogen atom from a hydroxyl group of a polysaccharide or its derivative, which is a precursor compound of the (c) component. It should be noted that the above-mentioned "one or more groups selected from cationic groups and hydrocarbon groups having 1 to 18 carbon atoms are bonded directly or via a linking group to a group obtained by removing a hydrogen atom from a hydroxyl group of a polysaccharide or its derivative" does not include a bonding mode in which a cationic atom of a cationic group, such as a nitrogen cation, directly forms a covalent bond with an oxygen atom, which is a group obtained by removing a hydrogen atom from a hydroxyl group of a polysaccharide or its derivative.

[0046] Examples of the polysaccharide include one or more polysaccharides selected from cellulose, guar gum, or starch. The component (c1) is a polysaccharide polymer, and a polysaccharide polymer can be used as a precursor compound for obtaining the same. That is, the component (c1) may be a derivative of a polysaccharide polymer. Examples of the polysaccharide polymer that is a precursor compound of the component (c1) include a polysaccharide polymer in which some or all of the hydrogen atoms of the hydroxyl groups of the polysaccharide are substituted with a hydroxyalkyl group having 1 to 4 carbon atoms (hereinafter also referred to as a hydroxyalkyl-substituted product). From the viewpoints of flexibility and low-temperature stability, the hydroxyalkyl group having 1 to 4 carbon atoms is preferably a hydroxyalkyl group having 2 to 4 carbon atoms. Examples of the hydroxyalkyl group having 2 to 4 carbon atoms include one or more groups selected from a hydroxyethyl group, a hydroxypropyl group, and a hydroxybutyl group, and from the viewpoints of flexibility and low-temperature stability, one or more groups selected from a hydroxyethyl group and a hydroxypropyl group are preferable. The component (c1) may be a compound in which one or more groups selected from a hydrocarbon group having 1 to 18 carbon atoms and a cationic group are introduced into a polysaccharide or a polysaccharide polymer selected from one or more polysaccharides selected from cellulose, guar gum, or starch or a hydroxyalkyl-substituted product thereof.

[0047] Among the component (c1), the polysaccharide polymer having a hydrocarbon group having 1 to 18 carbon atoms includes a polysaccharide polymer in which a hydrocarbon group having 1 to 18 carbon atoms is bonded to a polysaccharide or a derivative thereof that is a precursor compound of the component (c1) directly or via a linking group [hereinafter referred to as the linking group (1) component].

[0048] The linking group (1) includes one or more groups selected from an alkyleneoxy group having 1 to 3 carbon atoms that may have a hydroxy group, a polyoxyalkylene group in which the alkylene group is an alkylene group having 1 to 3 carbon atoms, a carbonyl group, a carbonyloxy group, and an oxycarbonyl group. One linking group (1) may be one type of the above linking groups or a combination of a plurality of types. Also, the linking group contained in the polysaccharide polymer may be one type or a plurality of types.

[0049] Among the components (c1), the polysaccharide polymer having a hydrocarbon group with 1 to 18 carbon atoms further has a hydrocarbon group with 1 to 18 carbon atoms directly or via a linking group (1), preferably via the linking group (1), attached to the oxygen atom obtained by removing a hydrogen atom from some or all of the hydroxyl groups of the hydroxyalkyl substituent. Examples thereof include polysaccharide polymers.

[0050] From the viewpoints of flexibility and low-temperature stability, the number of carbon atoms of the hydrocarbon group with 1 to 18 carbon atoms is preferably 2 or more, more preferably 8 or more, still more preferably 10 or more, even more preferably 12 or more, and preferably 16 or less, more preferably 14 or less. From the viewpoints of flexibility and low-temperature stability, the hydrocarbon group is preferably an aliphatic hydrocarbon group.

[0051] Regarding the polysaccharide polymer having a hydrocarbon group with 1 to 18 carbon atoms, which is the component (c1), the substitution degree of the hydrocarbon group with 1 to 18 carbon atoms is preferably 0.0001 or more, more preferably 0.001 or more, still more preferably 0.005 or more, from the viewpoints of flexibility and low-temperature stability, and preferably 0.4 or less, more preferably 0.2 or less, still more preferably 0.1 or less, even more preferably 0.08 or less, even more preferably 0.06 or less, from the same viewpoints.

[0052] Among the components (c1), the polysaccharide polymer having one or more groups selected from cationic groups is a polysaccharide or its derivative, which is a precursor compound of the component (c1). From the viewpoints of flexibility and low-temperature stability, preferably, a cationic group is bonded via an alkylene group having 1 to 4 carbon atoms which may contain a hydroxyl group (hereinafter referred to as a linking group (2)), which is a linking group, to the group obtained by removing a hydrogen atom from the hydroxyl group of the hydroxyalkyl substituent. Examples thereof include polysaccharide polymers. The cationic group preferably contains a nitrogen cation, and from the viewpoints of flexibility and low-temperature stability, it is more preferably a quaternary ammonium group by controlling the water content per gram of the polymer to be in the range of 6 g or more.

[0053] The linking group (2) is an alkylene group having 1 to 4 carbon atoms which may contain a hydroxyl group. Examples of the alkylene group having 1 to 4 carbon atoms include one or more alkylene groups selected from a linear alkylene group having 1 to 4 carbon atoms which may contain a hydroxyl group and a branched alkylene group having 1 to 4 carbon atoms which may contain a hydroxyl group.

[0054] (c1) When the degree of substitution of the cationic group of the polysaccharide polymer having a cationic group is high, the amount of water hydrated per 1 g of the polymer can be increased. From the viewpoints of flexibility and low-temperature stability, it is preferable that the value of the degree of substitution of the cationic group of the (c1) component containing a cationic group is high. By controlling the amount of water hydrated per 1 g of the polymer, in consideration of the viewpoints of flexibility and low-temperature stability, in the present invention, it is preferable to select the value of the degree of substitution of the cationic group. The degree of substitution of the cationic group of the polysaccharide polymer which is the (c1) component is preferably 0.001 or more, more preferably 0.005 or more, still more preferably 0.01 or more, and preferably 1 or less, more preferably 0.7 or less, still more preferably 0.4 or less, even more preferably 0.35 or less, even more preferably 0.3 or less, even more preferably 0.25 or less, even more preferably 0.2 or less from the above viewpoints.

[0055] In the present invention, the degree of substitution of one or more groups selected from hydrocarbon groups having 1 to 18 carbon atoms and cationic groups of the (c1) component means the number of substitutions of the group per constituent monosaccharide unit, that is, the molar average degree of substitution (MS). For example, when the polysaccharide is cellulose, the "degree of substitution of the group" means the average number of moles of the group introduced per 1 mole of anhydroglucose unit. The degree of substitution of the cationic group of the polysaccharide polymer and the degree of substitution of the hydrocarbon group having 1 to 18 carbon atoms are determined by the methods described below, respectively.

[0056] [Measurement of the degree of substitution of the cationic group of the (c) component (Kjeldahl method)] After dissolving 1 g of the polymer, which is the (c) component, in 100 g of water, the aqueous solution is placed in a dialysis membrane (Spectra / Por, molecular weight cut-off 1000) and dialyzed for 2 days. The obtained aqueous solution is freeze-dried using a freeze dryer (Eyela, FDU1100) to obtain a pretreated polysaccharide polymer. 200 mg of the polysaccharide polymer pretreated by the above method is accurately weighed, 10 mL of concentrated sulfuric acid and 1 tablet of Kjeldahl tablets (Merck) are added, and heat decomposition is carried out using a Kjeldahl decomposition apparatus (manufactured by BUCHI, K-432). After the decomposition is completed, 30 mL of ion-exchanged water is added to the sample, and the nitrogen content (mass%) of the sample is determined using an automatic Kjeldahl distillation apparatus (manufactured by BUCHI, K-370) to calculate the mass of the cationic groups. The mass of the skeleton of the polysaccharide polymer is calculated from the nitrogen content (mass%) and the total sample mass, and the degree of substitution of the cationic groups is calculated as a molar average by converting them into the amount of substance (mol) respectively.

[0057] 〔Calculation of the degree of substitution of the hydrocarbon group (alkyl group) of the (c) component (Zeisel method)〕 200 mg of the polysaccharide polymer pretreated by the above method and 220 mg of adipic acid are accurately weighed into a 10 mL vial (Mighty Vial No. 3), 3 mL of an internal standard solution (tetradecane / o-xylene = 1 / 25 (v / v)) and 3 mL of hydroiodic acid are added, and the vial is sealed. In addition, a calibration sample is prepared by adding 2.4 mg or 9 mg of 1-iodododecane instead of the polysaccharide polymer. While stirring each sample with a stirrer chip, it is heated at 160 °C for 2 hours using a block heater (manufactured by PIERCE, Reacti-Therm III Heating / Stirring module). After the sample is allowed to cool, the upper layer (o-xylene layer) is recovered and analyzed by gas chromatography (GC) under the following conditions (Shimadzu Corporation, QD2010plus). ·GC analysis conditions Column: Agilent HP-1 (length: 30 m, liquid phase film thickness: 0.25 μL, inner diameter: 32 mm) Split ratio: 20 Column temperature: 100 °C (2 min) → 10 °C / min → 300 °C (15 min) Injector temperature: 300 °C Detector: HID Detector temperature: 330 °C Injection volume: 2 μL From the detected amount of 1-iodododecane obtained by GC, the mass of the alkyl group in the sample is determined. From the mass of the alkyl group and the total sample mass, the mass of the polysaccharide polymer backbone is calculated, and the degree of substitution of the alkyl group is calculated as a molar average by converting each to the amount of substance (mol).

[0058] (c1) component may be a polysaccharide polymer having both a hydrocarbon group having 1 to 18 carbon atoms and a cationic group. The degree of substitution of each group in this case is as described above.

[0059] (c1) component may also have an anionic group. The ratio of the degree of substitution of the anionic group in the (c1) component to the sum of the degree of substitution of the cationic group and the degree of substitution of the hydrocarbon group having 1 to 18 carbon atoms is the degree of substitution of the anionic group / (degree of substitution of the cationic group + degree of substitution of the hydrocarbon group having 1 to 18 carbon atoms). From the viewpoints of flexibility and low-temperature stability, it is preferably 3 or less, more preferably 1.7 or less, still more preferably 1.5 or less, even more preferably 1 or less, even more preferably 0.5 or less, even more preferably 0.1 or less, and may be 0 or more, and preferably 0.

[0060] The weight average molecular weight of the polysaccharide or its derivative, which is the precursor compound of the (c1) component of the present invention, is preferably 1,000 or more, more preferably 10,000 or more, still more preferably 30,000 or more, even more preferably 50,000 or more, even more preferably 70,000 or more, even more preferably 100,000 or more, even more preferably 300,000 or more, even more preferably 500,000 or more from the viewpoints of flexibility and low-temperature stability. And from the same viewpoints, it is preferably 3,000,000 or less, more preferably 2,500,000 or less. The weight average molecular weight of this precursor compound can be calculated by polyethylene glycol conversion by GPC (gel permeation chromatography).

[0061] From the viewpoints of softness and low-temperature stability, the liquid detergent composition for textile products of the present invention contains component (c) preferably in an amount of 0.1% by mass or more, more preferably 0.2% by mass or more, and 3% by mass or less, more preferably 2% by mass or less.

[0062] From the viewpoints of softness and low-temperature stability, in the liquid detergent composition for textile products of the present invention, the mass ratio (c) / (b) of the content of component (b) to the content of component (c) is preferably 0.06 or more, more preferably 0.08 or more, still more preferably 0.1 or more, even more preferably 0.2 or more, and preferably 3 or less, more preferably 1.5 or less, still more preferably 1 or less, even more preferably 0.5 or less.

[0063] The liquid detergent composition for textile products of the present invention may contain components other than component (a), component (b) and optional component (c). The content thereof is not particularly limited as long as it is contained within a range that does not impair the effects of the present invention. Specific examples are as follows. (1) Antibacterial agents such as quaternary ammonium salts and antibacterial compounds having an aromatic ring. As the antibacterial compound having an aromatic ring, triclosan and dichlorosan are preferable, and dichlorosan is more preferable. The content of the antibacterial agent is 0.01% by mass or more, preferably 0.02% by mass or more, and 0.1% by mass or less, preferably 0.07% by mass or less in the composition of the present invention. (2) Anti-redeposition agents and dispersants such as polyacrylic acid, polymaleic acid, and carboxymethyl cellulose are 0.01% by mass or more and 10% by mass or less in the composition. (3) Bleaching agents such as hydrogen peroxide, sodium percarbonate, or sodium perborate are 0.01% by mass or more and 10% by mass or less in the composition. (4) Bleaching activators such as tetraacetylethylenediamine and bleaching activators represented by general formulas (I-2) to (I-7) of JP-A-6-316700 are 0.01% by mass or more and 10% by mass or less in the composition. (5) One or more enzymes selected from cellulase, amylase, pectinase, protease, and lipase, preferably one or more enzymes selected from amylase and protease, in the composition is 0.001% by mass or more, preferably 0.01% by mass or more, more preferably 0.1% by mass or more, still more preferably 0.3% by mass or more, and 2% by mass or less, preferably 1% by mass or less. (6) A fluorescent dye, for example, a fluorescent dye commercially available as Tinopal CBS (trade name, manufactured by Ciba Specialty Chemicals) or Whitex SA (trade name, manufactured by Sumitomo Chemical Co., Ltd.), in the composition is 0.001% by mass or more and 1% by mass or less. (7) Antioxidants such as butylhydroxytoluene, distyrenated cresol, sodium sulfite, and sodium bisulfite in the composition is 0.01% by mass or more and 2% by mass or less. (8) In addition, components such as dyes, fragrances, preservatives, antibacterial preservatives, antifoaming agents such as silicone, alkali agents, chelating agents, and softeners are used in appropriate amounts, respectively.

[0064] The liquid detergent composition for textile products of the present invention preferably contains water. Water is used in an amount such that the composition of the composition becomes 100% by mass. The detergent composition of the present invention can contain water, for example, 20% by mass or more, further 30% by mass or more, and 99% by mass or less, further 98% by mass or less, further 90% by mass or less, further 80% by mass or less.

[0065] The liquid detergent composition for textile products of the present invention preferably has a pH of 6 or more, more preferably 7 or more, and preferably 9 or less, more preferably 8 or less at 25°C from the viewpoints of softness and low-temperature stability. The pH of the composition can be measured by the measurement method in the examples described below.

[0066] The viscosity of the liquid detergent composition for textile products of the present invention is preferably 60 mPa·s or more, more preferably 80 mPa·s or more, and preferably 180 mPa·s or less, more preferably 160 mPa·s or less from the viewpoints of flexibility and low-temperature stability at 25°C. The viscosity of the liquid detergent composition for textile products of the present invention can be measured, for example, using a rotational viscometer such as a known single-cylinder viscometer with the sample at 20°C.

[0067] The fibers constituting the textile products to be washed with the liquid detergent composition for textile products of the present invention may be either hydrophobic fibers or hydrophilic fibers. Examples of hydrophobic fibers include protein-based fibers (such as milk protein casein fibers, Promix, etc.), polyamide-based fibers (such as nylon, etc.), polyester-based fibers (such as polyester, etc.), polyacrylonitrile-based fibers (such as acrylic, etc.), polyvinyl alcohol-based fibers (such as vinylon, etc.), polyvinyl chloride-based fibers (such as polyvinyl chloride, etc.), polyvinylidene chloride-based fibers (such as vinylidene, etc.), polyolefin-based fibers (such as polyethylene, polypropylene, etc.), polyurethane-based fibers (such as polyurethane, etc.), polyvinyl chloride / polyvinyl alcohol copolymer-based fibers (such as polyclaral, etc.). Examples of hydrophilic fibers include seed hair fibers (such as cotton, raw silk, kapok, etc.), bast fibers (such as hemp, flax, ramie, cannabis, jute, etc.), leaf vein fibers (such as Manila hemp, sisal hemp, etc.), palm fibers, rush, straw, animal hair fibers (such as wool, mohair, cashmere, camel hair, alpaca, vicuña, angora, etc.), silk fibers (such as domestic silk, wild silk), feathers, cellulose-based fibers (such as rayon, polynosic, cupra, acetate, etc.).

[0068] In addition, examples of textile products include fabrics such as woven fabrics, knitted fabrics, non-woven fabrics using the above-mentioned hydrophobic fibers or hydrophilic fibers, and products such as undershirts, T-shirts, dress shirts, blouses, slacks, hats, handkerchiefs, towels, knits, socks, underwear, tights, etc. obtained using them.

[0069] Although the mechanism by which the effects of the present invention are manifested has not necessarily been elucidated, it is considered as follows. The component (a) of the present invention is involved in detergency, but after washing, it is adsorbed on the surface of the textile product and is considered to be the cause of the decrease in flexibility. In the liquid detergent composition for textile products of the present invention, the component (b) having relatively high hydrophobicity is considered to be easily adsorbed on the surface of the textile product. However, due to the adsorption of the component (b) on the fiber surface after washing, gaps are formed at the adsorption sites of the component (a), and as a result, the flexibility is improved. Furthermore, when the component (c) is used in combination, since it competitively adsorbs on the surface of the textile product, the flexibility improvement effect is enhanced. Furthermore, it is considered that the flexibility improvement effect can be further enhanced because the gaps at the adsorption sites of the component (a) can be widened by adjusting the quantitative ratio of the component (b) and the component (c). In addition, the component (b) has relatively high hydrophobicity and a tendency to decrease the low-temperature stability because its solubility decreases at low temperatures. However, in the present invention, it is considered that this can be solved by selecting the component (a) having a specific structure. When the components (a1) and (a2) are used in combination, the molecular aggregation structure as the component (a) becomes a structure more advantageous for these effects, and thus the effects are considered to be more remarkable. It should be noted that the present invention is not particularly limited to the above-described mechanism of action.

[0070] [Method for washing textile products] The washing method of the present invention is a method for washing a textile product with a washing liquid obtained by mixing the liquid detergent composition for textile products of the present invention and water, and then rinsing the textile product with water. That is, the washing method of the present invention is a method for washing a textile product with a washing liquid obtained by mixing the component (a), the component (b), and optionally preferably the component (c) and water, and then rinsing the textile product with water.

[0071] The water to be mixed with the liquid detergent composition for textile products of the present invention and the water for rinsing can each be selected from the range of 1 °dH or more, further 2 °dH or more, further 3 °dH or more, and 30 °dH or less, further 25 °dH or less, further 20 °dH or less, further 18 °dH or less, and further 15 °dH or less in terms of German hardness. Here, the German hardness (°dH) in this specification refers to the concentration of calcium and magnesium in water, expressed in terms of CaCO 3 converted concentration at 1 mg / L (ppm) = approximately 0.056 °dH (1 °dH = 17.8 ppm). The concentrations of calcium and magnesium for this German hardness are determined by a chelation titration method using disodium ethylenediaminetetraacetate. The specific measurement method for the German hardness of water in this specification is shown below.

[0072] <Measurement Method for German Hardness of Water> [Reagents] · 0.01 mol / l EDTA·2Na solution: 0.01 mol / l aqueous solution of disodium ethylenediaminetetraacetate (titration solution, 0.01 M EDTA-Na2, manufactured by SIGMA-ALDRICH) · Universal BT indicator (Product name: Universal BT, manufactured by Dojindo Laboratories) · 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 making up the total volume to 1000 ml with deionized water) [Measurement of Hardness] (1) Pipette 20 ml of the water to be sampled into a conical beaker. (2) Add 2 ml of the ammonia buffer solution for hardness measurement. (3) Add 0.5 ml of the Universal BT indicator. Confirm that the solution after addition is reddish-purple. (4) While thoroughly mixing the conical beaker, dropwise add the 0.01 mol / l EDTA·2Na solution from the burette, and take the point when the water to be sampled changes color to blue as the end point of the titration. (5) The total hardness is calculated using the following formula. Hardness (°dH) = T × 0.01 × F × 56.0774 × 100 / A T: Titration volume of the 0.01 mol / l EDTA·2Na solution (mL) A: Sample volume (20 mL, volume of the water to be sampled) Factor of 0.01 mol / l EDTA·2Na solution

[0073] In the cleaning method of the present invention, the matters described in the liquid detergent composition for textile products of the present invention can be appropriately applied.

[0074] From the viewpoint of softness, the content of component (a) in the cleaning liquid is preferably 0.001% by mass or more, more preferably 0.004% by mass or more, still more preferably 0.010% by mass or more, and from the viewpoint of economy, preferably 0.2% by mass or less, more preferably 0.15% by mass or less, still more preferably 0.2% by mass or less.

[0075] From the viewpoint of softness, the mass ratio of the content of component (a1) to the total of the content of component (a1) and the content of component (a2) in the cleaning liquid, (a1) / [(a1)+(a2)], is preferably in the same range as the liquid detergent composition for textile products of the present invention. That is, this mass ratio (a1) / [(a1)+(a2)] is preferably 0.1 or more and 1 or less. (a1) / [(a1)+(a2)] may be 1. Further, when the cleaning liquid contains component (a1) and component (a2) as component (a), from the viewpoint of softness, (a1) / [(a1)+(a2)] is preferably 0.1 or more, more preferably 0.15 or more, still more preferably 0.25 or more, and preferably less than 1, more preferably 0.85 or less, still more preferably 0.80 or less, even more preferably 0.75 or less.

[0076] From the viewpoint of softness, the content of component (b) in the cleaning liquid is preferably 0.0001% by mass or more, more preferably 0.00015% by mass or more, still more preferably 0.0002% by mass or more, and preferably 0.02% by mass or less, more preferably 0.015% by mass or less, still more preferably 0.01% by mass or less.

[0077] From the perspective of softness, the mass ratio of the content of component (b) to the content of component (a) in the cleaning liquid, (b) / (a), is preferably 0.002 or more, more preferably 0.004 or more, still more preferably 0.01 or more, even more preferably 0.02 or more, even more preferably 0.035 or more, even more preferably 0.040 or more, even more preferably 0.050 or more, and preferably 0.5 or less, more preferably 0.4 or less, still more preferably 0.2 or less, even more preferably 0.1 or less.

[0078] From the perspective of softness, the content of component (c) in the cleaning liquid is preferably 0.00002% by mass or more, more preferably 0.00003% by mass or more, still more preferably 0.00004% by mass or more, and preferably 0.02% by mass or less, more preferably 0.015% by mass or less, still more preferably 0.01% by mass or less.

[0079] From the perspective of softness, the mass ratio of the content of component (c) to the content of component (b) in the cleaning liquid, (c) / (b), is preferably 0.06 or more, more preferably 0.08 or more, still more preferably 0.1 or more, even more preferably 0.2 or more, and preferably 3 or less, more preferably 1.5 or less, still more preferably 1 or less, even more preferably 0.5 or less.

[0080] From the perspective of softness, the temperature of the cleaning liquid is preferably 0°C or more, more preferably 3°C or more, still more preferably 5°C or more, and preferably 70°C or less, more preferably 60°C or less.

[0081] From the perspective of softness, the pH of the cleaning liquid at 20°C is preferably 3 or more, more preferably 4 or more, and preferably 10 or less, more preferably 9 or less. The pH of the cleaning liquid can be measured by the measurement method in the examples described below.

[0082] In recent years, washing machines have been increasing in size, and the value of the bath ratio, which is represented by the ratio of the mass (kg) of clothing to the amount of washing liquid (liters), that is, the value of the amount of washing liquid (liters) / mass of clothing (kg) (hereinafter, this ratio may also be referred to as the bath ratio) has a tendency to decrease. In the washing method of the present invention, from the viewpoint of softness, the bath ratio is preferably 2 or more, more preferably 3 or more, still more preferably 4 or more, even more preferably 5 or more, and preferably 45 or less, more preferably 40 or less, still more preferably 30 or less, even more preferably 20 or less.

[0083] In the washing method of the present invention, from the viewpoint of softness, the washing time is preferably 1 minute or more, more preferably 2 minutes or more, still more preferably 3 minutes or more, preferably 90 minutes or less, more preferably 60 minutes or less, still more preferably 30 minutes or less, even more preferably 15 minutes or less.

[0084] The method for washing fibers of the present invention is suitable for a method of immersing the fibers in a liquid used for refining while feeding the fibers with a roller or the like, and a rotary washing method. The rotary washing method means a washing method in which fibers not fixed to a rotating device rotate around a rotation axis together with a washing liquid. The rotary washing method can be carried out by a rotary washing machine. In the present invention, for example, it is preferable to wash the fibers using a rotary washing machine. Specific examples of the rotary washing machine include a drum washing machine, a pulsator washing machine, or an agitator washing machine. As these rotary washing machines, commercially available ones can be used respectively.

[0085] In the washing method of the present invention, a fiber product is washed with a predetermined washing liquid, and then the fiber product is rinsed with water. The rinsing may be carried out using water according to a known method such as washing clothes.

[0086] In addition to the above-described embodiments, the present invention discloses the following aspects. <1> A liquid detergent composition for fiber products containing the following component (a) and component (b). (a) component: One or more surfactants selected from the following component (a1) and component (a2) (a1) Component: One or more anionic surfactants selected from internal olefin sulfonates having 10 to 18 carbon atoms, sulfate esters having an alkyl or alkenyl group with 10 to 24 carbon atoms, polyoxyalkylene alkyl or alkenyl ether sulfates having an alkyl or alkenyl group with 10 to 24 carbon atoms, and sulfonates having an aliphatic alkyl or alkenyl group with 10 to 24 carbon atoms (excluding internal olefin sulfonates having 10 to 18 carbon atoms). (a2) Component: Nonionic surfactants with a Davies HLB value of 6.7 or more. (b) Component: Alcohols having 8 to 18 carbon atoms.

[0087] <2> The liquid detergent composition for textile products according to <1>, wherein the (a2) component is a nonionic surfactant selected from alcohol alkoxylates and ester alkoxylates with a Davies HLB value of 6.7 or more.

[0088] <3> The liquid detergent composition for textile products according to <1> or <2>, containing a nonionic surfactant represented by the following general formula (1) as the (a2) component and having a Davies HLB value of 6.7 or more. R 1 (CO) m O-(AO) n -R 2 (1) [In the formula, R 1 is an aliphatic hydrocarbon group having 9 to 18 carbon atoms, and R 2is a hydrogen atom or a methyl group, CO is a carbonyl group, m is a number of 0 or 1, AO is one or more alkyleneoxy groups selected from an alkyleneoxy group having 2 carbon atoms and an alkyleneoxy group having 3 carbon atoms, and AO contains at least an alkyleneoxy group having 2 carbon atoms. When AO contains an alkyleneoxy group having 2 carbon atoms and an alkyleneoxy group having 3 carbon atoms, the alkyleneoxy group having 2 carbon atoms and the alkyleneoxy group having 3 carbon atoms may be in a block type bond or a random type bond. n is the average number of moles added and is a number of 1 or more and 50 or less.

[0089] <4> The liquid detergent composition for textile products according to any one of <1> to <3>, which contains, as the component (a2), an alcohol alkoxylate represented by the following general formula (2) and having a Davies HLB value of 6.7 or more. R 11 -O-(EO) n1 -(AO) n2 -(EO) n3 -H (2) [In the formula, R 11 is an alkyl group or alkenyl group having 10 to 18 carbon atoms, EO is an ethyleneoxy group, AO is an alkyleneoxy group having 3 or 4 carbon atoms, n1, n2, and n3 are the average number of moles added of EO and AO, n1 is 0 or more and 20 or less, n2 is 1 or more and 10 or less, and n3 is 1 or more and 20 or less.

[0090] <5> The liquid detergent composition for textile products according to any one of <1> to <4>, wherein the component (b) is an alcohol selected from decanol, dodecanol, tetradecanol, and hexadecanol, preferably an alcohol selected from 1-decanol, 1-dodecanol, 1-tetradecanol, and 1-hexadecanol, more preferably an alcohol selected from 1-dodecanol and 1-tetradecanol, and still more preferably 1-dodecanol.

[0091] <6> The liquid detergent composition for textile products according to any one of <1> to <5>, containing component (a) preferably in an amount of 4% by mass or more, more preferably 20% by mass or more, and preferably 80% by mass or less, more preferably 70% by mass or less, still more preferably 60% by mass or less.

[0092] <7> The liquid detergent composition for textile products according to any one of <1> to <6>, wherein (b) / (a), which is the mass ratio of the content of component (a) to the content of component (b), is preferably 0.002 or more, more preferably 0.004 or more, still more preferably 0.01 or more, even more preferably 0.02 or more, even more preferably 0.035 or more, even more preferably 0.040 or more, even more preferably 0.050 or more, and preferably 0.5 or less, more preferably 0.4 or less, still more preferably 0.2 or less, even more preferably 0.1 or less.

[0093] <8> The liquid detergent composition for textile products according to any one of <1> to <7>, further containing the following component (c). Component (c): A polymer having a water hydration amount of 6 g or more per 1 g of the polymer

[0094] <9> The liquid detergent composition for textile products according to <8>, wherein component (c) is one or more polysaccharide polymers having a water hydration amount of 6 g or more per 1 g of the polymer and having one or more groups selected from a hydrocarbon group having 1 to 18 carbon atoms and a cationic group (hereinafter referred to as component (c1)).

[0095] <10> The liquid detergent composition for textile products according to <9>, wherein component (c1) is a polysaccharide polymer in which one or more groups selected from a cationic group and a hydrocarbon group having 1 to 18 carbon atoms are bonded to a group obtained by removing a hydrogen atom from a hydroxyl group of a polysaccharide or its derivative, which is a precursor compound of component (c1), directly or via a linking group.

[0096] <11> The degree of substitution of the cationic group of the component (c1) is preferably 0.001 or more, more preferably 0.005 or more, still more preferably 0.01 or more, and preferably 1 or less, more preferably 0.7 or less, still more preferably 0.4 or less, even more preferably 0.35 or less, even more preferably 0.3 or less, even more preferably 0.25 or less, and even more preferably 0.2 or less. The liquid detergent composition for textile products according to <9> or <10>.

[0097] <12> The component (c1) is a polysaccharide polymer having both a hydrocarbon group having 1 to 18 carbon atoms and a cationic group. The liquid detergent composition for textile products according to any one of <9> to <11>.

[0098] <13> The weight average molecular weight of the polysaccharide or its derivative which is the precursor compound of the component (c1) is preferably 1,000 or more, more preferably 10,000 or more, still more preferably 30,000 or more, even more preferably 50,000 or more, even more preferably 70,000 or more, even more preferably 100,000 or more, even more preferably 300,000 or more, and even more preferably 500,000 or more, and preferably 3,000,000 or less, more preferably 2,500,000 or less. The liquid detergent composition for textile products according to any one of <9> to <12>.

[0099] <14> The mass ratio of the content of the component (b) to the content of the component (c), (c) / (b), is preferably 0.06 or more, more preferably 0.08 or more, still more preferably 0.1 or more, even more preferably 0.2 or more, and preferably 3 or less, more preferably 1.5 or less, still more preferably 1 or less, and even more preferably 0.5 or less. The liquid detergent composition for textile products according to any one of <8> to <13>.

[0100] <15> (a1) / [(a1)+(a2)], which is the mass ratio of the content of component (a1) to the total content of component (a1) and component (a2), is 1 or less, or 0.1 or more, further 0.15 or more, further 0.25 or more, and 1 or less, further less than 1, further 0.85 or less, further 0.80 or less, further 0.75 or less, and is the liquid detergent composition for textile products according to any one of <1> to <14>.

[0101] <16> The liquid detergent composition for textile products according to any one of <1> to <15> contains component (a1) and component (a2) as component (a).

[0102] <17> The liquid detergent composition for textile products according to any one of <1> to <16> contains component (b), preferably 0.1% by mass or more, more preferably 0.4% by mass or more, further preferably 0.5% by mass or more, and preferably 5% by mass or less, more preferably 4.5% by mass or less.

[0103] <18> For component (a2), the Davies HLB value is 6.7 or more, preferably 7.0 or more, more preferably 7.5 or more, further preferably 8.0 or more, still more preferably 8.5 or more, and preferably 12.0 or less, more preferably 11.0 or less, further preferably 10.5 or less, still more preferably 10.0 or less, and is the liquid detergent composition for textile products according to any one of <1> to <17>.

[0104] <19> The total amount of surfactants in the liquid detergent composition for textile products is preferably 4% by mass or more, more preferably 20% by mass or more, and preferably 80% by mass or less, more preferably 70% by mass or less, further preferably 60% by mass or less, and is the liquid detergent composition for textile products according to any one of <1> to <18>.

[0105] <20> In the total surfactant, the proportion of the component (a) is preferably 40% by mass or more, more preferably 60% by mass or more, still more preferably 80% by mass or more, even more preferably 90% by mass or more, even more preferably 95% by mass or more, and 100% by mass or less, or 100% by mass, and is the liquid detergent composition for textile products according to any one of <1> to <18>.

[0106] <21> A method for washing a textile product, which comprises washing the textile product with a washing liquid obtained by mixing the liquid detergent composition for textile products according to any one of <1> to <20> and water, and then rinsing the textile product with water.

[0107] <22> In the washing liquid, the content of the component (a) is preferably 0.001% by mass or more, more preferably 0.004% by mass or more, still more preferably 0.010% by mass or more, and preferably 0.2% by mass or less, more preferably 0.15% by mass or less, still more preferably 0.2% by mass or less, and is the method for washing a textile product according to <21>.

[0108] <23> In the washing liquid, the content of the component (b) is preferably 0.0001% by mass or more, more preferably 0.00015% by mass or more, still more preferably 0.0002% by mass or more, and preferably 0.02% by mass or less, more preferably 0.015% by mass or less, still more preferably 0.01% by mass or less, and is the method for washing a textile product according to <21> or <22>.

[0109] <24> In the washing liquid, the content of the component (c) is preferably 0.00002% by mass or more, more preferably 0.00003% by mass or more, still more preferably 0.00004% by mass or more, and preferably 0.02% by mass or less, more preferably 0.015% by mass or less, still more preferably 0.01% by mass or less, and is the method for washing a textile product according to any one of <21> to <23>.

Examples

[0110] The components used in the examples and comparative examples are as follows. <Blending components> Component (a) Component (a1) C16IOS: Potassium salt of internal olefin sulfonic acid with 16 carbon atoms Component (a1-1) was obtained by referring to the method described in the production example of JP 2014-76988 using internal olefins with 16 carbon atoms. The mass ratio of olefin form (potassium olefin sulfonate) / hydroxy form (potassium hydroxyalkane sulfonate) in the obtained potassium salt of internal olefin sulfonic acid of (a1-1) was 17 / 83. The mass ratio of the positional distribution of sulfonic acid groups of the hydroxy form in (a-1) was 1st / 2nd / 3rd / 4th / 5th / 6-9th = 2.3% / 23.6% / 18.9% / 17.5% / 13.7% / 11.2% / 6.4% / 6.4% / 0% (total 100% by mass).

[0111] The mass ratio of the positional distribution of sulfonic acid groups in the internal olefin sulfonate was measured by high performance liquid chromatography / mass spectrometer (HPLC-MS). Specifically, the hydroxy form to which the sulfonic acid group was bonded was separated by high performance liquid chromatography (HPLC), and each was identified by applying it to a mass spectrometer (MS). As a result, each ratio was determined from the HPLC-MS peak area. In this specification, each ratio determined from the peak area was calculated as the mass ratio. The apparatus and conditions used for the measurement were as follows. HPLC apparatus "LC-20ASXR" (manufactured by Shimadzu Corporation), column "ODS Hypersil (registered trademark)" (4.6×250 mm, particle size: 3 μm, manufactured by Thermo Fisher Scientific), sample preparation (diluted 1000-fold with methanol), eluent A (water added with 10 mM ammonium acetate), eluent B (methacrylonitrile / water = 95 / 5 (v / v) solution added with 10 mM ammonium acetate), gradient (0 min (A / B = 60 / 40) → 15.1 - 20 min (30 / 70) → 20.1 - 30 min (60 / 40)), MS apparatus "LCMS-2020" (manufactured by Shimadzu Corporation), ESI detection (anion detection m / z: 321.10 (component (a) with 16 carbon atoms), column temperature (40 °C), flow rate (0.5 mL / min), injection volume (5 μL)

[0112] The mass ratio of the hydroxy form to the olefin form of the internal olefin sulfonate was measured by HPLC-MS. Specifically, the hydroxy form and the olefin form were separated by HPLC and then identified by subjecting each to MS. As a result, the respective ratios were determined from the HPLC-MS peak areas. The apparatus and conditions used for the measurement were as follows. HPLC apparatus (trade name: Agilent Technologies 1100, manufactured by Agilent Technologies), column (trade name: L-column ODS 4.6×150 mm, manufactured by the Chemical Substances Evaluation and Research Institute, Incorporated Administrative Agency), sample preparation (diluted 1000-fold with methanol), eluent A (water added with 10 mM ammonium acetate), eluent B (methanol added with 10 mM ammonium acetate), gradient (0 min (A / B = 30 / 70%) → 10 min (30 / 70%) → 55 min (0 / 100%) → 65 min (0 / 100%) → 66 min (30 / 70%) → 75 min (30 / 70%)), MS apparatus (trade name: Agilent Technologies 1100MS SL (G1946D)), MS detection (anion detection m / z 60 - 1600, UV 240 nm)

[0113] Also, an α-olefin sulfonate having an aliphatic hydrocarbon group with a specific number of carbon atoms was added as a specified amount of external standard to the component (a), and the mass of the component (a) was calculated by comparing the peak area of the α-olefin sulfonate with the peak area of the component (a). The number of moles of the component (a) was calculated from the molecular weight of the component (a). The molecular weight of the component (a) was calculated in the acid form. The molecular weight of the olefin form of the internal olefin sulfonate is 304.5, and the molecular weight of the HAS form is 322.6.

[0114] C12AS: Sodium lauryl sulfate C12ApES: Polyoxyethylene (2.0) polyoxypropylene (2.0) alkyl (C12-14) ether sulfuric acid monoethanolammonium (the alkyl group is a mixed alkyl group with a mass ratio of lauryl group / myristyl group of 7 / 3, the average number of carbon atoms of the alkyl group is 12.6, the average added mole number of propyleneoxy group is 2.0, and the average added mole number of ethyleneoxy group is 2.0) C12ApS: Sodium polyoxyethylene propylene lauryl ether sulfate [obtained by adding an average of 0.6 moles of propylene oxide to 1 mole of natural alcohol with an alkyl chain of C8:C10:C12 = 5:5:90 (mass ratio, the number following C represents the number of carbon atoms), sulfating it with sulfur trioxide, and then neutralizing it with an aqueous sodium hydroxide solution (neutralized until the pH of a 10% dilution with water reaches 11).]

[0115] (a2) component C12EO9PO2EO9: Polyoxyethylene·polyoxypropylene·polyoxyethylene lauryl ether (the average added mole number of oxyethylene groups is 9 moles and 9 moles, the average added mole number of oxypropylene groups is 2, Davies' HLB value 8.8) C12EO20: Polyoxyethylene lauryl ether (the average added mole number of oxyethylene groups is 20 moles, Davies' HLB value 9.8)

[0116] (a’) component C12LAS: Sodium dodecylbenzenesulfonate, Neoperex G-25 (manufactured by Kao Corporation) C12EO10: Polyoxyethylene lauryl ether, Emulgen 110 (manufactured by Kao Corporation) (average number of moles of added oxyethylene groups: 10 moles, Davies HLB value 6.5)

[0117] (b) Component: 1-Dodecanol, Kao Corporation, Calcohol 2098

[0118] (c) Component: AC-HEC, Alkyl cationized hydroxyethyl cellulose (average molecular weight: about 150,000, water hydration amount per 1 g of polymer: 12 g, polymer obtained in the following synthesis example)

[0119] <Synthesis Example of AC-HEC> 90 g of hydroxyethyl cellulose (Ashland, Natrosol 250 JR, weight average molecular weight: 150,000, degree of substitution (MS) of hydroxyethyl group: 2.5) was placed in a 1 L separatory flask, and a nitrogen flow was carried out. 77.2 g of ion-exchanged water and 414.5 g of isopropyl alcohol (hereinafter referred to as IPA) were added, and after stirring for 5 minutes, 10.9 g of a 48% aqueous sodium hydroxide solution was added, and stirring was continued for another 15 minutes. Next, 3.6 g of lauryl glycidyl ether (Yokkaichi Gosei Co., Ltd., LA-EP) was added, and an alkylation reaction was carried out at 80 °C for 13 hours. Further, 14.5 g of glycidyl trimethylammonium chloride (Sakamoto Yakuhin Kogyo Co., Ltd., SY-GTA80) was added, and a cationization reaction was carried out at 50 °C for 1.5 hours. Thereafter, 10.9 g of a 90% aqueous acetic acid solution was added, and a neutralization reaction was carried out by stirring for 30 minutes. The obtained suspension was evenly transferred to two 500 mL centrifuge tubes, and centrifugation was carried out using a high-speed cooling centrifuge (Hitachi Koki Co., Ltd., CR21G III). The supernatant was removed by decantation, and an 85% IPA aqueous solution in the same amount as the removed supernatant was added for redispersion. Again, the operations of centrifugation and redispersion were repeated, and after the third centrifugation, the precipitate was taken out. The obtained precipitate was dried under reduced pressure at 80 °C overnight using a vacuum dryer (Advantec, VR-420), and was crushed by an Extractor Mill (Waring, MX-1200XTM) to obtain AC-HEC as a powdery cellulose derivative composition. The degree of substitution of the lauryl group of the obtained AC-HEC was 0.018, the degree of substitution of the cationic group was 0.109, and the water hydration amount per 1 g of the AC-HEC was 12 g.

[0120] The degree of substitution of the lauryl group and the degree of substitution of the cationic group of AC-HEC were measured by the above-mentioned method, respectively. Further, the weight average molecular weight of the precursor compound of AC-HEC was measured by the following method. ·Measurement of weight average molecular weight The weight average molecular weight of hydroxyethyl cellulose (HEC), which is the precursor compound of AC-HEC, was calculated by polyethylene glycol conversion by GPC (gel permeation chromatography). The measurement conditions are as follows. ·Column: TSKgel α-M · Eluent: 50 mmol / L LiBr, 1% CH 3 COOH, ethanol / water = 3 / 7 · Temperature: 40 °C · Flow rate: 0.6 mL / min

[0121] (1) Method for measuring pH Connect a combined electrode for pH measurement (glass folding sleeve type manufactured by HORIBA) to a pH meter (pH / ion meter F-23 manufactured by HORIBA) and turn on the power. As the internal solution of the pH electrode, use a saturated potassium chloride aqueous solution (3.33 mol / L). Next, fill 100 mL beakers 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) respectively, and immerse them in a constant temperature bath at 25 °C for 30 minutes. Immerse the pH measurement electrode in the temperature-adjusted standard solution for 3 minutes, and perform calibration operations in the order of pH 6.86 → pH 9.18 → pH 4.01. Adjust the sample to be measured (liquid detergent composition for textile products) to 25 °C, immerse the electrode of the above pH meter in the sample, and measure the pH after 1 minute.

[0122] (2) Preparation of liquid detergent composition for textile products The preparation method of the liquid detergent composition for textile products shown in Table 1 is as follows. Put a 5 cm long Teflon (registered trademark) stirrer piece into a 200 mL glass beaker and measure its mass. Next, add 20 g of ion-exchanged water, components (a1), (a2), (b), and (c), and while stirring at 100 r / min, add monoethanolamine or hydrochloric acid so that the pH of the composition becomes 8, and add ion-exchanged water so that the total amount becomes 100 g. After stirring at 100 r / min for 15 minutes, it was made into a liquid detergent composition for textile products.

[0123] (3) Softness (3-1) Pretreatment of textile products for evaluation Generally, treatment agents such as spinning oils used during the spinning of cotton yarns for cotton towels and lubricants used during the production of cotton towels adhere to commercially available cotton towels. In this evaluation, in order to eliminate the influence of such treatment agents, cotton towels, which are the fiber products for evaluation, were pretreated by the method shown below. The pretreatment in this evaluation includes a treatment operation performed for the purpose of reducing the amount of treatment agents adhering to commercially available cotton towels by the washing operation shown below.

[0124] Twenty-four cotton towels (manufactured by Takei Towel Co., Ltd., TW-220, 100% cotton) were subjected to the following washing operation and dried for 24 hours in an environment of 23°C and 45% RH. The washing operation consisted of washing operation (1) and washing operation (2). Washing operation (1) was performed by continuously washing twice using a surfactant in the standard course of a fully automatic washing machine (NA-F702P manufactured by National). In washing operation (1), 4.7 g of Emalgen 108 (manufactured by Kao Corporation, nonionic surfactant) was used as the surfactant during the washing of this standard course. Also, the conditions of the standard course adopted in washing operation (1) were a water volume of 47 L, a water temperature of 20°C, a washing time of 9 minutes, rinsing twice, and dehydration for 3 minutes. Also, washing operation (2) was performed by repeating the washing operation three times under the same conditions as washing operation (1) after washing operation (1), except that no surfactant was used during the washing of the standard course. In this pretreatment, a series of washing operations consisting of washing operation (1) and washing operation (2) under these conditions was performed.

[0125] (3-2) Treatment of Fiber Products for Evaluation 6.0 L of city water (3.5°dH, calculated by the above method for measuring water hardness, 20°C) was poured into a National electric bucket-type washing machine (model number "N-BK2"), 2 g of the liquid detergent composition for textile products described in the examples or comparative examples in the table was added, and the mixture was stirred for 1 minute. Then, two cotton towels (140 g) pretreated by the above method were added and processed for 3 minutes. After the treatment, dehydration was carried out for 1 minute using a Hitachi two-layer washing machine (model number "PS-H35L"). Next, 6.0 L of the above city water was poured into the bucket washing machine, and the cotton towel after dehydration in the Hitachi two-layer washing machine was added and rinsed for 3 minutes. Then, the same dehydration treatment was carried out for 1 minute using the two-layer washing machine. After performing this treatment a total of 3 times, it was left to dry for 12 hours under the conditions of 20°C and 43% RH.

[0126] (3-3) Evaluation method The softness of the cotton towel after drying was scored by 5 experts in the evaluation of fabric texture according to the following criteria, and the average score of the 5 people was calculated to 2 significant figures by rounding. At that time, the treatment in (3-2) was performed respectively with the composition of Example 7 and the composition of Comparative Example 2. Example 7 was defined as standard 2, and Comparative Example 2 was defined as standard 1. The softness of the cotton towels treated with the compositions of other examples and comparative examples was compared and scored as follows. Regarding the method of scoring, the median value of each score was allowed, for example, 0.5 was allowed between 0 and 1. Note that standard 2 finished softer than standard 1. -1… It did not finish softer than the cotton towel treated with the composition of standard 1. 0… It finished with the same softness as the cotton towel treated with the composition of standard 1. 1… It finished softer than standard 1 but did not reach the softness level midway between standard 1 and standard 2. 2… It finished with the softness level midway between standard 1 and standard 2. 3… It finished with the same softness as the cotton towel treated with the composition of standard 2. 4… It finished softer than the cotton towel treated with the composition of standard 2. The evaluation results were shown in a table. It can be judged that a liquid detergent composition for textile products with an average score exceeding 0 imparts good softness, and the larger the average score, the more preferable the liquid detergent composition for textile products.

[0127] (4) Low-temperature stability 30 g of the liquid detergent composition for textile products in the table was put into a No. 6 glass standard bottle and stored in a thermostat at -5°C for 20 days. During the storage period, the standard bottle was taken out of the thermostat every day, and after 20 seconds, the appearance of the content was visually observed. The low-temperature stability was evaluated according to the following criteria. 〇: Maintained a transparent and suspension-free state for 20 days. △: Maintained a transparent and suspension-free state from the second day to the third day, but became turbid on the fourth day. ×: Precipitates occurred on the first day.

[0128]

Table 1

Claims

1. It contains 20% by mass or more and 70% by mass or less of the following component (a) and 0.1% by mass or more and 5% by mass or less of the following component (b). In all the surfactants contained in the composition, the proportion of component (a) is 90% by mass or more and 100% by mass or less. When component (a) contains component (a1), (a1) / [(a1) + (a2)], which is the mass ratio of the content of component (a1) to the total of the content of component (a1) and the content of component (a2), is 0.1 or more and 1 or less. A liquid detergent composition for textile products. Component (a): One or more surfactants selected from the following components (a1) and (a2) Component (a1): One or more anionic surfactants selected from internal olefin sulfonates having 10 to 18 carbon atoms, sulfate esters having an alkyl or alkenyl group having 10 to 24 carbon atoms, polyoxyalkylene alkyl or alkenyl ether sulfate esters having an alkyl or alkenyl group having 10 to 24 carbon atoms, and sulfonates having an aliphatic alkyl or alkenyl group having 10 to 24 carbon atoms (however, excluding internal olefin sulfonates having 10 to 18 carbon atoms) Component (a2): A nonionic surfactant having a Davies HLB value of 8.5 or more and 12.0 or less Component (b): 1-dodecanol

2. For the liquid detergent composition for textile products according to Claim 1, (b) / (a), which is the mass ratio of the content of component (b) to the content of component (a), is 0.002 or more and 0.5 or less.

3. The liquid detergent composition for textile products according to Claim 1 or 2, further containing the following component (c). Component (c): A polymer having a water hydration amount of 6 g or more per 1 g of the polymer

4. For the liquid detergent composition for textile products according to Claim 3, (c) / (b), which is the mass ratio of the content of component (c) to the content of component (b), is 0.06 or more and 3 or less.

5. The liquid detergent composition for textile products according to any one of Claims 1 to 4, containing component (a1) and component (a2) as component (a).

6. A method for washing textile products, which comprises washing the textile products with a washing liquid obtained by mixing the liquid detergent composition for textile products according to any one of Claims 1 to 5 and water, and then rinsing the textile products with water.

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