JP6670178B2 - How to wash textiles - Google Patents

Description

  The present invention relates to a method for washing textile products, a method for treating textile products, and a method for suppressing a decrease in texture of textile products.

  Conventionally, anionic surfactants are widely used as household cleaning components because of their excellent detergency and foaming power. As one of the anionic surfactants other than the alkylbenzene sulfonate, an olefin sulfonate, particularly an internal olefin sulfonate obtained from an internal olefin having a double bond at the end of the olefin chain, not at the end, has been reported. ing. Further, in a method of washing textiles, a washing method of washing textiles with a detergent composition containing an anionic surfactant and then softening the textiles with a softener composition for textiles is also a general washing method. It is done at home.

  Patent Document 1 contains (A) an internal olefin sulfonate having 16 carbon atoms and / or (B) an internal olefin sulfonate having 18 carbon atoms, and the content mass of the component (A) and the component (B). An internal olefin sulfonate composition having a ratio (A / B) of 0/100 to 70/30, and particularly excellent foaming properties, foaming properties, quick foaming properties, foam removing properties, and especially foaming properties during hair washing Is disclosed.

  Patent Document 2 discloses a detergent composition excellent in detergency, containing an internal olefin sulfonate containing 25% or more of a β-hydroxy compound. It is described that the carbon number of the internal olefin sulfonate is preferably 12 to 20. Specifically, a method for cleaning dirt attached to a polyester / cotton cloth product is disclosed.

  Patent Literature 3 describes a detergent composition containing an internal olefin sulfonate derived from an internal olefin having 12 to 18 carbon atoms and a nonionic surfactant having an HLB value of 10.5 or less at a specific ratio. ing. In Examples, cleaning evaluation with water whose ionic strength is adjusted with sodium chloride and sodium carbonate using an internal olefin sulfonate having 18 carbon atoms is described as a comparative example.

  Patent Document 4 discloses a pool rinsing process in which a textile product is washed with a detergent containing a specific nonionic surfactant and an anionic surfactant in a specific ratio, and then the textile product is treated with rinsing water containing a textile product treating agent. Which is a method for washing textiles, which is excellent in water saving without impairing the detergency and flexibility.

  Patent Document 5 contains a compound selected from a tertiary amine having a specific number of carbon atoms or a salt thereof and a quaternary ammonium salt, and has an excellent softening effect even when treated with rinse water having a large residual amount of detergent. The indicated liquid softener composition is disclosed.

JP 2014-76988 A European Patent Publication No. 377261 JP-A-3-126793 JP 2011-47065 A JP 2005-23452 A

  The present invention provides a method for washing textiles, which can impart a good texture such as flexibility after washing the textiles.

  The present inventors have found that, after washing a textile with an anionic surfactant, the textile is treated with a finishing composition for textiles to impart a texture to the textile. It has been found that by using an acid salt, it is possible to suppress a decrease in the effect of imparting a texture to a textile product to a textile product originally included in the textile product finish composition.

The present invention relates to a method for washing textiles, comprising the following steps 1 and 2.
Step 1: washing a textile product by contacting a washing liquid obtained by mixing water and (A) an internal olefin sulfonate having 14 to 16 carbon atoms with a textile product, and washing the textile product. A step of treating the textile by contacting the treatment liquid obtained by mixing the finishing composition with the textile which has been washed in step 1

In addition, the present invention relates to a method for treating a fiber product, which includes the following steps 1 and 2.
Step 1: washing a textile product by contacting a washing liquid obtained by mixing water and (A) an internal olefin sulfonate having 14 to 16 carbon atoms with a textile product, and washing the textile product. A step of treating the textile by contacting the treatment liquid obtained by mixing the finishing composition with the textile which has been washed in step 1

In addition, the present invention provides, when treating a textile product in a step including the following steps 1 and 2, as the anionic surfactant in step 1 (A) an internal olefin sulfonate having 14 to 16 carbon atoms [ Hereinafter, referred to as "component (A)"].
Step 1: A washing liquid obtained by mixing water and an anionic surfactant is washed by bringing a textile into contact with the textile. Step 2: A washing liquid obtained by mixing water with a finishing composition for textile. A step of treating the textile by contacting the treatment liquid with the textile washed in step 1

  According to the present invention, after treating a textile product, after treating the textile product with the textile product finish composition, the textile product finish composition suppresses a decrease in the effect of imparting texture to the fiber. Can be.

<(A) component>
The component (A) of the present invention is an internal olefin sulfonate having a carbon number of 14 or more and 16 or less, and has an action of cleaning dirt attached to fibers. The carbon number of the internal olefin sulfonate in the component (A) represents the carbon number of the internal olefin to which the sulfonate is covalently bonded. The number of carbon atoms of the internal olefin sulfonate having 14 to 16 carbon atoms is 14 or more, preferably 15 or more, and 16 or less from the viewpoint of further improving the cleaning property of the dirt attached to the fibers.

  The internal olefin sulfonate of the present invention is obtained by sulfonating, neutralizing and hydrolyzing an internal olefin having 14 to 16 carbon atoms (an olefin having a double bond in the olefin chain) as a raw material. Acid salt.

  Such an internal olefin includes a case where a so-called alpha olefin (hereinafter, also referred to as α-olefin) in which a double bond is located at the first position of the carbon chain is contained in a small amount. Further, when the internal olefin is sulfonated, β-sultone is quantitatively generated, and a part of the β-sultone is changed to γ-sultone and olefin sulfonic acid. It is converted into an alkane sulfonate and an olefin sulfonate (for example, J. Am. Oil Chem. Soc. 69, 39 (1992)). Here, the hydroxy group of the obtained hydroxyalkanesulfonate is inside the alkane chain, and the double bond of the olefinsulfonate is inside the olefin chain. The obtained product is mainly a mixture thereof, and part of the product is a hydroxyalkanesulfonic acid salt having a hydroxy group at the terminal of a carbon chain, or an olefin having a double bond at the terminal of a carbon chain. A small amount of a sulfonate may be contained.

  In the present specification, these products and their mixtures are collectively referred to as internal olefin sulfonates (component (A)). The hydroxyalkane sulfonate is referred to as a hydroxy form of an internal olefin sulfonate (hereinafter, also referred to as HAS), and the olefin sulfonate is referred to as an olefin form of an internal olefin sulfonate (hereinafter, also referred to as IOS).

  The mass ratio of HAS to IOS of the compound in the component (A) can be measured by a high performance liquid chromatography mass spectrometer (hereinafter abbreviated as HPLC-MS). Specifically, the mass ratio can be determined from the HPLC-MS peak area of the component (A).

  Examples of the salt of the internal olefin sulfonate of the component (A) include an alkali metal salt, an alkaline earth metal (1/2 atom) salt, an ammonium salt, and 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 alkanol ammonium salt having 2 to 6 carbon atoms.

In the component (A), the content of the internal olefin sulfonate having a sulfonic acid group at the fifth or higher position is preferred from the viewpoint of suppressing a decrease in the effect of imparting a texture to the textile by the textile finishing agent. Is 10% by mass or more, more preferably 15% by mass or more, still more preferably 20% by mass or more, and still more preferably 25% by mass or more, and the improvement of the detergency of dirt attached to the fiber. From the viewpoint, the content is preferably 55% by mass or less, more preferably 50% by mass or less, and further preferably 45% by mass or less.
In the component (A), the content of the olefin sulfonate in which the sulfonic acid group is present at the first position is determined from the viewpoint of suppressing a decrease in the effect of imparting a texture to the textile with the textile finishing agent composition. A) In the component, preferably 10% by mass or less, more preferably 7% by mass or less, still more preferably 5% by mass or less, and still more preferably 3% by mass or less. From the viewpoint, it is preferably 0.01% by mass or more.
The position of the sulfonic acid group in these compounds is the position in the olefin chain or alkane chain.

  The internal olefin sulfonate can be a mixture of a hydroxy form and an olefin form. The mass ratio of the content of the olefin of the internal olefin sulfonate to the content of the hydroxy of the internal olefin sulfonate (olefin / hydroxy) in the component (A) is 0/100 or more, and more preferably 5/100. It can be 95 or more, and 50/50 or less, further 40/60 or less, further 30/70 or less, and further 25/75 or less.

  The mass ratio of the content of the hydroxy form of the internal olefin sulfonate to the content of the olefin form of the internal olefin sulfonate in the component (A) was such that the hydroxy form and the olefin form were separated from the component (A) by HPLC. Thereafter, it can be measured by the method described in Examples.

The component (A) can be produced by sulfonating, neutralizing, and hydrolyzing an internal olefin having 14 to 16 carbon atoms as a raw material.
Sulfonation can be performed by reacting 1.0 to 1.2 moles of sulfur trioxide gas with respect to 1 mole of internal olefin. The reaction temperature can be from 20 to 40 ° C.
Neutralization is carried out by reacting an aqueous solution of an alkali such as sodium hydroxide, ammonia, or 2-aminoethanol in a molar amount of 1.0 to 1.5 times the theoretical value of the sulfonic acid group.
The hydrolysis may be carried out in the presence of water at 90 to 200 ° C. for 30 minutes to 3 hours.
These reactions can be performed continuously. After completion of the reaction, purification can be performed by extraction, washing, or the like.

  In producing the internal olefin sulfonate of the component (A), sulfonation, neutralization, and hydrolysis may be performed using a raw material internal olefin having a distribution of 14 to 16 carbon atoms. Sulfonation, neutralization, and hydrolysis may be performed using a raw material internal olefin having one carbon number, and a plurality of types of internal olefin sulfonates having different carbon numbers prepared in advance may be used as necessary. You may mix.

  In the present invention, an internal olefin refers to an olefin having a double bond inside an olefin chain as described above. The carbon number of the internal olefin as the raw material of the component (A) is 14 or more and 16 or less. The internal olefin used for the component (A) may be used alone or in combination of two or more.

The total content of the olefin in which the double bond exists at the first position in the raw material internal olefin, that is, the so-called alpha olefin, is from the viewpoint of suppressing a decrease in the effect of imparting texture to the textile with the finishing composition for textile, ( A) In the component, preferably 10% by mass or less, more preferably 7% by mass or less, still more preferably 5% by mass or less, and still more preferably 3% by mass or less. From the viewpoint, it is preferably 0.01% by mass or more.
The content of the olefin having a double bond at the fifth or higher position in the raw material internal olefin is preferably 10% by mass or more from the viewpoint of suppressing a decrease in the effect of imparting a texture to the textile by the textile finishing agent. Yes, more preferably at least 15% by mass, even more preferably at least 20% by mass, even more preferably at least 25% by mass, and preferably from the viewpoint of improving the cleanability of stains attached to the fibers. It is 60% by mass, more preferably 55% by mass or less, further preferably 50% by mass or less, and still more preferably 45% by mass or less. In addition, the maximum value of the position of the double bond in the raw material internal olefin varies depending on the number of carbon atoms.

The distribution of double bonds in the raw material internal olefin can be measured by, for example, a gas chromatograph mass spectrometer (hereinafter abbreviated as GC-MS). Specifically, each component having a different carbon chain length and double bond position is accurately separated by a gas chromatograph analyzer (hereinafter abbreviated as GC), and subjected to a mass spectrometer (hereinafter abbreviated as MS). The position of the double bond can be identified, and each ratio can be determined from the GC peak area. The method for measuring the position of the double bond in the internal olefin of the raw material is described below.
<Measuring method of double bond position of olefin inside raw material>
The position of the double bond in the internal olefin is measured by gas chromatography (hereinafter abbreviated as GC). Specifically, after the internal olefin is reacted with dimethyl disulfide to obtain a dithiolated derivative, each component is separated by GC. As a result, the double bond position of the internal olefin is determined from each peak area.
The apparatus used for the measurement and the analysis conditions are as follows.
GC device "HP6890" (manufactured by HEWLETT PACKARD),
Column “Ultra-Alloy-1HT capillary column” (30 m × 250 μm × 0.15 μm, manufactured by Frontier Lab Co., Ltd.)
Detector (flame flame ion detector (FID)),
Injection temperature 300 ° C,
Detector temperature 350 ° C,
He flow rate 4.6 mL / min

<Finishing composition for textile products>
Next, the finishing composition for textile products used in the step 2 will be described.
The finishing composition for textiles used in the present invention is preferably a finishing composition for textiles containing a cationic surfactant. For example, the cationic surfactant includes a cationic surfactant which is a tertiary amine salt and a cationic surfactant which is a quaternary ammonium salt. Examples of the cationic surfactant include the following component (B).
Component (B): a compound represented by the following general formula (1).

[In the general formula (1), R ¹ is a hydrocarbon group having a total carbon number of 16 or more and 24 or less which may be separated by an ester group and / or an amide group. R ² and R ³ each independently represent a hydrocarbon group having a total of 16 to 24 carbon atoms, which may be separated by an ester group and / or an amide group, a hydroxyalkyl group having 1 to 3 carbon atoms, It is an alkyl group having a number of 1 to 3. R ⁴ is a hydrogen atom or an alkyl group having 1 to 3 carbon atoms. X ^- is an anionic group. ]

In the general formula (1), R ¹ is a total of 16 or more and 24 or less which may be separated by an ester group and / or an amide group, and preferably 16 or more and 22 or less, more preferably 16 or less from the viewpoint of improving flexibility. It is a hydrocarbon group of 20 or more, and the hydrocarbon group is a saturated hydrocarbon group or an unsaturated hydrocarbon group. R ² and R ³ each independently represent a hydroxyalkyl group having 1 to 3 carbon atoms, preferably a hydroxyethyl group, an alkyl group having 1 to 3 carbon atoms, preferably a methyl group, an ethyl group, or an ester group. And / or a total of 16 to 24 carbon atoms, which may be separated by an amide group, and preferably 16 to 22 or less, more preferably 16 to 20 or less, from the viewpoint of improving flexibility, The groups are a saturated hydrocarbon group and an unsaturated hydrocarbon group. R ⁴ is a hydrogen atom or an alkyl group having 1 to 3 carbon atoms. X ^- is a halogen ion, a sulfate ion, and a number of 1 to 12 fatty acids or C 1 to 3 alkyl sulfate ion such as carbon atoms.

  The compound represented by the general formula (1) is prepared by selecting the composition of a hydrocarbon group of a fatty acid or a fatty acid lower alkyl (alkyl group having 1 to 3 carbon atoms) ester and a raw material having a specific number of moles having such a composition. A fatty acid or a fatty acid lower alkyl (having 1 to 3 carbon atoms in the alkyl group) ester and a corresponding alkanolamine are produced by a dehydration esterification reaction or a transesterification reaction, and a quaternization reaction using an alkylating agent is carried out. It can be produced by a neutralization reaction using an acid agent.

  As the alkanolamine, dialkylmonoalkanolamine, preferably dimethylmonoethanolamine or dimethylmonopropanolamine, monoalkyldialkanolamine, preferably methyldiethanolamine or methyldipropanolamine, or trialkanolamine, preferably triethanolamine or Include, but are not limited to, tripropanolamine. More preferred alkanolamines are trialkanolamines.

  In order to control the content of the unsaturated hydrocarbon group having two or more double bonds in the raw material fatty acid or fatty acid lower alkyl ester, crystallization as described in, for example, JP-A-4-306296 is used. A method of distilling a methyl ester under reduced pressure as described in JP-A-6-41578, a selective hydrogenation reaction as described in JP-A-8-99036, and the like.

  In the esterification reaction or transesterification reaction, the molar ratio of the fatty acid or the lower alkyl ester of the fatty acid to the hydroxy group of the alkanolamine is 0.3: 1.0 or more in the hydroxy group of the fatty acid or the lower alkyl ester of the fatty acid: alkanolamine. Further, the ratio is preferably 0.5: 1.0 or more, 1.2: 1.0 or less, and more preferably 1.0: 1.0 or less.

  Examples of the alkylating agent include dialkyl sulfate (the alkyl group has 1 to 3 carbon atoms) and halogenated alkyl (the alkyl group has 1 to 3 carbon atoms). Examples of the acid agent include an inorganic acid and an organic acid. Inorganic acids include hydrochloric acid and sulfuric acid. Examples of the organic acid include carboxylate salts having 2 to 6 carbon atoms, such as lactic acid, glycolic acid, and citric acid. Examples of other organic acids include alkyl sulfuric acids having 1 to 3 carbon atoms.

  The quaternization reaction using an alkylating agent can be performed even in the presence of a solvent (for example, ethanol), but from the viewpoint of suppressing generation of impurities, it is more preferable to perform synthesis without a solvent. Further, the neutralization reaction using an acid agent can be performed in the presence of water or a solvent (eg, ethanol).

<Textile products>
Fibers constituting the fiber product targeted in the present invention may be either hydrophobic fibers or hydrophilic fibers. Examples of the hydrophobic fibers include protein fibers (milk protein casein fibers, promixes, etc.), polyamide fibers (nylons, etc.), polyester fibers (polyesters, etc.), polyacrylonitrile fibers (acrylic, etc.), and polyvinyl alcohol fibers. Fiber (vinylon, etc.), polyvinyl chloride fiber (polyvinyl chloride, etc.), polyvinylidene chloride fiber (vinylidene, etc.), polyolefin fiber (polyethylene, polypropylene, etc.), polyurethane fiber (polyurethane, etc.), polyvinyl chloride / Polyvinyl alcohol copolymer fiber (such as polychloral), polyalkylene paraoxybenzoate fiber (such as benzoate), polyfluoroethylene fiber (such as polytetrafluoroethylene), glass fiber, carbon fiber, and aluminum Fibers, silicone carbide fibers, rock fibers (rock fur Iba), slag fibers (slug fiber), metal fiber (gold, silver thread, steel fibers) and the like. Examples of hydrophilic fibers include seed hair fibers (cotton, noodles, kapok, etc.), bast fibers (hemp, flax, ramie, hemp, jute, etc.), vein fibers (manila hemp, sisal hemp, etc.), palm fibers, Igusa, straw, animal hair fiber (wool, mohair, cashmere, camel, alpaca, bikuna, angora, etc.), silk fiber (cotton silk, wild silk), feathers, cellulosic fiber (rayon, polynosic, cupra, acetate, etc.) Etc. are exemplified.

  The component (A) of the present invention suppresses a decrease in the effect of the textile product finish imparting texture to the textile product by the component (A) of the present invention, as compared with the anionic surfactant conventionally known as a cleaning component. The fibers preferably include cotton fibers from the viewpoint of more easily realizing the effect that can be realized.

In the present invention, the term "textile product" refers to a woven fabric, a knitted fabric, a nonwoven fabric or the like using the hydrophobic fiber or the hydrophilic fiber, and an undershirt, a T-shirt, a Y-shirt, a blouse, a slacks, and a hat obtained by using the fabric. , Handkerchiefs, towels, knits, socks, underwear, tights and other products.
The component (A) of the present invention suppresses a decrease in the effect of the textile product finish imparting texture to the textile product by the component (A) of the present invention, as compared with the anionic surfactant conventionally known as a cleaning component. The fiber product is preferably a fiber product containing cotton fiber, from the viewpoint of more easily realizing the effect that can be realized. The content of the cotton fiber in the fiber product is preferably 5% by mass or more, more preferably 10% by mass or more, still more preferably 15% by mass or more, and still more preferably 20% by mass or more, from the viewpoint of further improving the softness of the fiber. %, More preferably 100% by mass.

<Method of the Present Invention>
The method for washing textiles according to the present invention is a method for washing textiles comprising the following steps 1 and 2.
Step 1: washing a textile product by contacting a washing liquid obtained by mixing water and (A) an internal olefin sulfonate having 14 to 16 carbon atoms with a textile product, and washing the textile product. A step of treating the textile by contacting the treatment liquid obtained by mixing the finishing composition with the textile which has been washed in the step 1; and a method of treating the textile according to the present invention comprises the following steps 1 and 2 2 is a method for treating textile products.
Step 1: washing a textile product by contacting a washing liquid obtained by mixing water and (A) an internal olefin sulfonate having 14 to 16 carbon atoms with a textile product, and washing the textile product. A step of treating the textile by contacting the treatment liquid obtained by mixing the finishing composition with the textile which has been washed in the step 1. Further, the method of suppressing a decrease in the texture of the present invention is as follows: When treating a textile product by the process comprising the steps of: (A) using an internal olefin sulfonate having 14 to 16 carbon atoms as the anionic surfactant in the process 1, the texture of the textile product is reduced. It is a method of suppressing.
Step 1: A washing liquid obtained by mixing water and an anionic surfactant is washed by bringing a textile into contact with the textile. Step 2: A washing liquid obtained by mixing water with a finishing composition for textile. A step of treating the fiber product by bringing the treatment liquid into contact with the fiber product washed in the step 1; a fiber originally contained in the textile product finish composition used in the step 2 by the textile product texture imparting method of the present invention; A decrease in the effect of giving the texture to the product can be suppressed. The texture in the present specification means, for example, a feeling when a textile product is touched with a hand as described later.

  Hereinafter, Step 1, Step 2, an arbitrary step, and the like will be described. Unless otherwise specified, the following description is applicable to these three methods.

<Step 1>
Step 1 is a step of washing the textile by bringing the textile into contact with water and an anionic surfactant, wherein the anionic surfactant is the following component (A).
Component (A): Internal olefin sulfonate having 14 to 16 carbon atoms

The component (A) and the textile used in the step 1 are the same as the component (A) and the textile, respectively.
In step 1, water and an anionic surfactant containing at least the component (A) are mixed to obtain a cleaning liquid. In addition, the water used in the step 1 may be hereinafter referred to as water 1.

As the water 1, ion-exchanged water may be used, or water containing a hardness component may be used. When using water containing a hardness component, the water hardness is, for example, 0.5 ° dH or more, more preferably 1 ° dH or more, further preferably 2 ° dH or more, still more preferably 3 ° dH or more, and preferably Is not more than 20 ° dH, more preferably not more than 10 ° dH, further preferably not more than 8 ° dH, and still more preferably not more than 6 ° dH.
Here, the German hardness (° dH) in the present specification refers to the concentration of calcium and magnesium in water as 1 mg / L (ppm) in terms of CaCO ₃ = about 0.056 ° dH (1 ° dH = 17. 8 ppm).
The calcium and magnesium concentrations for this German hardness are determined by chelate titration using ethylenediaminetetraacetic acid disodium salt. The specific method for measuring the German hardness of water in the present specification is shown below.

<Method of measuring German hardness of water>
〔reagent〕
-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 Inc.)
Ammonia buffer for hardness measurement (solution in which 67.5 g of ammonium chloride is dissolved in 570 ml of 28% w / v ammonia water, and the total amount is made up to 1000 ml with ion-exchanged water)
[Measurement of hardness]
(1) Collect 20 ml of water as a sample into a conical beaker with a whole pipette.
(2) Add 2 ml of an ammonia buffer for hardness measurement.
(3) Add 0.5 ml of Universal BT indicator. Confirm that the solution after addition is reddish purple.
(4) While thoroughly shaking the conical beaker, a 0.01 mol / l EDTA · 2Na solution is dropped from the burette, and the time when the water serving as the sample turns blue turns to the end point of the titration.
(5) The total hardness is determined by the following formula.
Hardness (° dH) = T × 0.01 × F × 56.0774 × 100 / A
T: titration (mL) of 0.01 mol / l EDTA · 2Na solution
A: Sample volume (20 mL, volume of water used as a sample)
F: Factor of 0.01 mol / l EDTA · 2Na solution

In the cleaning liquid used in the step 1, the content of the component (A) in the cleaning liquid, or the content of the component (A) in the total mass of the water 1 and the component (A) can more effectively clean dirt attached to the textile. From the viewpoint, it is preferably 10 mg / kg or more, more preferably 30 mg / kg or more, still more preferably 70 mg / kg or more, and still more preferably 100 mg / kg or more, and the texture of the textile product by the textile product finish composition. From the viewpoint of further improving the imparting effect, the amount is preferably 5,000 mg / kg or less, more preferably 3,000 mg / kg or less, further preferably 2,000 mg / kg or less, and still more preferably 1,000 mg / kg or less.
The content of the component (A) contained in the cleaning liquid is based on a value calculated on the assumption that the counter ion is a sodium ion.

  In step 1, water 1 and the component (A) form a mixture. This mixture is the washing liquid. The temperature of the cleaning liquid is preferably 0 ° C or higher, more preferably 3 ° C or higher, still more preferably 5 ° C or higher, and preferably 40 ° C or lower, from the viewpoint of further improving the cleaning performance of the dirt attached to the textile. Preferably it is 35 ° C. or lower.

The pH of the cleaning solution at 25 ° C. is preferably 4 or more, more preferably 5 or more, and imparts a texture to the textile using the textile finishing agent composition, from the viewpoint of improving the washability of dirt attached to the fibers. From the viewpoint of improving the action, it is preferably 10.5 or less, more preferably 10 or less, still more preferably 9 or less, and still more preferably 8.5 or less. The pH in the present invention is determined by the following [1] pH measuring method.
<Method of measuring pH>
A composite electrode for pH measurement (glass-sliding sleeve type made by HORIBA) is connected to a pH meter (pH / ion meter F-23 made by HORIBA), and the power is turned on. As the pH electrode internal solution, a saturated aqueous potassium chloride solution (3.33 mol / L) is used. Next, 100 mL of 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) were filled into 100 mL beakers, and 25 Immerse in a thermostat at 30 ° C. for 30 minutes. The electrode for pH measurement is immersed in the standard solution adjusted to a constant temperature for 3 minutes, and the calibration operation is performed in the order of pH 6.86 → pH 9.18 → pH 4.01. The sample to be measured is adjusted to 25 ° C., the electrode of the pH meter is immersed in the sample, and the pH after one minute is measured.

  In step 1, the value of the bath ratio represented by the ratio of the mass (kg) of the textile product to the volume (liter) of water 1 or the cleaning liquid, that is, the volume (liter) of water 1 or the cleaning liquid / the mass (kg) of the textile product ) May be referred to as bath ratio 1. When the bath ratio 1 decreases when a home washing machine is used, the amount of the anionic surfactant carried over to Step 2 described below may increase. Even under the washing conditions in which the bath ratio 1 of the textile product washing method in Step 1 is small, it is possible to suppress a decrease in the effect of the textile product finishing composition imparting texture to the textile in Step 2 described below. The bath ratio of 1 is a viewpoint that the finishing agent composition for a textile product can suppress a decrease in the effect of imparting a texture to the textile product in a process 2 described below while maintaining the detergency of stains attached to the textile product. Therefore, the bath ratio 1 is preferably 2 or more, more preferably 3 or more, still more preferably 4 or more, still more preferably 5 or more, and preferably 45 or less, more preferably 40 or less, and still more preferably 30 or less. It is even more preferably 20 or less.

  According to the present invention, the washing time in step 1 is preferably 1 minute or more, more preferably 1 minute or more, from the viewpoint of facilitating the removal of dirt attached to the textile or the effect of imparting a texture to the textile. Is preferably 2 hours or more, more preferably 3 minutes or more, and preferably 1 hour or less, more preferably 30 minutes or less, still more preferably 20 minutes or less, from the viewpoint of further enhancing the effect of imparting texture to the textile product. More preferably, it is 15 minutes or less.

  In step 1, a rotary washing machine can be used for washing textiles. In the present invention, it is preferable to perform the washing of the textile in step 1 using a rotary washing machine, from the viewpoint that the finishing agent composition for textile can enhance the effect of giving the texture to the textile. Specific examples of the rotary washing machine include a drum washing machine, a pulsator washing machine, and an agitator washing machine. As these rotary washing machines, those commercially available for home use can be used. In recent years, drum-type washing machines have rapidly become popular in that the amount of water used for one washing operation can be further reduced. Drum-type washing machines, in particular, can reduce the amount of water during washing. Washing of the textile product of the present invention is preferable in that the effect of the present invention can be more enjoyed, and washing of the textile product using a drum-type washing machine is preferable.

  Further, in the step 1, the textile can be washed by leaving a washing liquid containing water and an anionic surfactant containing at least the component (A), after contacting the washing with the textile, and then leaving the textile to stand. The term “stationary” refers to a state where the textile product and the cleaning liquid are allowed to come into contact with each other and then left. In addition, before or after the above-mentioned leaving, and also in the middle of the leaving, a stirring operation such as shaking or stirring by hand may be appropriately performed.

<Optional components>
The washing liquid used in the step 1 of the present invention can contain components other than the component (A) and water.
In the cleaning solution used in step 1, a surfactant other than the component (A) can be used as the component (C) as long as the effect of the present invention is not impaired. Examples of the component (C) include one or more surfactants selected from anionic surfactants other than the component (A) and nonionic surfactants. Examples of the component (C) include one or more surfactants selected from the following components (c1), (c2), (c3), (c4) and (c5).
(C1) component: alkyl or alkenyl sulfate ester salt (c2) component: polyoxyalkylene alkyl ether sulfate salt or polyoxyalkylene alkenyl ether sulfate salt (c3) component: anionic surfactant having a sulfonate group (however, (Excluding component (A))
Component (c4): Fatty acid or salt thereof Component (c5): Nonionic surfactant having a polyoxyalkylene group

  More specifically, as the component (c1), at least one selected from an alkyl sulfate having 10 to 18 carbon atoms in the alkyl group and an alkenyl sulfate having 10 to 18 carbon atoms in the alkenyl group. Anionic surfactants. From the viewpoint of improving the detergency, the component (c1) is preferably one or more anionic surfactants selected from alkyl sulfates having 12 to 14 carbon atoms in the alkyl group, and having 12 to 14 carbon atoms in the alkyl group. One or more anionic surfactants selected from the following sodium alkyl sulfates are more preferred.

  As the component (c2), more specifically, a polyoxyalkylene alkyl sulfate salt in which the alkyl group has 10 to 18 carbon atoms and the average addition mole number of the alkylene oxide is 1 to 3 and the carbon number of the alkenyl group And at least 10 and no more than 18, and at least one anionic surfactant selected from polyoxyalkylene alkenyl ether sulfates having an average addition mole number of alkylene oxide of 1 or more and 3 or less. From the viewpoint of improving the detergency, the component (c2) is preferably a polyoxyethylene alkyl sulfate having an average addition mole number of ethylene oxide of 1 or more and 2.2 or less, wherein the alkyl group has 12 to 14 carbon atoms and Polyoxyethylene alkyl sulfates having an average addition mole number of ethylene oxide of 1 or more and 2.2 or less are more preferred, and their sodium salts are still more preferred.

The term “anionic surfactant having a sulfonate group as the component (c3)” refers to an anionic surfactant having a sulfonate as a hydrophilic group (however, excluding the component (A)).
As the component (c3), more specifically, an alkyl benzene sulfonate having an alkyl group having 10 to 18 carbon atoms, an alkenyl benzene sulfonate having an alkenyl group having 10 to 18 carbon atoms, and a carbon number of the alkyl group Is an alkane sulfonate having 10 to 18 or less, an α-olefin sulfonate having 10 to 18 carbon atoms in an α-olefin portion, an α-sulfofatty acid salt having 10 to 18 carbon atoms in a fatty acid portion, and a fatty acid portion. And at least one anionic surfactant selected from α-sulfofatty acid lower alkyl ester salts having 10 to 18 carbon atoms in the ester moiety and 1 to 5 carbon atoms in the ester portion. From the viewpoint of improving the detergency, the component (c3) is preferably an alkylbenzene sulfonate having an alkyl group having 11 to 14 carbon atoms, and more preferably sodium alkylbenzene sulfonate having an alkyl group having 11 to 14 carbon atoms.

  Examples of the fatty acid or salt thereof as the component (c4) include a fatty acid having 10 to 20 carbon atoms or a salt thereof. From the viewpoint of further enhancing the softening effect of the fiber by the component (A), the carbon number of the component (c4) is 10 or more, preferably 12 or more, more preferably 14 or more, and 20 or less, preferably 18 or less. .

As the component (c5), for example, a nonionic surfactant represented by the following general formula (c5) is suitable.
R ^1c (CO) _m —O— (AO) _n —R ^2c (c5)
[Wherein, R ^1c is an aliphatic hydrocarbon group having 9 to 16 carbon atoms, R ^2c is a hydrogen atom or a methyl group, CO is a carbonyl group, m is a number of 0 or 1, The AO group is at least one group selected from an ethyleneoxy group and a propyleneoxy group, and n is an average number of added moles, and is a number of 3 or more and 100 or less. ]
In the general formula (c5), R ^1c is an aliphatic hydrocarbon group having 9 to 16 carbon atoms. The carbon number of R1 is 9 or more, preferably 10 or more, more preferably 11 or more, and 16 or less, preferably 15 or less, more preferably 14 or less in terms of making it easier to remove stains attached to the fibers. . As the aliphatic hydrocarbon group for R ^1c , a group selected from an alkyl group and an alkenyl group is preferable.
In the general formula (c5), the AO group is one or more groups selected from an ethyleneoxy group and a propyleneoxy group. When it contains an ethyleneoxy group and a propyleneoxy group, the ethyleneoxy group and the propyleneoxy group may be a block type bond or a random type bond.
In the general formula (c5), n is an average number of added moles, and is a number of 3 or more and 100 or less. n is 3 or more, preferably 6 or more, more preferably 6.5 or more, still more preferably 7 or more, still more preferably 8 or more, and 100 or less in terms of facilitating the removal of dirt attached to the fiber. It is preferably 60 or less, more preferably 50 or less, still more preferably 40 or less, even more preferably 35 or less, and still more preferably 30 or less.

  Examples of the salt of the anionic surfactant as the component (c1) to the component (c4) include an alkali metal salt and an alkanolamine salt having 2 to 6 carbon atoms.

  In the washing liquid used in step 1, the proportion of the component (A) in all anionic surfactants is preferably 50% by mass or more, and more preferably 100% by mass or more.

<Step 2>
Step 2 is a step of treating the textile by contacting the treatment liquid obtained by mixing the water and the finishing agent composition for textile with the textile washed in the step 1. By performing step 2, a texture can be imparted to the fiber product. Here, the texture is not limited, but refers to a feeling such as softness, plumpness, elasticity, smoothness, flexibility, tension, and sliminess. To give a texture to a textile product, for example, taking the washing method of the present invention as an example, a textile product obtained by drying the textile product obtained in step 2 and a textile product obtained by drying the textile product obtained in step 1 Means that the texture obtained by drying the fiber product obtained in step 2 has the above-mentioned texture.

  In step 2, water and the finishing agent composition for textiles are mixed to obtain a treatment liquid. The water used in step 2 may be hereinafter referred to as water 2. The water 2 may be the same as the water 1 used in the step 1, or may be different. Further, together with the fiber product obtained in the step 1, the water 1 may be carried over and included in the water 2 in the step 2.

  The finishing composition for textiles used in the step 2 means the finishing composition for textiles described above.

In step 2, the water 2 and the textile product finish composition form a mixture. This mixture is the processing liquid.
The content of the active ingredient contained in the finishing composition for textiles in the treatment liquid is preferably 5 mg / kg or more, more preferably 10 mg / kg or more, and still more preferably 15 mg, from the viewpoint of imparting a texture to the textiles. / Kg or more, more preferably 20 mg / kg or more, and 1000 mg / kg or less, more preferably 700 mg / kg or less, further preferably 500 mg / kg or less, still more preferably 300 mg / kg or less, and even more preferably 100 mg or less. / Kg or less. The active ingredient contained in the above-mentioned finishing composition for textile products refers to a component which, when a specific component is removed from the finishing composition for textile products, reduces the effect of giving a texture to textile products. Although it is not limited, in the case of a textile product finish composition containing a cationic surfactant, the active ingredient includes the above-mentioned cationic surfactant.

  In step 2, the temperature of the treatment liquid may be, for example, 0 ° C. or higher, more preferably 3 ° C. or higher, still more preferably 5 ° C. or higher, and preferably 40 ° C. or lower, more preferably 35 ° C. or lower. .

  The pH of the treatment liquid at 25 ° C. is preferably 4 or more, more preferably 5 or more, and preferably 10.5 or less, more preferably 10 or less, from the viewpoint of improving the effect of imparting texture to the textile. It is preferably at most 9, more preferably at most 8.5, even more preferably at most 8.0. The pH can be measured according to the above [1] pH measuring method.

  The value of the bath ratio represented by the ratio of the mass (kg) of the textile product to the volume of water 2 or the treatment liquid (liter), that is, the volume (liter) of water or treatment liquid / the mass (kg) of the textile product, , Bath ratio 2 in some cases. In the step 2, it is possible to suppress a decrease in the effect of the textile product finishing agent composition imparting texture to the textile product. The bath ratio 2 is preferably 2 or more, more preferably 3 or more, and still more preferably 4 or more, from the viewpoint that the finishing agent composition for a textile product can suppress a decrease in the effect of giving a texture to the textile product. It is still more preferably 5 or more, and preferably 45 or less, more preferably 40 or less, still more preferably 30 or less, and still more preferably 20 or less. In addition, the mass of the textile at the bath ratio of 2 is the mass of the textile initially used in the step 1, and when the textile after the step 1 is in a wet state, the mass of the textile taken in the textile 1 Does not include the amount of the washing liquid in the above.

  The contact time between the textile and the treatment liquid in step 2 is preferably 10 seconds or more, more preferably 30 seconds or more, and still more preferably 1 minute, from the viewpoint that the effect of imparting a texture to the textile can be further enhanced. The above is more preferably 2 minutes or more, further preferably 3 minutes or more, and 30 minutes or less, further preferably 20 minutes or less, still more preferably 10 minutes or less, and more preferably 5 minutes or less.

  In step 2, a rotary washing machine can be used for treating textile products. In the present invention, the treatment of the textile in step 2 is preferably performed using a rotary washing machine, from the viewpoint that the finishing agent composition for textile can enhance the effect of imparting a texture to the textile. Specific examples of the rotary washing machine include a drum washing machine, a pulsator washing machine, and an agitator washing machine. As these rotary washing machines, those commercially available for home use can be used. In recent years, drum-type washing machines have rapidly become popular in that the amount of water used for one washing operation can be further reduced. Drum-type washing machines can reduce the amount of water particularly in washing. Step 2 is preferably performed using a drum-type washing machine in that the effects of the present invention can be more enjoyed.

  In the step 2, the treatment liquid obtained from the water 2 and the finishing agent composition for textile products is allowed to stand still after being brought into contact with the textile products, so that the textile products can be given a texture. The term “stationary” refers to a state where the textile product, the water 2 and the finishing composition for textile product are brought into contact with each other and then left standing. In addition, before or after the above-mentioned leaving, and also in the middle of the leaving, a stirring operation such as shaking or stirring by hand may be appropriately performed.

<Optional process>
(Dehydration step)
Between Step 1 and Step 2, for example, before performing Step 2 on the fiber product obtained in Step 1, a dehydration step of dehydrating the fiber product washed in Step 1 can be performed. Further, after the step 2, a dehydration step of dehydrating the fiber product treated in the step 2 can be performed. Hereinafter, the dehydration step performed between step 1 and step 2 may be referred to as dehydration step 1. In addition, a dehydration step performed after the step 2 may be referred to as a dehydration step 2. A plurality of dehydration steps 1 and 2 can be performed, respectively.

  Dehydration step 1 refers to a step of reducing the amount of cleaning liquid present with the textile. By performing the dehydration step 1, the amount of the anionic surfactant carried over to the step 2 together with the fiber product can be reduced. It is known that an anionic surfactant which does not correspond to the component (A) reduces the effect of the active ingredient contained in the finishing composition for textile products imparting a texture to textile products. Performing the dehydration step 1 is preferable because the effect of imparting a texture to the textile in step 2 is further improved. Assuming that the weight of the fiber product before being subjected to the step 1 is 100 parts by mass, the fiber product taken out of the cleaning liquid in the step 1 may include the cleaning liquid in an amount of 90 parts by mass to 200 parts by mass. The dehydration step 1 means a step of reducing the mass of the cleaning liquid contained in the fiber product to 10 parts by mass or more and 70 parts by mass or less, when the mass of the fiber product before being subjected to the step 1 is 100 parts by mass. As an example of the dehydration step 1, for example, there is a method in which the amount of the cleaning liquid existing together with the textile is reduced by applying gravity, centrifugal force, or pressure from the textile to a state in which the textile and the cleaning liquid coexist.

  The dehydration step 2 is a step for reducing the amount of the treatment liquid present together with the fiber product obtained in the step 2. By performing the dehydration step 2, the drying time described later is shortened, and the textile can be in a state suitable for wearing. When the mass of the fiber product before being subjected to the step 1 is 100 parts by mass, it means a process of reducing the mass of the treatment liquid contained in the fiber product to 10 parts by mass or more and 70 parts by mass or less. As an example of the dehydration step 2, for example, a method of reducing the amount of the processing liquid existing with the fiber product by applying gravity, centrifugal force, or pressure from the fiber product from a state in which the fiber product and the processing liquid coexist. .

[Rinse process]
A rinsing step may be performed between step 1 and step 2. In the present invention, the rinsing step refers to a step of reducing the amount of an anionic surfactant present in the fiber product obtained in Step 1. The rinsing step includes, for example, a method of bringing the textile product washed in step 1 into contact with fresh water. In the rinsing step, the value of the bath ratio represented by the ratio of the mass (kg) of the textile product to the volume of water (liter) before being subjected to the step 1, that is, the volume of water (liter) / the mass of textile product (kg) Hereafter may be referred to as a bath ratio of 3. Bath ratio 3 is preferably 2 or more, more preferably 3 or more, and still more preferably, from the viewpoint that the finishing agent composition for textile products in step 2 can suppress a decrease in the effect of imparting a texture to textile products. It is 4 or more, still more preferably 5 or more, and preferably 45 or less, more preferably 40 or less, still more preferably 30 or less, and still more preferably 20 or less. The water used in the rinsing step may be the same as or different from the water 1 or water 2. A plurality of rinsing steps can be performed.

(Drying process)
Between step 1 and step 2 or after step 2, a drying step of drying the textile can be performed.
The drying step is a step of reducing the amount of the cleaning liquid existing together with the fiber product obtained in the step 1 or the amount of the processing liquid existing together with the fiber product obtained in the step 2. Specifically, when the mass of the fiber product before being subjected to the step 1 is 100 parts by mass, the fiber product after drying is in a state of 90 parts by mass or more and 110 parts by mass or less. In addition, in the above-mentioned step 1 and step 2 or any step, fibers may fall off from the fiber product, and apparently, the weight of the fiber product after the drying step is smaller than the mass of the fiber product before being subjected to the step 1. Since the mass may decrease, the mass of the dried fiber product is set in the above range. Drying may be either natural drying or heat drying. A plurality of drying steps can be performed, respectively.

[Synthesis of Component (A)]
(1) Synthesis of internal olefins A to C (Production Examples A to C)
(A) The internal olefins A to C as the raw materials of the component were synthesized as follows.
In a flask with a stirrer, 7000 g (28.9 mol) of 1-hexadecanol (product name: Calcol 6098, manufactured by Kao Corporation), 700 g of γ-alumina (STREM Chemicals, Inc.) as a solid acid catalyst (based on the starting alcohol) The reaction was carried out at 280 ° C. with stirring while flowing nitrogen (7000 mL / min.) Through the system while changing the reaction time for each of Production Examples A to C. The obtained crude internal olefin was transferred to a distillation flask and distilled at 136 to 160 ° C./4.0 mmHg to obtain internal olefins A to C having an olefin purity of 100% and 16 carbon atoms. Table 1 shows the double bond distribution of the obtained internal olefin.

The distribution of double bonds in the internal olefin was measured by gas chromatography (hereinafter abbreviated as GC). Specifically, after the internal olefin was reacted with dimethyl disulfide to obtain a dithiolated derivative, each component was separated by GC. As a result, the double bond distribution of the internal olefin was determined from each peak area. In the case of an olefin having 16 carbon atoms, an internal olefin having a double bond at the 7-position and an internal olefin having a double bond at the 8-position are structurally indistinguishable, but are distinguished when sulfonated. For convenience, the value obtained by dividing the amount of the internal olefin having a double bond at the 7-position by 2 is shown in the respective columns of the 7-position and the 8-position.
In addition, the apparatus and analysis conditions used for the measurement are as follows. GC apparatus “HP6890” (manufactured by HEWLETT PACKARD), column “Ultra-Alloy-1HT capillary column” (30 m × 250 μm × 0.15 μm, manufactured by Frontier Laboratories), detector (flame ion detector (FID)) Injection temperature 300 ° C, detector temperature 350 ° C, He flow rate 4.6mL / min

(2) Production of internal olefin sulfonate having 16 carbon atoms The internal olefins A to C obtained in Production Examples A to C were converted into sulfur trioxide gas using a thin film type sulfonation reactor having a jacket on the outside, The sulfonation reaction was performed by passing cooling water at 20 ° C. through the outer jacket of the reactor. The molar ratio of SO ₃ / internal olefin during the sulfonation reaction was set to 1.09. The obtained sulfonated product was added to an aqueous alkali solution prepared with 1.5 times the molar amount of sodium hydroxide of the theoretical acid value, and neutralized at 30 ° C. for 1 hour with stirring. The neutralized product was hydrolyzed by heating at 160 ° C. for 1 hour in an autoclave to obtain a crude product of sodium olefin sulfonate having 16 carbon atoms. 300 g of the crude product was transferred to a separatory funnel, 300 mL of ethanol was added, and then 300 mL of petroleum ether was added each time to extract and remove oil-soluble impurities. At this time, the inorganic compound (main component: sodium sulfate) precipitated at the oil-water interface due to the addition of ethanol was also separated and removed from the aqueous phase by the oil-water separation operation. This extraction and removal operation was performed three times. By evaporating the aqueous phase to dryness, (a-1), (a-2) and (a-3), which are sodium olefin sulfonates having 16 carbon atoms, were obtained. The mass ratios of these olefin compounds (sodium olefin sulfonate) / hydroxy compounds (sodium hydroxyalkane sulfonate) are as follows.
The mass ratio of olefin / hydroxy was measured by HPLC-MS. Specifically, the hydroxy form and the olefin form were separated by HPLC, and each was identified by applying MS. As a result, each ratio was determined from the HPLC-MS peak area.
The equipment and conditions used for the measurement are as follows. HPLC apparatus “Agilent Technology 1100” (manufactured by Agilent Technologies), column “L-column ODS” (4.6 × 150 mm, manufactured by Japan Chemicals Evaluation and Research Organization), sample preparation (1000-fold dilution with methanol), eluent A (water with 10 mM ammonium acetate), eluent B (methanol with 10 mM ammonium acetate), gradient (0 min (A / B = 30/70%) → 10 min (30/70%) → 55 min (0 / 100%) → 65 minutes (0/100%) → 66 minutes (30/70%) → 75 minutes (30/70%), MS apparatus “Agilent Technology 1100MSSL (G1946D)” (manufactured by Agilent Technologies), MS detection (Anion detection m / z 60-1600, UV 240 nm)

[Synthesis of component (B)]
(1) Component (b-1): Synthesis of Cationic Surfactant 195 g of mixed fatty acid (mass ratio of palmitic acid / stearic acid / oleic acid / linoleic acid is 30/30/35/5, average molecular weight of 275) (195 g). 71 mol) and 54.4 g (0.37 mol) of triethanolamine were reacted at 180 to 185 ° C. (under normal pressure) for 3 hours, then reduced to 200 mmHg and aged for 3 hours. Thereafter, the pressure was returned to normal pressure with nitrogen and cooled to 100 ° C. to obtain 392 g of a dehydrated condensate. The obtained condensate had an acid value (based on JIS K0070) of 0.7 mg KOH / g and a total amine value (based on JIS K2501) of 196 mg KOH / g. Next, the temperature of 392 g of the dehydrated condensate is adjusted to 70 to 75 ° C., and based on the amine value of the dehydrated condensate, dimethyl sulfate equivalent to 0.98 equivalent to the amine equivalent of the dehydrated condensate is obtained. It was added dropwise over 2.5 hours. After completion of the dropwise addition, the mixture was aged at 50 to 55 ° C for 3 hours to obtain a reaction product containing the target compound (b-1) at 75% by mass. In the examples, the quaternary ammonium salt in the reaction product was used as the component (b-1).

<Ingredients>
[(A) component]
(A-1): sodium salt of internal olefin sulfonic acid obtained from internal olefin A, the mass ratio of olefin (sodium olefin sulfonate) / hydroxy (sodium hydroxyalkane sulfonate) in sodium internal olefin sulfonate is 14 / 86.
(A-2): sodium salt of internal olefin sulfonic acid obtained from internal olefin B, mass ratio of olefin (sodium olefin sulfonate) / hydroxy (sodium hydroxyalkane sulfonate) in sodium internal olefin sulfonate is 15 / 85.
(A-3): internal olefin sulfonate sodium salt obtained from internal olefin C, mass ratio of olefin (sodium olefin sulfonate) / hydroxy (sodium hydroxyalkane sulfonate) in internal sodium olefin sulfonate is 15 / 85

[(A ') component] (comparative component of A component)
(A'-1): sodium polyoxyethylene lauryl ether sulfate (average number of moles of EO added to oxyethylene group: 2 moles, Emal 270J manufactured by Kao Corporation)
(A'-2): Sodium alkylbenzene sulfonate (Neoperex G-25 manufactured by Kao Corporation)

[(B) component]
Component (b-1): a quaternary ammonium salt obtained in the above "(1) Component (b-1): Synthesis of Cationic Surfactant"

〔water〕
Water: City water (3.5 ° dH, calculated by the method for measuring water hardness described above, 20 ° C.)

<Flexibility evaluation method>
(1) Preparation of fiber product for evaluation A cotton towel (100% cotton) was used as a fiber product.
(1-1) Pretreatment of cotton towel for evaluation In advance, a 1.7 kg cotton towel (TW220, 100% cotton, manufactured by Takei Towel Co., Ltd.) is supplied to a standard course of a fully automatic washing machine (Na-F702P manufactured by National). 2 times cumulative washing (4.7 g of Emulgen 108 (made by Kao Corporation) at the time of washing, 47 L of water, 9 minutes of washing, 2 times of rinsing, 3 minutes of dehydration), and 3 times of cumulative washing with water only (47 L of water, washing (9 minutes, 2 rinses, 3 minutes of dehydration), and dried under an environment of 23 ° C. and 45% RH for 24 hours.

(1-2) Preparation of Cotton Towel for Evaluation 0.5 mL of a model sebum artificially contaminated liquid having the following composition was applied to a plain woven portion of the cotton towel obtained in (1-1) above in a circular shape having a diameter of 2 cm. It was dried in an environment of 23 ° C. and 45% RH for 24 hours.
* Composition of model sebum artificial contaminated liquid: 0.4% by mass of lauric acid, 3.1% by mass of myristic acid, 2.3% by mass of pentadecanoic acid, 6.2% by mass of palmitic acid, 0.4% by mass of heptadecanoic acid, stearin 1.6% by weight of acid, 7.8% by weight of oleic acid, 13.0% by weight of triolein, 2.2% by weight of n-hexadecyl palmitate, 6.5% by weight of squalene, 1.9% by weight of egg white lecithin liquid crystal , 8.1% by mass of Kanuma Red Clay, 0.01% by mass of carbon black, remaining water (100% by mass in total)

[Step 1]
4.0 L of city water was injected into a National-made electric bucket-type washing machine (model number “N-BK2”). Then, a 5% by mass aqueous solution of the component (A) or the component (A ') shown in Table 2 is added, and the concentration of the component (A) or the component (A') in the cleaning solution is adjusted to the concentration shown in Table 2. After the cleaning liquid was prepared, the mixture was stirred for 1 minute to prepare a cleaning liquid that was a mixture of city water and the component (A) or the component (A ′). Table 2 shows the concentration of the component (A) or the component (A ′) in the cleaning solution. Table 2 shows the results of the measurement of the pH of the washing solution according to the above-described pH measurement method. Table 2 shows the temperature of the cleaning solution. Two cotton towels (150 g / 2) for evaluation obtained in the above (2-2) were put into the washing machine, and stirred for 10 minutes to wash.

[Dehydration step 1]
Two cotton towels obtained in the above step 1 were dehydrated for 1 minute using a two-layer washing machine (model number “PS-H35L”) manufactured by Hitachi. As a result of measuring the mass of the cotton towel after dehydration, in any of the examples or the comparative examples, the mass of the mixture after dehydration when the mass of the cotton towel before being subjected to the step 1 was 100 parts by mass was 70 parts by mass. Met.

[Rinse step 1]
4.0 L of city water was injected into a National-made electric bucket-type washing machine (model number “N-BK2”). Next, two cotton towels obtained in the dehydration step, which is an optional step described above, are charged, and then 6.0 L of the city water is poured into the bucket washing machine, followed by a two-layer washing machine manufactured by Hitachi. After dehydration, a cotton towel was charged and a rinsing process was performed for 3 minutes. After that, an optional dehydration treatment was performed for one minute using the two-layer washing machine described above.

[Dehydration step 2]
Two cotton towels obtained in the above rinsing step were dehydrated for 1 minute using a two-layer washing machine made by Hitachi (model number "PS-H35L"). As a result of measuring the mass of the cotton towel after dehydration, in any of the examples and comparative examples, the mass of the mixture after dehydration when the mass of the cotton towel before being subjected to the step 1 was 100 parts by mass was 69 parts by mass. Met.

[Drying step 1]
The cotton towel obtained in the above-mentioned dehydration step 2 was hung on a clothesline and allowed to dry at 20 ° C. and 43% RH for 12 hours.

[Step 2]
The mass of the cotton towel obtained in the drying step 1 was measured (149 g / 2 sheets). 4.0 L of city water was injected into a National-made electric bucket-type washing machine (model number “N-BK2”). Next, a 5% by mass aqueous dispersion of the component (B) shown in Table 2 was charged and stirred for 1 minute, and (B-1) was added so that the concentration of the component (b-1) in the treatment liquid became the concentration shown in Table 2. ) A treatment liquid which was a mixture of the component and water was obtained. The temperature of the treatment liquid was 20 ° C., and the pH was 7.3. Two cotton towels (149 g / 2) obtained in the drying step 1 were put into the washing machine and stirred for 3 minutes to bring the cotton towel into contact with the treatment liquid.

[Dehydration step 3]
Two cotton towels obtained in the above step 2 were dehydrated for 1 minute using a two-layer washing machine made by Hitachi (model number "PS-H35L"). As a result of measuring the mass of the cotton towel after dehydration, in any of the examples or comparative examples, the mass of the mixture after dehydration when the mass of the cotton towel before being subjected to the step 2 was 100 parts by mass was 69 parts by mass. Met.

[Drying step 2]
The cotton towel obtained in the above-mentioned dehydration step 2 was hung on a clothesline and allowed to dry at 20 ° C. and 43% RH for 12 hours.

The above-mentioned steps 1, dehydration step 1, rinsing step 1, dehydration step 2, drying step 1, step 2, dehydration step 3, and drying step 2 are defined as one cycle. Was evaluated for flexibility.
In each step, the mass of the cotton towel is a value measured in an environment of 20 ° C. and 43% RH.

(3) Evaluation of Flexibility In step 1, a cotton towel obtained using sodium alkylbenzenesulfonate which is a component (a'-1) which is a comparative compound of the component (A) was used as a reference 1, and in step 1, (A) ) A method for evaluating a modified method of Nakaya, which is a paired comparison method of Scheffe, using a total of 5 samples including 3 samples of a cotton towel for evaluation, using a cotton towel that has been subjected to a washing process using no component as a reference 2 (reference example). Was evaluated for flexibility. In the mean value of each of the five samples, which is calculated by the Scheffe pairwise comparison method of Nakaya's modification, the average value of the reference 1 is 0, and the average value of the reference 2 is 100. Were standardized, and the evaluation point of each sample was obtained. Table 2 shows the results.
A sample having a value higher than the criterion 1 by 5 or more is regarded as acceptable, and a higher value is more preferable. Further, it is preferable that the value is closer to the reference 2.

The softness of the cotton towels of Examples 1 to 3, which were washed using the component (A) of the present invention and then contacted with the textile finishing composition, and washed, is known as a general cleaning ingredient. Comparative Example 2 (Criterion 1) Washed with an alkyl benzene sulfonate and then contacted with a finishing composition for textiles and washed with a cotton towel softer than a cotton towel and washed without using an anionic surfactant In Example 2 (reference example), the degree of decrease in softness of the cotton towel was small.
In addition, as a result of visually observing the dirt adhering to the plain woven portion of the cotton towels washed in Examples 1 to 3 and Comparative Example 1 or Comparative Example 2 (Reference 1) in Table 1, the results were from the Reference Example (Reference 2). Was also falling.

Claims (5)

When treating a textile product by a process including the following process 1 and process 2, (A) a texture of a textile product using (A) an internal olefin sulfonate having 14 to 16 carbon atoms as an anionic surfactant. To reduce the decrease in
Step 1: a step of washing a textile by contacting the textile with a washing liquid obtained by mixing water and an anionic surfactant.
Step 2: a step of contacting the treatment liquid obtained by mixing water and the finishing agent composition for textile products with the textile product washed in step 1 to treat the textile products The component (A) according to claim 1, wherein the component (A) is an internal olefin sulfonate obtained from an internal olefin containing an internal olefin having 14 to 16 carbon atoms having a double bond at the 5-position or higher. , A method of suppressing a decrease in texture of textile products. (A) An internal olefin sulfonate obtained by using, as a raw material, an internal olefin containing 10 mass% to 60 mass% of an internal olefin having 14 to 16 carbon atoms having a double bond at the 5-position or higher, wherein the component (A) is a component. The method according to claim 2, wherein the texture of the textile product is suppressed from being reduced. The textile composition finishing agent composition contains a cationic surfactant having a hydrocarbon group having 16 to 24 carbon atoms , and suppresses a decrease in texture of the textile product according to any one of claims 1 to 3. how to. The method according to any one of claims 1 to 4, wherein the textile product is a textile product containing cotton .