JP7839773B2 - Powder detergent composition - Google Patents

Description

This invention relates to a powder detergent composition.

Household cleaning agents are used in various places and situations in the living environment, and therefore target a wide range of dirt, from easily removed dirt such as dust and food spills to extremely difficult-to-remove dirt such as tarnished oil stains. For example, tarnished oil stains around the kitchen require strong alkaline cleaning power, while for floors with lighter dirt loads, a cleaner with a lower surfactant concentration is needed, resulting in a cleaner that does not leave an unpleasant slimy feeling or foam residue. Satisfying all of these diverse usage requirements is not easy. Furthermore, there are two main methods for cleaning textile products such as clothing: hand washing and machine washing using washing machines, etc. In recent years, the spread of washing machines has been increasing in Asia, but hand washing remains widespread due to cleaning power, economics, cultural background, and laundry attitudes. Hand washing is suitable not only for removing general dirt attached to fibers, but also for removing stubborn dirt, such as organic dirt such as sebum attached to collars, and inorganic dirt such as mud attached to socks, because the worker can check how well the dirt is being removed while washing. In hand washing, many workers use detergents, such as powdered detergents, dissolved in water to clean textiles. However, in addition to high cleaning power, a smooth feel—that is, a pleasant cleaning sensation—is also required, making hand washing and brushing easier. Furthermore, not only is good rinsing (i.e., easy removal of foam) important, but the absence of unpleasant sensations such as sliminess, similar to hard surfaces, is also a requirement.

Patent Document 1 contains (a) the following structural formula (I): ^R1 -O-(EO) _m - _SO3 -M ⁺ [wherein ^R1 is a linear or branched alkyl group or alkenyl group of C8 to C18, m is 0.5 to 4 on average (however, m=0 is 50% by weight or less), EO is an ethylene oxide group, and M ⁺ represents a sodium ion or a potassium ion. A powder detergent composition is disclosed that contains (a) 12 to 30% by weight of an anionic surfactant represented by (a), (b) 1 to 9% by weight of a polyoxyalkylene-type nonionic surfactant with an HLB of 9 to 16, (c) 5 to 50% by weight of zeolite, and (d) 5 to 50% by weight of alkali metal carbonate, with a weight ratio of (a) to (b) of (a)/(b) = 5.7/4.3 to 9.67/0.33, exhibiting extremely high cleaning power against dirt attached to clothing, while also having an extremely high effect in preventing re-soiling of mud and carbon stains.

Patent Document 2 discloses a powder detergent composition for clothing that contains the following components: (a) at a concentration of 3% to 30% by mass, (b) at a concentration of 30% to 80% by mass, and (c) at a concentration of 0% to 10% by mass, wherein the mass ratio of the content of component (b1) to the total content of components (b1) and (b2), i.e., (b1)/[(b1) + (b2)], is 0.4 or more and 1 or less, and which has excellent solubility in water, high cleaning power against food-derived oil stains, and is suitable for comfortable hand washing.
(a) Component: Anionic surfactant (b) Component: One or more compounds selected from the following components (b1) and (b2) (b1) Component: One or more compounds selected from potassium sulfate and potassium chloride (b2) Component: One or more compounds selected from sodium sulfate and sodium chloride (c) Component: One or more alkaline agents selected from alkali metal carbonates, alkali metal bicarbonates, alkali metal silicates and tripolyphosphates

Patent Document 3 discloses a free-flowing fine particle laundry detergent composition that improves the cleaning performance and fragrance performance of laundry detergent powder products, comprising (a) (i) 0.5 wt% to 20 wt% of AES particles containing 40 wt% to 60 wt% of partially ethoxylated alkyl sulfate-based anionic cleaning surfactant.

Japanese Patent Publication No. 2005-213489 Japanese Patent Publication No. 2017-14497 U.S. Patent Application Publication No. 2016/0289598

As described above, for both hard surface and textile product applications, detergent compositions must possess both high cleaning and high rinsability. Furthermore, detergent compositions that also eliminate a feeling of cleanliness and stickiness are preferred. However, while powder detergent compositions are advantageous for achieving high cleaning and a clean feeling, there is a trade-off relationship where both rinsability and stickiness deteriorate when the amount of anionic surfactants and alkaline agents is high, posing a challenge.

The present invention provides a powder detergent composition that achieves both excellent cleaning and rinsing properties, particularly for heat-modified oil stains or sebum stains, while also providing a good cleaning feel and suppressing a sticky feeling.
In this invention, "cleaning sensation" is defined as the performance that makes the target surface easier to clean by reducing the coefficient of friction between the hand or brush and the target surface when performing hand washing or brush washing, thereby making the target surface slippery.

The present invention contains 12% by mass or less of component (A) below and 3% by mass or more and 10% by mass or less of component (B) below.
The mass ratio (a1)/(A) of the content of component (a1) below to the content of component (A) is 0.16 or more and 0.70 or less.
The present invention relates to a powder detergent composition in which the mass ratio (a1)/(B) of the content of component (a1) to the content of component (B) is 0.2 or more and 2.0 or less.
(A) Component: Anionic surfactant containing the following component (a1) Component (a1): A compound represented by the following general formula (a1) R ^1a -O-(AO) _n - _SO3M (a1)
[In the formula, ^R1a is an aliphatic hydrocarbon group having 10 to 18 carbon atoms, AO is an alkylene oxy group having 2 to 3 carbon atoms, n is the average number of moles of AO added, a number between 1 and 20, and M is a cation.]
(B) Components: One or more alkaline agents selected from inorganic carbonates and inorganic bicarbonates.

According to the present invention, a powder detergent composition is provided that achieves both excellent cleaning properties, particularly for heat-modified oil stains or sebum stains, and good rinsing properties, while also providing a good cleaning sensation and suppressing a sticky feeling.

The reason why the powder detergent composition of the present invention achieves both excellent cleaning performance, particularly for heat-denatured oil stains or sebum stains, and good rinsing performance, while also providing a good cleaning feel and suppressing a sticky feeling, is not entirely clear, but is presumed to be as follows. To achieve both excellent cleaning performance and good rinsing performance, it is essential to include a certain amount of component (a1), which has excellent cleaning performance but poor rinsing performance, and component (A), which contains it. If a large amount of soda ash is added to resolve this trade-off, the cleaning feel and sticky feeling will deteriorate. Therefore, in the present invention, by controlling the optimal mass ratio (a1)/(A) and mass ratio (a1)/(B), it is possible to provide a powder detergent composition that satisfies all four elements. Furthermore, regarding the mechanism by which component (a1) produces a clean feeling, it is presumed that component (A) combines with hardness components in tap water to form a scum of component (A), reducing the inherent slipperiness of component (A). However, by including component (a1) as component (A), the scum formation of component (A) is suppressed, and the slipperiness is restored, resulting in a good clean feeling. Also, regarding the mechanism by which component (B) worsens the slippery feeling, it is presumed that a large amount of component (B) makes the cleansing solution alkaline, promoting the swelling of the stratum corneum of human skin, which is perceived as slipperiness on the hands. Therefore, it is necessary to limit the amount of component (B) contained.

[Powdered detergent composition]
<(A) Ingredients>
The powder detergent composition of the present invention contains an anionic surfactant as component (A), which includes the following component (a1).
(a1) Component: Compound represented by the following general formula (a1) R ^1a -O-(AO) _n - _SO3M (a1)
[In the formula, ^R1a is an aliphatic hydrocarbon group having 10 to 18 carbon atoms, AO is an alkylene oxy group having 2 to 3 carbon atoms, n is the average number of moles of AO added, a number between 1 and 20, and M is a cation.]

In component (a1), in general formula (a1), R ^1a is an aliphatic hydrocarbon group having 10 or more carbon atoms, preferably 12 or more, and 18 or less, preferably 16 or less, preferably an alkyl group or alkenyl group, more preferably an alkyl group, from the viewpoint of cleaning performance, particularly cleaning performance of heat-modified oil stains or sebum stains. AO is preferably an ethylene oxy group. n is 1 or more, preferably 2 or more, more preferably 3 or more, and 20 or less, preferably 15 or less, more preferably 10 or less, from the viewpoint of cleaning performance, particularly cleaning performance and cleaning sensation of heat-modified oil stains or sebum stains.
M is a cation, and examples of cations include alkali metal ions such as sodium ions and potassium ions; alkaline earth metal ions such as calcium ions and magnesium ions; ammonium ions; and alkanolammonium ions having 1 to 3 alkanol groups with 2 or 3 carbon atoms (e.g., monoethanolammonium ions, diethanolammonium ions, triethanolammonium ions, triisopropanolammonium ions, etc.).

From the viewpoint of rinsability and powder formulation, the powder detergent composition of the present invention preferably further contains the following component (a2) as component (A).
(a2) Component: Anionic surfactant having a sulfonic acid group or a salt thereof

(a2) Examples of components include alkylbenzene sulfonic acid, olefin sulfonic acid, alkane sulfonic acid, alkyl or alkenyl sulfosuccinate esters, and one or more anionic surfactants selected from salts thereof.
The number of carbon atoms in the alkyl or alkenyl group of these anionic surfactants is, for example, between 8 and 22 carbon atoms.
Examples of counterions to the anionic groups of these anionic surfactants include alkali metal ions such as sodium ions and potassium ions; alkaline earth metal ions such as calcium ions and magnesium ions; ammonium ions; and alkanolammonium ions having one to three alkanol groups with two or three carbon atoms (e.g., monoethanolammonium ions, diethanolammonium ions, triethanolammonium ions, triisopropanolammonium ions, etc.).

Component (a2) is preferably alkylbenzenesulfonic acid or a salt thereof, from the viewpoint of further improving rinseability when used in combination with component (a1) and from the viewpoint of ease of powder formulation.
From the viewpoint of cleanability, the number of carbon atoms in the alkyl group of alkylbenzenesulfonic acid is 8 or more, preferably 10 or more, and 22 or less, preferably 20 or less, more preferably 18 or less, even more preferably 16 or less, and even more preferably 14 or less, and the alkyl group is preferably linear.

From the viewpoint of rinsability, the powder detergent composition of the present invention preferably further contains the following component (a3) as component (A).
(a3) Components: Alkyl or alkenyl sulfate esters or salts thereof (excluding those that fall under component (a1))

(a3) The number of carbon atoms in the alkyl or alkenyl group of component (a3) is 8 or more, preferably 10 or more, and 22 or less, preferably 20 or less, more preferably 18 or less, even more preferably 16 or less, and even more preferably 14 or less, from the viewpoint of cleanability.
(a3) From the viewpoint of cleaning properties, the component is preferably an alkyl sulfate ester or a salt thereof, in which the alkyl group has 10 to 18 carbon atoms.
(a3) Examples of counterions to the anionic group of component include alkali metal ions such as sodium ions and potassium ions; alkaline earth metal ions such as calcium ions and magnesium ions; ammonium ions; and ammonium ions having 1 to 3 alkanol groups with 2 or 3 carbon atoms (e.g., monoethanolammonium ions, diethanolammonium ions, triethanolammonium ions, triisopropanolammonium ions, etc.).

<(B) component>
The powder detergent composition of the present invention contains one or more alkaline agents selected from inorganic carbonates and inorganic bicarbonates as component (B).

Specific examples of inorganic carbonates include one or more inorganic carbonates selected from monovalent or divalent metal carbonates and ammonium carbonate. Examples of monovalent metal carbonates include alkali metal carbonates, more specifically, one or more compounds selected from sodium carbonate, potassium carbonate, and lithium carbonate. Examples of divalent metal carbonates include alkaline earth metal carbonates, more specifically, magnesium carbonate.

Specific examples of inorganic bicarbonates include one or more inorganic bicarbonates selected from monovalent or divalent metal bicarbonates and ammonium bicarbonate. Examples of monovalent metal bicarbonates include alkali metal bicarbonates, more specifically, one or more compounds selected from sodium bicarbonate, potassium bicarbonate, and lithium bicarbonate. Examples of divalent metal bicarbonates include alkaline earth metal bicarbonates, more specifically, magnesium bicarbonate.

(B) Component is preferably sodium carbonate and one or more selected from potassium carbonate, sodium bicarbonate, and potassium bicarbonate, from the viewpoint of cleaning properties, particularly cleaning properties for heat-denatured oil stains or sebum stains, and from the viewpoint of powder formulation, and more preferably sodium carbonate and one or more selected from potassium carbonate.

<Composition, etc.>
The powder detergent composition of the present invention contains component (A) in an amount preferably 4% by mass or more, preferably 5% by mass or more, more preferably 6% by mass or more, even more preferably 8% by mass or more, and 12% by mass or less, preferably 11% by mass or less, and more preferably 10% by mass or less, from the viewpoint of detergent properties, particularly detergent properties and rinsability for heat-modified oil stains or sebum stains. Furthermore, from the viewpoint of being a suitable detergent composition that can be used for both hard surfaces and textile products as described later, the powder detergent composition of the present invention contains component (A) in an amount preferably 11% by mass or less, more preferably 10% by mass or less, and preferably 7% by mass or more, and more preferably 9% by mass or more.
In the present invention, the mass of component (A) shall be the value converted to its sodium salt equivalent. Similarly, the masses of components (a1), (a2), and (a3) contained in component (A) shall also be the values converted to their sodium salt equivalents. Furthermore, the components may be included in the powder detergent composition of the present invention by blending component (a1), any component (a2), or any component (a3).

In the powder detergent composition of the present invention, the mass ratio (a1)/(A) of the content of component (a1) to the content of component (A) is 0.16 or higher, preferably 0.20 or higher, more preferably 0.25 or higher, and 0.70 or lower, preferably 0.65 or lower, from the viewpoint of cleaning performance, particularly cleaning performance of heat-denatured oil stains or sebum stains, rinsability, and cleaning feel.

In the powder detergent composition of the present invention, when component (A) contains component (a2), the mass ratio (a2)/(A) of the content of component (a2) to the content of component (A) is preferably 0.3 or higher, more preferably 0.35 or higher, preferably 0.84 or lower, more preferably 0.8 or lower, and even more preferably 0.75 or lower, from the viewpoint of cleaning performance, particularly cleaning performance of heat-denatured oil stains or sebum stains, rinsability, cleaning feel, and powder formulation.

The powder detergent composition of the present invention contains component (B) in an amount of 3% by mass or more, preferably 4% by mass or more, more preferably 4.5% by mass or more, and 10% by mass or less, preferably 9% by mass or less, more preferably 8% by mass or less, even more preferably 7% by mass or less, and even more preferably 6% by mass or less, from the viewpoint of cleaning performance, particularly cleaning performance of heat-denatured oil stains or sebum stains and removal of slipperiness.

In the powder detergent composition of the present invention, the mass ratio (a1)/(B) of the content of component (a1) to the content of component (B) is 0.2 or more, preferably 0.3 or more, more preferably 0.4 or more, even more preferably 0.6 or more, and 2.0 or less, preferably 1.5 or less, even more preferably 1.2 or less, and even more preferably 1.0 or less, from the viewpoint of cleaning performance, particularly cleaning performance of heat-denatured oil stains or sebum stains, suppression of slipperiness, and cleaning sensation.

In the powder detergent composition of the present invention, when component (A) contains component (a2), the mass ratio (a2)/(B) of the content of component (a2) to the content of component (B) is preferably 0.5 or higher, more preferably 0.6 or higher, even more preferably 0.7 or higher, and preferably 2.5 or lower, more preferably 2.0 or lower, even more preferably 1.5 or lower, even more preferably 1.1 or lower, and even more preferably 0.9 or lower, from the viewpoint of cleaning performance, particularly cleaning performance of heat-denatured oil stains or sebum stains, cleaning feel, rinsability, and suppression of slipperiness.

The powder detergent composition of the present invention may contain surfactants other than component (A) to the extent that they do not impair the effects of the present invention.
In the powder detergent composition of the present invention, the total surfactant content is preferably 5% by mass or more, more preferably 7% by mass or more, even more preferably 9% by mass or more, and preferably 13% by mass or less, more preferably 12% by mass or less, and even more preferably 11% by mass or less, from the viewpoint of cleaning performance and rinsability.
In the powder detergent composition of the present invention, the mass ratio (A)/(total surfactant) of the content of component (A) to the content of total surfactant is preferably 0.60 or higher, more preferably 0.70 or higher, even more preferably 0.80 or higher, and preferably 1.0 or lower, more preferably 0.95 or lower, and even more preferably 0.90 or lower, from the viewpoint of cleaning performance, particularly cleaning and rinsing performance of heat-denatured oil stains or sebum stains, and powder formulation.

The powder detergent composition of the present invention may contain, as component (C), a polymer having a carboxylic acid group or a salt thereof and a weight-average molecular weight of 3000 or more, from the viewpoint of cleaning performance, particularly the cleaning performance of heat-modified oil stains or sebum stains, and powder formulation.

Component (C) includes one or more selected from polyacrylic acid or its salts, polymers selected from acrylic acid-maleic acid copolymers or their salts (hereinafter referred to as component (c1)), and carboxymethylcellulose or its salts (hereinafter referred to as component (c2)).
Examples of polyacrylic acid or its salts include polyacrylic acid, sodium polyacrylate, potassium polyacrylate, and the like, with sodium polyacrylate and potassium polyacrylate being preferred.
Examples of acrylic acid-maleic acid copolymers or their salts include acrylic acid-maleic acid copolymers, sodium salts of acrylic acid-maleic acid copolymers, potassium salts of acrylic acid-maleic acid copolymers, and preferably sodium salts of acrylic acid-maleic acid copolymers and potassium salts of acrylic acid-maleic acid copolymers. The molar ratio of the acrylic acid-maleic acid copolymer is preferably 1/99 or more, more preferably 10/90 or more, and preferably 99/1 or less, and more preferably 90/10 or less, as expressed as the number of moles of acrylic acid/the number of moles of maleic acid.

Component (c1) may be a copolymer containing monomers other than acrylic acid and maleic acid that are copolymerizable with acrylic acid and/or maleic acid, as long as they do not hinder the expression of the effects of the present invention. Examples of monomers other than acrylic acid and maleic acid that are copolymerizable with acrylic acid and/or maleic acid include vinyl monomers, acrylic monomers, styrene monomers, etc., and more specifically, examples include methacrylic acid, methyl acrylate, ethyl acrylate, methyl methacrylate, styrene, etc. The molar ratio of monomers other than acrylic acid and maleic acid that are copolymerizable with acrylic acid and/or maleic acid in component (c1) is preferably 0 mol% or more, preferably 5 mol% or less, more preferably 3 mol% or less, and even more preferably 0 mol%. Therefore, the polyacrylic acid or its salt, and the copolymer or salt of acrylic acid and maleic acid according to the present invention may be polymers or copolymers that contain, in the range of 0 mol% to 5 mol% of monomers other than acrylic acid and maleic acid, monomers copolymerizable with acrylic acid and/or maleic acid.

The weight-average molecular weight of component (c1) is 3000 or more, preferably 5000 or more, more preferably 8000 or more, and preferably 100000 or less, more preferably 50000 or less, and even more preferably 20000 or less.
The weight-average molecular weight of component (c2) is 100,000 or more, preferably 300,000 or more, and 2,000,000 or less, preferably 1,000,000 or less, and more preferably 500,000 or less.
The degree of etherification of component (c2) is 0.1 or higher, preferably 0.3 or higher, and 0.8 or lower, preferably 0.6 or lower.
This weight-average molecular weight can be measured according to the weight-average molecular weight measurement method described below.
<Method for measuring weight-average molecular weight>
(c) The weight-average molecular weight of component (c) can be measured by GPC (gel permeation chromatography), and the weight-average molecular weight (Mw) can be determined using a conversion standard substance.
The GPC measurement conditions are shown below.
• Column: Manufactured by Tosoh Corporation, product name: TSK-GEL guard PWXL
Manufactured by Tosoh Corporation, Product name: TSK-GEL G4000 PWXL
Manufactured by Tosoh Corporation, Product name: TSK-GEL G2500 PWXL
Mobile phase: 0.1 mol/L potassium phosphate dihydrogen aqueous solution / 0.1 mol/L sodium dihydrogen phosphate aqueous solution / acetonitrile = 90 / 10 (volume ratio)
• Detector: Differential refractive index detector • Column temperature: 40°C
・Flow rate: 1.0mL/min
• Conversion reference material: Polyacrylic acid [manufactured by American Standard Corporation]
Sample: An aqueous polymer solution containing 0.8 g of solids is mixed with deionized water to prepare a total volume of 200 mL. 10 μL of this prepared solution is then taken and injected into the column.

If the powder detergent composition of the present invention contains component (C), component (C) is preferably contained in an amount of 0.1% by mass or more, more preferably 0.2% by mass or more, even more preferably 0.3% by mass or more, and preferably 1.0% by mass or less, more preferably 0.8% by mass or less, and even more preferably 0.6% by mass or less, from the viewpoint of cleaning performance, particularly cleaning performance of heat-denatured oil stains or sebum stains, and powder formulation.
In this invention, the mass of component (C) shall be the value converted to the sodium salt.

The powder detergent composition of the present invention may contain an alkali metal silicate as component (D) from the viewpoint of its cleaning ability, particularly its ability to clean heat-modified oil stains or sebum stains, and its ability to be formulated as a powder.
Examples of alkali metal silicates include sodium silicate and potassium silicate.

When the powder detergent composition of the present invention contains component (D), component (D) is preferably contained in an amount of 2% by mass or more, more preferably 4% by mass or more, even more preferably 6% by mass or more, even more preferably 8% by mass or more, and preferably 16% by mass or less, more preferably 14% by mass or less, even more preferably 12% by mass or less, and even more preferably 10% by mass or less, from the viewpoint of cleaning performance, particularly cleaning performance of heat-denatured oil stains or sebum stains, and powder formulation.

The powder detergent composition of the present invention may contain one or more compounds selected from inorganic sulfates and inorganic halogen compounds as component (E). Examples of component (E) include one or more compounds selected from sodium sulfate, magnesium sulfate, sodium chloride, and magnesium chloride. Component (E) may be in hydrate or anhydrous form.

The powder detergent composition of the present invention, when containing component (E), contains component (E) in an amount of preferably 30% by mass or more, more preferably 40% by mass or more, even more preferably 50% by mass or more, and preferably 90% by mass or less, more preferably 85% by mass or less, and even more preferably 80% by mass or less.

The powder detergent composition of the present invention may contain water. The water used can be deionized water (sometimes called ion-exchanged water) or water to which sodium hypochlorite has been added at a concentration of 1 mg/kg to 5 mg/kg. Tap water can also be used.
If the powder detergent composition of the present invention contains water, it preferably contains 0.01% by mass or more, more preferably 0.1% by mass or more, even more preferably 1% by mass or more, and preferably 15% by mass or less, more preferably 10% by mass or less, and even more preferably 5% by mass or less.

The powder detergent composition of the present invention may contain, as other components, other components known in the fields of powder detergents for hard surfaces and powder detergents for textile products, such as zeolite, bentonite, tripolyphosphate, polyalkylene glycol, bleaching agents (perborate, bleach activators, etc.), anti-redeposition agents, reducing agents (sulfites, etc.), fluorescent whitening agents (e.g., Chinopearl CBS (trade name, manufactured by Ciba Specialty Chemicals) and Whitex SA (trade name, manufactured by Sumitomo Chemical Co., Ltd.), etc.), anti-foaming agents (silicone, etc.), organic solvents, enzymes (cellulase, protease, peptinase, lipase, dextranase, amylase, etc.), fragrances, colorants, etc. (except for those corresponding to components (A) to (E)).

When 1 g of the powder detergent composition of the present invention is diluted to 1000 g with deionized water, the pH at 25°C is preferably 9.0 or higher, more preferably 9.5 or higher, even more preferably 9.9 or higher, and preferably 12.0 or lower, more preferably 11.0 or lower, and even more preferably 10.6 or lower, from the viewpoint of cleaning performance, particularly cleaning performance of heat-denatured oil stains or sebum stains and removal of slipperiness.
pH is measured according to the pH measurement method described below.
<Method for measuring pH>
Connect the pH measuring composite electrode (HORIBA glass ground-joint sleeve type) to the pH meter (HORIBA pH/ion meter F-23) and turn on the power. Use saturated potassium chloride aqueous solution (3.33 mol/L) as the internal solution for the pH electrode. Next, fill 100 mL beakers with pH 4.01 standard solution (phthalate standard solution), pH 6.86 (neutral phosphate standard solution), and pH 9.18 standard solution (borate standard solution), and immerse them in a 25°C constant temperature bath for 30 minutes. Immerse the pH measuring electrode in the standard solutions adjusted to constant temperature for 3 minutes and perform calibration in the order of pH 6.86 → pH 9.18 → pH 4.01. Adjust the sample to be measured to 25°C, immerse the electrode of the pH meter in the sample, and measure the pH after 1 minute.

From the viewpoint of usability, the powder detergent composition of the present invention preferably has a bulk density measured by the method specified in JIS K 3362:2008 of 400 g/L or more, more preferably 450 g/L or more, even more preferably 500 g/L or more, and preferably 900 g/L or less, more preferably 800 g/L or less, and even more preferably 700 g/L or less.

The powder detergent composition of the present invention, from the viewpoint of fluidity, preferably has an average particle size of 200 μm or more, more preferably 250 μm or more, even more preferably 300 μm or more, and preferably 650 μm or less, more preferably 600 μm or less, even more preferably 550 μm or less, even more preferably 450 μm or less, and even more preferably 400 μm or less. Here, the average particle size is determined from the mass fraction based on the sieve mesh size after vibrating the powder for 5 minutes using a standard sieve according to JIS Z 8801.

The powder detergent composition of the present invention can be manufactured by known methods. For example, it can be manufactured by spray drying, dry neutralization, dry granulation, dry blending, fluidized bed drying, thin film drying, extrusion granulation, rolling granulation, agitation granulation, compaction granulation, surfactant loading, or a selection and combination thereof.

The powder cleaning agent composition of the present invention can be suitably used for hard surfaces and/or textile products.
Furthermore, the powder cleaning agent composition of the present invention can be suitably used as a multi-purpose cleaner for hard surfaces and textile products.
In particular, the powder detergent composition of the present invention achieves both excellent cleaning properties, especially for heat-modified oil stains or sebum stains, and good rinsing properties, and furthermore, it provides a good cleaning feel and suppresses a slimy feeling, making it suitable for use in hand washing for hard surface cleaning and/or hand washing for textile products. In this invention, hand washing includes not only scrubbing with fingers, but also scrubbing by hand using cleaning aids such as sponges and brushes.

The hard surfaces to be cleaned with the powder detergent composition of the present invention are preferably used for bathrooms, kitchens, or toilets, and more preferably for bathrooms or toilets. Specifically, the powder detergent composition of the present invention can be applied to hard surfaces around bathrooms (walls, floors, bathtubs, etc.) and hard surfaces of products used in bathrooms (bathroom chairs, washbasins, etc.). Furthermore, the powder detergent composition of the present invention can be applied to hard surfaces around kitchens (walls, floors, sinks, etc.) and hard surfaces of products used in kitchens (stoves, microwave ovens, ovens, refrigerators, etc.). Furthermore, the powder detergent composition of the present invention can be applied to hard surfaces in toilets (walls, floors, toilet bowls, etc.) and hard surfaces of products used in toilets (storage shelves, trash cans, etc.).
Furthermore, the powder cleaning agent composition of the present invention can also be applied to hard surfaces such as floors, wooden flooring, windows, motorcycles, and bicycles.
Furthermore, the hard surface material targeted by the powder cleaning agent composition of the present invention may be a hard surface made of one or more materials selected from plastics, ceramics, metals, wood, glass, rubber, and carbon materials.

The fibers to be cleaned with the powder detergent composition of the present invention may be either hydrophobic or hydrophilic. Examples of hydrophobic fibers include protein fibers (milk protein casein fibers, Promix, etc.), polyamide fibers (nylon, etc.), polyester fibers (polyester, etc.), polyacrylonitrile fibers (acrylic, etc.), polyvinyl alcohol fibers (vinylon, etc.), polyvinyl chloride fibers (polyvinyl chloride, etc.), polyvinylidene chloride fibers (vinylidene, etc.), polyolefin fibers (polyethylene, polypropylene, etc.), polyurethane fibers (polyurethane, etc.), polyvinyl chloride/polyvinyl alcohol copolymer fibers (Polycloral, etc.), polyalkylene parahydroxybenzoate fibers (benzoate, etc.), polyfluoroethylene fibers (polytetrafluoroethylene, etc.), glass fibers, carbon fibers, alumina fibers, silicone carbide fibers, rock fibers, slag fibers, metal fibers (gold thread, silver thread, steel fiber), etc. Examples of hydrophilic fibers include seed hair fibers (cotton, cotton, kapok, etc.), bast fibers (hemp, flax, ramie, cannabis, jute, etc.), leaf vein fibers (Manila hemp, sisal, etc.), coconut fibers, rush, straw, animal hair fibers (wool, mohair, cashmere, camel hair, alpaca, vicuña, angora, etc.), silk fibers (domestic silk, wild silk), feathers, and cellulose fibers (rayon, polynosic, cupro, acetate, etc.).
From the viewpoint of finish quality, the fibers are preferably fibers containing cotton fibers. From the viewpoint of washability, particularly the washability of sebum stains, the cotton fiber content in the fibers is preferably 5% by mass or more, more preferably 10% by mass or more, even more preferably 15% by mass or more, even more preferably 20% by mass or more, and preferably 100% by mass or less, more preferably 90% by mass or less, even more preferably 80% by mass or less, and even more preferably 70% by mass or less.

In this invention, "textile products" refers to woven fabrics, knitted fabrics, nonwoven fabrics, and other fabrics using the aforementioned hydrophobic and hydrophilic fibers, as well as products obtained using these fabrics, such as undershirts, T-shirts, dress shirts, blouses, slacks, hats, handkerchiefs, towels, knitwear, socks, underwear, and tights.

[Method for cleaning hard surfaces and/or textile products]
The present invention provides a method for cleaning hard surfaces and/or textile products, which involves cleaning hard surfaces and/or textile products using a cleaning solution (hereinafter referred to as the cleaning solution of the present invention) obtained by mixing the powder cleaning agent composition of the present invention with water.
The hard surfaces and/or textile products to be cleaned are the same as those described in the powder detergent composition of the present invention.
The method for cleaning textile products of the present invention can be appropriately applied to the embodiments described in the description of the powder detergent composition of the present invention.

In the cleaning method for hard surfaces and/or textile products of the present invention, the amount of water used when mixing the powder detergent composition of the present invention with water is adjusted so that, from the viewpoint of cleaning performance, particularly the cleaning and rinsing performance of heat-modified oil stains or sebum stains, the total amount of the powder detergent composition of the present invention per liter of water is preferably 1 g or more, more preferably 2 g or more, even more preferably 4 g or more, and preferably 10 g or less, more preferably 8 g or less, and even more preferably 6 g or less.

In the cleaning method for hard surfaces and/or textile products of the present invention, the water temperature is preferably 10°C or higher, more preferably 20°C or higher, even more preferably 30°C or higher, and preferably 100°C or lower, more preferably 80°C or lower, and even more preferably 60°C or lower, from the viewpoint of cleaning performance.
Furthermore, the temperature of the cleaning solution of the present invention may be within the aforementioned range. Also, the temperature of the water used in the cleaning method, such as the water used for rinsing, may be within the aforementioned range.

The pH of the cleaning solution of the present invention at 25°C is preferably 9.0 or higher, more preferably 9.5 or higher, even more preferably 9.9 or higher, and preferably 12.0 or lower, more preferably 11.0 or lower, and even more preferably 10.6 or lower, from the viewpoint of cleaning performance, particularly the cleaning performance of heat-denatured oil stains or sebum stains and the removal of slipperiness.
The pH shall be measured according to the pH measurement method described in the above-mentioned cleaning agent article.

In the present invention's method for cleaning hard surfaces and/or textile products, when the object to be cleaned is a textile product, the textile product containing the cleaning solution can be hand-washed. Examples of hand-washing methods include hand-rubbing the textile product, pressing the textile product, and rubbing the textile products together by hand.

In the present invention's method for cleaning hard surfaces and/or textile products, when the object to be cleaned is a textile product, the textile product can be washed in a washing machine.
Examples of washing machines include top-loading washing machines, twin-tub washing machines, front-loading washing machines, pulsator washing machines, agitator washing machines, and small washing machines. Each of these washing machines is available commercially for home use.

In the cleaning method for hard surfaces and/or textile products of the present invention, when the object to be cleaned is a textile product, the bath ratio value, expressed as the ratio of the mass (kg) of the textile product to the volume (liters) of the cleaning solution containing the powder cleaning agent composition of the present invention and water, i.e., the value of volume (liters) of the cleaning solution of the present invention / mass (kg) of the textile product, is preferably 8 or higher, more preferably 10 or higher, even more preferably 12 or higher, even more preferably 15 or higher, and preferably 45 or lower, more preferably 40 or lower, even more preferably 30 or lower, and even more preferably 20 or lower, from the viewpoint of cleaning performance and economy.

In the cleaning method for hard surfaces and/or textile products of the present invention, when the object to be cleaned is a textile product, the cleaning time for contacting the powder cleaning agent composition of the present invention with the textile product and water (i.e., the cleaning time for contacting the cleaning solution of the present invention with the textile product) is preferably 1 minute or more, more preferably 3 minutes or more, and even more preferably 5 minutes or more, from the viewpoint of cleaning performance, and preferably 1 hour or less, more preferably 45 minutes or less, and even more preferably 30 minutes or less, from the viewpoint of damaging the textile product.
After washing textile products, they can be rinsed and wrung out. Rinsing and wringing can be done by hand or in a washing machine. Rinsing and wringing can be done alternately multiple times.
After rinsing and dewatering, drying can be performed. Drying can be done by natural drying or heat drying. Multiple drying cycles can be performed for each method.

In the cleaning method for hard surfaces and/or textile products of the present invention, when the object to be cleaned is a hard surface, the cleaning solution of the present invention is brought into contact with the hard surface. Methods for bringing the cleaning solution of the present invention into contact with the hard surface include coating, spraying, or immersion, with coating or spraying being preferred.
After contacting the cleaning solution of the present invention with a hard surface, scrubbing is performed using cleaning aids such as sponges and brushes, or by hand.

In the cleaning method for hard surfaces and/or textile products of the present invention, when the object to be cleaned is a hard surface, the cleaning solution of the present invention is applied or sprayed in a ratio of preferably 1 g ^{or more} , more preferably 3 g or more, even more preferably 5 g or more, preferably 15 g or less, more preferably 12 g or less, and even more preferably 10 g or less, per 100 cm² area of the hard surface of the object, from the viewpoint of cleaning performance, particularly cleaning performance and rinsing performance of heat-modified oil stains or sebum stains.

In the cleaning method for hard surfaces and/or textile products of the present invention, when the object to be cleaned is a hard surface, the time for which the cleaning solution of the present invention is in contact with the hard surface is preferably 10 seconds or more, more preferably 20 seconds or more, even more preferably 30 seconds or more, and still more preferably 40 seconds or more, from the viewpoint of enhancing cleaning power, and similarly preferably 60 minutes or less, more preferably 30 minutes or less, even more preferably 20 minutes or less, and still still more preferably 10 minutes or less. While the cleaning solution of the present invention is in contact with the hard surface, the hard surface may be rubbed with fingers or cleaning aids such as sponges or brushes to apply external force (physical force), or it may be left unattended.
After contacting the hard surface with the cleaning solution of the present invention, and if necessary, after a predetermined contact time, rinse the hard surface with water. When rinsing, the hard surface may be rubbed with fingers or cleaning aids such as sponges or brushes to apply external force (physical force), or it may simply be rinsed with a stream of water.

[Ingredients]
The following components were used in the examples and comparative examples.
<(A) Ingredients>
• ES: Sodium polyoxyethylene lauryl ether sulfate, Emal 270J, manufactured by Kao Corporation, (a1) ingredient • LAS: Sodium laurylbenzenesulfonate, Neoperex G-15, manufactured by Kao Corporation, (a2) ingredient • AS: Sodium lauryl sulfate, Emal 10G, manufactured by Kao Corporation, (a3) ingredient <(B) ingredient>
• Sodium carbonate: Light ash, manufactured by Central Glass Co., Ltd. <(C) component>
Oligomer D: Sodium polyacrylate, manufactured by Kao Corporation, weight-average molecular weight 10,000 <(D) component>
• Crystalline silicate: Sodium silicate, "No. 2 Silicate" manufactured by Fuji Chemical Co., Ltd., 40% purity, the numbers in the table represent the purity values <(E) component>
• Sodium sulfate: Anhydrous neutral sodium sulfate, manufactured by Shikoku Chemicals Co., Ltd. <Other ingredients>
• Bentonite: Kunipia F, manufactured by Kunimine Industries Co., Ltd. • Fluorescent dye: Chinopearl CBS, manufactured by Chiba Specialty Chemicals • Polyethylene glycol: Weight-average molecular weight 13,000, manufactured by SINO-Japan

[Preparation of powder detergent composition]
The above-mentioned components were kneaded to prepare the powder detergent compositions shown in Tables 1 and 2. Specifically, component (A) was pre-freezed and then powdered in a mortar. Components (B), (C), (D), and (E) were similarly powdered using a mortar. These powdered components (A) to (E) were kneaded until uniform, and the other components mentioned above were added and stirred thoroughly to obtain the powder detergent compositions with the formulations shown in Tables 1 and 2. The mass percentages of each component in Tables 1 and 2 are all based on the effective content. The bulk density of each prepared powder detergent composition, as measured by the method specified in JIS K 3362:2008, was 500 to 800 g/L, and the average particle size, calculated from the mass fraction based on the sieve size after vibrating for 5 minutes using a standard sieve according to JIS Z 8801, was 300 μm.
Furthermore, when 1 g of each prepared powder detergent composition was diluted with 1000 g of deionized water, the pH at 25°C was 9.5 to 11.0.

[Example 1, Comparative Example 1: Evaluation for hard surface applications]
<Rinsing performance (foam removal performance) evaluation>
Each powder cleaning agent composition in Table 1 was diluted to 4 g/L using 10°DH hard water, and 20 ml of each cleaning solution was applied to a substrate (material: porcelain tile, product name: POLISHED PORCELAIN TILE, Grade: Premium, color: white, dimensions: 100 mm x 100 mm, manufacturer: Foshan XiangYu Ceramic Co., Ltd.). The substrate was then scrubbed 10 times in one direction for 10 seconds using a brush (product name: Kitchen Brush No. 36, brush width: 4 mm, manufactured by Daiso Industries Co., Ltd.). The level of contamination on the substrate was evaluated in a system without additives. Subsequently, 10 ml of water in a 50 ml beaker was gently poured onto the substrate surface, and the rinsability (foam removal) was visually evaluated according to the evaluation criteria below. The results are shown in Table 1.
• Evaluation Criteria ◎: No bubbles remain on the circuit board.
○: Almost no bubbles remain on the circuit board.
△: Some bubbles remain on the circuit board.

<Evaluation of stickiness>
Each powder detergent composition in Table 1 was diluted to 4 g/L using 10°DH hard water, and 20 ml of each cleaning solution was applied to a substrate (the same substrate used in the rinseability evaluation). The substrate was then scrubbed 10 times in one direction for 10 seconds using a brush (the same brush used in the rinseability evaluation). After that, 10 ml of water from a 50 ml beaker was gently poured onto the substrate surface. Subsequently, five panelists performed the action of rubbing the substrate with their fingers 10 times and evaluated the slipperiness. Table 1 shows the number of panelists who judged the substrate to be non-slippery and slippery. The more panelists who judged the substrate to be non-slippery and slippery, the higher the comfort level of hand washing.

<Evaluation of cleanability>
A substrate (the same substrate used in the rinseability evaluation) was coated with 200 μl of rapeseed oil (manufactured by Wako Pure Chemical Industries, Ltd.), and heated at 150°C for 90 minutes to prepare a substrate with heat-modified oil stains. 20 ml of each cleaning solution, diluted to 4 g/L using 10°DH hard water, was applied to the substrate, and the substrate was scrubbed 10 times in one direction for 10 seconds using a brush (the same brush used in the rinseability evaluation). The substrate was stained with Sudan III (manufactured by Wako Pure Chemical Industries, Ltd., Grade 1), and the gray value was calculated using Image J. The cleaning rate of the modified oil stains was determined according to formula (1). The results are shown in Table 1. A cleaning rate of 70% or higher is preferred.
Cleaning rate (%) = (Gray value (substrate after cleaning) - Gray value (substrate before cleaning)) ÷ (Gray value (substrate before oil application) - Gray value (substrate before cleaning)) ... (1)

<(Ease of Cleaning) Evaluation (Evaluation of how easily the brush glides during brush cleaning)>
Each powder detergent composition in Table 1 was dissolved in water adjusted to a German hardness of 10°dH at a water temperature of 25°C to prepare 1 L of cleaning solution with a concentration of 0.4% by mass of the powder detergent composition. 20 ml of each cleaning solution was applied to a substrate (the same substrate used in the rinseability evaluation), and the substrate was scrubbed 10 times in one direction for 10 seconds using a brush (the same brush used in the rinseability evaluation). The slipperiness of the brush was evaluated sensorily based on the feel of the brush during the cleaning process. Five panelists judged whether they could perceive the brush as slippery, and the number of panelists who judged the brush as slippery is shown in Table 1. The more panelists who judged the brush as slippery, the more comfortable the brush cleaning is considered to be.

[Example 2, Comparative Example 2: Evaluation for Textile Product Applications]
<Rinsing performance (foam removal performance) evaluation>
1. Preparation of artificial sebum-stained cloth and artificial dirt A composition containing A, B, C, D, and E below was prepared to create artificial dirt. The mass percentages for each component represent the proportion in the final artificial dirt composition, and the amount of B was adjusted so that the total mass percentage was 100%.
A: Model sebum stain (Used in amounts such that the mass percentages in the artificial stubble are 0.44% lauric acid, 3.15% myristic acid, 2.35% pentadecanoic acid, 6.31% palmitic acid, 0.44% heptadecanoic acid, 1.6% stearic acid, 7.91% oleic acid, 13.33% triolein, 2.22% n-hexadecyl palmitate, and 6.66% squalene)
B: Hard water obtained by weighing 105 mg of calcium chloride dihydrate and dissolving it in distilled water to make 1,000 mL. C: 1.98% by mass of egg white lecithin liquid crystal (egg white lecithin liquid crystal obtained by dissolving 11.37 g of arginine hydrochloride, 4.20 g of histidine, and 2.44 g of serine in 80 mL of distilled water, adjusting the pH to 5.0 with concentrated hydrochloric acid, and then thoroughly mixing this solution with egg white lecithin in a mixer).
D: Kanuma red clay 8.11% by mass
E: Carbon black 0.025% by mass
- Artificial sebum-stained cloth The artificial sebum-stained cloth used was made by gravure coating a 6cm x 6cm cotton/polyester broadcloth blend dyed cloth (cotton/polyester ratio = 35/65, purchased from Tanigashira Shoten) with 100mg of artificial sebum consisting of the above composition per cloth.

2. Preparation of Mud-Stained Cloth The mud-stained cloth used for evaluation was prepared using the following procedure. This method causes particles to adhere between the fibers through re-soiling, resulting in a more difficult-to-clean cloth than a cloth with mud simply applied to the surface. The mud used was Kanuma horticultural akadama soil, dried at 120°C ± 5°C for 4 hours, then crushed and sieved through a 75 μm sieve. 6 g of mud was added to 1,000 mL of deionized water, stirred, and then subjected to ultrasonic stimulation for 15 minutes. These were transferred to a turgotometer, 15 g of cotton knit cloth (purchased from Tanigashira Shoten, 6 cm x 6 cm) was added, and the mixture was stirred at 20°C, 100 rpm for 20 minutes. After that, it was rinsed with running water for 1 minute, dewatered for 1 minute, and air-dried overnight to prepare the mud-stained cloth.

3. Rinsing Performance (Foam Removal Performance) Evaluation Three liters of model water at a temperature of 30°C were poured into a model circular washbasin (a cylindrical acrylic container with a base diameter (inner diameter) of 25 cm and a height of 15 cm). This model water was prepared by adding calcium chloride and magnesium chloride to ion-exchanged water so that the German hardness was 10°dH (Ca/Mg = 7/3, mass ratio), and then adding sodium bicarbonate to make the alkalinity 60 mg/L, and adjusting the pH to 7 with hydrochloric acid. Next, 12 g of each powder detergent composition from Table 2 was added to this model water and dissolved to prepare a cleaning solution with a concentration of 4% by mass of the powder detergent composition. Three garments for evaluation (100% cotton T-shirts, product name: YG Crew Neck T-shirt, product number: YV0013N, manufactured by Gunze Co., Ltd.) were placed in the cleaning solution in the model circular washbasin and left for 30 minutes, completely submerged in the cleaning solution. After letting it sit, for each garment being evaluated, the fabric soiled with artificial sebum was rubbed for 15 seconds and the fabric soiled with mud for 30 seconds (one rub-back motion counted as one stroke, approximately 1 second). Then, the garments were removed and squeezed out from 10 cm above the basin so that the water content of the garments was approximately 100-140% by mass relative to the garment's weight.
Three liters of the above-mentioned model water at a temperature of 30°C were poured into another model circular washbasin. Three evaluation garments, whose water content had been squeezed out as described above, were placed in the washbasin. After loosening the evaluation garments in the model water, each garment was lifted out of the water bath by holding the collar (lifting it up to a height of approximately 5 cm above the washbasin until the entire garment was removed), and then returned to the water bath. This up-and-down rinsing motion was repeated 10 times for each evaluation garment. After that, the evaluation garments were squeezed out 10 cm above the washbasin so that their water content was approximately 100-140% of that of underwear. The state of the rinse water immediately after rinsing and spinning of the three evaluation garments was observed, and the rinsability was evaluated according to the evaluation criteria below. The results are shown in Table 2.
• Evaluation Criteria ◎: No bubbles remain on the surface of the water in the bucket.
○: There are almost no bubbles on the surface of the water in the bucket.
△: Some foam remains on the surface of the water in the bucket.

<Evaluation of stickiness>
After the rinsing performance (foam removal) evaluation described above, five panelists immersed their hands in each rinse water and rubbed their fingers together 10 times to evaluate the slipperiness of the rinse water. Table 2 shows the number of panelists who judged the rinse water not to be slippery. The more panelists who judged the water to be slippery, the more comfortable hand washing is considered to be.

<Evaluation of cleanability>
Each powder detergent composition in Table 2 was dissolved in water adjusted to a German hardness of 10°dH at a water temperature of 25°C to prepare 1 L of cleaning solution with a concentration of 0.4% by mass of the powder detergent composition. Four fabrics soiled with artificial sebum (the same fabrics used in the rinseability evaluation) were placed in 1 L of the prepared cleaning solution and immersed for 30 minutes. Then, they were washed for 3 minutes at 180 r/min using a targotometer (Ueshima MS-8212, inner diameter 12 cm, height 17.5 cm). After washing, the fabrics were rinsed for 1 minute with the same water used to prepare the cleaning solution. The cleaning power was evaluated based on the cleaning rate (%) calculated using the following formula (1). Specifically, the reflectance of the original fabric before artificial sebum soiling and the fabrics soiled with artificial sebum before and after washing was measured using a colorimeter (Nippon Denshoku Z-300A), and the cleaning rate (%) was determined using the following formula (1). The cleaning rate results represent the average of the calculations performed on four fabrics soiled with artificial sebum. A higher cleaning rate indicates better cleaning performance.
Cleaning rate (%) = 100 × [(Reflectance of artificial sebum-stained fabric after cleaning - Reflectance of artificial sebum-stained fabric before cleaning) / (Reflectance of original fabric - Reflectance of artificial sebum-stained fabric before cleaning)] (1)
The results are shown in Table 2. A cleaning rate of 70% or higher is preferable.

<(Ease of Washing) Evaluation (Evaluation of how easily clothes slide during hand washing)>
Each powder detergent composition in Table 2 was dissolved in water adjusted to a German hardness of 10°dH at a water temperature of 25°C to prepare 3 L of a detergent solution with a concentration of 0.4% by mass of the powder detergent composition. The 3 L of the prepared detergent solution was poured into a tub (diameter 41 cm, depth 14 cm, capacity 11 L, product name: Poly Tub 36, Sekisui Techno Molding Co., Ltd.), and three pieces of evaluation clothing (100% cotton T-shirts, product name: YG Crew Neck T-shirt, product number: YV0013N, manufactured by Gunze Corporation) were added and the garments were hand-kneaded five times each from two directions. The slipperiness of the garments during the hand-kneading was sensory evaluated. Five panelists sensory evaluated whether they could feel the garments were slippery, and the number of panelists who judged the garments to be slippery is shown in Table 2. The more panelists who judged the garments to be slippery, the more comfortable the hand-washing experience is.

Claims (10)

It contains 12% by mass or less of component (A) below, and 3% by mass or more and 10% by mass or less of component (B) below,
The mass ratio (a1)/(A) of the content of component (a1) below to the content of component (A) is 0.16 or more and 0.70 or less.
A powder detergent composition in which the mass ratio (a1)/(B) of the content of component (a1) to the content of component (B) is 0.2 or more and 2.0 or less.
(A) Component: An anionic surfactant containing the following component (a1) Component (a1): A compound represented by the following general formula (a1) R ^1a -O-(AO) _n - _SO3M (a1)
[In the formula, ^R1a is an aliphatic hydrocarbon group having 10 to 18 carbon atoms, AO is an alkylene oxy group having 2 to 3 carbon atoms, n is the average number of moles of AO added, a number between 1 and 20, and M is a cation.]
(B) Components: One or more alkaline agents selected from inorganic carbonates and inorganic bicarbonates. The powder detergent composition according to claim 1, wherein component (A) further comprises component (a2) described below.
(a2) Component: Anionic surfactant having a sulfonic acid group or a salt thereof (A) A powder detergent composition according to claim 1 or 2, containing 5% by mass or more and 12% by mass or less of component (A). (B) The powder detergent composition according to claim 1 or 2 , wherein component (B) is one or more selected from sodium carbonate and potassium carbonate. The powder detergent composition according to claim 1 or 2 , wherein the bulk density measured by the method specified in JIS K 3362:2008 is 400 g/L or more and 900 g/L or less. A powder cleaning agent composition according to claim 1 or 2, for use on hard surfaces and/or textile products. A powder cleaning agent composition according to claim 1 or 2 , for use on hard surfaces. A powder cleaning agent composition according to claim 1 or 2 , for use in bathrooms or toilets. A powder detergent composition according to claim 1 or 2, for use in textile products. A powder cleaning agent composition according to claim 1 or 2, for use on hard surfaces and for use on textile products.