JP7350046B2 - Liquid detergent composition for clothing - Google Patents

Description

The present invention relates to a liquid detergent composition for clothing, a method for producing a liquid detergent composition for clothing, and a method for washing clothing.

There are two main types of washing methods for textile products such as clothing: hand washing and washing machine washing. In recent years, washing machines have become more popular in Asia, but hand-washing is still widely practiced due to its cleaning power, economy, cultural background, and awareness of washing. Hand-washing is suitable for cleaning not only general dirt attached to fibers but also localized dirt such as spilled food, as the worker can wash the fabric while checking the progress of dirt removal. In hand-washing, many workers wash clothes using a cleaning solution obtained by dissolving a cleaning agent, such as a powdered or liquid cleaning agent, in water.

In addition to being used for preparing a cleaning solution, the liquid cleaning agent can also be used by directly applying it to textile products. For example, in hand-washing, a liquid detergent can be applied to areas of textile products that are conspicuously soiled during the washing process, and the textile products can be rubbed and washed.

US Pat. No. 5,002,001 describes a liquid detergent comprising from about 5% to about 20% by weight of a surfactant system, said surfactant system having an alkoxylated degree of alkoxylation of from 0.20 to 1.75. a liquid anionic surfactant, the detergent having an injection viscosity at 20° C. of about 2500 mPa·s to about 6000 mPa·s, and a ratio of medium shear viscosity to high shear viscosity of about 2 to about 1. A detergent is disclosed. It is said that the liquid detergent can contain electrolytes such as sodium chloride.

Patent Document 2 discloses a surfactant composition obtained by mixing a predetermined ether sulfate salt containing an ethyleneoxy group and a predetermined ether sulfate salt containing an alkyleneoxy group having 3 or 4 carbon atoms. ing. It is said that the surfactant composition can further contain an inorganic salt such as sodium chloride.

Patent Document 3 describes a liquid detergent containing (A) a specific α-sulfo fatty acid alkyl ester salt, (B) an anionic surfactant other than (A), and (C) a betaine type amphoteric surfactant. is disclosed. It is said that the liquid cleaning agent can further contain a water-soluble inorganic salt such as magnesium sulfate.

Special Publication No. 2016-503833 Japanese Patent Application Publication No. 2009-120664 International Publication No. 2017/069017

In addition to having good detergency, it is advantageous in terms of convenience that a single formulation can be used for both preparation of a cleaning liquid and application cleaning for liquid cleaning compositions used for hand washing and the like. In general, it is considered desirable to appropriately increase the viscosity of a liquid cleaning composition for coating and cleaning, but there is a concern that dispersibility and solubility may decrease when mixing with water to prepare a cleaning liquid.

The present invention provides a liquid detergent composition for clothing that has a viscosity suitable for application and cleaning, has excellent detergency, and has excellent dispersibility and solubility in water.

The present invention contains (a) a surfactant [hereinafter referred to as component (a)] in an amount of 5% by mass or more and 30% by mass or less, and water;
η 0.1 /η 100, which is the ratio of the viscosity η _0.1 at a shear rate of 0.1 S ⁻¹ at 30° _C. to the viscosity η ₁₀₀ at a shear rate of ₁₀₀ S ⁻¹ at 30° C., is 1.5 or more and 30 or less. ,
G' 100 /G'' ₁₀₀ , which is the ratio between storage modulus G' ₁₀₀ and loss modulus G'' ₁₀₀ at an angular frequency of 100 rad/ _s , is 1 or more;
G' 1.0 /G'' 1.0, which is the ratio between the _storage modulus G' _1.0 and the loss modulus G _' ' _1.0 at an angular frequency of 1.0 rad/s, is less than 1;
The present invention relates to a liquid detergent composition for clothing.

In addition, the present invention provides a step of mixing a component containing (a) a surfactant [hereinafter referred to as component (a)] and water to produce a liquid detergent composition for clothing containing component (a) and water. A method for producing a liquid detergent composition for clothing, comprising:
(a) component is used in an amount of 5% by mass or more and 30% by mass or less of the total amount of the components to be mixed,
By adjusting the types and amounts of the components to be mixed, the resulting liquid detergent composition for clothing can be obtained as shown in (I) to (III) below.
(I) η 0.1 /η 100, which is the ratio of the viscosity η _0.1 at a shear rate of 0.1 S ⁻¹ at 30°C to the viscosity η ₁₀₀ at a shear rate of ₁₀₀ S ⁻¹ at 30° C., is _1.5 or more and 30 Hereinafter, (II) G' 100 /G'' ₁₀₀ , which is the ratio between the storage modulus G' ₁₀₀ and the loss modulus G'' ₁₀₀ at an angular frequency of 100 rad/ _s , is 1 or more;
(III) _G ' 1.0 /G'' 1.0, which is the ratio of storage elastic modulus G' _1.0 and loss elastic modulus G _' ' _1.0 at an angular frequency of 1.0 rad/s, is less than 1;
to satisfy
The present invention relates to a method for producing a liquid detergent composition for clothing.

The present invention also relates to a method of washing clothes, which comprises washing clothes with the liquid detergent composition for clothes of the present invention.

According to the present invention, there is provided a liquid detergent composition for clothing that has a viscosity suitable for application and cleaning, has excellent detergency, and has excellent dispersibility and solubility in water.

[Liquid detergent composition for clothing]
Component (a) is a surfactant.
Component (a) includes one or more surfactants selected from anionic surfactants, nonionic surfactants, amphoteric surfactants, and cationic surfactants.
The liquid detergent composition for clothing of the present invention preferably contains an anionic surfactant as component (a). In this case, a surfactant other than the anionic surfactant may be contained, and the surfactant other than the anionic surfactant is preferably a surfactant selected from nonionic surfactants and amphoteric surfactants. .

From the viewpoint of detergency and solubility, the liquid detergent composition for clothing of the present invention contains component (a) in an amount of 5% by mass or more, preferably 7% by mass or more, more preferably 10% by mass or more, and 30% by mass or more. The content is at most 25% by mass, preferably at most 25% by mass, more preferably at most 20% by mass. In addition, in this invention, the compounding amount of each component, such as (a) component at the time of preparing the liquid detergent composition for clothing of this invention, can be considered as each content.

From the viewpoint of detergency, the liquid detergent composition for clothing of the present invention contains an anionic surfactant as the component (a), and the proportion of the anionic surfactant in the component (a) is 75% by mass. In addition to the above, it is preferably 80% by mass or more, further preferably 85% by mass or more, and 100% by mass or less, and this proportion may be 100% by mass.

The liquid laundry detergent composition of the present invention contains an anionic surfactant in an amount of preferably 5% by mass or more, more preferably 10% by mass or more, and more preferably 25% by mass or less, from the viewpoint of detergency. contains 20 mass or less.

The liquid detergent composition for clothing of the present invention preferably contains polyoxyalkylene alkyl ether sulfate or a salt thereof (hereinafter referred to as AES) as component (a). Examples of the oxyalkylene group of AES include oxyethylene group and oxypropylene group. The average number of added moles of oxyalkylene groups in AES is preferably 1 or more and 4 or less. The alkyl group of AES preferably has 8 or more carbon atoms, more preferably 10 or more carbon atoms, and further preferably has 18 or less carbon atoms, more preferably 16 or less carbon atoms. When AES is a salt, an alkali metal salt is preferred, and a sodium salt is more preferred.

From the viewpoint of detergency, the liquid detergent composition for clothing of the present invention contains AES as component (a), and the proportion of AES in component (a) is 75% by mass or more, furthermore 80% by mass or more, Further, it is preferably 85% by mass or more and 100% by mass or less, and this proportion may be 100% by mass.

The liquid laundry detergent composition of the present invention contains AES in an amount of preferably 5% by mass or more, more preferably 10% by mass or more, and preferably 25% by mass or less, more preferably 20% by mass, from the viewpoint of detergency and viscosity. Contains less than the mass.

The liquid detergent composition for clothing of the present invention preferably contains an inorganic salt as component (b).
Component (b) includes one or more inorganic salts selected from inorganic sulfates and inorganic chlorides.
Examples of inorganic sulfates include alkali metal sulfates and alkaline earth metal sulfates. Examples of the alkali metal sulfate include sodium sulfate. Examples of the alkaline earth metal sulfate include magnesium sulfate.
Examples of inorganic chlorides include alkali metal chlorides. Examples of alkali metal chlorides include lithium chloride and sodium chloride.
Component (b) is preferably an alkali metal sulfate, more preferably sodium sulfate.

The liquid detergent composition for clothing of the present invention preferably contains sodium sulfate as component (b).

The liquid detergent composition for clothing of the present invention contains sodium sulfate as the component (b), and can also contain an inorganic salt other than sodium sulfate. In that case, the inorganic salt other than sodium sulfate is preferably one or more inorganic salts selected from magnesium sulfate, lithium chloride, and sodium chloride.

The liquid detergent composition for clothing of the present invention contains sodium sulfate as component (b), and the proportion of sodium sulfate in component (b) is preferably 30% by mass or more, more preferably 40% by mass or more, More preferably, it is 50% by mass or more, and preferably 100% by mass or less. This proportion may be 100% by weight.

From the viewpoint of viscosity control, the liquid detergent composition for clothing of the present invention contains component (b) in an amount of 2% by mass or more, preferably 2.5% by mass or more, more preferably 3% by mass or more, and 20% by mass. % or less, preferably 18% by mass or less, more preferably 15% by mass or less, still more preferably 10% by mass or less, still more preferably 5% by mass or less.

When the liquid detergent composition for clothing of the present invention contains component (b), the content of component (a) and the content of component (b) in the composition are determined from the viewpoint of achieving both detergency and solubility. The mass ratio (a)/(b) is preferably 1 or more, more preferably 3 or more, and preferably 15 or less, more preferably 5 or less.

The liquid laundry detergent composition of the present invention contains water. The content of water in the composition is preferably 50% by mass or more, more preferably 70% by mass or more, and preferably 90% by mass or less, more preferably 85% by mass or less.

The liquid detergent composition for clothing of the present invention may contain optional ingredients such as foam boosters, enzymes, pH adjusters, stabilizers, fluorescent dyes, fragrances, pigments, preservatives, and solvents. .
Examples of the pH adjuster include alkaline agents and acid agents. Examples of the alkaline agent include alkanolamines such as monoethanolamine, and alkanolamines having 1 to 5 carbon atoms. Examples of the acid agent include organic acids such as citric acid. The pH adjuster is preferably used so that the pH of the composition of the present invention falls within the range described below. Among the pH adjusters, alkanolamines such as monoethanolamine are preferred as alkaline agents from the viewpoints of detergency and stability. The liquid detergent composition for clothing of the present invention contains alkanolamine and further monoethanolamine, preferably at least 0.2% by mass, more preferably at least 0.4% by mass, and preferably at most 2% by mass. Preferably it is contained in an amount of 1% by mass or less. Among the pH adjusters, the acid agent is preferably an organic acid such as citric acid from the viewpoint of detergency and stability. The liquid detergent composition for clothing of the present invention contains an organic acid, and further contains citric acid, preferably at least 0.05% by mass, more preferably at least 0.1% by mass, and more preferably at most 2% by mass. contains 1% by mass or less.

The liquid laundry detergent composition of the present invention has a viscosity η _0.1 which is the ratio of a viscosity η _0.1 at a shear rate of 0.1 S ⁻¹ at 30° C. to a viscosity η ₁₀₀ at a shear rate of 100 S ⁻¹ at 30° C. / _η100 is 1.5 or more and 30 or less. From the viewpoint of detergency and solubility, η _0.1 /η ₁₀₀ is preferably 1.8 or more, more preferably 2 or more, and preferably 15 or less, more preferably 10 or less. The high viscosity of a liquid cleaning agent under low shear conditions means that the liquid cleaning agent has a high viscosity when the mechanical force applied to the liquid cleaning agent is small. It is thought that improved adhesion leads to improved cleaning power. In addition, the fact that a liquid detergent has a low viscosity under high shear means that it has a low viscosity when the mechanical force applied to the liquid detergent is large, and it is easily dispersed in water when rinsing in a washing machine. This is thought to lead to a reduction in the amount of undissolved material. By having η _0.1 /η ₁₀₀ within a predetermined range, the liquid laundry detergent composition of the present invention can exhibit viscosity behavior in response to changes in mechanical force due to differences in cleaning modes, and can be applied to and cleaned. It is presumed that excellent detergency and solubility can be obtained in various washing modes such as bath washing (washing in a washing machine).
In the present invention, the viscosities η _0.1 and η ₁₀₀ are determined using a rotary rheometer (manufactured by Anton Paar, model number MCR302, using a cone plate with a diameter of 50 mm) at 30°C and at a shear rate of 0.1 s ^- Measured under conditions of ¹ or 100 s ⁻¹ .

In the liquid detergent composition for clothing of the present invention, G' 100 /G'' 100, which is the ratio between _storage modulus G' ₁₀₀ and loss _modulus G'' ₁₀₀ at an angular frequency of 100 rad/s, is 1 or more. . From the viewpoint of coating cleaning power, G' ₁₀₀ /G'' ₁₀₀ is preferably 1.4 or more, more preferably 1.6 or more, and preferably 10 or less, more preferably 8 or less. The liquid detergent composition for clothing of the present invention has G′ ₁₀₀ /G″ ₁₀₀ within a predetermined range, so that when mechanical force is applied to the composition for a short time, the composition has solid properties. For example, when the composition is used by applying it to dirt, it is presumed that the adhesion of the composition to the dirt increases and high cleaning power is exhibited.
In the present invention, the storage modulus G' ₁₀₀ and the loss modulus G'' ₁₀₀ are each measured at 100 rad at 30°C using a rotary rheometer (manufactured by Anton Paar, model number MCR302, using a cone plate with a diameter of 50 mm). G' and G'' obtained at 100 rad are defined as storage modulus G' ₁₀₀ and loss modulus G'' ₁₀₀ .

The liquid detergent composition for clothing of the present invention has G' 1.0 /G, which is the ratio of the storage modulus G' _1.0 and the loss modulus G'' _1.0 at an angular frequency _of 1.0 rad/s. '' _1.0 is less than 1. From the viewpoint of solubility, G' _1.0 /G'' _1.0 is preferably 0 or more, more preferably 0.01 or more, and preferably 0.7 or less, more preferably 0.5 or less. be. The liquid detergent composition for clothing of the present invention has G′ _1.0 /G″ _1.0 within a predetermined range, so that when mechanical force is applied to the composition for a long time, the composition It is assumed that the composition becomes less likely to exhibit solid properties, and that the composition is easily dispersed in water during washing or rinsing in a washing machine, reducing the amount of undissolved material.
In the present invention, the storage modulus G' _1.0 and the loss modulus G'' _1.0 are the same as the storage modulus G' ₁₀₀ and the loss modulus G'' ₁₀₀ , respectively, except that the angular frequency is Measured as .0 rad/s.

From the viewpoint of ease of measurement and solubility, the liquid detergent composition for clothing of the present invention has a viscosity at 30°C of preferably 2000 mPa·s or more, more preferably 2500 mPa·s or more, and even more preferably 3000 mPa·s. above, and preferably 100,000 mPa·s or less, more preferably 30,000 mPa·s or less, still more preferably 10,000 mPa·s or less, and even more preferably 5,000 or less. This viscosity was measured with a B-type viscometer (VISCOMETER TVB-10, manufactured by Toki Sangyo Co., Ltd.) (30° C., M3, 12 rpm).

From the viewpoint of detergency, the liquid detergent composition for clothing of the present invention has a pH at 30° C. of preferably 8 or higher, more preferably 9 or higher, and preferably 11 or lower, more preferably 10.5 or lower. It is. This pH may be measured using, for example, a pH meter (Horiba, Ltd., model number: D-71).

The liquid detergent composition for clothing of the present invention is suitable for hand washing, that is, for hand washing clothing.

The liquid detergent composition for clothing of the present invention is suitable as a spreadable composition. The coating type may mean that it is used in a cleaning method in which it is directly applied to clothing and used for cleaning.

[Method for producing liquid detergent composition for clothing]
The present invention provides a liquid detergent for clothing, in which a liquid detergent composition for clothing containing component (a) and water is produced by mixing a component containing (a) a surfactant [component (a)] and water. A method for producing a composition, the method comprising:
(a) component is used in an amount of 5% by mass or more and 30% by mass or less of the total amount of the components to be mixed,
By adjusting the types and amounts of the components to be mixed, the resulting liquid detergent composition for clothing can be obtained as shown in (I) to (III) below.
(I) η 0.1 /η 100, which is the ratio of the viscosity η _0.1 at a shear rate of 0.1 S ⁻¹ at 30°C to the viscosity η ₁₀₀ at a shear rate of ₁₀₀ S ⁻¹ at 30° C., is _1.5 or more and 30 Hereinafter, (II) G' 100 /G'' ₁₀₀ , which is the ratio between the storage modulus G' ₁₀₀ and the loss modulus G'' ₁₀₀ at an angular frequency of 100 rad/ _s , is 1 or more;
(III) G' 1.0 /G'' 1.0, which is the ratio of storage elastic modulus G' _1.0 and loss elastic modulus G _' ' _1.0 at an angular frequency of 1.0 rad/ _s , is less than 1;
to satisfy
A method of manufacturing a liquid laundry detergent composition is provided. The liquid detergent composition for clothing of the present invention can be produced by the production method of the present invention.

The matters described in connection with the liquid detergent composition for clothing of the present invention can be appropriately applied to the manufacturing method of the present invention. Specific examples and preferred examples of component (a) are also the same as in the liquid detergent composition for clothing of the present invention. The measurement methods and preferred ranges of η _0.1 /η ₁₀₀ , G' ₁₀₀ /G'' ₁₀₀ , and G' _1.0 /G'' _1.0 are also the same as in the liquid detergent composition for clothing of the present invention. . In the production method of the present invention, it is preferable to mix an inorganic salt as component (b). Specific examples and preferred examples of component (b) are also the same as in the liquid detergent composition for clothing of the present invention.

The value of η _0.1 /η ₁₀₀ increases when, for example, the amount of a surfactant component among the components to be mixed is increased. Moreover, when the amount of inorganic salt component is increased, the value tends to decrease. Based on this, the value of this ratio can be adjusted by adjusting the types and amounts of components such as surfactants and inorganic salts.

The value of G' ₁₀₀ /G'' ₁₀₀ tends to increase when the amount of the surfactant or inorganic salt among the components to be mixed is increased. Based on this, the value of this ratio can be adjusted by adjusting the types and amounts of components such as surfactants and inorganic salts.

The value of G' _1.0 /G'' _1.0 tends to increase when, for example, the amount of a surfactant component among the components to be mixed is increased. Based on this, the value of this ratio can be adjusted by adjusting the type and amount of surfactant components.

[How to wash clothes]
According to the present invention, a method for washing clothes is provided, in which clothes are washed with the liquid detergent composition for clothes of the present invention.
In the cleaning method of the present invention, the clothing can be washed after applying the liquid detergent composition for clothing of the present invention to the clothing.
In the cleaning method of the present invention, the liquid detergent composition for clothing of the present invention can be applied to clothing, and the applied area can be washed by hand.

In the clothing cleaning method of the present invention, it is preferable that the liquid clothing detergent composition of the present invention is diluted with water at the location where it is applied to the clothing. Dilution can be carried out, for example, by applying the liquid detergent composition for clothing of the present invention to clothing and then contacting it with water, or by applying the liquid detergent composition for clothing of the present invention to clothing containing water. This can be done by The dilution ratio is preferably 2 times or more and preferably 100 times or less.

An example of a cleaning method using the liquid laundry detergent composition of the present invention includes (1) preparing a cleaning solution using the liquid laundry detergent composition of the present invention and water; (2) adding the cleaning solution to the cleaning solution; A method for washing clothes includes soaking the clothes, applying the liquid detergent composition for clothes of the present invention to the soaked clothes, and (3) hand-washing the coated areas of the clothes.

Furthermore, other examples of cleaning methods using the liquid laundry detergent composition of the present invention include (1) preparing a cleaning liquid using the liquid laundry detergent composition of the present invention and water; ) immersing clothing in the cleaning liquid and applying the liquid detergent composition for clothing of the present invention to the soaked clothing; (3) hand washing the coated area of the clothing; (4) washing the clothing after hand washing. An example of a method for washing clothing includes bringing the clothing into contact with the cleaning liquid and washing the clothing by hand.

Examples of hand-washing methods include washing clothes by hand, rubbing clothes together by hand, and rubbing clothes with a tool such as a brush with fiber bundles flocked on them.

A liquid detergent composition for clothing was prepared using the ingredients shown in Table 1, and the following evaluations were performed. The results are shown in Table 1. The components used in the table are as follows.
・ES (1): Polyoxyethylene (average number of added moles of ethylene oxide 1) sodium lauryl ether sulfate, Emar 170J (manufactured by Kao Corporation)
・ES (2): Polyoxyethylene (average number of added moles of ethylene oxide 2) sodium lauryl ether sulfate, Emar 270J (manufactured by Kao Corporation)
・LAS: Sodium laurylbenzenesulfonate, Neoperex G-15 (manufactured by Kao Corporation)
・AE (EO3): Polyoxyethylene (average number of added moles of ethylene oxide 3) alkyl (carbon number 10-14) ether, Emulgen 103 (manufactured by Kao Corporation)
・AE (EO6): Polyoxyethylene (average number of added moles of ethylene oxide 6) alkyl (carbon number 10-14) ether, Emulgen 108 (manufactured by Kao Corporation)
・C12AB: laurylamide propyl betaine, amphitol 20AB (manufactured by Kao Corporation)
・PEG (2 million): Polyethylene glycol with a weight average molecular weight of 2 million ・MEA: Monoethanolamine

(1) Evaluation of cleaning power <Preparation of artificially contaminated cloth>
6cm x 6cm cotton/polyester broad blend dyed cloth (cotton/polyester ratio = 35/65, purchased from Tanigashira Shoten) was gravure coated with an artificial stain consisting of the following composition to give 100mg per piece for artificial contamination. I made multiple pieces of cloth.

*Artificial stain A composition containing the following A, B, C, D, and E was used as artificial stain. Each mass % is the proportion in the artificial stain of the final composition, and the amount of B was adjusted so that the total was 100 mass %. A: Adjustment oil (mass% in artificial stain: 0.44% by mass of lauric acid, 3.15% by mass of myristic acid, 2.35% by mass of pentadecanoic acid, 6.31% by mass of palmitic acid, 0.0% by mass of heptadecanoic acid. 44% by mass, stearic acid 1.6% by mass, oleic acid 7.91% by mass, triolein 13.33% by mass, n-hexadecyl palmitate 2.22% by mass, and squalene 6.66% by mass. )
B: Hard water obtained by weighing 105 mg of calcium chloride (dihydrate) and dissolving it in distilled water to make 1,000 ml C: Egg white lecithin liquid crystal 1.98% by mass (11.37 g of arginine hydrochloride, histidine in 80 ml of distilled water) After dissolving 4.20 g of serine and 2.44 g of serine and adjusting the pH to 5.0 with concentrated hydrochloric acid, this solution and egg white lecithin were thoroughly mixed in a mixer to obtain an egg white lecithin liquid crystal product) D: Kanuma red clay 8. 11% by mass
E: Carbon black 0.025% by mass

<Coating and cleaning conditions>
Four pieces of artificially contaminated cloth were used, and 0.2 g of the liquid laundry detergent composition was directly applied to each piece. Four contaminated cloths coated with a liquid detergent composition for clothing were placed in 1 L of hard water with a calcium carbonate equivalent of 179 mg/L (this hard water corresponds to 10° DH on the German hardness scale), and the following results were measured using a tergotometer: Washed under the following conditions.
Soaking time: 30 minutes, washing time: 3 minutes, rotation speed: 180 rpm
Water temperature 30℃
The cleaning power was determined by measuring the reflectance at 550 nm of the original cloth before and after contamination using a colorimeter (Z-300A manufactured by Nippon Denshoku Co., Ltd.), and the cleaning rate (%) was determined using the following formula. . The cleaning rate of each of the four contaminated cloths was determined, and the average value is shown in the table. In this evaluation, it is desirable that the cleaning rate is 50% or more.
Cleaning rate (%) = 100 × [(Reflectance after cleaning - Reflectance before cleaning) / (Reflectance of original fabric - Reflectance before cleaning)]

(2) Solubility evaluation The liquid cleaning composition for clothing shown in Table 1 was colored by adding 0.0005% by mass of a dye (Red No. 106). 100 ml of ion-exchanged water at 30° C. was added to a 200 ml glass beaker, and the mixture was stirred using a stirrer at a rotation speed of 150 pm. 10 g of the above-mentioned colored liquid detergent composition for clothing was added to the stirring state. The mixture was collected after 1 minute and 10 minutes. The absorbance (570 nm) of the collected water was measured using a microplate reader (manufactured by TECAN). The dissolution rate is defined below. In this evaluation, it is desirable that the dissolution rate is 80% or more.
Dissolution rate (%) = 100 × [(Absorbance after 1 minute - Absorbance of ion-exchanged water) / (Absorbance after 10 minutes - Absorbance of ion-exchanged water)]

Claims (13)

(a) surfactant [hereinafter referred to as component (a)] from 7 % by mass to 30% by mass, water at least 50% by mass, and optionally (b) an inorganic salt [hereinafter referred to as component (b)]. Contains
(a) component is one or more surfactants selected from anionic surfactants, nonionic surfactants, amphoteric surfactants, and cationic surfactants,
Contains an anionic surfactant as component (a), the proportion of the anionic surfactant in component (a) is 75% by mass or more,
(a) contains polyoxyalkylene alkyl ether sulfate or a salt thereof as component;
In the component (a), the proportion of polyoxyalkylene alkyl ether sulfate or its salt is 75% by mass or more,
(b) Contains 10 % by mass or less of the component,
η 0.1 /η 100, which is the ratio of the viscosity η _0.1 at a shear rate of 0.1 S ⁻¹ at 30° _C. to the viscosity η ₁₀₀ at a shear rate of ₁₀₀ S ⁻¹ at 30° C., is 1.5 or more and 30 or less. ,
G' 100 /G'' _{100 ,} which is the ratio between storage modulus G' ₁₀₀ and loss modulus G'' ₁₀₀ at an angular frequency of 100 rad/s, is 1 or more;
G' 1.0 /G'' 1.0, which is the ratio between the _storage modulus G' _1.0 and the loss modulus G _' ' _1.0 at an angular frequency of 1.0 rad/s, is less than 1;
Liquid detergent composition for clothing. The liquid detergent composition for clothing according to claim 1 , which contains component (b) in an amount of 2% by mass or more and 20% by mass or less. The liquid detergent composition for clothing according to claim 1 or 2 , containing as component (b) one or more inorganic salts selected from inorganic sulfates and inorganic chlorides. The liquid detergent composition for clothing according to any one of claims 1 to 3 , which contains sodium sulfate as component (b). The clothing according to any one of claims 1 to 4 , which contains sodium sulfate as component (b) and one or more inorganic salts selected from magnesium sulfate, lithium chloride, and sodium chloride. Liquid cleaning composition for use. 6. The mass ratio of the content of the component (a) to the content of the component (b) (a)/(b) is 1 or more and 15 or less, according to any one of claims 1 to 5 . Liquid detergent composition for clothing. The liquid detergent composition for clothing according to any one of claims 1 to 6 , which has a pH of 8 or more and 11 or less at 30°C. The liquid detergent composition for clothing according to any one of claims 1 to 7 , which is for hand washing. The liquid detergent composition for clothing according to any one of claims 1 to 8 , which is of a spreadable type. (a) A component containing a surfactant [hereinafter referred to as component (a)] and water is mixed to contain component (a), water, and optionally (b) an inorganic salt [hereinafter referred to as component (b)]. A method for producing a liquid detergent composition for clothing, comprising:
Using component (a) in an amount of 7 % by mass or more and 30% by mass or less of the total amount of the components to be mixed,
Using water in an amount of 50% by mass or more based on the total amount of the components to be mixed,
(b) component is used in an amount of 10 % by mass or less based on the total amount of the components to be mixed,
As component (a), one or more surfactants selected from anionic surfactants, nonionic surfactants, amphoteric surfactants, and cationic surfactants are used,
An anionic surfactant is used as the component (a), and the proportion of the anionic surfactant in the component (a) is 75% by mass or more,
(a) Using a polyoxyalkylene alkyl ether sulfate or a salt thereof as the component,
In the component (a), the proportion of polyoxyalkylene alkyl ether sulfate or its salt is 75% by mass or more,
By adjusting the types and amounts of the components to be mixed, the resulting liquid detergent composition for clothing can be obtained as shown in (I) to (III) below.
(I) η 0.1 /η 100, which is the ratio of the viscosity η _0.1 at a shear rate of 0.1 S ⁻¹ at 30°C to the viscosity η ₁₀₀ at a shear rate of ₁₀₀ S ⁻¹ at 30° C., is _1.5 or more and 30 Hereinafter, (II) G' 100 _/ G'' ₁₀₀ , which is the ratio between the storage modulus G' ₁₀₀ and the loss modulus G'' ₁₀₀ at an angular frequency of 100 rad/s, is 1 or more;
(III) _G ' 1.0 /G'' 1.0, which is the ratio of storage elastic modulus G' _1.0 and loss elastic modulus G _' ' _1.0 at an angular frequency of 1.0 rad/s, is less than 1;
to satisfy
A method for producing a liquid detergent composition for clothing. A method for washing clothing, comprising washing clothing with the liquid clothing detergent composition according to any one of claims 1 to 9 . The method for washing clothing according to claim 11 , wherein the clothing is washed after applying the liquid clothing cleaning composition to the clothing. The method for cleaning clothing according to claim 11 or 12 , wherein the liquid cleaning agent composition for clothing is applied to clothing, and the applied area is washed by hand.