Detergent composition

Abstract

To provide a detergent composition in which the adsorption amount of an antioxidant is improved.SOLUTION: A detergent composition comprises (a) a predetermined antioxidant and (b) a component represented by general formula (b1), R1b-O-(EO)s-H (where R1b is a primary or secondary alkyl group having 8 to 24 carbon atoms, EO represents an ethyleneoxy group, and s is an average number of added moles and is a number greater than or equal to 0 and less than 7.)SELECTED DRAWING: None

Description

Technical Field

[0001] The present invention relates to a detergent composition and a method for washing fiber products.

Background Art

[0002] Stains such as sebum derived from the human body adhering to fiber products such as clothing are usually removed by washing. However, during repeated contamination and washing, stains that cannot be completely removed accumulate during washing. Such stains remaining on the fibers cause the generation of malodorous substances and yellowing due to spontaneous natural oxidation over time, leading to olfactory and visual problems. As a means of preventing the oxidation phenomenon of stains that cause the formation of malodorous substances and yellowing substances, it is known to use antioxidants.

[0003] Patent Document 1 discloses a method for reducing malodor on a fabric by using a detergent composition containing an alkylated phenol antioxidant, a hindered phenol antioxidant, or a mixture thereof. Further, Patent Document 2 discloses a method for treating an elastane-containing fabric, which includes a step of bringing a fabric treatment composition containing an antioxidant and a surfactant into contact with the elastane-containing fabric in the presence of water. Patent Document 3 discloses a liquid laundry detergent composition containing (a) a hindered phenol antioxidant, (b) a nonionic surfactant, and (c) an anionic surfactant in a predetermined content.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Patent Document 3

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, during the washing cycle, since many of the antioxidants incorporated in the washing composition are washed away together with the washing liquid, it is difficult to efficiently adsorb them onto the fibers and obtain antioxidant ability. In addition, the release of a large amount of antioxidants into the environment is a concern as it may lead to environmental problems. Therefore, it is required to reduce the amount of the antioxidant washed away and to more efficiently adsorb the antioxidant onto fibers or the like. By efficiently adsorbing the antioxidant onto fibers or the like, a higher antioxidant effect against stains can be obtained, and an effect of suppressing the generation of malodors and yellowing can be obtained. The present invention provides a detergent composition and a method for washing a fiber product, in which the adsorption amount of the antioxidant is improved.

Means for Solving the Problems

[0006] The present invention relates to a detergent composition containing the following component (a) and component (b).

[0007] Component (a): One or more compounds selected from the following component (a1), component (a2), and component (a3) Component (a1): A compound represented by the following general formula (a1)

[0008]

Chemical formula

[0009] [In the formula, R 1a represents a hydrogen atom or a linear or branched alkyl group having 1 to 4 carbon atoms, n represents 1 or 2, Y represents an oxygen atom or -NH-, Y is bonded to R 2a , and when n represents 1, R 2a represents a hydrogen atom or a linear or branched alkyl group having 1 to 25 carbon atoms, and when n represents 2, R 2arepresents an alkylene group having 2 to 12 carbon atoms, an alkylene group having 4 to 12 carbon atoms interrupted by an oxygen atom or a sulfur atom, or a direct bond.

[0010] (Component (a2): Amine-based antioxidant (Component (a3): Bisphenol-based antioxidant (excluding those corresponding to component (a1)))

[0011] (Component (b): A compound represented by the following general formula (b1) R 1b -O-(EO) s -H (b1) [In the formula, R 1b is a primary or secondary alkyl group having 8 to 24 carbon atoms, EO is an ethyleneoxy group, s is the average number of moles of addition of EO, and is a number of 0 or more and less than 7.

[0012] The present invention also relates to a method for washing a textile product, which comprises bringing the detergent composition of the present invention into contact with the textile product.

Advantages of the Invention

[0013] According to the present invention, there are provided a detergent composition and a method for washing a textile product, in which the adsorption amount of the antioxidant is improved.

Embodiments for Carrying Out the Invention

[0014] The reason why the adsorption amount of the antioxidant (predetermined antioxidant (component (a))) is improved by the detergent composition of the present invention is not necessarily clear, but is presumed as follows. It is presumed that the component (b) improves the wettability of the surface of the object to be washed, such as a textile product, so that the detergent composition easily penetrates into the details of the object to be washed. Further, it is presumed that the interaction between the component (a) and the component (b) further promotes the adsorption of the component (a) to the object to be washed. The synergistic effect of the component (a) and the component (b) contributes to the improvement of the adsorption amount of a predetermined antioxidant which is the component (a). By improving the adsorption amount of the component (a) to the object to be cleaned, the ability of the cleaning composition to prevent oxidation of sebum, suppress generation of malodor, and suppress yellowing is improved. Note that the cleaning composition and the method for cleaning textile products of the present invention are not limited to the above-described mechanism of action.

[0015] <Cleaning composition> The cleaning composition of the present invention contains the following component (a) and component (b). The cleaning composition of the present invention may be a liquid cleaning composition containing the component (a), the component (b), and water.

[0016] Component (a): One or more compounds selected from the following components (a1), (a2), and (a3) Component (a1): A compound represented by the following general formula (a1)

[0017]

Chemical formula

[0018] [In the formula, R 1a represents a hydrogen atom or a linear or branched alkyl group having 1 to 4 carbon atoms, n represents 1 or 2, Y represents an oxygen atom or -NH-, Y is bonded to R 2a , and when n represents 1, R 2a represents a hydrogen atom or a linear or branched alkyl group having 1 to 25 carbon atoms, and when n represents 2, R 2a represents an alkylene group having 2 to 12 carbon atoms, an alkylene group having 4 to 12 carbon atoms interrupted by an oxygen atom or a sulfur atom, or a direct bond. ]

[0019] Component (a2): An amine-based antioxidant Component (a3): A bisphenol-based antioxidant (excluding those corresponding to the component (a1))

[0020] (b) Component: A compound represented by the following general formula (b1) R 1b -O-(EO) s -H (b1) [In the formula, R 1b is a primary or secondary alkyl group having 8 to 24 carbon atoms, EO is an ethyleneoxy group, s is the average number of moles of EO added, and is a number of 0 or more and less than 7.]

[0021] <(a) Component> (a) The component is one or more compounds selected from the (a1) component, (a2), and (a3) components. The (a) component can be used alone or in combination of two or more. The (a) component may be an antioxidant, or further an antioxidant.

[0022] <(a1) Component> (a1) The component is a compound represented by the above general formula (a1). In the general formula (a1), R 1a is a hydrogen atom or a linear or branched alkyl group having 1 to 4 carbon atoms. R 1a is preferably a methyl group, an ethyl group, a butyl group, or a 1,1-dimethylethyl group, and more preferably a methyl group, from the viewpoint of improving the adsorption amount of the antioxidant. R 1a The alkyl group of may be linear or branched from the viewpoint of improving the adsorption amount of the antioxidant. When the (a1) component has a plurality of R 1a in one molecule, the plurality of R 1a may be the same or different. In the general formula (a1), n is 1 or 2. n is preferably 1 from the viewpoint of improving the adsorption amount of the antioxidant. In the general formula (a1), Y is an oxygen atom or -NH-. Y is bonded to R 2a From the viewpoint of improving the adsorption amount of the antioxidant, an oxygen atom is preferred. When the (a1) component has a plurality of Y in one molecule, the plurality of Y may be the same or different. In the general formula (a1), when n is 1, R 2ais a hydrogen atom or a linear or branched alkyl group having 1 to 25 carbon atoms. R 2a The number of carbon atoms of the linear or branched alkyl group is 1 or more and 25 or less, preferably 18 or less, more preferably 8 or less, from the viewpoint of improving the adsorption amount of the antioxidant. R 2a The alkyl group of R is linear or branched, preferably linear, from the viewpoint of improving the adsorption amount of the antioxidant. R 2a From the viewpoint of improving the adsorption amount of the antioxidant, R is preferably a hydrogen atom, a methyl group, an ethyl group, a butyl group, an octyl group or an octadecyl group, more preferably a methyl group, an ethyl group, an octyl group or an octadecyl group, and still more preferably a methyl group or an octyl group. In the general formula (a1), when n is 2, R 2a is an alkylene group having 2 to 12 carbon atoms, an alkylene group having 4 to 12 carbon atoms interrupted by an oxygen atom or a sulfur atom, or a direct bond. R 2a The number of carbon atoms of the alkylene group having 2 to 12 carbon atoms is 2 or more, preferably 4 or more, and 12 or less, preferably 8 or less, more preferably 6 or less, from the viewpoint of improving the adsorption amount of the antioxidant. The number of carbon atoms of the alkylene group having 4 to 12 carbon atoms interrupted by an oxygen atom or a sulfur atom is 4 or more and 12 or less, preferably 8 or less, more preferably 6 or less, from the viewpoint of improving the adsorption amount of the antioxidant. R 2a From the viewpoint of improving the adsorption amount of the antioxidant, R is preferably a direct bond, a hexamethylene group, -CH2CH2-O-CH2CH2-O-CH2CH2-, or -CH2CH2-S-CH2CH2-, more preferably a direct bond, a hexamethylene group, or -CH2CH2-O-CH2CH2-O-CH2CH2-.

[0023] <Component (a2)> The component (a2) is an amine-based antioxidant. In the present invention, the amine-based antioxidant means an antioxidant having at least one group selected from primary amino groups, secondary amino groups, and tertiary amino groups in the molecule. Examples of specific antioxidants of the component (a2) include compounds represented by the following general formula (a2) from the viewpoint of improving the adsorption amount of the antioxidant.

[0024]

Chemical formula

[0025] [In the formula, R 3a is hydrogen, an alkyl group or an aryl group, and R 4a is an alkyl group or an aryl group. The alkyl group or aryl group may each independently be substituted with a hydroxyl group, an alkoxy group having 1 to 4 carbon atoms, and a hydrocarbon group having 1 to 18 carbon atoms.]

[0026] Other specific examples of the component (a2) include diphenylamine, N-allyldiphenylamine, N-phenyl-1-naphthylamine, N-(4-tert-octylphenyl)-1-naphthylamine, N-phenyl-2-naphthylamine, octylated diphenylamine, for example p,p'-di-tert-octyldiphenylamine, 4-n-butylaminophenol, 4-butyrylaminophenol, bis[4-(1',3'-dimethylbutyl)phenyl]amine, tert-octylated N-phenyl-1-naphthylamine from the viewpoint of improving the adsorption amount of the antioxidant. In addition, as other amine-based antioxidants, one or more selected from mixtures of mono- and dialkylated tert-butyl / tert-octyldiphenylamine, mixtures of mono- and dialkylated nonyldiphenylamine, mixtures of mono- and dialkylated dodecyldiphenylamine, mixtures of mono- and dialkylated isopropyl / isohexyldiphenylamine, mixtures of mono- and dialkylated tert-butyldiphenylamine, reaction products of benzenamine, N-phenyl- with 2,4,4-trimethylpentene (such as Irganox 5057 sold by BASF, CAS No. 68411-46-1), etc. are preferred, and one or more selected from reaction products of benzenamine, N-phenyl- with 2,4,4-trimethylpentene (CAS No. 68411-46-1) are more preferred.

[0027] <(a3) component> (The (a3) component is a bisphenol-based antioxidant [excluding those corresponding to the (a1) component]. Here, the bisphenol-based antioxidant refers to a compound having two phenol skeletons.) (From the viewpoint of improving the adsorption amount of the antioxidant, the (a3) component is preferably a compound represented by the following general formula (a3).)

[0028] [Chemical formula]

[0029] [In the formula, R 5a , R 6a are each independently a hydrogen atom, a halogen atom, or an alkyl group or an alkoxy group having 1 to 5 carbon atoms. R 7a is a sulfur atom, an oxygen atom, or a structure represented by the following general formula (a3-1).)

[0030] [Chemical formula] [In the formula, R 8a , R 9ais, independently, a hydrogen atom, an alkyl group having 1 to 5 carbon atoms, or an alkoxy group.

[0031] In general formula (a3), R 5a From the viewpoint of improving the adsorption amount of the antioxidant, a hydrogen atom, a methyl group, an ethyl group, a butyl group, a propyl group, a methoxy group, or an ethoxy group is preferable, a methyl group or an ethyl group is more preferable, and an ethyl group is still more preferable. In general formula (a3), R 6a From the viewpoint of improving the adsorption amount of the antioxidant, a hydrogen atom, a methyl group, an ethyl group, a butyl group, a propyl group, a methoxy group, or an ethoxy group is preferable, a methyl group or an ethyl group is more preferable, and an ethyl group is still more preferable. In general formula (a3), R 7a is preferably a sulfur atom or a structure represented by general formula (a3-1), and a structure represented by general formula (a3-1) is more preferable. In general formula (a3-1), R 8a From the viewpoint of improving the adsorption amount of the antioxidant, a hydrogen atom, a methyl group, an ethyl group, a butyl group, a propyl group, a pentyl group, a methoxy group, or an ethoxy group is preferable, and a hydrogen atom is more preferable. In general formula (a3-1), R 9a From the viewpoint of improving the adsorption amount of the antioxidant, a hydrogen atom, a methyl group, an ethyl group, a butyl group, a propyl group, a pentyl group, a methoxy group, or an ethoxy group is preferable, a hydrogen atom or a propyl group is more preferable, and a hydrogen atom is still more preferable.

[0032] (a3) component, from the perspective of improving the adsorption amount of the antioxidant, is preferably at least one selected from 2,2'-methylenebis[6-(1,1-dimethylethyl)-4-methylphenol], 4,4'-methylenebis[2,6-bis(1,1-dimethylethyl)-phenol], 2,2'-methylenebis[6-(1,1-dimethylethyl)-4-ethylphenol], 4,4'-thiobis[2-(1,1-dimethylethyl)-6-methylphenol], 2,2'-thiobis[6-(1,1-dimethylethyl)-4-methylphenol], 2,2'-butylidenebis[6-(1,1-dimethylethyl)-4-methylphenol], 4,4'-butylidenebis[(6-t-butyl-3-methylphenol)], 2,2'-ethylidenebis[4,6-bis(1,1-dimethylethyl)]phenol, 4,4'-(1-methylethylidene)bis[2-(1,1-dimethylethyl)phenol], 4,4'-thiobis[2,6-bis(1,1-dimethylethyl)phenol], and 4,4'-(1-methylethylidene)bis[2,6-bis(1,1-dimethylethyl)phenol], and more preferably at least one selected from 2,2'-methylenebis[6-(1,1-dimethylethyl)-4-ethylphenol] and 4,4'-butylidenebis[(6-t-butyl-3-methylphenol)]. That is, from the perspective of improving the adsorption amount of the antioxidant, the (a3) component, in the general formula (a3), 5a where R is a methyl group or an ethyl group, R 6a is a methyl group or an ethyl group, R 7a is a sulfur atom or a structure represented by the general formula (a3-1), R 8a is a hydrogen atom, and R 9a is a hydrogen atom or a propyl group, and a compound is preferable; R 5a is a methyl group or an ethyl group, R 6a is a methyl group or an ethyl group, R 7a is a structure represented by the general formula (a3-1), R 8a is a hydrogen atom, and R 9a is a hydrogen atom or a propyl group, and a compound is more preferable; R 5a is an ethyl group, R 6a is an ethyl group, R 7a is a structure represented by the general formula (a3-1),8a is a hydrogen atom, and R 9a is a hydrogen atom or a propyl group is more preferable.

[0033] <(Component (b))> (Component (b)) is a compound represented by the following general formula (b1). (Component (b)) can be used alone or in combination of two or more. R 1b -O-(EO) s -H (b1)

[0034] [In the formula, R 1b is a primary or secondary alkyl group having 8 or more and 24 or less carbon atoms, EO is an ethyleneoxy group, s is the average number of moles of addition of EO, and is a number of 0 or more and less than 7. ]

[0035] In general formula (b1), R 1b is a primary or secondary alkyl group having 8 or more and 24 or less carbon atoms. The number of carbon atoms of R 1b is 8 or more, preferably 10 or more, more preferably 12 or more, still more preferably 14 or more, and 24 or less, preferably 18 or less, more preferably 16 or less, from the viewpoint of improving the adsorption amount of the antioxidant. R 1b is preferably a secondary alkyl group from the viewpoint of improving the adsorption amount of the antioxidant. Here, the secondary alkyl group is a residue obtained by removing a hydroxyl group from a secondary alcohol. More specifically, in general formula (b1), R 1b in -O- is a group in which the carbon atom of R 1b bonded to O is a secondary carbon atom. In general formula (b1), EO is an ethyleneoxy group. s is the average number of moles of addition of EO, and is 0 or more, preferably 2 or more, and less than 7, preferably 5 or less, more preferably 3 or less, from the viewpoint of improving the adsorption amount of the antioxidant.

[0036] <Composition, etc.> From the perspective of improving the adsorption amount of the antioxidant, the cleaning composition of the present invention contains component (a) preferably in an amount of 0.001% by mass or more, more preferably 0.01% by mass or more, and preferably 10% by mass or less, more preferably 1% by mass or less, still more preferably 0.2% by mass or less, even more preferably 0.12% by mass or less, and even more preferably 0.06% by mass or less.

[0037] From the perspective of improving the adsorption amount of the antioxidant, the cleaning composition of the present invention contains component (b) preferably in an amount of 1% by mass or more, more preferably 2% by mass or more, still more preferably 4% by mass or more, even more preferably 7% by mass or more, even more preferably 10% by mass or more, even more preferably 15% by mass or more, and preferably 30% by mass or less, more preferably 22% by mass or less.

[0038] From the perspective of improving the adsorption amount of the antioxidant, in the cleaning composition of the present invention, the mass ratio (a) / (b) of the content of component (a) to the content of component (b) in the composition is preferably 0.0001 or more, more preferably 0.001 or more, and preferably 1 or less, more preferably 0.2 or less, still more preferably 0.02 or less, even more preferably 0.01 or less, even more preferably 0.006 or less, even more preferably 0.005 or less, and even more preferably 0.003 or less.

[0039] The cleaning composition of the present invention preferably contains water. As the water, ion-exchanged water, tap water, purified water, etc. can be used. The water can be used in an amount such that, as the balance of the composition, the total composition of the composition is 100% by mass. From the perspective of improving the adsorption amount of the antioxidant, the cleaning composition of the present invention contains water preferably in an amount of 10% by mass or more, more preferably 30% by mass or more, still more preferably 50% by mass or more, and preferably 90% by mass or less, more preferably 85% by mass or less.

[0040] The detergent composition of the present invention may optionally contain a surfactant other than the component (b), an alkali agent, a chelating agent, an anti-redeposition agent and / or a polymeric dispersant, a bleaching agent, a bleach activator, an enzyme, a fluorescent dye, an antioxidant other than the component (a), a pigment, a fragrance, an antibacterial agent, an antifoaming agent such as silicone, an organic solvent having a hydroxyl group, and a hydrotrope agent.

[0041] The pH of the detergent composition of the present invention is not particularly limited, but can be set in consideration of viewpoints such as improving the adsorption amount of the antioxidant. For example, the pH at 25°C may be 3 or more, further 5 or more, further 7 or more, and 12 or less, further 11 or less, further 10 or less. The pH is a value measured at 25°C using a glass electrode. Specifically, it is measured by the following method.

[0042] <Method for Measuring pH> Calibrate the pH electrode (model 6367) of the pH meter D-52 manufactured by Horiba, Ltd. in advance with a phthalic acid buffer solution (pH 4.01), a phosphate standard solution (pH 6.84), and a borate standard solution (pH 9.18), and rinse it thoroughly with ion-exchanged water. Insert the pH electrode calibrated and rinsed as described above into the detergent composition adjusted to 25°C, and measure using the AUTO HOLD mode of the pH meter until the measured value becomes constant.

[0043] The detergent composition of the present invention can be targeted at textile products containing various fibers. The fibers constituting the textile products may be either hydrophobic fibers or hydrophilic fibers. Also, the fibers may be any of natural fibers, chemical fibers, or a mixture thereof. Examples of hydrophobic fibers include protein-based fibers (such as milk protein casein fibers, Promix, etc.), polyamide-based fibers (such as nylon, etc.), polyester-based fibers (such as polyester, etc.), polyacrylonitrile-based fibers (such as acrylic, etc.), polyvinyl alcohol-based fibers (such as vinylon, etc.), polyvinyl chloride-based fibers (such as polyvinyl chloride, etc.), polyvinylidene chloride-based fibers (such as vinylidene, etc.), polyolefin-based fibers (such as polyethylene, polypropylene, etc.), polyurethane-based fibers (such as polyurethane, etc.), polyvinyl chloride / polyvinyl alcohol copolymer-based fibers (such as polyclaral, etc.), polyalkylene paraoxybenzoate-based fibers (such as benzoate, etc.), polyfluoroethylene-based fibers (such as polytetrafluoroethylene, etc.), glass fibers, carbon fibers, alumina fibers, silicon carbide fibers, rock fibers (rock fiber), slag fibers (slag fiber), metal fibers (such as gold thread, silver thread, steel fiber), etc. Examples of hydrophilic fibers include seed hair fibers (such as cotton, kapok, etc.), bast fibers (such as hemp, flax, ramie, cannabis, jute, etc.), leaf vein fibers (such as Manila hemp, sisal hemp, etc.), coconut fiber, rush, straw, animal hair fibers (such as wool, mohair, cashmere, camel hair, alpaca, vicuña, angora, etc.), silk fibers (such as mulberry silk, wild silk), feathers, cellulose-based fibers (such as rayon, polynosic, cupra, acetate, etc.). In the present invention, textile products mean fabrics such as woven fabrics, knitted fabrics, non-woven fabrics, etc. using these various fibers, and textile products obtained using them, for example, products such as undershirts, T-shirts, dress shirts, hats, handkerchiefs, towels, masks, etc. Preferred textile products are woven fabrics such as woven fabrics, knitted fabrics, etc. and textile products made of woven fibers.

[0044] The detergent composition of the present invention may be a liquid detergent composition comprising component (a), component (b), and water. In this liquid detergent composition, the content of each of the above components can be applied by replacing it with the blending amount of each component in all the components to be blended. The detergent composition of the present invention may further be a liquid detergent composition for textile products.

[0045] <Method for washing textile products> The present invention provides a method for washing textile products, which involves bringing the detergent composition of the present invention into contact with textile products. The method for washing textile products of the present invention may be a method for washing textile products, which involves bringing a treatment liquid containing the detergent composition of the present invention and water [hereinafter also referred to as the treatment liquid of the present invention] into contact with the textile products. In the method for washing textile products of the present invention, the matters described for the detergent composition of the present invention can be applied. The specific examples and preferred examples of component (a) and component (b) in the method for washing textile products of the present invention are also the same as those of the detergent composition of the present invention. Further, as the textile products to be washed in the method for washing textile products of the present invention, the textile products described for the detergent composition of the present invention can be mentioned. In the method for washing textile products of the present invention, the treatment liquid prepared from the detergent composition of the present invention can be used. If the composition is appropriate for washing, the detergent composition of the present invention may be used as the treatment liquid as it is. The treatment liquid of the present invention may be a treatment liquid obtained by mixing component (a), component (b), and water. In this treatment liquid, the content of each component described below can be applied by replacing it with the mixing amount of each component in all the components to be mixed.

[0046] In the method for washing textile products of the present invention, the pH of the treatment liquid of the present invention is not particularly limited, but from the viewpoint of improving the adsorption amount of the antioxidant, the pH at 25°C may be, for example, 3 or more, further 5 or more, further 7 or more, and 12 or less, further 11 or less, further 10 or less. The pH is a value measured at 25°C using a glass electrode, and specifically, it can be measured in the same manner as the pH of the detergent composition of the present invention.

[0047] <Composition, etc.> The treatment liquid of the present invention contains component (a) preferably at 0.01 ppm or more, more preferably at 0.1 ppm or more, and preferably at 100 ppm or less, more preferably at 10 ppm or less, still more preferably at 2 ppm or less, even more preferably at 1.2 ppm or less, and even more preferably at 0.6 ppm or less, from the viewpoint of improving the adsorption amount of the antioxidant.

[0048] The treatment liquid of the present invention contains component (b) preferably at 10 ppm or more, more preferably at 20 ppm or more, still more preferably at 40 ppm or more, even more preferably at 70 ppm or more, even more preferably at 100 ppm or more, even still more preferably at 150 ppm or more, and preferably at 300 ppm or less, more preferably at 220 ppm or less, from the viewpoint of improving the adsorption amount of the antioxidant.

[0049] From the viewpoint of improving the adsorption amount of the antioxidant, the mass ratio (a) / (b) of the content of component (a) to the content of component (b) in the treatment liquid is preferably 0.0001 or more, more preferably 0.001 or more, and preferably 1 or less, more preferably 0.2 or less, still more preferably 0.02 or less, even more preferably 0.01 or less, even more preferably 0.006 or less, even more preferably 0.005 or less, and even more preferably 0.003 or less.

[0050] The method for washing a fiber product of the present invention can be carried out, for example, by incorporating it into the washing step in the washing of the fiber product. In that case, the washing conditions can conform to normal washing. When the method for washing a fiber product of the present invention is carried out by incorporating it into the washing step of washing, from the viewpoint of improving the adsorption amount of the antioxidant, a treatment liquid obtained by diluting the detergent composition of the present invention with water at a dilution ratio of preferably 500 times or more, more preferably 800 times or more, and preferably 5,000 times or less, more preferably 3,000 times or less can be used.

Examples

[0051] The detergent compositions shown in Table 1 were prepared, and the adsorption promotion rate of the antioxidant, which is the component (a), was evaluated. The detergent composition of the present invention contains the component (b), and it can be easily understood that it has a cleaning effect on dirt adhering to, for example, textile products.

[0052] <Evaluation Method for Adsorption Promotion Rate of Antioxidant> (1) Preparation of Test Cloth As the fiber product for evaluation, a cotton knit fabric (purchased from Tanigami Shoten) was used. The 6 cm × 6 cm cotton knit fabric was washed with a cleaning solution prepared using each of the various detergent compositions described in the table. Specifically, 30 g of the above-mentioned cotton knit fabric and 600 mL of the cleaning solution were put into a stirring-type detergency tester (Tergotometer, manufactured by Ueshima Seisakusho), washed at 85 rpm for 10 minutes, and then dehydrated for 1 minute in the dehydration tank of a two-layer washing machine PS-H35L (Hitachi). The dehydrated test cloth was put into 600 mL of tap water and rinsed with a stirring-type detergency tester at 85 rpm for 3 minutes. It was dehydrated for 1 minute in the dehydration tank of the two-tank washing machine and naturally dried to obtain a test cloth.

[0053] (2) Evaluation of Adsorption Promotion Rate Twelve arbitrarily selected dried test cloths were sealed in a screw tube No. 8, and the mass of the test cloth was measured. Then, 50 mL of a 1 / 1 (v / v) methanol / chloroform solution was added thereto, and the antioxidant ((a) component) remaining on the test cloth was extracted by ultrasonic treatment for 30 minutes. The supernatant was filtered through a PTFE filter (manufactured by Pall Corporation, pore size: 0.45 μm) to obtain a measurement solution. Next, a calibration curve solution set at a known concentration was prepared by serially diluting the antioxidant solution with the above-mentioned methanol / chloroform solution. The amount of antioxidant in the measurement solution was analyzed using a liquid chromatograph (LC) device, and the residual amount on the test cloth (antioxidant (g) / fabric (g)) was calculated from the calibration curve. The adsorption promotion rate (times) was calculated as the value obtained by dividing the adsorption amount of the antioxidant on the fabric treated with each cleaning solution by the adsorption amount of the antioxidant on the fabric treated with the cleaning solution without the component (b). The results are shown in Table 1. The higher the adsorption promotion rate of the composition, the larger the residual amount of the component (a) remaining on the fiber, and it is excellent in improving the adsorption amount of the antioxidant. The liquid chromatograph was used under the following conditions with the following apparatus. Apparatus: Hitachi L-2420 UV detector, Auto-sampler L-2200 Column: L-column ODS (4.6*150mm) 5μm Column temperature: 40°C Eluent A: H2O, Eluent B: acetonitrile Gradient: Eluent A / B = 60 / 40 (2 minutes) → Eluent A / B = 0 / 100 (10 - 25 minutes) → Eluent A / B = 60 / 40 (26 - 36 minutes) Flow rate: 1.0 mL / min Injection volume: 20 μL Detection: UVD 285 nm

[0054]

Table 1

[0055] The components in the table are as follows. <(a) component> (a-1): 3,5-bis(1,1-dimethylethyl)-4-hydroxy-benzenepropanoic acid, methyl ester; CAS No. 6386-38-5 (a-2): 3-(1,1-dimethylethyl)-4-hydroxy-5-methylbenzenepropanoic acid, methyl ester; CAS No. 6386-39-6 (a-3): 3,5-bis(1,1-dimethylethyl)-4-hydroxy-benzenepropanoic acid, octyl ester; CAS No. 125643-61-0 (a-4): 2,2'-methylenebis[6-(1,1-dimethylethyl)-4-ethylphenol; CAS No. 88-24-4 (a-5): 4,4'-butylidenebis-(6-t-butyl-3-methylphenol); CAS No. 85-60-9 (a-6): Benzenamine, N-phenyl-, reaction product with 2,4,4-trimethylpentene, CAS No. 68411-46-1

[0056] <(b) component> (b-1): A nonionic surfactant obtained by adding an average of 3 moles of ethylene oxide to a secondary alcohol having 12 to 14 carbon atoms (b-2): A nonionic surfactant obtained by adding an average of 3 moles of ethylene oxide to a primary alcohol having 12 to 14 carbon atoms

[0057] <Component (b’)> Component (b’) is a comparative component of component (b). (b’-1): A nonionic surfactant obtained by adding an average of 7 moles of ethylene oxide to a secondary alcohol having 12 to 14 carbon atoms (b’-2): A nonionic surfactant obtained by adding an average of 10 moles of ethylene oxide to a primary alcohol having 12 to 14 carbon atoms

Claims

Claim 1 A detergent composition containing the following component (a) and component (b). Component (a): One or more compounds selected from the following component (a1), component (a2), and component (a3) Component (a1): A compound represented by the following general formula (a1) 【Chemical 1】 [wherein, R １ａ represents a hydrogen atom or a linear or branched alkyl group having 1 to 4 carbon atoms, n represents 1 or 2, Y represents an oxygen atom or -NH-, Y is bonded to R ２ａ , and when n represents 1, R ２ａ represents a hydrogen atom or a linear or branched alkyl group having 1 to 25 carbon atoms, and when n represents 2, R ２ａ represents an alkylene group having 2 to 12 carbon atoms, an alkylene group having 4 to 12 carbon atoms interrupted by an oxygen atom or a sulfur atom, or a direct bond.] Component (a2): An amine-based antioxidant Component (a3): A bisphenol-based antioxidant (excluding those corresponding to component (a1)) Component (b): A compound represented by the following general formula (b1) R １ｂ -O-(EO) ｓ -H (b1) [In the formula, R １ｂ is a primary or secondary alkyl group having 8 to 24 carbon atoms, EO is an ethyleneoxy group, s is the average number of moles added, and is a number of 0 or more and less than 7. 〕 Claim 2 The detergent composition according to Claim 1, wherein in general formula (b1), s is 2 or more and 5 or less. Claim 3 In the general formula (b1), R １ｂ is a secondary alkyl group, and the detergent composition according to claim 1 or 2. Claim 4 A method for washing a textile product, comprising bringing the detergent composition according to Claim 1 or 2 into contact with the textile product.

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