JP2024093419A - Liquid cleaning products - Google Patents

Abstract

[Problem] To provide a liquid detergent article that can maintain a uniform appearance by simultaneously suppressing excessive yellowing and suppressing pigment fading when exposed to sunlight.
[Solution] The liquid detergent article is a liquid detergent containing component (A): a water-soluble colorant preparation having an absorbance peak at a wavelength of 400 to 550 nm, component (B): an antioxidant, component (C): an alkanolamine, and component (D): a surfactant, filled in a colorless, transparent or colorless, translucent container, wherein the liquid detergent has an absorbance peak at a wavelength of 400 to 550 nm, and when the absorbance at the maximum absorption wavelength (W _M ) of the liquid detergent is 0.03 or more, the retention rate of absorbance calculated from the following formula when a specified sunlight exposure test is conducted is 50% or more.
Absorbance retention rate (%)=(absorbance of liquid detergent after sunlight exposure test at maximum absorption wavelength (W _M )/absorbance of liquid detergent before sunlight exposure test at maximum absorption wavelength (W _M ))×100
[Selection diagram] None

Description

The present invention relates to a liquid cleaning product.

There are two general types of detergents for textile products, such as clothing, which are powder detergents and liquid detergents. Demand for liquid detergents is growing because there is no risk of residual detergent remaining and they can be applied to clothing.

In some cases, liquid detergents are colored by blending them with a dye in order to improve the aesthetics of the liquid detergent, to facilitate measurement by cap, and to facilitate refilling from a refill pouch to a bottle. For example, Patent Document 1 discloses a detergent product in which a liquid detergent containing a nonionic surfactant and a dye having a quinone skeleton is filled in a transparent or translucent container.

JP 2021-42336 A

Containers for holding liquid detergents usually have the ingredients and other information displayed by printing or labeling, but if a colorless, transparent or colorless, translucent container is used, it is also possible to print or label the container in a color that matches the color of the liquid detergent.
However, when a colored liquid detergent is filled in a colorless, transparent or colorless, translucent container, there is a problem that the color of the dye fades due to exposure to sunlight. In particular, when the liquid detergent contains linear alkylbenzene sulfonic acid or its salt, which has a high color value, as a surfactant, the color of the dye tends to fade. When the color of the dye contained in the liquid detergent fades, it affects the color and appearance of the printing and label that are matched to the color of the liquid detergent, and the printing and label may become difficult to see.

Furthermore, liquid detergents may discolor during storage, such as turning yellow. In particular, liquid detergents tend to turn yellow when stored in a high-temperature environment or when they contain nitrogen-containing compounds such as monoethanolamine or fragrances.
For example, yellowing of liquid cleaners colored yellow or orange is less noticeable than that of liquid cleaners colored cooler colors. Also, in the case of liquid cleaners colored yellow or orange, yellowing has the effect of compensating for the yellowness. However, if there is excessive yellowing or fading, even liquid cleaners colored yellow or orange will have an impact on their appearance.

The present invention aims to provide a liquid detergent article that can maintain a uniform appearance while simultaneously preventing excessive yellowing and preventing pigment fading when exposed to sunlight.

The present invention has the following aspects.
[1] Component (A): a water-soluble dye preparation having an absorbance peak at 400 to 550 nm;
(B) component: an antioxidant;
(C) component: alkanolamine,
(D) component: a surfactant,
A liquid detergent article in which a liquid detergent containing the above is filled in a colorless, transparent or colorless, translucent container,
The liquid cleaning agent has an absorbance peak at a wavelength of 400 to 550 nm,
When the absorbance of the liquid detergent at the maximum absorption wavelength (W _M ) is 0.03 or more, the liquid detergent article has an absorbance retention rate of 50% or more, calculated from the following formula (i) when a sunlight exposure test is carried out at a wavelength of 300 to 400 nm until an integrated exposure amount reaches 15 MJ/m ² :
Absorbance retention rate (%)=(absorbance of liquid cleaner after sunlight exposure test at maximum absorption wavelength (W _M )/absorbance of liquid cleaner before sunlight exposure test at maximum absorption wavelength (W _M ))×100 (i)
[2] The liquid detergent article of [1], wherein the content of the (D) component is 35 mass% or more based on the total mass of the liquid detergent.
[3] The component (D) contains a component (D1-1): linear alkylbenzene sulfonic acid and/or a salt thereof,
The liquid detergent article according to the above [1] or [2], wherein the mass ratio of the component (D1-1) to the component (D) is 0.16 to 0.36.
[4] The liquid detergent article according to any one of [1] to [3], wherein the component (B) contains at least one of dibutylhydroxytoluene and L-ascorbic acid.
[5] The liquid detergent article according to any one of the above [1] to [4], wherein the container contains an ultraviolet absorber having a benzotriazole structure or a benzoxazinone structure.

The present invention provides a liquid detergent article that can maintain a uniform appearance while simultaneously preventing excessive yellowing and preventing pigment fading when exposed to sunlight.

1 is a perspective view showing an example of a liquid detergent article of the present invention. FIG. 2 is a front view showing another example of the liquid detergent article of the present invention.

The present invention will be described in detail below.
The liquid detergent article of the present invention is a liquid detergent product in which the liquid detergent described below is filled in a colorless, transparent or colorless, translucent container.

[Liquid cleaning agent]
<Color>
The liquid detergent has an absorbance peak at a wavelength of 400 to 550 nm. That is, the liquid detergent is colored in a color that falls within the range of 5YR to 5Y on the Munsell color wheel. Examples of the color of the liquid detergent include orange and yellow.
The color of the liquid detergent can be adjusted by changing the type and content of component (A) described below.
The absorbance of the liquid cleaner is measured using a UV-Vis spectrophotometer.

From the viewpoint of superior aesthetics, it is preferable that the liquid detergent is transparent and homogeneous.
In this specification, "the liquid detergent is transparent" means that it is colored and transparent, and more specifically, that it has a minimum transmittance (% Tmin) of 80% T or more in the wavelength range of 750 to 800 nm, where a yellow or orange colored liquid detergent shows no absorbance.
The %Tmin value is the minimum transmittance when the transmittance is measured in the wavelength region of 750 to 800 nm using a U-3900 spectrophotometer (60 mmφ integrating sphere, manufactured by Hitachi, Ltd.).
In addition, in this specification, "the liquid detergent is homogeneous" means that no precipitation, sedimentation, or phase separation occurs even when the liquid detergent is left to stand for 30 days, or even if one or more of precipitation, precipitation, and phase separation occurs, the precipitation, precipitation, and phase separation are resolved by leaving the liquid detergent to stand for 30 minutes at 25°C.

<Absorbance retention rate>
The liquid detergent meets the following requirements:
When the absorbance at the maximum absorption wavelength (W _M ) of the liquid cleaner is 0.03 or more, the retention rate of absorbance calculated from the following formula (i) when a sunlight exposure test is conducted until the integrated exposure amount reaches 15 MJ/ ^m2 at a wavelength of 300 to 400 nm is 50% or more.
In the sunlight exposure test, the liquid cleaner filled in a container described below is irradiated with sunlight until the cumulative exposure amount reaches 15 MJ/ ^m2 at a wavelength of 300 to 400 nm.
Absorbance retention rate (%)=(absorbance of liquid cleaner after sunlight exposure test at maximum absorption wavelength (W _M )/absorbance of liquid cleaner before sunlight exposure test at maximum absorption wavelength (W _M ))×100 (i)
In addition, the "maximum absorption wavelength (W _M ) of the liquid detergent" in formula (i) means the maximum absorption wavelength in the wavelength range of 400 to 550 nm of the liquid detergent before the sunlight exposure test.

If the absorbance retention rate is equal to or higher than the lower limit, it means that the dye fading is suppressed even when the liquid detergent is exposed to sunlight. Therefore, even if the container is printed or labeled to match the color of the liquid detergent, the color and appearance of the printing or label can be well maintained. In addition, the visibility of the printing or label can be well maintained.
The retention rate of absorbance is 50% or more, preferably 60% or more, more preferably 65% or more, and may be 100%.
When the absorbance at the maximum absorption wavelength (W _M ) of the liquid detergent is 0.03 or more, the retention rate of absorbance shows a similar tendency whether the liquid detergent is produced immediately after production or after some time has elapsed.
The retention rate of absorbance can be adjusted by the combination of components (A), (B), (C) and (D) described below, and the type of component (A), etc.

<Composition>
The liquid detergent is a composition containing the following components (A), (B), (C), and (D), i.e., a liquid detergent composition.
The liquid detergent may contain water. If necessary, the liquid detergent may further contain components (optional components) other than the components (A), (B), (C), and (D) and water.

(Component (A))
The component (A) is a water-soluble dye preparation having an absorbance peak at 400 to 550 nm.
When the liquid detergent contains component (A), the liquid detergent has an absorbance peak at a wavelength of 400 to 550 nm and exhibits a color within the range of 5YR to 5Y on the Munsell color wheel.
In the present invention, the term "water-soluble colorant preparation" refers to a dye that is soluble in water and colors water. In addition, "soluble" refers to a dissolution of 0.01 g or more in 1000 mL of water at 25°C.
Dyes are broadly classified into water-soluble and oil-soluble. Because oil-soluble dyes are difficult to dissolve in water, their use tends to cause precipitation during the production of liquid detergents, making them difficult to handle.

A water-soluble dye preparation is a preparation containing a dye. The dye may be present in the preparation in a powder state, or in a solution dissolved in a solvent such as water or an organic solvent (hereinafter also referred to as a "dye solution"). That is, a water-soluble dye preparation may contain a solvent and the like in addition to the dye.
The water-soluble dye preparation may contain components other than the dye and the solvent (hereinafter also referred to as "other components") as necessary. Examples of the other components include preservatives, electrolytes, surfactants, dispersants, pH adjusters, pH buffers, etc.
When the dye is present in the preparation in the form of a powder, the content of the dye relative to the total mass of the water-soluble dye preparation is usually about 70 to 100% by mass.
When the dye is present in the formulation in the form of a dye solution, the content of the dye relative to the total mass of the dye solution is usually about 1 to 50% by mass.

Examples of component (A) include Yellow No. 407 (CI Number: C.I. 18820), Matsumin Neocolor Gold Yellow MFR, Nylosan Orange S-3R srg, Liquitint (registered trademark) BRILLIANT ORANGE, and Liquitint (registered trademark) RED ET. Of these, Liquitint (registered trademark) BRILLIANT ORANGE is preferred.
The component (A) may be used alone or in combination of two or more types.
In this specification, "C.I." is an abbreviation for Color Index.

The content of component (A) is preferably 0.0000001 to 0.06 mass%, more preferably 0.0000005 to 0.04 mass%, and even more preferably 0.000001 to 0.02 mass%, based on the total mass of the liquid detergent. When the content of component (A) is equal to or greater than the above lower limit, the liquid detergent can be sufficiently colored. When the content of component (A) is equal to or less than the above upper limit, dyeing of textile products during washing can be reduced.
When the dye is present in the formulation in the form of a powder, the content of the dye powder is preferably 0.0000001 to 0.03 mass %, more preferably 0.0000005 to 0.02 mass %, and even more preferably 0.000001 to 0.01 mass %, relative to the total mass of the liquid detergent.
When the water-soluble dye is present in the formulation in the form of a dye solution, the content of the dye solution is preferably 0.00001 to 0.06 mass %, more preferably 0.00005 to 0.04 mass %, and even more preferably 0.0001 to 0.02 mass %, relative to the total mass of the liquid detergent.

<Component (B)>
The component (B) is an antioxidant.
The (B) component can suppress the fading of the (A) component when exposed to sunlight. In addition, the (B) component turns yellow after the antioxidant reaction, so it has the effect of compensating for the yellowish color. Furthermore, by including the (B) component in the liquid detergent, the absorption of oxygen in the head space of the container containing the liquid detergent can be suppressed.

Examples of the component (B) include monophenol-based antioxidants such as dibutylhydroxytoluene and butylhydroxyanisole; bisphenol-based antioxidants such as 2,2'-methylenebis(4-methyl-6-t-butylphenol); polymeric phenol-based antioxidants such as dl-α-tocopherol; and vitamin C-based antioxidants such as L-ascorbic acid, sodium L-ascorbate, and calcium L-ascorbate. Of these, monophenol-based antioxidants and vitamin C-based antioxidants are preferred. Of the monophenol-based antioxidants, dibutylhydroxytoluene is more preferred. Of the vitamin C-based antioxidants, L-ascorbic acid is more preferred. From the viewpoints of enhancing the effect of inhibiting fading of the component (A) and inhibiting denting of the container during storage, dibutylhydroxytoluene is particularly preferred as the component (B).
The component (B) may be used alone or in combination of two or more.

The content of the (B) component is preferably 0.01 to 2% by mass, more preferably 0.01 to 1% by mass, even more preferably 0.01 to 0.5% by mass, particularly preferably 0.02 to 0.1% by mass, and most preferably 0.02 to 0.07% by mass, based on the total mass of the liquid detergent. If the content of the (B) component is equal to or greater than the lower limit, the fading of the (A) component can be suppressed. If the content of the (B) component is equal to or less than the upper limit, the (B) component is less likely to precipitate even when the liquid detergent is stored at a low temperature (e.g., -5°C or lower), and stability (hereinafter also referred to as "low temperature stability") can be well maintained. In addition, since the (B) component turns yellow moderately after the antioxidant reaction, the effect of compensating for the yellowness can be sufficiently obtained. Here, "turns yellow moderately" means that the color of the liquid detergent (e.g., yellow or orange) is not easily affected and the liquid detergent turns yellow to an extent that does not interfere with the visual impression of the liquid detergent.

<Component (C)>
Component (C) is an alkanolamine.
Component (C) plays the role of a neutralizing agent (pH adjuster). Component (C) is stably dissolved in the liquid detergent even at low temperatures and is not easily precipitated (i.e., has excellent low-temperature stability). Therefore, the liquid detergent can maintain a uniform appearance even when stored at low temperatures.
Sodium hydroxide is known as a component commonly used in liquid detergents as a pH adjuster. Although sodium hydroxide does not yellow easily, it tends to precipitate at low temperatures, and when the liquid detergent is stored at low temperatures, its low-temperature stability decreases.
Furthermore, component (C) yellows over time, and is particularly prone to yellowing in high temperature environments (e.g., 50° C. or higher), and appropriate yellowing of component (C) has the effect of compensating for the yellow tinge.

Alkanolamines are organic amines having one or more hydroxyalkyl groups in the molecule. The number of carbon atoms in the hydroxyalkyl group of the alkanolamine is preferably 1 to 10, and more preferably 2 to 6.
The alkanolamine may be a monoalkanolamine, a dialkanolamine, or a trialkanolamine.

Examples of the component (C) include monoalkanolamines such as monoethanolamine, monopropanolamine, monoisopropanolamine, and 2-amino-2-methyl-1-propanol; dialkanolamines such as diethanolamine, dipropanolamine, and diisopropanolamine; and trialkanolamines such as triethanolamine, tripropanolamine, and triisopropanolamine.
Of these, monoalkanolamines are preferred as component (C), and monoethanolamine is more preferred.
The component (C) may be used alone or in combination of two or more.

The content of component (C) is preferably 1 to 4.5% by mass, more preferably 1.5 to 4% by mass, and even more preferably 2 to 3% by mass, based on the total mass of the liquid detergent. If the content of component (C) is equal to or greater than the lower limit, the pH of the liquid detergent can be easily adjusted to the desired value. If the content of component (C) is equal to or less than the upper limit, low-temperature stability can be well maintained. In addition, component (C) yellows moderately, so the effect of compensating for the yellow tinge is sufficiently obtained.

<Component (D)>
The component (D) is a surfactant.
When the liquid detergent contains the component (D), the cleaning power is enhanced.

The component (D) may be a non-soap surfactant that can be used in conventionally known cleaning agents. Here, the term "non-soap surfactant" refers to a surfactant other than higher fatty acids or their salts (so-called soaps). The term "higher fatty acids" refers to saturated or unsaturated fatty acids having 8 to 24 carbon atoms.
Specific examples of the component (D) include non-soap anionic surfactants, nonionic surfactants, cationic surfactants, amphoteric surfactants, and semi-polar surfactants.
As the component (D), one type of surfactant may be used, or two or more types of surfactants may be used in combination.
From the viewpoint of further enhancing the cleaning power, the (D) component preferably contains a non-soap anionic surfactant (hereinafter also referred to as "component (D1)"), and more preferably contains component (D1) and a nonionic surfactant (hereinafter also referred to as "component (D2)").
As the component (D), the components (D1) and (D2) may be used in combination with a surfactant other than the components (D1) and (D2) (hereinafter also referred to as “component (D3)”).

(Component (D1))
The component (D1) is a non-soap anionic surfactant.
Examples of the component (D1) include carboxylic acid type anionic surfactants such as linear alkylbenzenesulfonic acid or a salt thereof (LAS), α-olefinsulfonic acid or a salt thereof (AOS), linear or branched alkyl sulfate or a salt thereof (AS), polyoxyalkylene alkyl ether sulfate or a salt thereof (AES), polyoxyalkylene alkenyl ether sulfate or a salt thereof, alkyl group-containing alkanesulfonic acid or a salt thereof, α-sulfofatty acid ester or a salt thereof (MES), internal olefinsulfonic acid or a salt thereof (IOS), hydroxyalkanesulfonic acid or a salt thereof, alkyl ether carboxylic acid or a salt thereof, polyoxyalkylene ether carboxylic acid or a salt thereof, alkylamide ether carboxylic acid or a salt thereof, alkenylamide ether carboxylic acid or a salt thereof, and acylaminocarboxylic acid or a salt thereof; and phosphate type anionic surfactants such as alkyl phosphate ester or a salt thereof, polyoxyalkylene alkyl phosphate ester or a salt thereof, polyoxyalkylene alkylphenyl phosphate ester or a salt thereof, and glycerin fatty acid ester monophosphate ester or a salt thereof.
Examples of the salt form of the non-soap anionic surfactant include alkali metal salts (sodium salt, potassium salt, etc.), alkaline earth metal salts (magnesium salt, etc.), and alkanolamine salts (monoethanolamine salt, diethanolamine salt, etc.).
The component (D1) may be used alone or in combination of two or more types.
As the component (D1), LAS, AOS, AS, AES, and IOS are preferred, and LAS, AES, and IOS are more preferred. From the viewpoint of enhancing the defoaming property, the liquid detergent preferably contains at least LAS, and from the viewpoint of further enhancing the cleaning power, it is more preferred to contain both LAS and AES.
In the present invention, at least one of linear alkylbenzenesulfonic acid and a salt thereof is also referred to as "component (D1-1)". Furthermore, at least one of polyoxyalkylene alkyl ether sulfate and a salt thereof is also referred to as "component (D1-2)".
In addition, in this specification, "antifoaming property" refers to the property of suppressing foaming when a liquid detergent is used for washing, specifically when the liquid detergent is diluted with tap water or the like and used.

The color value of the component (D1-1) is preferably 150 or less, more preferably 110 or less, and even more preferably 50 or less. The higher the color value, the more likely it is to have a brownish color. When the color value is equal to or less than the above upper limit, it can be colored, for example, in a vivid yellow or orange color.
There is no particular lower limit for the color tone value of the component (D1-1).
The color value is a numerical value obtained by measuring the absorbance of an aqueous solution containing 10% by mass of the component (D1-1) as an active ingredient (hereinafter also referred to as an "LAS aqueous solution") using a UV-Vis spectrophotometer and multiplying the absorbance value at a wavelength of 420 nm by 1000 (absorbance at a wavelength of 420 nm x 1000).

Examples of the component (D1-2) include a compound represented by the following general formula (1) (hereinafter also referred to as "compound (1)").
R ¹ -O-[(EO) _v /(PO) _w ]-SO ₃ M ... (1)
(In general formula (1), ^R1 is an alkyl group having 8 to 20 carbon atoms or an alkenyl group having 8 to 20 carbon atoms, EO is an oxyethylene group, PO is an oxypropylene group, v is a number of 0 or more representing the average number of repetitions of EO, w is a number of 0 to 6 representing the average number of repetitions of PO, and M is a counter ion.)

R ¹ may be linear or branched. R ¹ is preferably a linear or branched alkyl group having 10 to 20 carbon atoms, more preferably a linear or branched alkyl group having 12 to 14 carbon atoms.
The proportion (content) of the compound in formula (1) where v=0 and w=0 is preferably 35 to 55 mass % relative to the total mass of the component (D1-2).
v is preferably 0 to 5, more preferably 0.1 to 3, further preferably 0.5 to 3, and particularly preferably 0.5 to 2.5.
w is preferably an integer of 0 to 3, and more preferably 0.
v+w is preferably a number greater than 0, and more preferably 1 to 5.
When v and w are not 0, that is, when compound (1) has both EO and PO, EO and PO may be added in a block form or may be added randomly. Examples of a method for adding EO and PO in a block form include a method for introducing ethylene oxide and then propylene oxide, and a method for introducing propylene oxide and then ethylene oxide. The molar distribution of ethylene oxide and propylene oxide added is not particularly limited.
Examples of M include a hydrogen atom, an alkali metal ion such as sodium or potassium, an alkaline earth metal ion such as magnesium, or an alkanolamine such as monoethanolamine or diethanolamine. When M is a counter ion having a valence of 2 or more, M is bonded to _-SO3 at a number obtained by multiplying M by 1/valence. For example, when M is a magnesium ion, the number of M is 1/2.

(Component (D2))
The component (D2) is a nonionic surfactant.
Examples of component (D2) include polyoxyalkylene-type nonionic surfactants, alkylphenols, alkylene oxide adducts of fatty acids having 8 to 22 carbon atoms or amines having 8 to 22 carbon atoms, polyoxyethylene polyoxypropylene block copolymers, fatty acid alkanolamides, polyhydric alcohol fatty acid esters or alkylene oxide adducts thereof, alkylene oxide adducts of hydrogenated castor oil, sugar fatty acid esters, N-alkyl polyhydroxy fatty acid amides, and alkyl glycosides.
The component (D2) may be used alone or in combination of two or more types.

As the component (D2), a polyoxyalkylene type nonionic surfactant is preferred, and among them, a compound represented by the following general formula (2) (hereinafter also referred to as "compound (2)") and a compound represented by the following general formula (3) (hereinafter also referred to as "compound (3)") are more preferred, with compound (2) being even more preferred.

R ² -O-[(EO) _p1 /(A ¹ O) _q1 ]-(EO) _r1 -R ³ ... (2)
(In general formula (2), ^R2 is a hydrocarbon group having 7 to 22 carbon atoms, ^R3 is a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, or an alkenyl group having 2 to 6 carbon atoms, EO is an oxyethylene group, p1 is a number from 3 to 25 indicating the average number of EO repetitions, ^A1O represents at least one of PO (oxypropylene group) and BO (oxybutylene group), q1 is a number from 0 to 20 indicating the average number of ^A1O repetitions, and r1 is a number from 0 to 20 indicating the average number of EO repetitions.)

The number of carbon atoms in the hydrocarbon group of ^R2 is 7 to 22, preferably 10 to 22, more preferably 10 to 20, still more preferably 10 to 18, and particularly preferably 12 to 18. ^R2 may be linear or branched. Specifically, ^R2 may be a linear hydrocarbon group, or may be a group selected from a branched primary hydrocarbon group and a linear secondary hydrocarbon group.
^R3 is preferably a hydrogen atom or an alkyl group having 1 to 3 carbon atoms, and more preferably a hydrogen atom.
When ^R2 is a linear hydrocarbon group, p1+r1 is preferably 3 to 30, more preferably 5 to 18, further preferably 6 to 18, and particularly preferably 10 to 18. q1 is preferably a number of 0 to 6, and more preferably 0 to 3.
When ^R2 is a group selected from a branched primary hydrocarbon group and a linear secondary hydrocarbon group, p1+r1 is preferably 3 to 10, and w is preferably 0.
When r1 is 0, p1 is preferably an integer of 4 to 20, more preferably an integer of 5 to 16, and even more preferably an integer of 6 to 10. q1 is preferably an integer of 0 to 4, more preferably an integer of 0 to 2, and even more preferably an integer of 0.
When r1 is 1 or more, p1 is preferably 4 to 16, more preferably 6 to 12, and still more preferably 8 to 10. q1 is preferably 1 to 4, and more preferably 2 to 3. r1 is preferably 4 to 16, more preferably 6 to 12, and still more preferably 8 to 10.
When q1 is 1 or more, in [(EO) _p1 /(A ¹ O) _q1 ], the distribution (arrangement order) of EO and PO, EO and BO, or EO, PO and BO is not particularly limited, and these may be arranged in a block form or randomly.
The average number of repetitions can be measured by gas chromatography or the like.

R ⁴ -X-[(EO) _p2 /(A ² O) _q2 ]-(EO) _r2 -R ⁵ ... (3)
(In general formula (3), R ⁴ is a hydrocarbon group having 7 to 22 carbon atoms, -X- is -COO- or -CONH-, R ⁵ is a hydrogen atom, an alkyl group having 1 to 6 carbon atoms or an alkenyl group having 2 to 6 carbon atoms, EO is an oxyethylene group, p2 is a number from 3 to 25 indicating the average number of EO repetitions, A ² represents at least one of PO (oxypropylene group) and BO (oxybutylene group), q2 is a number from 0 to 6 indicating the average number of A ² O repetitions, and r2 is a number from 0 to 20 indicating the average number of EO repetitions.)

The number of carbon atoms in the hydrocarbon group of ^R4 is 7 to 22, preferably 9 to 19, and more preferably 11 to 17. ^R4 may be linear or branched. Specifically, ^R4 may be a linear hydrocarbon group, or may be a group selected from a branched primary hydrocarbon group and a linear secondary hydrocarbon group.
As —X—, —COO— is preferable.
^R5 is preferably a hydrogen atom or an alkyl group having 1 to 3 carbon atoms, and more preferably an alkyl group having 1 to 2 carbon atoms.
When r2 is 0, p2 is preferably 6 to 22, more preferably 9 to 20, and still more preferably 12 to 18. q2 is preferably 0 to 4, more preferably 0 to 2, and still more preferably 0.
When r2 is 1 or more, p2 is preferably 4 to 16, more preferably 6 to 12, and still more preferably 8 to 10. q2 is preferably 1 to 4, and more preferably 2 to 3. r2 is preferably 4 to 16, more preferably 6 to 12, and still more preferably 8 to 10.
When q2 is 1 or more, the distribution (arrangement order) of EO and PO, EO and BO, or EO, PO and BO in [(EO) _p2 /(A ² O) _q2 ] is not particularly limited, and these may be arranged in a block form or randomly.

As compound (3), polyoxyethylene fatty acid alkyl esters are preferred, and in particular, a compound in which R ⁴ in the formula (3) is an alkyl group having 11 carbon atoms and an alkyl group having 13 carbon atoms, -X- is -COO-, R ⁵ is a methyl group, p2=15, q2=0, and r2=0 (hereinafter sometimes referred to as MEE) is more preferred.
Polyoxyethylene fatty acid alkyl esters, especially MEE, are nonionic surfactants with weak molecular orientation in aqueous solution and unstable micelles. For this reason, polyoxyethylene fatty acid alkyl esters do not cause gelation at high concentrations, and even if a large amount of one type is mixed into a liquid detergent, it is assumed that the solubility in water can be increased. Therefore, it is considered that when a liquid detergent containing polyoxyethylene fatty acid alkyl esters contacts water, it is quickly dispersed and becomes a cleaning solution. In addition, the concentration of polyoxyethylene fatty acid alkyl esters in the cleaning solution quickly becomes uniform, and a cleaning solution of appropriate concentration can be contacted with the washed item (textile product) from the beginning of cleaning, and as a result, it is considered that high cleaning power can be exhibited.

(Component (D3))
The component (D3) is a surfactant other than the components (D1) and (D2), and specific examples thereof include cationic surfactants, amphoteric surfactants, and semi-polar surfactants.
The component (D3) may be used alone or in combination of two or more types.

Examples of cationic surfactants include long-chain aliphatic amidoalkyl tertiary amines or salts thereof, such as caprylic acid dimethylaminopropylamide, capric acid dimethylaminopropylamide, lauric acid dimethylaminopropylamide, myristic acid dimethylaminopropylamide, palmitic acid dimethylaminopropylamide, stearic acid dimethylaminopropylamide, behenic acid dimethylaminopropylamide, and oleic acid dimethylaminopropylamide; aliphatic ester alkyl tertiary amines or salts thereof, such as palmitate ester propyl dimethylamine and stearate ester propyl dimethylamine; palmitic acid diethanolaminopropylamide, stearic acid diethanolaminopropylamide; tetramethylammonium salts, tetraethylammonium salts, and the like. short-chain tetramethylammonium salts (alkyl having 1 to 4 carbon atoms) such as tetrapropylammonium salt, tetrabutylammonium salt, etc.; octyltrimethylammonium salt, decyltrimethylammonium salt, dodecyltrimethylammonium salt, tetradecyltrimethylammonium salt, lauryltrimethylammonium salt, cetyltrimethylammonium salt, palmityltrimethylammonium salt, stearyltrimethylammonium salt, octyldimethylethylammonium salt, decyldimethylethylammonium salt, dodecyldimethylethylammonium salt, tetradecyldimethylethylammonium salt, lauryldimethylethylammonium salt, cetyldimethylethylammonium salt, stearyldimethylethylammonium salt, octyldiethylmethylammonium salt, long chain (alkyl having 8 to 18 carbon atoms) trishort chain (alkyl having 1 or 2 carbon atoms) ammonium salts such as ammonium salts, decyl diethylmethyl ammonium salts, dodecyl diethylmethyl ammonium salts, tetradecyl diethylmethyl ammonium salts, cetyl diethylmethyl ammonium salts, and stearyl diethylmethyl ammonium salts; dioctyl dimethyl ammonium salts, didecyl dimethyl ammonium salts, N,N-didecyl-N-methyl-poly(oxyethyl) ammonium salts, didodecyl dimethyl ammonium salts, ditetradecyl dimethyl ammonium salts, dicetyl dimethyl ammonium salts, distearyl dimethyl ammonium salts, dioctyl methyl ethyl ammonium salts, didecyl methyl ethyl ammonium salts, didodecyl methyl ethyl ammonium salts, ditetradecyl dimethyl ammonium salts, Examples of such ammonium salts include di-long chain (alkyl having 8 to 18 carbon atoms), di-short chain (alkyl having 1 or 2 carbon atoms) ammonium salts such as dimethyl ethyl ammonium salt, dicetyl methyl ethyl ammonium salt, and distearyl methyl ethyl ammonium salt; long chain (alkyl having 8 to 18 carbon atoms), di-short chain (alkyl having 1 or 2 carbon atoms), hydroxyalkyl (1 or 2 carbon atoms) ammonium salts such as stearyl dimethyl hydroxyethyl ammonium; di-short chain (alkyl having 1 or 2 carbon atoms), long chain (alkyl having 8 to 18 carbon atoms) ammonium salts having trialkoxysilylalkyl groups (having 4 to 10 carbon atoms), such as [3(trimethoxysilyl)]propyl(dimethyl)octadecyl ammonium salt; amine nitrates; benzyl trimethyl ammonium salts; benzalkonium salts; and benzethonium salts.
Examples of the salt form of the cationic surfactant include alkali metal salts (sodium salt, potassium salt, etc.), alkaline earth metal salts (magnesium salt, etc.), and alkanolamine salts (monoethanolamine salt, diethanolamine salt, etc.).
The cationic surfactant may be used alone or in combination of two or more kinds.

Examples of amphoteric surfactants include alkyl betaine type, alkyl amide betaine type, imidazoline type, alkyl amino sulfone type, alkyl amino carboxylic acid type, alkyl amide carboxylic acid type, amide amino acid type, and phosphoric acid type amphoteric surfactants.
The amphoteric surfactant may be used alone or in combination of two or more kinds.

Examples of semi-polar surfactants include alkylamine oxides and alkylamidopropyldimethylamine oxides.
The semi-polar surfactant may be used alone or in combination of two or more kinds.

(Content/mass ratio)
The content of component (D), i.e., the sum of the contents of components (D1), (D2) and (D3) (hereinafter also referred to as the "total surfactant amount"), is preferably 35% by mass or more, more preferably 35 to 70% by mass, even more preferably 35 to 65% by mass, and particularly preferably 40 to 60% by mass, based on the total mass of the liquid detergent. If the content of component (D) is equal to or greater than the above lower limit, the detergency is further enhanced. If the content of component (D) is equal to or less than the above upper limit, the liquid detergent is less likely to gel and the fluidity can be better maintained.

The content of component (D1) is preferably 6 to 23% by mass, more preferably 8 to 20% by mass, and even more preferably 11 to 18% by mass, based on the total mass of the liquid detergent. If the content of component (D1) is equal to or greater than the lower limit, the cleaning power and low-temperature stability are improved. If the content of component (D1) is equal to or less than the upper limit, the liquid detergent has excellent fluidity, and the dye fading is inhibited, the liquid appearance is aesthetic, and the enzyme stability is improved.

The content of the component (D1-1) is preferably from 5 to 20 mass %, more preferably from 6 to 18 mass %, and even more preferably from 8 to 15 mass %, based on the total mass of the liquid detergent.
The mass ratio of the (D1-1) component to the (D) component (hereinafter also referred to as the "D1-1/D ratio") is preferably from 0.16 to 0.36, more preferably from 0.16 to 0.30, even more preferably from 0.17 to 0.28, and particularly preferably from 0.18 to 0.26.
When the content of the (D1-1) component is equal to or greater than the lower limit, or when the D1-1/D ratio is equal to or greater than the lower limit, the cleaning power is further enhanced and a uniform appearance can be well maintained.
The (D1-1) component may be yellow or brown. In particular, the higher the color value, the more likely the liquid cleaner is to be brownish. Therefore, the more the content of the (D1-1) component, the more likely the liquid cleaner is to turn yellow or brown immediately after production. In addition, the (D1-1) component may contain a reducing agent mixed in during the production process, and this reducing agent may cause the (A) component to fade. Furthermore, since the (D1-1) component is acidic, the more the content of the (D1-1) component in the liquid cleaner, the more the content of the (C) component will be neutralized. However, since the (C) component is a component that is prone to yellowing over time, the liquid cleaner usually tends to turn excessively yellow over time as the content of the (C) component increases.
When the content of the (D1-1) component is equal to or less than the upper limit, or when the D1-1/D ratio is equal to or less than the upper limit, the content of the (D1-1) component is sufficiently reduced and there is no need to increase the content of the (C) component more than necessary. This makes it possible to further suppress excessive yellowing and pigment fading of the liquid detergent.

The content of component (D2) is preferably 10 to 40% by mass, more preferably 15 to 38% by mass, and even more preferably 20 to 36% by mass, based on the total mass of the liquid detergent. If the content of component (D2) is equal to or greater than the lower limit, the cleaning power is further increased. If the content of component (D2) is equal to or less than the upper limit, the low-temperature stability is improved.

The mass ratio of the (D2) component to the (D1) component (hereinafter also referred to as the "D2/D1 ratio") is preferably 1.8 to 3, more preferably 2 to 2.8, and even more preferably 2.2 to 2.7. If the D2/D1 ratio is within the above range, a uniform appearance can be maintained. In particular, if the D2/D1 ratio is equal to or greater than the above lower limit, the cleaning power is further increased. In addition, since the content of the (D1-1) component is sufficiently reduced and there is no need to increase the content of the (C) component more than necessary, excessive yellowing and pigment fading of the liquid detergent can be further suppressed.

<Water>
As the water, purified water, ion-exchanged water, distilled water, tap water, etc. can be used.
The water may be used alone or in combination of two or more kinds.
The water also includes water derived from component (A), that is, water contained in a water-soluble colorant preparation.

The water content is preferably 5 to 60% by mass, more preferably 10 to 50% by mass, and more preferably 15 to 40% by mass, based on the total mass of the liquid detergent. If the water content is equal to or greater than the lower limit, the liquid detergent can maintain a suitable viscosity. If the water content is equal to or less than the upper limit, the liquid detergent is less likely to gel and can maintain good fluidity.

<Optional ingredients>
Examples of optional components include water-miscible organic solvents, higher fatty acids or salts thereof, pH adjusters other than component (C), viscosity reducers and solubilizers, antibacterial agents, alkaline agents other than component (C), chelating agents, enzymes, structuring agents, thickening agents other than structuring agents, preservatives, inorganic reducing agents, enzyme stabilizers, texture improvers, dye transfer inhibitors, dispersants, redeposition inhibitors other than dispersants, colorants other than component (A), fragrances, emulsifying agents, fluorescent agents, cationic polymers, discoloration inhibitors, hydrotropes, bleaching agents, pearling agents, and extracts of natural products and the like.
The optional components may be used alone or in combination of two or more.

The water-miscible organic solvent refers to an organic solvent that dissolves at least 25 g in 1 L of water at 25°C.
Examples of the water-miscible organic solvent include alcohols such as ethanol, glycerin, 1-propanol, 2-propanol, 1-butanol, and 3-methoxy-3-methyl-1-butanol (Solfit, product name); glycols such as propylene glycol (PG), butylene glycol, and hexylene glycol; polyglycols such as diethylene glycol, triethylene glycol, tetraethylene glycol, polyethylene glycol having a molecular weight of about 200 to 1000, and dipropylene glycol; and alkyl ethers such as diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, diethylene glycol monobutyl ether (butyl carbitol), and diethylene glycol dimethyl ether. Among these, from the viewpoints of low odor, ease of availability, and fluidity of the liquid detergent, ethanol, glycerin, 3-methoxy-3-methyl-1-butanol, propylene glycol, polyethylene glycol having a molecular weight of about 200 to 1000, and diethylene glycol monobutyl ether (butyl carbitol) are preferred, and ethanol, 3-methoxy-3-methyl-1-butanol, and polyethylene glycol having a molecular weight of about 200 to 1000 are more preferred. From the viewpoints of suppressing precipitation of component (B) when the liquid detergent is stored at low temperature, maintaining a uniform appearance, and cold water solubility, 3-methoxy-3-methyl-1-butanol and polyethylene glycol having a molecular weight of about 200 to 1000 are preferred as water-miscible organic solvents.
The water-miscible organic solvent may be used alone or in combination of two or more kinds.
The content of the water-miscible organic solvent is preferably from 1 to 30% by mass, more preferably from 3 to 20% by mass, and even more preferably from 5 to 15% by mass, based on the total mass of the liquid detergent.

If the liquid detergent contains a higher fatty acid or a salt thereof, the defoaming properties are enhanced.
Examples of higher fatty acids or salts thereof include single fatty acids or salts thereof, such as caprylic acid, capric acid, lauric acid, myristic acid, palmitic acid, stearic acid, isostearic acid, hydroxystearic acid, oleic acid, and behenic acid; mixed fatty acids or salts thereof, such as coconut fatty acid and beef tallow fatty acid; and the like.
As the higher fatty acid, lauric acid, myristic acid, palmitic acid, and coconut fatty acid are preferred, and coconut fatty acid is more preferred.
Examples of salt forms of higher fatty acids include alkali metal salts (sodium salt, potassium salt, etc.), alkaline earth metal salts (magnesium salt, calcium salt, etc.), ammonium salts, and alkanolamine salts (monoethanolamine salt, diethanolamine salt, etc.).
The higher fatty acid or the salt thereof may be used alone or in combination of two or more kinds.
The content of the higher fatty acid or its salt is preferably 0.5 to 10 mass %, more preferably 1 to 8 mass %, and even more preferably 1.5 to 5 mass %, based on the total mass of the liquid detergent. If the content of the higher fatty acid or its salt is equal to or more than the above lower limit, the defoaming property is improved. If the content of the higher fatty acid or its salt is equal to or less than the above upper limit, the low temperature stability is improved.

Examples of pH adjusters other than component (C) (hereinafter also referred to as "other pH adjusters") include alkali metal hydroxides such as sodium hydroxide and potassium hydroxide, basic amino acids such as arginine and lysine, ammonia, alkali metal carbonates such as sodium carbonate and potassium carbonate, and acid agents such as sulfuric acid, hydrochloric acid, and phosphoric acid. Among these, sodium hydroxide and potassium hydroxide are preferred.
The other pH adjusters may be used alone or in combination of two or more.
The amount of the other pH adjuster added may be appropriately set so as to adjust the liquid detergent to a desired pH.
Since the liquid detergent contains the component (C), it does not need to contain other pH adjusters. From the viewpoint of improving low-temperature stability, it is preferable that the liquid detergent is substantially free of other pH adjusters, in particular, of alkali metal hydroxides.
In this specification, the term "substantially free" means that, except for those that are unintentionally contained, other pH adjusters are not actively blended.

Examples of the viscosity reducing agent and solubilizing agent include aromatic sulfonic acid or a salt thereof. Specific examples include p-toluenesulfonic acid, xylenesulfonic acid, cumenesulfonic acid, substituted or unsubstituted naphthalenesulfonic acid, or a salt thereof. Examples of the salt of aromatic sulfonic acid include sodium salt, potassium salt, calcium salt, magnesium salt, ammonium salt, and alkanolamine salt.
The viscosity reducing agent and the solubilizing agent may be used alone or in combination of two or more kinds.
The content of the viscosity reducer and solubilizer is preferably 0.1 to 10% by mass based on the total mass of the liquid detergent.

Examples of antibacterial agents include diclosan, triclosan, isopropylmethylphenol, polylysine, polyhexamethylene biguanide, etc. Among these, antibacterial agents having a diphenyl structure are preferred, and diclosan and triclosan are more preferred.
The antibacterial agent may be used alone or in combination of two or more kinds.
The content of the antibacterial agent is preferably 0.001 to 10 mass %, more preferably 0.01 to 5 mass %, and even more preferably 0.03 to 1 mass %, based on the total mass of the liquid detergent.

Examples of alkaline agents other than the component (C) (hereinafter also referred to as "other alkaline agents") include inorganic alkaline agents.
The inorganic alkaline agent is a component that dissolves in whole or in part in water to exhibit basicity, and the pH of a 1% by mass aqueous solution at 25° C. is 8 or higher.
Specific examples of inorganic alkaline agents include carbonates such as sodium carbonate, sodium bicarbonate, double salts of sodium carbonate and sodium bicarbonate (sodium sesquicarbonate), potassium carbonate, potassium bicarbonate, etc.; and silicates such as sodium metasilicate, layered sodium silicate, etc. Among these, sodium carbonate, potassium carbonate, sodium metasilicate, and layered sodium silicate are preferred from the viewpoint of further enhancing the detergency.
The inorganic alkaline agent may be used alone or in combination of two or more kinds.
The inorganic alkaline agent may be used as a pH adjuster.
The content of the inorganic alkaline agent is preferably 20% by mass or less, and more preferably 0.5 to 10% by mass, based on the total mass of the liquid detergent.

The chelating agent is preferably, for example, a chelating agent having a trivalent or tetravalent carboxylic acid group or a salt thereof. Specific examples include citric acid or a salt thereof, and an aminocarboxylic acid-based chelating agent or a salt thereof. An aminocarboxylic acid refers to a compound containing at least one primary, secondary or tertiary amino group and at least one carboxyl group in one molecule, and an aminocarboxylic acid-based chelating agent refers to a chelating agent that is an aminocarboxylic acid.
The aminocarboxylic acid chelating agent may be any known one in the field of cleaning agents. Specific examples include methylglycine diacetate (MGDA), methylglycine diacetate, L-glutamic acid diacetate (GLDA), L-glutamic acid diacetate, diethylenetriamine pentaacetic acid (DTPA), diethylenetriamine pentaacetate, ethylenediamine succinic acid (EDDS), ethylenediamine succinate, 3-hydroxy-2,2'-iminodisuccinic acid (HIDS), 3-hydroxy-2,2'-iminodisuccinic acid, L-aspartic acid-N,N-diacetic acid (ASDA), and L-aspartic acid-N,N-diacetate. Among these, citric acid or a salt thereof, and MGDA or a salt thereof are preferred, and trisodium methylglycine diacetate is more preferred.
The chelating agent may be used alone or in combination of two or more kinds.
The content of the chelating agent is preferably 0.01% by mass or more, more preferably 0.05% by mass or more, and even more preferably 0.1% by mass or more, based on the total mass of the liquid detergent. If the content of the chelating agent is equal to or more than the lower limit, the low temperature stability is further improved and excessive yellowing of the liquid detergent can be further suppressed.

If a liquid cleaner contains enzymes, it has better cleaning power against sebum, protein and food stains.
Here, enzyme refers to an enzyme preparation.
As the enzyme, a liquid enzyme preparation or a solid (granular) enzyme preparation may be used. When a solid enzyme preparation is used, it is preferable that a part or the whole of the enzyme preparation is present in the liquid detergent in a solid state from the viewpoint of the stability of the enzyme.

Examples of the enzyme include protease, amylase, lipase, cellulase, and mannanase.
The protease is preferably a protease having serine, histidine, and aspartic acid in the molecule, such as a serine protease. Specifically, the protease preparations available from Novozymes are under the trade names of Savinase 16L, Savinase Ultra 16L, Savinase Ultra 16XL, Savinase Evity 16L, Everlase 16L TypeEX, Everlase Ultra 16L, Esperase 8L, Alcalase 2.5L, Alcalase Ultra 2.5L, Liquanase 2.5L, Liquanase Ultra 2.5L, Liquanase Ultra 2.5XL, Coronase 48L, and Progress Uno. Examples of suitable activators include those available from Genencor under the trade names Purafect L, Purafect OX, and Properase L, and those available from DuPont under the trade names EFFECTENZ P150, EFFECTENZ P100, and PREFERENZ P100.

Examples of amylase include amylase preparations available from Novozymes under the trade names Termamyl 300L, Termamyl Ultra 300L, Duramyl 300L, Stainzyme 12L, Stainzyme Plus 12L, Amplify 12L, Amplify Prime 100L, and Stainzyme Plus 12T; available from Genencor under the trade name Maxamyl; available from DuPont under the trade name EFFECTENZ S100; available from Amano Enzyme Co., Ltd. under the trade name Pullulanase Amano; and available from Seikagaku Corporation under the trade name DB-250.
Examples of lipase include lipase preparations available from Novozymes under the trade names Lipex 100L, Lipolase 100L, Lipex 100T, and the like.
Examples of cellulases include cellulase preparations available from Novozymes under the trade names Endolase 5000L, Celluzyme 0.4L, Carezyme 4500L, and Celluclean 4500T; and cellulase preparations available from DuPont under the trade name REVITALENTZ 2000.
Examples of mannanase include mannanase preparations available from Novozymes under the trade names Mannaway 4L and Mannaway 4.0T.
Examples of multi-enzymes that contain two or more types of enzymes include Medley Core 210L, Medley Core 200L, Medley Boost 300L, Medley Advance 200T, Medley Glow 200L, Medley Brilliant 100L, Medley Essential 150L, Medley Core 200T, Medley CleanR, Medley Essential 200T, Medley SmartR, Medley Boost 200L, Medley Boost 200T, Medley Examples include SuperioR 100T.
The enzymes may be used alone or in combination of two or more.

The enzyme preferably contains a protease, which enhances the cleaning power against protein stains.
Among the above, the trade names of the proteases are preferably Savinase 16L, Savinase Ultra 16L, Savinase Ultra 16XL, Everlase 16L, Everlase Ultra 16L, Alcalase 2.5L, Alcalase Ultra 2.5L, Liquanase 2.5L, Liquanase Ultra 2.5L, Liquanase Ultra 2.5XL, Coronase 48L, and Progress Uno 100L, and more preferably Alcalase 2.5L, Everlase 16L, Savinase 16L, and Coronase 48L, Progress Uno 100L are more preferred.
As the multi-enzyme containing protease, among the above, the product names Medley Core 210L, Medley Core 200L, Medley Boost 300L, Medley Advance 200T, Medley Brilliant 100L, Medley Essential 150L, Medley Core 200T, Medley CleanR, Medley Essential 200T, Medley SmartR, Medley Boost 200L, Medley Boost 200T, and Medley SuperioR 100T are preferable, and Medley More preferred are Core 210L and Medley Core 200L.

The enzyme content is preferably 0.01 to 3 mass % relative to the total mass of the liquid detergent, more preferably 0.05 to 2.5 mass %, and even more preferably 0.1 to 2 mass %. If the enzyme content is equal to or greater than the lower limit, the cleaning power is further increased. If the enzyme content is equal to or less than the upper limit, the precipitation of the enzyme is suppressed, and a uniform appearance can be maintained.

The structuring agent in the liquid detergent structure the liquid detergent, and therefore when the liquid detergent contains insoluble particles, the structuring agent enhances the dispersion stability of the insoluble particles, making it possible to uniformly disperse the insoluble particles in the liquid detergent and to maintain the dispersion state well.
In this specification, the term "structuring" refers to a state in which the viscosity changes before and after the application of force.

Examples of structuring agents include bacterial cellulose, non-bacterial cellulose, triglyceride components, etc. Among these, bacterial cellulose and non-bacterial cellulose are preferred, and bacterial cellulose is more preferred, since they can sufficiently enhance the dispersion stability of insoluble particles even in small amounts and can easily produce a highly transparent liquid appearance.
The structuring agent may be used alone or in combination of two or more.

Bacterial cellulose is cellulose produced by fermentation of bacteria of the genus Acetobacter.
Examples of bacterial cellulose include so-called mesh-like bacterial cellulose, in which water-insoluble fibers are branched in a mesh-like manner and interdigitate with each other to form a network.
At least a portion of the bacterial cellulose may be coated with or mixed with a thickening agent.
As the bacterial cellulose, commercially available products can be used, for example, the trade name "CELLULON (registered trademark)" manufactured by CPKelco U.S., Inc.

Non-bacterial cellulose is cellulose obtained from vegetables, fruits, and wood, and is also called cellulose fiber.
As the non-bacterial cellulose, commercially available products can be used, such as "Avicel (registered trademark)" manufactured by FMC Corporation, "Citri-Fi" manufactured by Fiberstar, and "Betafib" manufactured by Cosun.

Triglyceride components include, for example, hydrogenated castor oil and hydrogenated palm oil.
Hydrogenated castor oil can include glycerides, particularly triglycerides, that contain an alkyl or alkenyl moiety having 10 to 22 carbon atoms incorporating a hydroxyl group, such as trihydroxystearin, dihydroxystearin, and the like.
Hydrogenated castor oil is obtained by hydrogenating castor oil to convert double bonds that may be present in the starting oil as ricinoleyl moieties, which are converted to saturated hydroxyalkyl moieties, such as hydroxystearyl.
The hydrogenated castor oil may be processed in any suitable starting form, including but not limited to, being used in a solid state, a melt, or a mixture thereof.
As the hydrogenated castor oil, commercially available products can be used, such as "THIXCIN (registered trademark)" manufactured by Rheox, Inc. and "Custerwax A Flake" manufactured by NOF Corporation.
As the hardened palm oil, commercially available products can be used, for example, the product name "Extremely Hardened Palm Oil A" manufactured by New Japan Chemical Co., Ltd.

The content of the structuring agent is preferably 0.02 to 2 mass %, more preferably 0.04 to 1.5 mass %, and even more preferably 0.05 to 1 mass %, based on the total mass of the liquid detergent.
When the content of the structuring agent is equal to or greater than the lower limit, the dispersion stability of the insoluble particles is improved. When the content of the structuring agent is equal to or less than the upper limit, the viscosity of the liquid detergent is lowered, and the ease of use and liquid stability are improved.

Examples of thickeners other than structuring agents (hereinafter also referred to as "other thickeners") include acrylic polymers, xanthan gum, and carrageenan.
Commercially available acrylic polymers include, for example, the Carbopol (registered trademark) series manufactured by Lubrizol Corp. Examples of the Carbopol series include Carbopol ETD 2623, Carbopol EZ3, Carbopol EZ4, Carbopol Ultrez 20, Carbopol Ultrez 21, and Carbopol Aqua 30.
The other thickeners may be used alone or in combination of two or more.
The content of the other thickener is preferably 6 mass % or less, more preferably 0.2 to 4 mass %, based on the total mass of the liquid detergent.

Examples of preservatives include 2-bromo-2-nitropropane-1,3-diol, 3-iodopropynyl butylcarbamate, zinc pyrithione, sodium pyrithione, octylisothiazolin-3-one, 1,2-benzisothiazolin-3-one (BIT), 5-chloro-2-methylisothiazolin-3-one (CMIT), 2-methylisothiazolin-3-one (MIT), ethoxylated cocoamine, octanediol, benzyl alcohol, phenoxyethanol, and sodium benzoate.
The preservatives may be used alone or in combination of two or more.
The content of the preservative is preferably 0.001 to 2% by mass based on the total mass of the liquid detergent.

If the liquid detergent contains an inorganic reducing agent, fading and discoloration caused by light and heat can be further suppressed.
Examples of the inorganic reducing agent include sulfite; sulfurous acids such as sodium sulfite, potassium sulfite, calcium sulfite, magnesium sulfite, barium sulfite, and ammonium sulfite; hydrogen sulfite; hydrogen sulfite salts such as sodium hydrogen sulfite, potassium hydrogen sulfite, calcium hydrogen sulfite, magnesium hydrogen sulfite, and ammonium hydrogen sulfite; and pyrosulfite salts such as sodium pyrosulfite and potassium pyrosulfite.
The inorganic reducing agent may be used alone or in combination of two or more kinds.
From the viewpoint of further suppressing fading of component (A), the content of the inorganic reducing agent is preferably 0.05 mass% or less, and more preferably 0.03 mass% or less, relative to the total mass of the liquid cleaning agent, and it is even more preferable that the liquid cleaning agent is substantially free of inorganic reducing agent.

Examples of the enzyme stabilizer include boric acid, borax, formic acid or a salt thereof, lactic acid or a salt thereof, calcium chloride, calcium sulfate, and other calcium salts.
The other enzyme stabilizers may be used alone or in combination of two or more.
The content of the other enzyme stabilizer is preferably 2 mass % or less, more preferably 0.01 to 1 mass %, based on the total mass of the liquid detergent.

Examples of the feel improver include silicones such as dimethyl silicone, polyether-modified silicone, and amino-modified silicone.
The texture improver may be used alone or in combination of two or more kinds.
The content of the texture improver is preferably 5% by mass or less based on the total mass of the liquid detergent.

Examples of dye transfer inhibitors include polyvinylpyrrolidone, carboxymethylcellulose, and polyalkyleneamines.
The dye transfer inhibitor may be used alone or in combination of two or more kinds.
The content of the dye transfer inhibitor is preferably 3% by mass or less based on the total mass of the liquid detergent.

If the liquid detergent contains a dispersant, it can prevent sebum stains and their decomposition products removed from textile products during washing from adhering to the textile products again, thereby preventing yellowing of the textile products and improving the cleaning power against yellowing of textile products.
Examples of the dispersant include alkylene oxide adducts of polyalkyleneimines such as polyethyleneimine (PEI) and polypropyleneimine, polycarboxylic acid polymers, and salts of polycarboxylic acid polymers.
The dispersant may be used alone or in combination of two or more kinds.

Examples of the alkylene oxide adduct of polyalkyleneimine include an ethylene oxide adduct of polyalkyleneimine, and an ethylene oxide-propylene oxide adduct of polyalkyleneimine.
An example of a commercially available product of an alkylene oxide adduct of a polyalkyleneimine is "Sokalan HP20" manufactured by BASF.

Examples of polycarboxylic acid polymers and salts of polycarboxylic acid polymers include polyacrylic acid and its salts, polymaleic acid and its salts, acrylic acid-maleic acid copolymers and their salts, copolymers of hydrocarbons having 4 to 12 carbon atoms and maleic acid and their salts, and acrylic acid-methacrylic acid copolymers and their salts.
Commercially available polycarboxylic acid polymers and salts of polycarboxylic acid polymers include, for example, one or more selected from copolymers of hydrocarbons having 4 to 12 carbon atoms and maleic acid and salts thereof, trade names "Queenflow 540 (sodium salt)", "Queenflow 542 (sodium salt)", "Queenflow 543 (ammonium salt)", and "Queenflow 640 (sodium salt)" manufactured by Zeon Corporation; and trade name "Sokalan CP9 (sodium salt)" manufactured by BASF.
Examples of at least one selected from acrylic acid-maleic acid copolymers and salts thereof include "Sokalan CP7 (sodium salt)" manufactured by BASF and "AQUALIC TL-400 (sodium salt)" manufactured by Nippon Shokubai Co., Ltd.

The content of the dispersant is preferably 0.02 to 10% by mass, more preferably 0.2 to 8% by mass, and even more preferably 0.5 to 6% by mass, based on the total mass of the liquid detergent. If the content of the dispersant is equal to or greater than the lower limit, the cleaning power against yellowing will be better. If the content of the dispersant is equal to or less than the upper limit, the fluidity of the liquid detergent will be good.

Examples of anti-redeposition agents other than dispersants (hereinafter, also referred to as "other anti-redeposition agents") include water-soluble polymers having at least one repeating unit selected from the group consisting of alkylene terephthalate units and alkylene isophthalate units, and at least one repeating unit selected from the group consisting of oxyalkylene units and polyoxyalkylene units. Specific examples of such water-soluble polymers include products under the trade name "TexCare SRN-100" (manufactured by Clariant, mass average molecular weight 2000 to 3000), "TexCare SRN-300" (manufactured by Clariant, mass average molecular weight 7000), "Repel-O-Tex Crystal" (manufactured by Rhodia), and "Repel-O-Tex QC" (manufactured by Rhodia). Among these, TexCare SRN-100 is preferred because of its high solubility in water and excellent liquid stability. From the viewpoint of ease of handling, it is preferable to use, as another re-soil re-deposition inhibitor, a product name TexCare SRN-170C (manufactured by Clariant) which is commercially available as a 70% aqueous solution of the above-mentioned TexCare SRN-100.
The other anti-redeposition agents may be used alone or in combination of two or more.
The content of the other anti-redeposition agent is preferably 0.01 to 5% by mass based on the total mass of the liquid detergent.

Colorants other than component (A) (hereinafter also referred to as "other colorants") are not particularly limited, and examples thereof include colorants described in the "Legal Colorant Handbook" (Japan Cosmetic Industry Association) and colorants in which the end of the chromophore structure is chemically modified with a water-soluble polymer or the like. Specific examples thereof include C.I. Acid Red 138, C.I. Acid Red 260, C.I. Acid Red 106, Acid Blue 9, Blue No. 1, Blue No. 205, Green No. 3, Levanyl Violet (Levanyl Violet), Liquitint (registered trademark) BLUE SE (Liquitint (registered trademark) Blue SE), Liquitint (registered trademark) BLUE HP (Liquitint (registered trademark) Blue HP), Liquitint (registered trademark) BLUE MC (Liquitint (registered trademark) Blue MC), Liquitint (registered trademark) VIOLET CT (Liquitint (registered trademark) Violet CT), Liquitint (registered trademark) VIOLET LS (Liquitint (registered trademark) Violet LS), Liquitint (registered trademark) VIOLET DD (Liquitint (registered trademark) Violet DD), Liquitint (registered trademark) VIOLET SH (Liquitint (registered trademark) Violet SH), Liquitint (registered trademark) VIOLET FL (Liquitint (registered trademark) Violet FL), Liquitint (registered trademark) GREEN SA (Liquitint (registered trademark) GREEN SA), Liquitint (registered trademark) GREEN CC (Liquitint (registered trademark) GREEN CC), Liquitint (registered trademark) Bright Yellow (Liquitint (registered trademark) Bright Yellow), Liquitint (registered trademark) YELLOW SY (Liquitint (registered trademark) Yellow SY), Liquitint (registered trademark) YELLOW LP, Liquitint (registered trademark) PINK AL, Liquitint (registered trademark) RED MX, C.I. 77007 (Pigment Blue 29, L-280 BLUE U), C.I. 74160 (Pigment Blue 15), C.I. 77346 (Pigment Blue 28), C.I. 77343 (Pigment Blue 36), C.I. 74260 (Pigment Green 7), C.I. 74265 (Pigment Green 36), WA-S Color Green, C.I. Examples of the pigment include general-purpose dyes and pigments such as C.I. 21090 (Pigment Yellow 12, Yellow No. 205), C.I. 56110 (Pigment Red 254), C.I. 12490 (Pigment Red 5), Labracol 040 (F) Red, and PIGMOSOL (registered trademark).
The other colorants may be used alone or in combination of two or more.
The content of the other coloring agent is preferably 0.0001 to 0.05 mass %, and more preferably 0.00015 to 0.03 mass %, based on the total mass of the liquid detergent.
Since the liquid detergent contains the component (A), it does not need to contain other colorants. From the viewpoints of easily obtaining a liquid detergent colored in a desired color and further suppressing the fading of the pigment when exposed to sunlight, it is preferable that the liquid detergent substantially does not contain other colorants.

The fragrance may be a fragrance raw material alone or a fragrance composition consisting of a fragrance raw material, a fragrance solvent, a fragrance stabilizer, etc., and fragrances that are normally used in liquid detergents may be blended. Capsule fragrances may also be blended. The amount is preferably 0.01 to 5% by mass based on the total mass of the liquid detergent.

Examples of the emulsifier include polystyrene emulsion and polyvinyl acetate emulsion, and typically, emulsions with a solid content of 30 to 50% by mass are preferably used. Specific examples include polystyrene emulsion (product name: Saibinol (registered trademark) RPX-196 PE-3, solid content 40% by mass, manufactured by Saiden Chemical Industry Co., Ltd.), Opulyn 301, Acusol OP 301, etc.
The emulsifier may be used alone or in combination of two or more kinds.
The content of the emulsifier is preferably 0.001 to 0.5% by mass based on the total mass of the liquid detergent.

Examples of the fluorescent agent include biphenyl-type fluorescent agents such as 4,4'-bis-(4-chloro-3-sulfostyryl)-biphenyl disodium salt; and stilbene-type fluorescent agents such as 4,4'-bis((4-amino-6-morpholino-1,3,5-triazinyl-2)amino)stilbene-2,2'-disulfonate and 4,4'-bis((4-toluidino-6-morpholino-1,3,5-triazinyl-2)amino)stilbene-2,2'-disulfonate.
The fluorescent agent may be used alone or in combination of two or more kinds.
The content of the fluorescent agent is preferably 0.05 to 1% by mass based on the total mass of the liquid detergent.

Examples of the cationic polymer include 4,4'-bis(2-sulfostyryl)biphenyl disodium salt, polymers of dimethyldiallylammonium chloride, dimethyldiallylammonium chloride-acrylamide copolymers, dimethyldiallylammonium chloride-acrylic acid copolymers, cationic cellulose, imidazolinium chloride-vinylpyrrolidone copolymers, polyethyleneimine, cationic polyvinyl alcohol, natural polymer derivatives having an amino group such as chitosan, and copolymers of diethylamino methacrylate-ethylene oxide or the like with vinyl monomers having a hydrophilic group added thereto.
The cationic polymer may be used alone or in combination of two or more kinds.
The content of the cationic polymer is preferably 0.1 to 3% by mass based on the total mass of the liquid detergent.

<Physical Properties>
(pH)
The pH of the liquid detergent at 25°C is preferably 6 to 8.5, more preferably 6.2 to 8, and even more preferably 6.5 to 7.5. If the pH of the liquid detergent is equal to or higher than the lower limit, the stability of each component contained in the liquid detergent is increased. If the pH of the liquid detergent is equal to or lower than the upper limit, damage to textile products such as clothing can be prevented. In addition, excessive yellowing and pigment fading can be further suppressed while maintaining a uniform appearance.
The pH of the liquid detergent can be adjusted by the type and content of component (C) and, if necessary, by the addition of other pH adjusters.
The pH of the liquid detergent is measured at 25° C. using a pH meter (manufactured by DKK-TOA Corporation, product name "HM-30G").

<Production Method>
The method for producing the liquid detergent is not particularly limited, and the liquid detergent can be produced in accordance with a conventional method.
For example, the liquid detergent can be obtained by mixing the components constituting the liquid detergent. It is preferable that the component (A) is dissolved in a part of water in advance and then mixed with the other components.

[container]
The container in which the liquid detergent is filled is colorless, transparent or colorless, translucent.
In the present invention, the term "colorless and transparent" for a container means that the minimum transmittance (% Tmin) is 60% T or more in the wavelength range of 450 to 800 nm, where there is no absorbance due to the UV absorbent in the container.
Furthermore, the term "colorless and translucent" for a container means that the minimum transmittance (% Tmin) is 10% T or more and less than 60% T in the wavelength range of 450 to 800 nm.

The container may be a container capable of holding a liquid detergent, and specifically includes a container body and a cap or lid. The container body has a mouth, and the cap or lid is configured to be removably attached to the mouth of the container body.
The shape of the container body is not particularly limited as long as it has a storage space for storing the liquid detergent and a mouth part. The mouth part is preferably located at the top of the container body.

As an example of the cap, there is a cap (hereinafter, also referred to as a measuring cap) having a shape with a measuring tube portion capable of measuring liquid detergent. It is more preferable that the measuring cap has a shape having a measuring tube portion extending in the axial direction and a tongue-shaped portion provided at the axial tip of the measuring tube portion in a part of the circumferential direction centered on the axis and protruding in the axial direction.

Specific examples of the container include a bottle container (as shown in FIG. 1), a squeeze container, a trigger container, a pump container (as shown in FIG. 2), a refillable container (pouch), and the like. When the liquid detergent is discharged from these containers, it may be in the form of a liquid, a shower, or a foam. In addition, the container may be, for example, a container having a coating surface for directly applying the liquid to a textile product (a container shown in JP 2018-188785 A, FIG. 1), a bag-shaped container (a container shown in JP 2007-326641 A, FIG. 1), a water-soluble pouch (a water-soluble pouch shown in JP 2018-517015 A, FIGS. 1 to 4), and the like.
Fig. 1 is a perspective view showing one example of a liquid detergent article, and Fig. 2 is a front view showing another example of the liquid detergent article. For example, the liquid detergent article 1 shown in Fig. 1 contains a liquid detergent 10 in a container formed by combining a bottle 100, which is a container body, and a bottle cap 110.

Examples of materials for the container body include polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polycyclohexylene dimethylene terephthalate (PCT), polyacetal (POM), polyethylene naphthalate (PEN), polystyrene (PS), acrylonitrile butadiene styrene resin (ABS), cellulose propionate (CP), polyarylate, polycarbonate, acrylonitrile styrene copolymer resin (AS), etc. Among these, PET is preferably used.
The cap or lid may be made of the same material as the container body.

The container body may be entirely colorless transparent or colorless translucent, or a part of the container body may be colorless transparent or colorless translucent. The colorless transparent or colorless translucent area of the entire surface area of the container body is preferably 10% or more, more preferably 30% or more, even more preferably 50% or more, particularly preferably 70% or more, and most particularly preferably 90% or more.
The cap or lid may be entirely colorless transparent or colorless translucent, or only a part of the container body may be colorless transparent or colorless translucent. When the cap is a measuring cap, it is preferable that the entire cap is colorless transparent or colorless translucent.

The container preferably contains an ultraviolet absorbing agent. If the container contains an ultraviolet absorbing agent, fading of the component (A) can be further suppressed.
Examples of the ultraviolet absorber include ultraviolet absorbers having a benzotriazole structure (benzotriazole type ultraviolet absorbers), such as 2-(5-methyl-2-hydroxyphenyl)benzotriazole, 2-[2-hydroxy-3,5-bis(α,α-dimethylbenzyl)phenyl]-2H-benzotriazole, 2-(3-t-butyl-5-methyl-2-hydroxyphenyl)-5-chlorobenzotriazole, and 2-(2'-hydroxy-5'-t-octylphenyl)benzotriazole; and ultraviolet absorbers having a benzoxazinone structure (benzoxazinone type ultraviolet absorbers), such as 2,2'-(p-phenylene)di-3,1-benzoxazin-4-one and 2,2'-(1,4-phenylene)bis(4H-3,1-benzoxazinon-4-one).
The ultraviolet absorbing agent may be used alone or in combination of two or more kinds.

The ultraviolet absorbing agent may be blended into the resin that constitutes the container.
The content of the ultraviolet absorbing agent is preferably 0.01 to 0.3 mass %, more preferably 0.03 to 0.2 mass %, and even more preferably 0.05 to 0.15 mass %, based on the total mass of the container.

The average thickness (wall thickness) of the container body is preferably 0.01 to 3.0 mm, more preferably 0.05 to 3.0 mm, even more preferably 0.1 to 3.0 mm, particularly preferably 0.1 to 2.0 mm, and most preferably 0.2 to 1.5 mm.
The thickness of the container body can be measured with a thickness gauge.

The container body may be printed with information about ingredients or to add a design. A label may also be attached to the container body.

[how to use]
The liquid detergent article can be used by filling the container with liquid detergent and then discharging the liquid detergent by, for example, tilting the container at a given angle.
Methods for using the liquid detergent dispensed from a container include, for example, putting the liquid detergent into the liquid detergent inlet of a washing machine and then running the washing machine, putting the liquid detergent into water together with the items to be washed when washing, immersing the items to be washed in a cleaning liquid prepared by dissolving the liquid detergent in water in advance, applying the liquid detergent directly to the items to be washed and leaving it for, for example, 3 minutes to 24 hours, and then washing as usual.

It is also preferable to use a washing machine equipped with an automatic detergent dispenser, which has been put into practical use in recent years. The automatic detergent dispenser is a device that automatically dispenses liquid detergent from a tank containing the liquid detergent into the washing tub via a dust filter installed at the bottom of the tank and a dispenser pipe. A measuring means such as a syringe pump is installed in the dispenser pipe, so that a fixed amount set according to the amount of laundry can be transferred from the tank to the washing tub.
Using an automatic detergent dispenser not only saves you the trouble of measuring out the detergent, but also prevents liquid detergent from getting on your hands when measuring out the detergent, or from spilling and soiling the washing machine or surrounding area.

Examples of items to be washed include textile products such as clothing, dishcloths, towels, sheets, curtains, etc. The material of the textile products is not particularly limited, and may be any of natural fibers such as cotton, silk, wool, etc., and chemical fibers such as polyester, polyamide, etc.
When the liquid detergent is used by dissolving it in water, it is preferable to dilute it, for example, 5 to 6000 times (by volume).
The liquor ratio, which is the amount of water per amount of clothes (mass of washing liquid during washing/mass of clothes), is preferably 5 or more for a drum type washing machine and 10 or more for a vertical washing machine.
The liquid detergent is suitable as a detergent for textile products.

[Action and Effect]
The liquid detergent constituting the liquid detergent article of the present embodiment described above contains the (B) component, and has an absorbance retention rate of 50% or more as calculated by the formula (i), so that it can suppress pigment fading when exposed to sunlight. In addition, since it contains the (C) component as a neutralizing agent, it has excellent low-temperature stability and can maintain a uniform appearance. Moreover, the (B) component turns yellow after the antioxidant reaction, and the (C) component turns yellow appropriately over time, so that it has the effect of compensating for the yellowness.
In this way, the liquid detergent article of the present embodiment is able to maintain a uniform appearance while simultaneously preventing excessive yellowing and preventing pigment fading when exposed to sunlight.

The liquid detergent constituting the liquid detergent article of this embodiment has an absorbance peak at a wavelength of 400 to 550 nm. That is, the liquid detergent is colored to a color included in the range of 5YR to 5Y on the Munsell color wheel. With the liquid detergent article of this embodiment, excessive yellowing and pigment fading can be suppressed, so there is less impact on the appearance compared to the state of the liquid detergent article before storage. In addition, even if printing or labeling is performed on the container in which the liquid detergent is filled, there is little impact on the color and appearance of the printing or label, making it easy to see.

The present invention will be described in more detail below with reference to examples, but the present invention is not limited to the following description. In the examples, "%" indicates "mass %" unless otherwise specified.

"Ingredients used"
As the component (A), the compound shown below was used.
Brilliant Orange: Liquitint (registered trademark) BRILLIANT ORANGE (manufactured by Milliken).
・Nylosan Orange S-3R srg: Manufactured by Arcroma Japan Co., Ltd.
Red ET: Liquitint (registered trademark) RED ET (manufactured by Milliken).
Yellow No. 407: Fast Light Yellow 3G (CI Number: C.I. 18820, manufactured by Kishi Chemical Co., Ltd.).
Red No. 106: Acid Red (CI Number: C.I. 45100, manufactured by Kishi Chemical Co., Ltd.).
Yellow No. 203: Quinoline Yellow WS (CI Number: C.I. 47005, manufactured by Kishi Chemical Industries, Ltd.).

As the component (B), the compound shown below was used.
BHT: dibutylhydroxytoluene (manufactured by Sumitomo Chemical Co., Ltd., product name "SUMILZER BHT-R").

As the component (C), the compound shown below was used.
MEA: Monoethanolamine (manufactured by Nippon Shokubai Co., Ltd., product name "Monoethanolamine").

As the component (D), the compound shown below was used.
LAS-H: Linear alkylbenzenesulfonic acid having an alkyl group with 10 to 14 carbon atoms (component (D1-1)). A color value of 50 (manufactured by Lion Corporation, product name "Lipon LH-200") was used.
AES-1: Polyoxyalkylene alkyl ether sulfate (compound (1), (D1-2) component, in which in general formula (1), R ¹ is an alkyl group having 12 carbon atoms and an alkyl group having 14 carbon atoms, v is 1, w is 0, M is sodium, and the proportion of compounds in which v is 0 and w is 0 relative to the total amount of AES is 43 mass %). Synthesized by the following synthesis method.
AE7: polyoxyethylene alkyl ether obtained by adding 7 moles of ethylene oxide to an alcohol having 12 to 14 carbon atoms (manufactured by Lion Specialty Chemicals Co., Ltd., product name "Leox CL-70", compound (2) in which, in the general formula (2), R ² is an alkyl group having 12 carbon atoms and an alkyl group having 14 carbon atoms, R ³ is a hydrogen atom, p1 is 7, q1 is 0, and r1 is 0), component (D2)).
AE15: Polyoxyethylene alkyl ether in which 15 moles of ethylene oxide are added to natural alcohol (compound (2) (D2) component in which, in general formula (2), ^R2 is an alkyl group having 12 carbon atoms and an alkyl group having 14 carbon atoms, ^R3 is a hydrogen atom, p1 is 15, q1 is 0, and r1 is 0). Synthesized by the following synthesis method.

<Method of synthesis of AES-1>
Into a 4 L autoclave, 400 g of raw material alcohol (trade name "CO-1270" manufactured by Procter & Gamble Co.) and 0.8 g of potassium hydroxide catalyst as a reaction catalyst were charged, and the atmosphere inside the autoclave was replaced with nitrogen, and then the temperature was raised with stirring.
Next, 91 g of ethylene oxide (gaseous) was introduced while maintaining the temperature at 180° C. and the pressure at 0.3 MPa or less, and reacted to obtain an alcohol ethoxylate.
Analysis using a gas chromatograph: GC-5890 manufactured by Hewlett-Packard, a detector: a flame ionization detector (FID), and a column: Ultra-1 (manufactured by HP, L25m×φ0.2mm×T0.11μm) showed that the average number of moles of ethylene oxide added in the obtained alcohol ethoxylate was 1.0. In addition, the amount of compounds to which ethylene oxide was not added (those that ultimately became component (b-0)) was 43% by mass based on the total amount of the obtained alcohol ethoxylate.
Next, 237 g of the alcohol ethoxylate obtained above was placed in a 500 mL flask equipped with a stirrer, and after replacing with nitrogen, 96 g of liquid sulfuric anhydride (sulfane) was slowly added dropwise while maintaining the reaction temperature at 40° C. After the dropwise addition was completed, stirring was continued for 1 hour (sulfation reaction) to obtain polyoxyethylene alkyl ether sulfate. This was then neutralized with an aqueous sodium hydroxide solution to obtain AES-1.

<Method of synthesis of AE15>
565.78 g of CO-1214 (trade name) manufactured by Procter & Gamble Co., 224.4 g of natural alcohol (trade name "CO-1214" manufactured by Procter & Gamble Co.), and 2.0 g of 30% by mass aqueous sodium hydroxide solution were charged into a pressure-resistant reactor, and the atmosphere in the reactor was replaced with nitrogen. Next, the mixture was dehydrated at a temperature of 100°C and a pressure of 2.0 kPa or less for 30 minutes, and then the temperature was raised to 160°C.
Next, 760.6 g of ethylene oxide (gaseous) was gradually added to the reaction liquid while stirring the reaction liquid. At this time, ethylene oxide was added from the blowing tube while adjusting the addition rate so that the reaction temperature did not exceed 180°C. After the addition of ethylene oxide was completed, the mixture was aged for 30 minutes at a temperature of 180°C and a pressure of 0.3 MPa or less, and then unreacted ethylene oxide was distilled off for 10 minutes at a temperature of 180°C and a pressure of 6.0 kPa or less. Next, the temperature was cooled to 100°C or less, and 70% by mass p-toluenesulfonic acid was added to neutralize the reaction product so that the pH of a 1% by mass aqueous solution of the reaction product became about 7, to obtain AE15.

As optional components and water, the compounds shown below were used.
・Palm fatty acid: Manufactured by NOF Corporation, product name "Palm Fatty Acid".
HP20: Ethylene oxide adduct of polyethyleneimine (manufactured by BASF, trade name "Sokalan HP20").
Diclosan: 4,4'-dichloro-2-hydroxydiphenyl ether (manufactured by BASF, trade name "TINOSAN (registered trademark) HP100").
SRN-170C: 70% by mass aqueous solution of Clariant's trade name "TexCare SRN-100"(Lariant's trade name "TexCare SRN-170C").
- Citric acid: Manufactured by Fuso Gakuin Kogyo Co., Ltd., product name "Liquid Citric Acid".
Ethanol: Manufactured by Japan Alcohol Sales Co., Ltd., product name "Specific Alcohol 95% Synthetic".
PEG1000: Polyethylene glycol (manufactured by Lion Corporation, product name "PEG#1000-L60", weight average molecular weight = 1000).
Sodium lactate: Sodium lactate (manufactured by Musashino Chemical Laboratory Co., Ltd., product name "Sodium Lactate").
Solfit: 3-methoxy-3-methylbutanol (manufactured by Kuraray Co., Ltd., trade name "Solfit").
Enzyme: Multienzyme (Novozymes, trade name "Medley Core 210L", enzyme liquid preparation).
-Fragrance: Givaudan Japan Co., Ltd., product name "Aquatic Powder".
Other pH adjusters: aqueous sodium hydroxide solution.
・Water: Ion-exchanged water.

"Measurement and Evaluation"
<Measurement of Absorbance Maintenance Rate>
As a colorless and transparent container, a PET container containing 0.1% of 2-(3-t-butyl-5-methyl-2-hydroxyphenyl)-5-chlorobenzotriazole (manufactured by BASF, product name "Tinuvin (registered trademark) 326") as an ultraviolet absorber having a benzotriazole structure was used.
The liquid detergent immediately after production was left at room temperature (25° C.) for 1 hour. The absorbance of the liquid detergent after being left was measured using a UV-Vis spectrophotometer to determine the absorbance at the maximum absorption wavelength (W _M ). This absorbance was defined as the absorbance of the liquid detergent before the sunlight exposure test.
Next, 400 g of the liquid detergent was filled into a colorless transparent container, and the container was placed in a location exposed to direct sunlight with the lid tightly closed. A sunlight exposure test was then performed by irradiating the liquid detergent with sunlight at a wavelength of 300 to 400 nm until the cumulative exposure amount reached 15 MJ/ ^m2 .
The absorbance of the liquid detergent after the sunlight exposure test was measured using a UV-Vis spectrophotometer to determine the absorbance at the maximum absorption wavelength (W _M ). This absorbance was defined as the absorbance of the liquid detergent after the sunlight exposure test.
The absorbance retention rate was calculated from the following formula (i).
Absorbance retention rate (%)=(absorbance of liquid cleaner after sunlight exposure test at maximum absorption wavelength (W _M )/absorbance of liquid cleaner before sunlight exposure test at maximum absorption wavelength (W _M ))×100 (i)

<Evaluation of inhibition of yellowing and pigment fading>
A sunlight exposure test was carried out in the same manner as in the measurement of the absorbance retention rate.
The color of the liquid cleaner was visually checked for yellowing and fading of the pigment before and after the sunlight exposure test, and was evaluated according to the following criteria. ◯ and △ are considered to be pass.
<<Evaluation criteria>>
◯: The color tone after the sunlight exposure test is almost unchanged compared to the color tone before the sunlight exposure test.
Δ: The color tone after the sunlight exposure test changes slightly compared to the color tone before the sunlight exposure test, but is within the acceptable range.
×: The color tone after the sunlight exposure test is different from the color tone before the sunlight exposure test, and is unacceptable.

<Evaluation of uniformity>
A glass container was used as the colorless and transparent container.
Immediately after production, 100 g of the liquid detergent was filled into a colorless transparent container, and the container was sealed with a lid and left to stand in a thermostatic chamber set at 50° C. or −5° C. for 30 days.
The appearance of the liquid detergent after storage was visually observed and evaluated according to the following criteria. ◯ and △ are considered to be acceptable.
<<Evaluation criteria>>
◯: No precipitation, sedimentation or phase separation was observed.
Δ: One or more of deposition, precipitation, and phase separation was observed, but was resolved by leaving the solution at 25° C. for 30 minutes.
x: One or more of deposition, precipitation and phase separation was observed, and this was not resolved even after standing at 25°C for 30 minutes.

"Examples 1 to 8, Comparative Examples 1 to 4"
In a 500 mL beaker, component (A), component (B), component (C), component (D), optional components, and water were charged according to the formulations shown in Tables 1 to 3, and the mixture was thoroughly stirred with a Three-One Motor Stirrer (manufactured by AS ONE Corporation) to obtain a liquid detergent.
The pH of the resulting liquid detergent at 25° C. was measured using a pH meter (manufactured by DKK-TOA Corporation, product name “HM-30G”). The results are shown in Tables 1 to 3.
The pH of the resulting liquid detergent at 25° C. was measured using a pH meter (manufactured by DKK-TOA Corporation, product name “HM-30G”). The results are shown in Tables 1 to 3.
The obtained liquid detergents were also evaluated for inhibition of yellowing and pigment fading, and for uniformity. The results are shown in Tables 1 to 3. Note that the measurement of the absorbance retention rate and the evaluation of inhibition of yellowing and pigment fading of the liquid detergents were only performed for the liquid detergents that were all rated "good" for uniformity.

In Tables 1 to 3, the amount (mass %) of each component is the percentage relative to the total mass of the liquid detergent, and unless otherwise specified, is shown as a value calculated on a pure basis. The amount (mass %) of component (A) includes the amount of water and other components contained in the formulation. The "balance" amount of water is the amount of water required separately to make the total amount (mass %) of all components contained in the liquid detergent 100 mass %. The "appropriate amount" of other pH adjusters is the amount required to adjust the pH of the liquid detergent to 7. A blank amount indicates that the component is not included (amount 0 mass %).
In addition, in Tables 1 to 3, "D1-1/D ratio" is the mass ratio of the component (D1-1) to the component (D), and "D2/D1 ratio" is the mass ratio of the component (D2) to the component (D1).

As is clear from Tables 1 and 2, the liquid cleaners obtained in each Example were able to suppress excessive yellowing and pigment fading when exposed to sunlight, and maintained a uniform appearance.
Therefore, if the liquid cleaning agent obtained in each example is filled into a colorless, transparent or colorless, translucent container with printing or labeling and stored, it is easy to see with little effect on the color or appearance of the printing or label.

On the other hand, as is clear from Table 3, the liquid detergents obtained in Comparative Examples 1, 2, and 4 had a low absorbance retention rate of less than 50%, and the pigments were easily faded. Therefore, when the liquid detergents obtained in Comparative Examples 1, 2, and 4 were filled and stored in a colorless, transparent or colorless, translucent container on which printing or labeling was performed, the color and appearance of the printing or labeling was affected, making the printing or labeling difficult to see.
The liquid detergent obtained in Comparative Example 3, which did not contain component (C), had poor uniformity when stored at -5°C.

1 Liquid detergent article 10 Liquid detergent 100 Bottle 110 Bottle cap

Claims (5)

(A) component: a water-soluble dye preparation having an absorbance peak at a wavelength of 400 to 550 nm;
(B) component: an antioxidant;
(C) component: alkanolamine,
(D) component: a surfactant,
A liquid detergent article in which a liquid detergent containing the above is filled in a colorless, transparent or colorless, translucent container,
The liquid cleaning agent has an absorbance peak at a wavelength of 400 to 550 nm,
When the absorbance of the liquid detergent at the maximum absorption wavelength (W _M ) is 0.03 or more, the liquid detergent article has an absorbance retention rate of 50% or more, calculated from the following formula (i) when a sunlight exposure test is carried out at a wavelength of 300 to 400 nm until an integrated exposure amount reaches 15 MJ/m ² :
Absorbance retention rate (%)=(absorbance of liquid cleaner after sunlight exposure test at maximum absorption wavelength (W _M )/absorbance of liquid cleaner before sunlight exposure test at maximum absorption wavelength (W _M ))×100 (i) The component (D) contains a component (D1-1): linear alkylbenzene sulfonic acid and/or a salt thereof,
The liquid detergent article according to claim 1, wherein the mass ratio of the component (D1-1) to the component (D) is 0.16 to 0.36. The liquid detergent article according to claim 1 or 2, wherein the content of the (D) component is 35% by mass or more based on the total mass of the liquid detergent. The liquid detergent article according to claim 1 or 2, wherein the component (B) contains at least one of dibutylhydroxytoluene and L-ascorbic acid. The liquid detergent article according to claim 1 or 2, wherein the container contains an ultraviolet absorber having a benzotriazole structure or a benzoxazinone structure.

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