JP2020105420A - Detergent composition for fiber product - Google Patents

Abstract

To provide a detergent composition for fiber products, which contains a polyoxyalkylene alkyl ether sulfate and an aliphatic acid having 10 to 20 carbons or its salt and has improved detergency.SOLUTION: A detergent composition for fiber products containing a (a) component and a (b) component and a (c) component shown below, in which (c)component/[(a) component + (b) component] that is a mass ratio of a content of the (c) component to a total content of the (a) component and the (b) component is 0.01 or larger and less than 1.0. The (a) component: an internal olefin sulfonate having 16 to 24 carbon atoms, (b) component: polyoxyalkylene alkyl ether sulfate, (c) component: an aliphatic acid having 10 to 20 carbons or its salt.SELECTED DRAWING: None

Description

The present invention relates to a detergent composition for textile products.

Conventionally, anionic surfactants such as alkylbenzene sulfonates, anionic surfactants containing an oxyalkylene group having 2 to 3 carbon atoms, and olefin sulfonates have been widely used as household and industrial cleaning components. .. Further, it is known to use various surfactants together in such applications. Fatty acids are widely used as antifoaming agents in detergent compositions for textile products.

Patent Document 1 describes a detergent composition containing a specific anionic surfactant containing an alkyleneoxy group and a specific compound containing an alkyleneoxy group in a specific ratio and containing a fatty acid as an antifoaming agent.
Patent Document 2 discloses a detergent composition containing an internal olefin sulfonate and having excellent detergency against greasy dirt with cold water at 30° C. or lower.
Patent Document 3 discloses a detergent composition having excellent low-temperature stability by combining a specific organic solvent and a fatty acid with respect to an internal olefin sulfonate.
Patent Document 4 discloses a detergent composition having an excellent detergency containing an internal olefin sulfonate containing 25% or more of β-hydroxy form. A specific example describes a detergent composition containing an internal olefin sulfonate and a nonionic surfactant.
Patent Document 5 describes a detergent composition containing an internal olefin sulfonate having a specific carbon number and a specific nonionic surfactant in a specific ratio.

JP, 2017-25208, A Japanese Patent Publication No. 2017-520645 JP, 2017-214576, A European Patent Application Publication No. 377261 US Pat. No. 5,078,916

Even if a polyoxyalkylene alkyl ether sulfate is selected for improving the detergency, it has been found that the detergency is lowered when a fatty acid having 10 to 20 carbon atoms or a salt thereof is further used.

The present invention provides a detergent composition for a textile product, which contains a polyoxyalkylene alkyl ether sulfate and a fatty acid having 10 or more and 20 or less carbon atoms or a salt thereof and has a further improved detergency.

The present invention contains the following component (a), component (b) and component (c), and is a mass ratio of the content of component (c) and the total content of component (a) and component (b). (C) component/[(a) component+(b) component] is 0.01 or more and less than 1.0, and relates to a detergent composition for textile products.
Component (a): Internal olefin sulfonate having 16 to 24 carbon atoms (b) Component: Polyoxyalkylene alkyl ether sulfate (c) Component: Fatty acid having 10 to 20 carbon atoms or salt thereof

ADVANTAGE OF THE INVENTION According to this invention, the detergent composition for textiles which contains the polyoxyalkylene alkyl ether sulfate and the fatty acid of 10 or more and 20 or less carbon atoms, or its salt, and was improved in detergency is provided. In the present invention, it is possible to obtain a detergent composition for a textile product, which can maximize the effect of the combined use of the surfactant without reducing the detergency by using the fatty acid together.

When a cleaning liquid is prepared by mixing a detergent composition for textile products with water containing a hardness component, the fatty acid or its salt binds to the hardness component in water to further improve the hydrophobicity, resulting in a decrease in solubility in the cleaning liquid. However, it is considered that they are precipitated in the cleaning liquid. Conventionally known as a cleaning component, polyoxyalkylene alkyl ether sulfate cannot dissolve the precipitate of fatty acid or its salt precipitated by the hardness component in water, and the fatty acid behaves like dirt and has a cleaning power. It is estimated that it will decrease.
The internal olefin sulfonate having 16 to 24 carbon atoms, which is the component (a) of the present invention, has both a high hydrophobicity and a high water solubility because a hydrophilic group exists inside the hydrocarbon group. thinking. In the present invention, the internal olefin sulfonate having a carbon number of 16 or more and 24 or less wash|cleans a fatty acid or its salt by melt|dissolving the crystal|crystallization formed by the hardness component of a fatty acid and water in the cleaning liquid containing a hardness component and water. It is presumed that it has been modified so as to act as part of an effective surfactant.

<(a) component>
The component (a) of the present invention is an internal olefin sulfonate having 16 or more and 24 or less carbon atoms. In the present invention, the decrease in detergency caused by using the component (c) in combination with the detergent composition for a textile product containing the component (b) is further suppressed by using the component (a) in combination, In addition, the cleaning power can be improved. The carbon number of the component (a) represents the carbon number of the internal olefin to which the sulfonate is covalently bonded. The carbon number of the component (a) is 16 or more from the viewpoint of improving detergency when used in combination with the component (b), and from the same viewpoint, 24 or less, preferably 20 or less, more preferably 18 or less. is there.

The internal olefin sulfonate of the present invention is a sulfone obtained by sulfonation, neutralization and hydrolysis of an internal olefin having 16 to 24 carbon atoms (olefin having a double bond inside the olefin chain) as a raw material. It is an acid salt.
Such internal olefins also include those containing a small amount of so-called alpha olefin (hereinafter also referred to as α-olefin) in which the position of the double bond is at the 1-position of the carbon chain.
Further, when the internal olefin is sulfonated, β-sultone is quantitatively produced, a part of β-sultone is changed to γ-sultone and olefin sulfonic acid, and further, these are hydroxy in the neutralization/hydrolysis step. It is converted to an alkane sulfonate and an olefin sulfonate (for example, J. Am. Oil Chem. Soc. 69, 39 (1992)). Here, the hydroxy group of the resulting 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 thereof, and a part thereof is a hydroxyalkanesulfonate having a hydroxy group at the end of the carbon chain, or an olefin having a double bond at the end of the carbon chain. A small amount of sulfonate may be contained.

Examples of salts of internal olefin sulfonates include alkali metal salts, alkaline earth metal (1/2 atom) salts, ammonium salts or organic ammonium salts. Examples of the alkali metal salt include sodium salt and potassium salt. Examples of the organic ammonium salt include alkanol ammonium salts having 1 to 6 carbon atoms.

<Component (b)>
The component (b) of the present invention is a polyoxyalkylene alkyl ether sulfate. In the polyoxyalkylene alkyl ether sulfate, alkyl means an aliphatic hydrocarbon group, including an alkyl group as a saturated aliphatic hydrocarbon group and an alkenyl group as an unsaturated aliphatic hydrocarbon group, an alkyl group for convenience. Called. The component (b) functions as an anionic surfactant. The component (b) has a function of cleaning dirt attached to the textile product. The component (b) is preferably a sulfate represented by the following general formula (1).
_{RO- (AO) n -SO 3 M} (1)
[In the formula, R is an aliphatic hydrocarbon group having 12 to 16 carbon atoms, the AO group is at least one group selected from alkyleneoxy groups having 2 or 3 carbon atoms, and n is an average. It is the number of added moles and is 0.5 or more and 5 or less, and M is a cation. ]

In general formula (1), the carbon number of R is preferably 12 or more and 14 or less. From the viewpoint of further enhancing the detergency attached to the textile product, R is preferably an aliphatic hydrocarbon group containing an aliphatic hydrocarbon group having 12 or more and 14 or less carbon atoms. Examples of the aliphatic hydrocarbon group include an alkyl group and an alkenyl group.

In the general formula (1), the AO group is one or more groups selected from alkyleneoxy groups having 2 or 3 carbon atoms, and examples thereof include one or more groups selected from ethyleneoxy groups and propyleneoxy groups. When n is 2 or more and 5 or less, the AO group may be a group containing only an ethyleneoxy group or a propyleneoxy group, or may be a group containing an ethyleneoxy group and a propyleneoxy group. In the case of a group containing an ethyleneoxy group and a propyleneoxy group, the ethyleneoxy group and the propyleneoxy group may be a random bond or a block bond. From the viewpoint of further increasing the cleaning rate improvement rate by using the component (b) together, the AO group is preferably a group containing an ethyleneoxy group, and more preferably an ethyleneoxy group.

In the general formula (1), n is the average number of moles of addition of the AO group, and is 0.5 or more and 5. From the viewpoint of being able to further reduce the degree of decrease in detergency that occurs when used in combination with the component (c) described below, n is preferably 0.7 or more, more preferably 1 or more, still more preferably 2 or more. And more preferably 2.5 or more, and from the same viewpoint, preferably 4 or less, more preferably 3 or less.

In the general formula (1), M is a cation that forms a salt. Examples of M include alkali metal ions such as sodium ion and potassium ion, ammonium ion, and alkanol ammonium ion. The alkanol ammonium ion is preferably an alkanol ammonium ion having a total carbon number of 2 or more and 6 or less.

<Component (c)>
The component (c) of the present invention is a fatty acid having 10 to 20 carbon atoms or a salt thereof. The component (c) is used, for example, as a component for controlling foaming during washing and rinsing, and foam breakage during rinsing. From the viewpoint of such foam control, the carbon number of the component (c) is more preferably 12 or more and 18 or less. Further, from the viewpoint of further increasing the cleaning rate improvement rate by using the component (c) together, the carbon number of the component (c) is 10 or more, preferably 12 or more, more preferably 14 or more, and the same viewpoint Therefore, it is 20 or less, preferably 18 or less, more preferably 16 or less.

Examples of the component (c) include decanoic acid, lauric acid, myristic acid, palmitic acid, palmitoleic acid, stearic acid, oleic acid, linoleic acid, linoleic acid and salts thereof. It is also possible to use mixed fatty acids such as coconut composition fatty acids. The fatty acid salt is an inorganic salt selected from sodium salt, potassium salt, magnesium salt, ammonium salt, organic amine salt such as monoethanolamine salt, diethanolamine salt, triethanolamine salt, but preferably sodium salt, potassium salt. Examples thereof include salts and magnesium salts, more preferably sodium salts and potassium salts.

<Composition etc. of detergent composition for textile products>
The content of the component (a) and the content of the component (b) in the detergent composition for textile products are calculated by the mass of the counter ion converted into sodium ion. The content of the component (c) in the detergent composition for textile products is calculated by the mass converted into the acid form.

Component (c)/[(a) component+(b), which is the mass ratio of the content of component (c) and the total content of component (a) and component (b) in the detergent composition for textile products. Component) is 0.01 or more, preferably 0.05 or more, more preferably 0.1 or more, still more preferably 0.15 or more, from the viewpoint of further increasing the cleaning rate improvement rate by the combined use of component (c). It is more preferably 0.2 or more, and from the same viewpoint, less than 1.0, preferably 0.8 or less, more preferably 0.7 or less, still more preferably 0.6 or less, preferably 0.5. Or less, more preferably 0.4 or less.

The component (a) component/(b), which is the mass ratio of the content of the component (a) and the content of the component (b), is preferable from the viewpoint of further increasing the cleaning rate improvement rate by the combined use of the component (c). Is 0.01 or more, more preferably 0.05 or more, even more preferably 0.1 or more, even more preferably 0.2 or more, still more preferably 0.3 or more, and from the same viewpoint, 10 or less, preferably Is 9 or less, more preferably 8 or less, still more preferably 6 or less, even more preferably 4 or less, and even more preferably 3 or less.

In the detergent composition for textile products of the present invention, the total amount of the content of the component (a), the content of the component (b), and the content of the component (c) is a textile product per washing of the textile product. It can be appropriately changed by setting the amount of the cleaning composition for use. For example, the total amount of the content of the component (a), the content of the component (b) and the content of the component (c) is preferably 5% by mass or more, more preferably 7% by mass or more, and It is preferably 10% by mass or more, and preferably 50% by mass or less, more preferably 40% by mass or less, further preferably 30% by mass or less, still more preferably 20% by mass or less. .. It can be appropriately selected within these ranges.

When a large amount of the detergent composition for textile products used per washing of textile products is set, the content of the component (a) and the content of the component (b) in the detergent composition for textile products are The total content of the component (c) can be set low. When the usage amount of the detergent composition for textile products per washing of the textile products is set to be small, the content of the component (a) and the content of the component (b) in the detergent composition for textile products are A large total amount of the components (c) can be set.

The content of the component (c) in the detergent composition for textiles of the present invention is preferably 1% by mass or more, more preferably 2% by mass or more, further preferably 3% by mass or more, from the viewpoint of defoaming performance. , And more preferably 4% by mass or more. Further, it is preferably 15% by mass or less, and more preferably 10% by mass or less, from the viewpoint of detergency of dirt attached to the fibers.

<fiber>
The fibers constituting the textile product washed with the detergent composition for textile products of the present invention may be either hydrophobic fibers or hydrophilic fibers. Examples of the hydrophobic fiber include protein fiber (milk protein casein fiber, promix, etc.), polyamide fiber (nylon, etc.), polyester fiber (polyester, etc.), polyacrylonitrile fiber (acrylic, etc.), polyvinyl alcohol fiber. Fibers (such as vinylon), polyvinyl chloride fibers (such as polyvinyl chloride), polyvinylidene chloride fibers (such as vinylidene), polyolefin fibers (such as polyethylene and polypropylene), polyurethane fibers (such as polyurethane), polyvinyl chloride/ Examples thereof include polyvinyl alcohol copolymer fibers (polycleral, etc.). Examples of hydrophilic fibers include seed hair fibers (cotton, rice noodles, kapok, etc.), bast fibers (hemp, flax, ramie, hemp, jute, etc.), vein fibers (manila, sisal, etc.), palm fibers, Igusa, straw, animal hair fiber (wool, mohair, cashmere, camel hair, alpaca, vicuna, angora, etc.), silk fiber (domestic silk, wild silk), feather, cellulosic fiber (rayon, polynosic, cupra, acetate, etc.) Etc. are illustrated.

<Textile products>
In the present invention, the textile product is a woven fabric, a knitted fabric, a non-woven fabric or the like using the hydrophobic fiber or the hydrophilic fiber, and an undershirt, a T-shirt, a shirt, a blouse, a slacks, a hat obtained by using the fabric. Products such as handkerchiefs, towels, knits, socks, underwear, and tights.

<water>
The detergent composition for textiles of the present invention may contain water. For example, water may be contained in order to bring the composition of the present invention into a liquid state at 4° C. or higher and 40° C. or lower. As water, deionized water (also referred to as ion-exchanged water) or sodium hypochlorite added to the ion-exchanged water in an amount of 1 mg/kf or more and 5 mg/kg or less can be used.

<Arbitrary ingredients>
It is preferable to adjust the pH value of the detergent composition of the present invention from the viewpoint of the stability of the appearance and quality of the detergent composition for textile products. The pH of the detergent composition for textiles of the present invention at 25° C. is preferably 3 or more, more preferably 4 or more, and preferably 9 or less, more preferably 8 or less. In the present invention, a pH adjuster can be used to adjust the pH value, and specifically, an inorganic alkaline agent selected from sodium hydroxide, potassium hydroxide, sodium carbonate, potassium carbonate and an amine compound. The organic alkali agent selected can be mentioned. As the amine compound, an amine compound represented by the following general formula (I) is suitable. The pH adjustor is appropriately added in an appropriate amount in order to adjust the pH of the detergent composition.

(In the formula, R represents a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, or a hydroxyalkyl group having 2 to 4 carbon atoms, and R′ and R″ are a hydrogen atom and 1 to 4 carbon atoms, respectively. Represents an alkyl group or a hydroxyalkyl group having 2 to 4 carbon atoms.)

Examples of the compound represented by the general formula (I) include monoethanolamine, diethanolamine, triethanolamine, N-methylpropanol and 2-amino-2-methyl-1-propanol.

Among these, hydroxides such as potassium hydroxide and sodium hydroxide are preferable as the inorganic alkaline agent, and monoethanolamine is preferable as the organic alkaline agent, from the viewpoint of compounding stability and cost of the detergent composition.

In addition to the above, the following detergent compositions (d1) to (d7) may be added to the detergent composition for textile products of the present invention.
(D1) 0.01% by mass or more and 10% by mass or less of a redeposition preventing agent and a dispersant such as polyacrylic acid, polymaleic acid and carboxymethylcellulose in the composition (d2) hydrogen peroxide, sodium percarbonate or sodium perborate, etc. 0.01% by mass or more and 10% by mass or less of the bleaching agent in the composition (d3) tetraacetylethylenediamine, the bleaching activity represented by the general formulas (I-2) to (I-7) of JP-A-6-316700. A bleaching activator such as an activator in an amount of 0.01% by mass to 10% by mass in the composition,
(D4) One or more enzymes selected from cellulases, amylases, pectinases, proteases and lipases, preferably one or more enzymes selected from amylases and proteases, in an amount of 0.001 mass% or more, preferably 0.01 Mass% or more, more preferably 0.1 mass% or more, further preferably 0.3 mass% or more, and 2 mass% or less, preferably 1 mass% or less (d5) fluorescent dye, for example, Tinopearl CBS (trade name, Ciba Specialty Chemicals) or Whitex SA (trade name, manufactured by Sumitomo Chemical Co., Ltd.) in the composition, 0.001% by mass or more and 1% by mass or less (d6) butylhydroxytoluene, distyrenated cresol, 0.01% by mass or more and 2% by mass or less (d7) of antioxidants such as sodium sulfite and sodium bisulfite in the composition (d7), an appropriate amount of a defoaming agent such as a fragrance, an antibacterial preservative, and silicone.

-Manufacture of C16 Internal Olefin a1 According to the following method, C16 internal olefin a1 as a raw material of the component (a-1) was manufactured. Regarding the internal olefin having 16 carbon atoms, the internal olefin was produced according to Production Example C of JP-A-2014-76988. The double bond distribution of the internal olefin is as follows.
The mass ratio of the internal olefin in which the position of the double bond is in the following position is 1-position/2-position/3-position/4-position/5-position/7-position/8-position=2.3%/23.6. %/18.9%/17.5%/13.7%/11.2%/6.4%/6.4% (total 100 mass%)

The double bond distribution of the internal olefin a1 was measured by gas chromatography (hereinafter, abbreviated as GC). Specifically, the internal olefin was reacted with dimethyl disulfide to form a dithiolated derivative, and then each component was separated by GC. As a result, the ratio of the double bond distribution of the internal olefin was obtained from each peak area, and the ratio was defined as the mass ratio. 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 each column.
The equipment and analysis conditions used for the measurement 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 Laboratories), detector (hydrogen flame ion detector (FID)) , Injection temperature 300°C, detector temperature 350°C, He flow rate 4.6 mL/min

[(A-1) Production of C16 Internal Olefin Sulfonic Acid]
The internal olefin a1 was subjected to a sulfonation reaction by passing a sulfur trioxide gas through a thin film sulfonation reactor having an outer jacket and cooling water at 20° C. through the outer jacket of the reactor. The SO ₃ /internal olefin molar ratio during the sulfonation reaction was set to 1.09. The obtained sulfonated product was added to an alkaline aqueous solution prepared with 1.5 mol times the theoretical acid value of potassium hydroxide, and neutralized for 1 hour at 30° C. with stirring. The neutralized product was hydrolyzed by heating at 160° C. for 1 hour in an autoclave to obtain a crude product of potassium olefin sulfonate having 16 carbon atoms. The crude product was evaporated to dryness to give internal potassium olefinsulfonate. This was designated as (a-1).

<Ingredients>
In the examples and comparative examples, the following components were used [component (a)]
(A-1): C16 internal potassium salt of internal olefin sulfonic acid produced by the above method

[(B) component]
(B-1): 0.6 mol of propylene oxide is added to 1 mol of a natural alcohol having an alkyl chain of C8:C10:C12=5:5:90 (mass ratio, the number next to C means the number of carbon atoms). The product thus obtained was sulphated with sulfur trioxide and then neutralized with an aqueous sodium hydroxide solution (10% diluted with water until neutralized to pH 11).
(B-2): Polyoxyethylene (average number of moles added: 3) sodium lauryl ether sulfate (manufactured by Kao Corporation)

[(C) component]
Component (c-1): Mixed fatty acid (manufactured by Kao Corporation) Saturated fatty acid (all straight chain) has a carbon number composition of 10 carbon atoms/12 carbon atoms/14 carbon atoms/16 carbon atoms/18 carbon atoms=1. /57/22/10/3 (mass ratio), the rest is unsaturated fatty acid, and the composition thereof is linoleic acid/linoleic acid=6/1 (mass ratio).

<Preparation of detergent composition for textile products>
The detergent compositions for textile products shown in Tables 1 to 3 were prepared using the above-mentioned components, and the following items were evaluated. The results are shown in Tables 1-3.
The detergent composition for textiles was specifically prepared as follows. A Teflon (registered trademark) stirrer piece having a length of 5 cm was placed in a glass beaker having a capacity of 200 mL to measure the mass. 10 g of ion-exchanged water at 20° C., component (c), and a predetermined amount of sodium hydroxide so that the final pH is 8.0 are added to adjust the pH, and then 100° C./min in a water bath at 40° C. Stir for 5 minutes. Sodium hydroxide was used as a 10 mass% sodium hydroxide aqueous solution. Next, in a water bath at 25° C., the components (a) and (b) were added next, and the mixture was stirred at 100 r/min for 20 minutes. Next, ion-exchanged water was added so that the mass of the content was 100 g, and the mixture was stirred again at 100 r/min for 30 seconds to obtain the detergent compositions for textile products shown in Tables 1 to 3.
Further, in the preparation of the detergent composition for textile products, the same operation as described above was performed for each composition in the table except that water was used instead of the component (c), and the component (c) was not contained. A composition was prepared.

<Method of measuring pH>
A pH measuring composite electrode (HORIBA glass lap sleeve type) is connected to a pH meter (HORIBA pH/ion meter F-23), and the power is turned on. A saturated potassium chloride aqueous solution (3.33 mol/L) is used as the pH electrode internal liquid. Next, 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 in 100 mL beakers respectively, and 25 Immerse in a constant temperature bath at ℃ for 30 minutes. The pH measuring electrode 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 1 minute is measured.

<Measuring method of German hardness of water>
〔reagent〕
-0.01 mol/l EDTA-2Na solution: 0.01 mol/l aqueous solution of ethylenediaminetetraacetic acid disodium (titration solution, 0.01 M EDTA-Na2, manufactured by Sigma-ALDRICH)
・Universal BT indicator (Product name: Universal BT, manufactured by Dojindo Laboratories Co., Ltd.)
-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 1000 ml with ion-exchanged water)
[Measurement of hardness]
(1) Collect 20 ml of sample water into a conical beaker with a whole pipette.
(2) Add 2 ml of ammonia buffer solution for hardness measurement.
(3) Add 0.5 ml of Universal BT indicator. Make sure that the solution after addition is magenta.
(4) While thoroughly shaking the conical beaker, 0.01 mol/l EDTA.2Na solution was added dropwise from the buret, and the time point at which the sample water turned blue was taken as the end point of the titration.
(5) The total hardness is calculated by the following calculation formula.
Hardness (°dH)=T×0.01×F×56.0774×100/A
T: Titration amount of 0.01 mol/l EDTA.2Na solution (mL)
A: Sample volume (20 mL, volume of sample water)
F: Factor of 0.01 mol/l EDTA/2Na solution

<Evaluation method of detergency>
(1) Preparation of model sebum artificially contaminated cloth A model sebum artificially contaminated cloth was prepared by adhering a model sebum artificially contaminated liquid having the following composition to the cloth. The adhesion of the model sebum artificial contaminant to the cloth was performed by printing the artificial contaminant on the cloth using a gravure roll coater. The step of adhering the model sebum artificial contamination solution to the cloth to produce the model sebum artificial contamination solution was carried out with a gravure roll cell volume of 58 cm ³ /m ² , a coating speed of 1.0 m/min, a drying temperature of 100° C., and a drying time of 1 min. It was As the cloth, cotton 2003 (manufactured by Tanigami Shoten) was used.
* Composition of model sebum artificial contaminated liquid: lauric acid 0.4 mass%, myristic acid 3.1 mass%, pentadecanoic acid 2.3 mass%, palmitic acid 6.2 mass%, heptadecanoic acid 0.4 mass%, stearin Acid 1.6% by mass, oleic acid 7.8% by mass, triolein 13.0% by mass, n-hexadecyl palmitate 2.2% by mass, squalene 6.5% by mass, egg white lecithin liquid crystal substance 1.9% by mass. , Kanuma red clay 8.1% by mass, carbon black 0.01% by mass, water balance (total 100% by mass)

(2) Evaluation of Detergency Five model sebum artificially contaminated cloths (6 cm×6 cm) prepared above were washed with a tergotometer (Ueshima, MS-8212) at 85 rpm for 5 minutes or 10 minutes. The washing conditions were such that the concentration of the detergent composition for textile products shown in Tables 1 to 3 or the concentration of the composition not containing the component (c) corresponding to each composition was 0.033% by mass. City water (3.5° dH, calculated by the above-mentioned water hardness measuring method, 20° C.) was injected, and washing was performed at a water temperature of 20° C. After washing, rinsed with city water (20° C.) for 3 minutes. The cleaning rate (%) was measured by the following method, and the average value of 5 sheets was obtained. The original cloth before contamination and the reflectance at 550 nm before and after washing were measured with a colorimetric color difference meter (Z-300A manufactured by Nippon Denshoku Co., Ltd.), and the washing rate (%) was calculated by the following formula (in the table). Is the average value of the cleaning rate of 5 sheets).
Washing rate (%)=100×[(reflectance after washing−reflectance before washing)/(reflectance of original cloth−reflectance before washing)]]

(3) Calculation of Cleaning Rate Improvement Rate The cleaning rate improvement rate was calculated based on the following formula. The higher the improvement rate of the cleaning rate is, the more preferable. The results are shown in Tables 1 to 3.
Improvement rate of cleaning rate (%)=[cleaning rate of composition containing component (c)/cleaning rate of composition not containing component (c)]×100-100

Claims (3)

The following (a) component, (b) component and (c) component are contained, and the (c) component is the mass ratio of the content of the (c) component and the total content of the (a) component and the (b) component. /[(A) component + (b) component] is 0.01 or more and less than 1.0, and the detergent composition for textiles.
Component (a): Internal olefin sulfonate having 16 to 24 carbon atoms (b) Component: Polyoxyalkylene alkyl ether sulfate (c) Component: Fatty acid having 10 to 20 carbon atoms or salt thereof The fiber product according to claim 1, wherein (a) component/(b) component is 0.1 or more and 10 or less, which is a mass ratio of the content of the (a) component and the content of the (b) component. Cleaning composition. The detergent composition for textiles according to claim 1 or 2, wherein the component (b) is a sulfate represented by the following general formula (1).
_{RO- (AO) n -SO 3 M} (1)
[In the formula, R is an aliphatic hydrocarbon group having 12 to 16 carbon atoms, the AO group is at least one group selected from alkyleneoxy groups having 2 or 3 carbon atoms, and n is an average. It is the number of added moles and is 0.5 or more and 5 or less, and M is a cation. ]