WO2025089290A1 - Powder detergent composition - Google Patents

Abstract

Provided is a powder detergent composition which achieves cleanability, particularly cleanability and rinsability of heat-modified oil stains or sebum stains, has a good cleaning sensation, and is such that sliminess is suppressed.　This powder detergent composition contains 12% by mass or less of component (A) described below, and 3-10% by mass of component (B) described below, wherein the mass ratio (a1)/(A) of the content of component (a1) described below to the content of component (A) is 0.16 to 0.70, and the mass ratio (a1)/(B) of the content of component (a1) to the content of component (B) is 0.2 to 2.0. Component (A): an anionic surfactant containing component (a1) described below Component (a1): a specific sulfuric acid ester, or a salt thereof, having an aliphatic hydrocarbon group and a polyalkyleneoxy group

Description

Powder detergent composition

The present invention relates to a powder detergent composition.

Background Art Household cleaners are used in various places and situations in the living environment, and therefore the dirt they are used to remove varies widely from dirt that is easy to remove, such as dust and food spills, to dirt that is very difficult to remove, such as denatured oil dirt. For example, strong alkaline cleaning properties are required for denatured oil dirt in the kitchen, while for floors with dirt that has a small dirt load, a cleaner that has a lower surfactant concentration and does not leave an unpleasant feeling such as sliminess or foam residue is required, and it is not easy to satisfy all of these versatile usability requirements. In addition, there are two main types of cleaning methods for textile products such as clothing: hand washing and machine washing using a washing machine. In recent years, the popularity of washing machines in Asian regions has been increasing, but hand washing is widely used due to cleaning power, economic efficiency, cultural background, laundry awareness, etc. Hand washing is suitable for cleaning not only the overall dirt attached to the fibers, but also for cleaning difficult-to-remove dirt, for example, organic dirt such as sebum dirt attached to collars and inorganic dirt such as mud attached to socks. In hand washing, many workers wash textile products using detergent, for example, a cleaning solution obtained by dissolving powder detergent in water, but in addition to high cleaning power, workers are also required to have a slippery feeling on the clothes that makes it easy to rub them by hand or wash them with a brush, that is, a clean feeling. In addition to the foam-eliminating property (= rinsing property) during rinsing, it is also required that there is no unpleasant feeling such as sliminess, as with hard surfaces.

JP 2005-213489 A describes (a) a polymer having the following structural formula (I): R ¹ -O-(EO) _m -SO ₃ - M ⁺ (wherein R ¹ is a C8-18 linear or branched alkyl or alkenyl group, m is an average of 0.5 to 4 (with the proviso that m=0 accounts for 50% or less by weight), EO is an ethylene oxide group, and M ⁺ is a sodium ion or a potassium ion). (b) 12 to 30% by weight of an anionic surfactant represented by the formula (a) above, (b) 1 to 9% by weight of a polyoxyalkylene-type nonionic surfactant having an HLB of 9 to 16, (c) 5 to 50% by weight of a zeolite, and (d) 5 to 50% by weight of an alkali metal carbonate, the weight ratio of component (a) to component (b) being (a)/(b)=5.7/4.3 to 9.67/0.33, and the powder detergent composition thus disclosed has an extremely high detergency against stains attached to clothing and at the same time has an extremely high effect of preventing redeposition of muddy stains and carbon stains.

JP 2017-14497 A discloses a powder detergent composition for clothing that contains the following component (a) in an amount of 3% by mass or more and 30% by mass or less, a component (b) in an amount of 30% by mass or more and 80% by mass or less, and a component (c) in an amount of 0% by mass or more and 10% by mass or less, and that has excellent solubility in water, high detergency against oily stains derived from food, and comfortable hand-washing properties.
Component (a): Anionic surfactant; Component (b): One or more compounds selected from the following components (b1) and (b2); Component (b1): One or more compounds selected from potassium sulfate and potassium chloride; Component (b2): One or more compounds selected from sodium sulfate and sodium chloride; Component (c): One or more alkaline agents selected from alkali metal carbonates, alkali metal hydrogen carbonates, alkali metal silicates, and tripolyphosphates.

U.S. Patent Application Publication No. 2016/0289598 discloses a free-flowing particulate laundry detergent composition that (a) contains 0.5 wt% to 20 wt% AES particles containing (i) 40 wt% to 60 wt% of a partially ethoxylated alkyl sulfate anionic cleaning surfactant, and that provides improved cleaning performance and fragrance performance in a laundry detergent powder product.

As described above, for both hard surfaces and textile applications, a detergent composition must have both high detergency and high rinsability, and it is considered preferable that the detergent composition also has a cleaning feel and eliminates stickiness. However, while a powder detergent composition is advantageous for achieving high detergency and cleaning feel, when the content of an anionic surfactant or an alkaline agent is high, there is a trade-off between the deterioration of both rinsability and stickiness, which is problematic.

The present invention provides a powder detergent composition which has both good cleaning properties, particularly for cleaning heat-denatured oily stains or sebum stains, and good rinsing properties, and further has a good cleaning feel and reduced sticky feeling.
In the present invention, the cleaning feel is defined as the ability to reduce the coefficient of friction between the hand or brush and the target surface when kneading or washing with a brush, making the target surface slippery and giving the user the impression that it is easy to clean.

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

The present invention also provides a composition comprising the following component (A) in an amount of 5% by mass or more and 12% by mass or less, and the following component (B) in an amount of 3% by mass or more and 10% by mass or less:
a mass ratio (a1)/(A) of the content of the following component (a1) to the content of the component (A) is 0.16 or more and 0.70 or less,
the mass ratio (a1)/(B) of the content of the component (a1) to the content of the component (B) is 0.2 or more and 2.0 or less;
The powder detergent composition includes a powder detergent composition having a sodium carbonate content of 3% by mass or more and 9% by mass or less as the component (B).
Component (A): Anionic surfactant containing the following component (a1) and component (a2): Component (a1): A compound represented by the following general formula (a1): R ^1a -O-(AO) _n -SO ₃ M (a1)
[In the formula, R ^1a is an aliphatic hydrocarbon group having 10 to 18 carbon atoms, AO is an alkyleneoxy group having 2 to 3 carbon atoms, n is the average number of moles of AO added and is a number of 1 to 20, and M is a cation.]
Component (a2): Anionic surfactant having a sulfonic acid group or a salt thereof Component (B): One or more alkaline agents selected from sodium carbonate and potassium carbonate

The present invention also provides a composition comprising the following component (A) in an amount of 5% by mass or more and 12% by mass or less, and the following component (B) in an amount of 3% by mass or more and 10% by mass or less:
a mass ratio (a1)/(A) of the content of the following component (a1) to the content of the component (A) is 0.16 or more and 0.70 or less,
the mass ratio (a1)/(B) of the content of the component (a1) to the content of the component (B) is 0.2 or more and 2.0 or less;
the component (B) contains sodium carbonate, and the content of sodium carbonate in the powder detergent composition is 3% by mass or more and 9% by mass or less;
The present invention relates to a powder detergent composition having a bulk density of 400 g/L or more and 900 g/L or less, as measured by the method specified in JIS K 3362:2008.
Component (A): Anionic surfactant containing the following component (a1) and component (a2): Component (a1): A compound represented by the following general formula (a1): R ^1a -O-(AO) _n -SO ₃ M (a1)
[In the formula, R ^1a is an aliphatic hydrocarbon group having 10 to 18 carbon atoms, AO is an alkyleneoxy group having 2 to 3 carbon atoms, n is the average number of moles of AO added and is a number of 1 to 20, and M is a cation.]
Component (a2): Anionic surfactant having a sulfonic acid group or a salt thereof Component (B): One or more alkaline agents selected from sodium carbonate and potassium carbonate

The present invention also provides a composition comprising the following component (A) in an amount of 5% by mass or more and 12% by mass or less, and the following component (B) in an amount of 3% by mass or more and 10% by mass or less:
a mass ratio (a1)/(A) of the content of the following component (a1) to the content of the component (A) is 0.16 or more and 0.70 or less,
the mass ratio (a1)/(B) of the content of the component (a1) to the content of the component (B) is 0.2 or more and 2.0 or less;
the mass ratio (a2)/(A) of the content of the component (a2) to the content of the component (A) is 0.3 or more and 0.75 or less;
The powder detergent composition includes a powder detergent composition having a sodium carbonate content of 3% by mass or more and 9% by mass or less as the component (B).
Component (A): Anionic surfactant containing the following components (a1) and (a2) Component (a1): A compound represented by the following general formula (a1): R ^1a -O-(AO) _n -SO ₃ M (a1)
[In the formula, R ^1a is an aliphatic hydrocarbon group having 10 to 18 carbon atoms, AO is an alkyleneoxy group having 2 to 3 carbon atoms, n is the average number of moles of AO added and is a number of 1 to 20, and M is a cation.]
Component (a2): alkylbenzenesulfonic acid or a salt thereof Component (B): one or more alkaline agents selected from sodium carbonate and potassium carbonate

The present invention also provides a composition comprising the following component (A) in an amount of 5% by mass or more and 12% by mass or less, and the following component (B) in an amount of 3% by mass or more and 10% by mass or less:
a mass ratio (a1)/(A) of the content of the following component (a1) to the content of the component (A) is 0.16 or more and 0.70 or less,
the mass ratio (a1)/(B) of the content of the component (a1) to the content of the component (B) is 0.2 or more and 2.0 or less;
the mass ratio (a2)/(A) of the content of the component (a2) to the content of the component (A) is 0.3 or more and 0.75 or less;
the mass ratio (a2)/(B) of the content of the component (a2) to the content of the component (B) is 0.5 or more and 2.5 or less;
The powder detergent composition includes a powder detergent composition having a sodium carbonate content of 3% by mass or more and 9% by mass or less as the component (B).
Component (A): Anionic surfactant containing the following components (a1) and (a2) Component (a1): A compound represented by the following general formula (a1): R ^1a -O-(AO) _n -SO ₃ M (a1)
[In the formula, R ^1a is an aliphatic hydrocarbon group having 10 to 18 carbon atoms, AO is an alkyleneoxy group having 2 to 3 carbon atoms, n is the average number of moles of AO added and is a number of 1 to 20, and M is a cation.]
Component (a2): alkylbenzenesulfonic acid or a salt thereof Component (B): one or more alkaline agents selected from sodium carbonate and potassium carbonate

The present invention also provides a composition comprising the following component (A) in an amount of 5% by mass or more and 12% by mass or less, and the following component (B) in an amount of 3% by mass or more and 10% by mass or less:
a mass ratio (a1)/(A) of the content of the following component (a1) to the content of the component (A) is 0.16 or more and 0.70 or less,
the mass ratio (a1)/(B) of the content of the component (a1) to the content of the component (B) is 0.2 or more and 2.0 or less;
the mass ratio (a2)/(A) of the content of the component (a2) to the content of the component (A) is 0.3 or more and 0.75 or less;
the mass ratio (a2)/(B) of the content of the component (a2) to the content of the component (B) is 0.5 or more and 2.5 or less;
the mass ratio (A)/(total surfactants) of the content of the component (A) to the content of all surfactants is 0.6 or more and 0.95 or less;
The powder detergent composition includes a powder detergent composition having a sodium carbonate content of 3% by mass or more and 9% by mass or less as the component (B).
Component (A): Anionic surfactant containing the following components (a1) and (a2) Component (a1): A compound represented by the following general formula (a1): R ^1a -O-(AO) _n -SO ₃ M (a1)
[In the formula, R ^1a is an aliphatic hydrocarbon group having 10 to 18 carbon atoms, AO is an alkyleneoxy group having 2 to 3 carbon atoms, n is the average number of moles of AO added and is a number of 1 to 20, and M is a cation.]
Component (a2): alkylbenzenesulfonic acid or a salt thereof Component (B): one or more alkaline agents selected from sodium carbonate and potassium carbonate

The present invention also provides a composition comprising the following component (A) in an amount of 5% by mass or more and 12% by mass or less, and the following component (B) in an amount of 3% by mass or more and 10% by mass or less:
a mass ratio (a1)/(A) of the content of the following component (a1) to the content of the component (A) is 0.16 or more and 0.70 or less,
the mass ratio (a1)/(B) of the content of the component (a1) to the content of the component (B) is 0.2 or more and 2.0 or less;
the mass ratio (a2)/(A) of the content of the component (a2) to the content of the component (A) is 0.3 or more and 0.75 or less;
the mass ratio (a2)/(B) of the content of the component (a2) to the content of the component (B) is 0.5 or more and 2.5 or less;
the mass ratio (A)/(total surfactants) of the content of the component (A) to the content of all surfactants is 0.6 or more and 0.95 or less;
the component (B) contains sodium carbonate, and the content of sodium carbonate in the powder detergent composition is 3% by mass or more and 9% by mass or less;
The present invention relates to a powder detergent composition having a bulk density of 400 g/L or more and 900 g/L or less, as measured by the method specified in JIS K 3362:2008.
Component (A): Anionic surfactant containing the following components (a1) and (a2) Component (a1): A compound represented by the following general formula (a1): R ^1a -O-(AO) _n -SO ₃ M (a1)
[In the formula, R ^1a is an aliphatic hydrocarbon group having 10 to 18 carbon atoms, AO is an alkyleneoxy group having 2 to 3 carbon atoms, n is the average number of moles of AO added and is a number of 1 to 20, and M is a cation.]
Component (a2): alkylbenzenesulfonic acid or a salt thereof Component (B): one or more alkaline agents selected from sodium carbonate and potassium carbonate

The present invention also relates to a method for cleaning hard surfaces and/or textile products, in which the hard surfaces and/or textile products are cleaned using a cleaning liquid obtained by mixing the powder detergent composition of the present invention with water.

The present invention provides a powder detergent composition that has both good cleaning properties, particularly for cleaning heat-denatured oil stains or sebum stains, and good rinsing properties, and also has a good cleaning feel and reduced sticky feeling.

Modes for Carrying Out the Invention The reason why the powder detergent composition of the present invention achieves four elements, namely, good cleaning performance, particularly for cleaning thermally denatured oily soils or sebum soils, good cleaning feel, and suppressed sticky feeling, is not entirely clear, but is presumed to be as follows. To achieve both cleaning performance and rinsing performance, it is essential to blend a certain amount of component (a1), which has excellent cleaning performance but has a problem with rinsing performance, and component (A) containing the same. If a large amount of soda ash is blended to eliminate this trade-off, the cleaning feel and sticky feeling will deteriorate. Therefore, in the powder detergent composition of 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 achieves all of the above four elements. It is presumed that the mechanism by which the (a1) component exerts a cleansing feeling is that the (A) component binds with the hardness components in tap water to form scum of the (A) component, which reduces the inherent slipperiness of the (A) component, but by including the (a1) component as the (A) component, the (A) component is prevented from becoming scum, and the slipperiness is exerted, which results in the expression of a good cleansing feeling. Also, as the mechanism by which the (B) component deteriorates the sticky feeling, it is presumed that the incorporation of a large amount of the (B) component makes the cleaning solution alkaline, which promotes the swelling of the keratin of human skin, which is perceived as a sticky feeling on the skin, so that it is necessary to limit the content of the (B) component.

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

In the component (a1), in general formula (a1), R ^1a is an aliphatic hydrocarbon group having 10 or more, preferably 12 or more, and 18 or less, preferably 16 or less carbon atoms, preferably an alkyl or alkenyl group, more preferably an alkyl group, from the viewpoint of cleaning properties, particularly cleaning properties for heat-denatured oily soils or sebum soils. AO is preferably an ethyleneoxy 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 properties, particularly cleaning properties for heat-denatured oily soils or sebum soils and cleaning feeling.
M is a cation, and examples of the cation include alkali metal ions such as sodium ion and potassium ion; alkaline earth metal ions such as calcium ion and magnesium ion; ammonium ion; and alkanol ammonium ions having 1 to 3 alkanol groups having 2 or 3 carbon atoms (for example, monoethanol ammonium ion, diethanol ammonium ion, triethanol ammonium ion, triisopropanol ammonium ion, etc.).

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

Examples of the component (a2) include one or more anionic surfactants selected from alkylbenzenesulfonic acids, olefinsulfonic acids, alkanesulfonic acids, alkyl or alkenyl sulfosuccinic acid esters, and salts thereof.
The number of carbon atoms in the alkyl or alkenyl group of these anionic surfactants is, for example, 8 or more and 22 or less.
Examples of counter ions of the anionic groups of these anionic surfactants include alkali metal ions such as sodium ion and potassium ion; alkaline earth metal ions such as calcium ion and magnesium ion; ammonium ion; and alkanol ammonium ions having 1 to 3 alkanol groups having 2 or 3 carbon atoms (for example, monoethanol ammonium ion, diethanol ammonium ion, triethanol ammonium ion, triisopropanol ammonium ion, etc.).

The component (a2) is preferably an alkylbenzenesulfonic acid or a salt thereof, from the viewpoint of further enhancing the rinsing ability when used in combination with the component (a1) and from the viewpoint of ease of formulation into a powder formulation.
From the viewpoint of cleaning properties, the number of carbon atoms in the alkyl group of the 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 still more preferably 14 or less, and the alkyl group is preferably linear.

From the viewpoint of rinsing ability, the powder detergent composition of the present invention preferably further contains the following component (a3) as the component (A):
Component (a3): alkyl or alkenyl sulfate ester or its salt (excluding those corresponding to component (a1))

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

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

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.

From the viewpoint of cleaning properties, particularly for cleaning thermally denatured oily stains or sebum stains, and powder formulation, component (B) is preferably one or more selected from sodium carbonate, potassium carbonate, sodium bicarbonate, and potassium bicarbonate, and more preferably one or more selected from sodium carbonate and potassium carbonate.

<Composition, etc.>
The powder detergent composition of the present invention contains component (A) in an amount of preferably 4 mass % or more, preferably 5 mass % or more, more preferably 6 mass % or more, even more preferably 8 mass % or more, and 12 mass % or less, preferably 11 mass % or less, and more preferably 10 mass % or less, from the viewpoint of cleaning ability, particularly cleaning ability and rinsability for thermally denatured oily soils or sebum soils. Also, from the viewpoint of being a preferred cleaning composition that can be used for both hard surfaces and textile products, as described below, the powder detergent composition of the present invention contains component (A) in an amount of preferably 11 mass % or less, more preferably 10 mass % or less, and preferably 7 mass % or more, and more preferably 9 mass % or more.
In the present invention, the mass of component (A) is expressed as a value converted into a sodium salt. Similarly, the masses of components (a1), (a2), and (a3) contained in component (A) are expressed as values converted into sodium salts. Moreover, component (a1), optional component (a2), or optional component (a3) may be blended together to contain each component in the powder detergent composition of the present invention.

In the powder detergent composition of the present invention, the mass ratio (a1)/(A) of the content of the component (a1) to the content of the component (A) is 0.16 or more, preferably 0.20 or more, more preferably 0.25 or more, and 0.70 or less, preferably 0.65 or less, from the viewpoints of cleaning performance, particularly cleaning performance for thermally denatured oily soils or sebum soils, rinsing performance, and cleaning feeling.

When the powder detergent composition of the present invention contains the component (a2) as the component (A), the mass ratio (a2)/(A) of the content of the component (a2) to the content of the component (A) is preferably 0.30 or more, more preferably 0.35 or more, and preferably 0.84 or less, more preferably 0.80 or less, and even more preferably 0.75 or less, from the viewpoints of cleaning performance, particularly cleaning performance for thermally denatured oily soils or sebum soils, rinsing performance, 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, based on the viewpoints of cleaning properties, particularly cleaning properties for thermally altered oily stains or sebum stains, and removal of stickiness.

When the powder detergent composition of the present invention contains sodium carbonate as component (B), from the viewpoint of cleaning performance, particularly cleaning performance for thermally denatured oily stains or sebum stains, and removal of stickiness, the sodium carbonate content in the composition is preferably 3% by mass or more, preferably 4% by mass or more, more preferably 4.5% by mass or more, and 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.

In the powder detergent composition of the present invention, the mass ratio (a1)/(B) of the content of the component (a1) to the content of the 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, more preferably 1.2 or less, even more preferably 1.0 or less, from the viewpoints of cleaning ability, particularly cleaning ability for thermally denatured oily soils or sebum soils, suppression of stickiness, and cleaning feeling.

When the powder detergent composition of the present invention contains the component (a2) as the component (A), the mass ratio (a2)/(B) of the content of the component (a2) to the content of the component (B) is, from the viewpoints of cleaning performance, particularly cleaning performance for thermally denatured oily soils or sebum soils, cleaning feel, rinsing performance, and suppression of sticky feeling, preferably 0.5 or more, more preferably 0.6 or more, even more preferably 0.7 or more, and preferably 2.5 or less, more preferably 2.0 or less, even more preferably 1.8 or less, even more preferably 1.5 or less, even more preferably 1.1 or less, and even more preferably 0.9 or less.

The powder detergent composition of the present invention may contain a surfactant other than the component (A) as long as the effect of the present invention is not impaired.
In the powder detergent composition of the present invention, from the viewpoints of cleaning performance and rinsing performance, the total surfactant content is preferably 5 mass % or more, more preferably 7 mass % or more, even more preferably 9 mass % or more, and preferably 13 mass % or less, more preferably 12 mass % or less, even more preferably 11 mass % or less.
In the powder detergent composition of the present invention, the mass ratio of the content of component (A) to the content of all surfactants, (A)/(total surfactants), is, from the viewpoints of cleaning ability, particularly cleaning and rinsing ability for thermally denatured oily stains or sebum stains, and of preparation as a powder formulation, preferably not less than 0.60, more preferably not less than 0.70, even more preferably not less than 0.80, and preferably not more than 1.0, more preferably not more than 0.95, even more preferably not more than 0.90.

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 3,000 or more, from the viewpoint of cleaning properties, particularly cleaning properties for thermally denatured oily stains or sebum stains, and from the viewpoint of powder formulation.

Examples of the component (C) include one or more selected from a polymer selected from polyacrylic acid or a salt thereof, and a copolymer of acrylic acid and maleic acid or a salt thereof (hereinafter referred to as component (c1)), and carboxymethyl cellulose or a salt thereof (hereinafter referred to as component (c2)).
The polyacrylic acid or a salt thereof may be one or more selected from polyacrylic acid, sodium polyacrylate, potassium polyacrylate, and the like, and preferably one or more selected from sodium polyacrylate and potassium polyacrylate.
The copolymer of acrylic acid and maleic acid or its salt may be one or more selected from the group consisting of a copolymer of acrylic acid and maleic acid, a sodium salt of a copolymer of acrylic acid and maleic acid, and a potassium salt of a copolymer of acrylic acid and maleic acid, and is preferably one or more selected from the group consisting of a sodium salt of a copolymer of acrylic acid and maleic acid, and a potassium salt of a copolymer of acrylic acid and maleic acid. The molar ratio of the copolymer of acrylic acid and maleic acid, in terms of the number of moles of acrylic acid/the number of moles of maleic acid, is preferably 1/99 or more, more preferably 10/90 or more, and is preferably 99/1 or less, more preferably 90/10 or less.

The (c1) component may be a copolymer containing a monomer other than acrylic acid and maleic acid that is copolymerizable with acrylic acid and/or maleic acid, so long as it does not interfere with the manifestation 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 of monomers 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 the (c1) component is preferably 0 mol% or more, and 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 of acrylic acid and maleic acid or its salt of the present invention may be a polymer or copolymer that contains, among all constituent monomers, monomers other than acrylic acid and maleic acid that are copolymerizable with acrylic acid and/or maleic acid in the range of 0 mol % or more and 5 mol % or less.

The weight average molecular weight of the component (c1) is 3,000 or more, preferably 5,000 or more, more preferably 8,000 or more, and preferably 100,000 or less, more preferably 50,000 or less, and even more preferably 20,000 or less.
The weight average molecular weight of the (c2) component 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 the (c2) component is 0.1 or more, preferably 0.3 or more, and 0.8 or less, preferably 0.6 or less.
The weight average molecular weight can be measured according to the following method for measuring weight average molecular weight.
<Method for measuring weight average molecular weight>
The weight average molecular weight of the 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 measurement conditions for GPC are shown below.
Column: 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 dihydrogen phosphate and 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 standard material: Polyacrylic acid (American Standard Corporation)
Sample: Ion-exchanged water is added to an aqueous polymer solution containing 0.8 g of solids, and the total volume of the solution is adjusted to 200 mL. 10 μL of the solution is then dispensed and injected into the column.

When the powder detergent composition of the present invention contains component (C), from the viewpoints of cleaning ability, particularly cleaning ability for thermally denatured oily soils or sebum soils, and preparation into a powder formulation, the powder detergent composition of the present invention contains component (C) in an amount of preferably 0.1 mass % or more, more preferably 0.2 mass % or more, even more preferably 0.3 mass % or more, and preferably 1.0 mass % or less, more preferably 0.8 mass % or less, even more preferably 0.6 mass % or less.
In the present invention, the mass of the component (C) is expressed as a value converted into a sodium salt.

The powder detergent composition of the present invention may contain an alkali metal silicate as component (D) from the viewpoint of cleaning properties, particularly cleaning properties for thermally denatured oily stains or sebum stains, and from the viewpoint of powder formulation.
The alkali metal silicate may be at least one selected from sodium silicate and potassium silicate.

When the powder detergent composition of the present invention contains component (D), from the viewpoint of cleaning properties, particularly cleaning properties for thermally denatured oily stains or sebum stains, and from the viewpoint of powder formulation, the powder detergent composition contains component (D) in an amount of preferably 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.

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

When the powder detergent composition of the present invention contains component (E), the content of component (E) in the composition is 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, even more preferably 80% by mass or less.

The powder detergent composition of the present invention may contain water. The water may be deionized water (also called ion-exchanged water) or water to which sodium hypochlorite has been added in an amount of 1 mg/kg or more and 5 mg/kg or less based on the ion-exchanged water. Tap water may also be used.
When the powder detergent composition of the present invention contains water, the water content in the composition is preferably 0.01 mass % or more, more preferably 0.1 mass % or more, even more preferably 1 mass % or more, and preferably 15 mass % or less, more preferably 10 mass % or less, even more preferably 5 mass % or less.

The powder detergent composition of the present invention may contain other ingredients known in the field of powder detergents for hard surfaces and powder detergents for textile products, such as zeolite, bentonite, tripolyphosphate, polyalkylene glycol, bleaching agents (perborates, bleach activators, etc.), anti-redeposition agents, reducing agents (sulfites, etc.), fluorescent brightening agents (for example, Tinopal CBS (trade name, manufactured by Ciba Specialty Chemicals) and Whitex SA (trade name, manufactured by Sumitomo Chemical Co., Ltd.)), foam inhibitors (silicones, etc.), organic solvents, enzymes (cellulase, protease, peptinase, lipase, dextranase, amylase, etc.), fragrances, colorants, etc. (however, excluding those corresponding to components (A) to (E)).

The pH at 25° C. when 1 g of the powder detergent composition of the present invention is diluted to 1,000 g with ion-exchanged water is, from the viewpoints of cleaning ability, particularly cleaning ability for thermally denatured oily stains or sebum stains, and removal of stickiness, preferably 9.0 or more, more preferably 9.5 or more, even more preferably 9.9 or more, and preferably 12.0 or less, more preferably 11.0 or less, even more preferably 10.6 or less.
In the present invention, the pH is measured according to the pH measurement method described below.
<Method of measuring pH>
A composite electrode for pH measurement (glass-ground sleeve type, manufactured by HORIBA) is connected to a pH meter (pH/ion meter F-23, manufactured by HORIBA) and the power is turned on. A saturated potassium chloride aqueous solution (3.33 mol/L) is used as the internal solution of the pH electrode. Next, a pH 4.01 standard solution (phthalate standard solution), a pH 6.86 standard solution (neutral phosphate standard solution), and a pH 9.18 standard solution (borate standard solution) are filled in 100 mL beakers and immersed in a thermostatic bath at 25°C for 30 minutes. The pH measurement electrode is immersed in the thermostatically adjusted standard solution for 3 minutes, and calibration operations are performed in the order of pH 6.86 → pH 9.18 → pH 4.01. The sample to be measured is adjusted to 25°C, the electrode of the pH meter is immersed in the sample, and the pH is measured after 1 minute.

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

From the viewpoint of the flowability of the powder detergent composition of the present invention, the average particle size is preferably 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 size of the sieve mesh after vibrating for 5 minutes using a standard sieve of JIS Z 8801.

The powder detergent composition of the present invention can be produced by known methods. For example, it can be produced by applying a spray drying method, a dry neutralization method, a dry granulation method, a dry blend method, a fluidized bed drying method, a thin film drying method, an extrusion granulation method, a rolling granulation method, a stirring granulation method, a compaction granulation method, a surfactant carrying method, or a combination of methods selected from these.

The powder detergent composition of the present invention can be suitably used for hard surfaces and/or textile products.
Furthermore, the powder detergent 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 has both cleaning properties, particularly for cleaning heat-denatured oily soils or sebum soils, and rinsing properties, and further has a good cleaning feeling and suppresses a sticky feeling, and therefore can be suitably used for hand washing hard surfaces and/or hand washing textile products. In the present invention, hand washing includes not only scrubbing with fingers, etc., but also scrubbing with hands using cleaning aids such as sponges and brushes.

The hard surface to be cleaned with the powder detergent composition of the present invention is preferably used in a bathroom, a kitchen, or a toilet, more preferably used in a bathroom or a toilet. Specifically, the powder detergent composition of the present invention can be applied to hard surfaces around the bathroom (walls, floors, bathtubs, etc.) and hard surfaces of products used in the bathroom (bathroom chairs, washbasins, etc.). The powder detergent composition of the present invention can also be applied to hard surfaces around the kitchen (walls, floors, sinks, etc.) and hard surfaces of products used in the kitchen (cookers, microwave ovens, ovens, refrigerators, etc.). The powder detergent composition of the present invention can also 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.).
The powder detergent composition of the present invention can also be applied to hard surfaces such as floors, flooring, windows, motorbikes, and bicycles.
The hard surface material that can be targeted by the powder detergent composition of the present invention includes hard surfaces made of one or more materials selected from plastics, ceramics, metals, wood, glass, rubber, carbon materials, and the like.

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 (polycral, etc.), polyalkylene paraoxybenzoate fibers (benzoate, etc.), polyfluoroethylene fibers (polytetrafluoroethylene, etc.), glass fibers, carbon fibers, alumina fibers, silicone carbide fibers, rock fibers (rock fibers), slag fibers (slag fibers), and metal fibers (gold thread, silver thread, steel fibers). Examples of hydrophilic fibers include seed hair fibers (cotton, cotton, kapok, etc.), bast fibers (hemp, flax, ramie, hemp, jute, etc.), leaf vein fibers (Manila hemp, sisal, etc.), palm fibers, rush, straw, animal hair fibers (wool, mohair, cashmere, camel hair, alpaca, vicuna, angora, etc.), silk fibers (domestic silk, wild silk), feathers, cellulosic fibers (rayon, polynosic, cupra, acetate, etc.), and the like.
From the viewpoint of finish, the fiber is preferably a fiber containing cotton fiber. From the viewpoint of washability, particularly washability against sebum stains, the content of cotton fiber in the fiber is preferably 5% by mass or more, more preferably 10% by mass or more, even more preferably 15% by mass or more, still 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 still more preferably 70% by mass or less.

In the present invention, textile products refer to fabrics such as woven fabrics, knitted fabrics, and nonwoven fabrics that use the hydrophobic and hydrophilic fibers described above, and products obtained using the same, such as undershirts, T-shirts, dress shirts, blouses, slacks, hats, handkerchiefs, towels, knitwear, socks, underwear, and tights.

Method for cleaning hard surfaces and/or textiles
The present invention provides a method for cleaning hard surfaces and/or textile products, which comprises cleaning the hard surfaces and/or textile products with a cleaning liquid comprising a mixture of the powder detergent composition of the present invention and water (hereinafter referred to as the cleaning liquid of the present invention).
The hard surfaces and/or textile products to be cleaned are the same as those described for 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 for the powder detergent composition of the present invention.

In the method for cleaning 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 the total amount of the powder detergent composition of the present invention 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, even more preferably 6 g or less per 1 L of water, from the viewpoint of cleaning performance, particularly cleaning performance and rinsing performance of thermally denatured oil stains or sebum stains.

In the method for cleaning hard surfaces and/or textile products of the present invention, the temperature of water is, from the viewpoint of cleaning performance, 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, even more preferably 60° C. or lower.
The cleaning solution of the present invention may have a temperature in the above range. The temperature of water used in the cleaning method, such as water used for rinsing, may also be in the above range.

The pH of the cleaning solution of the present invention at 25°C is, from the viewpoints of cleaning ability, particularly cleaning ability for thermally denatured oil stains or sebum stains, and removal of stickiness, preferably 9.0 or more, more preferably 9.5 or more, even more preferably 9.9 or more, and is preferably 12.0 or less, more preferably 11.0 or less, even more preferably 10.6 or less.
The pH is measured according to the pH measuring method described above in the embodiment of the powder detergent composition of the present invention.

In the method for cleaning hard surfaces and/or textile products of the present invention, 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 a method of scrubbing the textile product with hands, a method of pushing the textile product, and a method of rubbing the textile products together with hands.

In the method for cleaning hard surfaces and/or textile products of the present invention, when the object to be cleaned is a textile product, the textile product can be cleaned in a washing machine.
Examples of the washing machine include a vertical washing machine, a two-layer washing machine, a drum washing machine, a pulsator washing machine, an agitator washing machine, a small washing machine, etc. These washing machines can be commercially available for home use.

In the cleaning method of the present invention for hard surfaces and/or textile products, when the object to be cleaned is a textile product, the value of the bath ratio, which is expressed as the ratio of the mass (kg) of the textile product to the amount of water (liters) of the cleaning solution of the present invention containing the powder detergent composition of the present invention and water, i.e., the value of the amount of water (liters) of the cleaning solution of the present invention/mass (kg) of the textile product, is preferably 8 or more, more preferably 10 or more, even more preferably 12 or more, even more preferably 15 or more, and preferably 45 or less, more preferably 40 or less, even more preferably 30 or less, and even more preferably 20 or less, from the viewpoints 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 detergent composition of the present invention, the textile product, and water (i.e., the cleaning time for contacting the textile product with the cleaning liquid of the present invention) 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 is preferably 1 hour or less, more preferably 45 minutes or less, and even more preferably 30 minutes or less from the viewpoint of damage to the textile product.
After washing the textile product, it can be rinsed and dehydrated. The rinsing and dehydration can be done by hand or using a washing machine. The rinsing and dehydration can be done alternately multiple times.
After rinsing and spin-drying, drying can be performed. Drying can be either natural drying or heat drying. Each drying can be performed multiple times.

In the method for cleaning 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. Examples of the method for bringing the cleaning solution of the present invention into contact with the hard surface include coating, spraying, and immersion, and coating or spraying is preferred.
After the cleaning solution of the present invention has been brought into contact with a hard surface, the surface is scrubbed with a cleaning aid such as a sponge or brush, or with the hands or fingers.

In the method for cleaning 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 at a rate of preferably 1 g ^{or more} , more preferably 3 g or more, even more preferably 5 g or more, and preferably 15 g or less, more preferably 12 g or less, even more preferably 10 g or less, per 100 cm2 area of the hard surface that is the object, from the viewpoint of cleaning performance, in particular cleaning performance and rinsing performance of thermally denatured oil stains or sebum stains.

In the method for cleaning hard surfaces and/or textile products of the present invention, when the object to be cleaned is a hard surface, the time for contacting the cleaning solution of the present invention with the hard surface is, from the viewpoint of enhancing the cleaning power, preferably 10 seconds or more, more preferably 20 seconds or more, even more preferably 30 seconds or more, still more preferably 40 seconds or more, and from the same viewpoint, preferably 60 minutes or less, more preferably 30 minutes or less, even more preferably 20 minutes or less, still more preferably 10 minutes or less. During the contact between the hard surface and the cleaning solution of the present invention, an external force (physical force) may be applied to the hard surface by rubbing it with a cleaning aid such as a finger, sponge or brush, or the hard surface may be left as it is.
After contacting the hard surface with the cleaning solution of the present invention for a predetermined period of time, if necessary, the hard surface is rinsed with water. When rinsing, the hard surface may be subjected to an external force (physical force) by rubbing the hard surface with fingers or a cleaning aid such as a sponge or brush, or may simply be rinsed with a water stream.

Example [Ingredients]
In the examples and comparative examples, the following components were used.
<Component (A)>
ES: sodium polyoxyethylene lauryl ether sulfate, EMAL 270J, manufactured by Kao Corporation, component (a1) LAS: sodium laurylbenzenesulfonate, Neoperex G-15, manufactured by Kao Corporation, component (a2) AS: sodium lauryl sulfate, EMAL 10G, manufactured by Kao Corporation, component (a3) <component (B)>
Sodium carbonate: light ash, manufactured by Central Glass Co., Ltd. (Component (C))
Oligomer D: sodium polyacrylate, manufactured by Kao Corporation, weight average molecular weight 10,000 <component (D)>
Crystalline silicate: sodium silicate, "No. 2 silicate" manufactured by Fuji Chemical Co., Ltd., purity 40%, the numbers in the table are the purity values <Component (E)>
・Sodium sulfate: Anhydrous neutral Glauber's salt, manufactured by Shikoku Chemical Industry Co., Ltd. <Other ingredients>
Bentonite: Kunipia F, manufactured by Kunimine Kogyo Co., Ltd. Fluorescent dye: Chinopal 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 blended components were kneaded to prepare the powder detergent compositions shown in Tables 1 and 2. Specifically, component (A) was freeze-dried in advance and powdered in a mortar. Components (B), (C), (D) and (E) were also powdered in a mortar. These powdered components (A) to (E) were kneaded until homogeneous, and the above other components were added and further thoroughly stirred to obtain each powder detergent composition having the blend shown in Tables 1 and 2. The mass % of each blended component in Tables 1 and 2 is all based on the active component. Each of the prepared powder detergent compositions had a bulk density of 500 to 800 g/L as measured by the method specified in JIS K 3362:2008, and had an average particle size of 300 μm as calculated from the mass fraction based on the size of the sieve mesh after vibration for 5 minutes using a standard sieve of JIS Z 8801.
When 1 g of each of the prepared powder detergent compositions was diluted with ion-exchanged water to 1,000 g, the pH was 9.5 to 11.0 at 25° C. The pH was measured in the same manner as described above for the embodiment of the powder detergent composition of the present invention.

[Example 1 and Comparative Example 1: Evaluation of hard surface applications]
<Rinsing (foam removal) evaluation>
Each powder detergent composition in Table 1 was diluted with 10° DH hard water to 4 g/L, and 20 mL of each detergent 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.) and the substrate was scrubbed in one direction with a brush (product name: Kitchen Brush No. 36, brush width: 4 mm, manufactured by Daiso Industries Co., Ltd.) 10 times for 10 seconds. The stains on the substrate were evaluated in an additive-free system. Then, 10 mL of water in a 50 mL beaker was gently poured over the substrate surface, and the rinsing property (foam removal property) was visually evaluated according to the following evaluation criteria. The results are shown in Table 1.
Evaluation Criteria A: No bubbles remain on the substrate.
B: Almost no bubbles remain on the substrate.
C: Some bubbles remain on the substrate.
A is the most excellent in rinsing property (foam-removing property), and is superior to B, which is also superior to C in rinsing property (foam-removing property).

<Slippery Feeling Evaluation>
Each powder detergent composition in Table 1 was diluted to 4 g/L with 10° DH hard water, and 20 mL of each detergent solution was applied to a substrate (the same substrate as used in the above-mentioned rinsing evaluation was used), and the substrate was scrubbed in one direction with a brush (the same brush as used in the above-mentioned rinsing evaluation was used) 10 times for 10 seconds. Then, 10 mL of water in a 50 mL beaker was gently poured onto the substrate surface. Then, five panelists rubbed the substrate with their fingers 10 times to evaluate the stickiness, and the number of panelists who judged the substrate to be non-sticky and slippery is shown in Table 1. It can be said that the more panelists who judged the substrate to be non-sticky and slippery, the higher the comfort of hand washing.

<Evaluation of cleaning ability>
A substrate (the same as the substrate used in the rinsing 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 thermally denatured oil stains. Each powder detergent composition in Table 1 was diluted to 4 g/L with 10° DH hard water, and 20 mL of each cleaning solution was applied to the substrate. The substrate was scrubbed with a brush (the same as the brush used in the rinsing evaluation) in one direction 10 times for 10 seconds. The substrate after cleaning, the substrate before cleaning, and the substrate before oil application were stained with Sudan III (manufactured by Wako Pure Chemical Industries, Ltd., Grade 1), and the gray value was calculated using ImageJ, and the cleaning rate of the denatured oil stains was calculated according to formula (1). The results are shown in Table 1. The cleaning rate is preferably 70% or more.
Cleaning rate (%) = (gray value (substrate after cleaning) - gray value (substrate before cleaning)) ÷ (gray value (substrate before oil application) - gray value (substrate before cleaning)) ... (1)

<(Easy) Cleaning Feel Evaluation (Evaluation of how easily the brush slides when cleaning with a brush)>
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 a cleaning solution with a concentration of 0.4 mass% of the powder detergent composition. 20 mL of each cleaning solution was applied to a substrate (the same substrate as used in the above-mentioned rinsing performance evaluation was used), and the substrate was scrubbed in one direction with a brush (the same brush as used in the above-mentioned rinsing performance evaluation was used) 10 times for 10 seconds. The smoothness of the brush was evaluated sensorily based on the feel of the brush during the above-mentioned cleaning. Five panelists judged whether the brush was smooth, and the number of panelists who judged the brush to be smooth is shown in Table 1. It can be said that the more panelists who judged the brush to be smooth, the higher the comfort of brush cleaning.

[Example 2 and Comparative Example 2: Evaluation of textile product applications]
<Rinsing (foam removal) evaluation>
1. Preparation of artificial sebum-stained cloth - artificial soil A composition containing the following A, B, C, D, and E was prepared to serve as artificial soil. The mass % of each component is the proportion of the final composition of the artificial soil, and the amount of B was adjusted so that the total was 100 mass %.
A: Model sebum soil (used in amounts such that the mass percentages in the artificial soil are 0.44 mass% lauric acid, 3.15 mass% myristic acid, 2.35 mass% pentadecanoic acid, 6.31 mass% palmitic acid, 0.44 mass% heptadecanoic acid, 1.6 mass% stearic acid, 7.91 mass% oleic acid, 13.33 mass% triolein, 2.22 mass% n-hexadecyl palmitate, and 6.66 mass% squalene)
B: Hard water obtained by weighing out 105 mg of calcium chloride dihydrate and dissolving it in distilled water to make 1,000 mL. C: Egg white lecithin liquid crystal product 1.98% by mass (egg white lecithin liquid crystal product 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 soil 8.11% by mass
E: 0.025% by mass of carbon black
Artificial sebum-stained cloth The artificial sebum-stained cloth used was prepared by gravure coating 100 mg of artificial dirt composed of the above composition onto a 6 cm x 6 cm cotton/polyester broadcloth (cotton/polyester ratio = 35/65, purchased from Tanigashira Shoten).

2. Preparation of mud-stained cloth The mud-stained cloth used for the evaluation was prepared according to the following procedure. This method adheres particles between the fibers by re-contamination, so the soil is more difficult to remove than soiled cloth with mud applied to the surface. The mud used was Kanuma gardening red ball soil, which was dried for 4 hours at 120°C ± 5°C, crushed, and sieved through a 75 μm sieve. 6 g of mud was added to 1,000 mL of ion-exchanged water, stirred, and then ultrasonically applied for 15 minutes. These were transferred to a tergotometer, and 15 g of cotton knitted cloth (purchased from Tanigashira Shoten, 6 cm x 6 cm) was added and stirred for 20 minutes at 20°C, 100 rpm. The cloth was then rinsed with running water for 1 minute, dehydrated for 1 minute, and naturally dried overnight to prepare a mud-stained cloth.

3. Evaluation of Rinsing Ability (Foam Breaking Ability) 3 L of model water at 30°C was placed in a model circular washbasin (a cylindrical acrylic container with a bottom 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), further adding sodium bicarbonate to the model water so that the alkalinity was 60 mg/L, and adjusting the pH to 7 with hydrochloric acid. Next, 12 g of each powder detergent composition in Table 2 was added and dissolved in the model water to prepare a cleaning solution with a powder detergent composition concentration of 4 mass%. Three pieces of clothing to be evaluated (100% cotton T-shirt, 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 to stand completely immersed in the cleaning solution for 30 minutes. After leaving them, the artificial sebum-stained cloth was washed for 15 seconds and the mud-stained cloth was washed for 30 seconds for each evaluation garment (one round trip (approximately 1 second) of rubbing the fabrics together was counted as one wash). The evaluation garments were then removed and wrung out 10 cm above the wash basin so that the moisture content of the evaluation garments was approximately 100 to 140% by mass.
Into another model circular washbasin, 3 L of the model water with a water temperature of 30°C was poured. Three pieces of evaluation clothing with the water content reduced were poured therein, and the evaluation clothing was loosened in the model water, and then each loosened evaluation clothing was lifted up from the water bath by holding the collar part (lifted from the water bath to a height of about 5 cm above the washbasin until the entire clothing was completely removed), and then returned to the water bath. After repeating this up-and-down rinsing 10 times for each evaluation clothing, the evaluation clothing was squeezed 10 cm above the washbasin so that the water content of the evaluation clothing was about 100 to 140% of the underwear, and the state of the rinse water immediately after rinsing and spin-drying of the three evaluation clothing was observed, and the rinsing property was evaluated according to the following evaluation criteria. The results are shown in Table 2.
Evaluation Criteria A: No bubbles remain on the surface of the water in the bucket.
B: Almost no bubbles on the surface of the water in the bucket.
C: Some foam remains on the surface of the water in the bucket.
A is the most excellent in rinsing property (foam-removing property), and is superior to B, which is also superior to C in rinsing property (foam-removing property).

<Slippery Feeling Evaluation>
For each rinse solution after the above-mentioned rinsing property (foam removal) evaluation, five panelists put both hands into the rinse solution and rubbed their fingers together 10 times to evaluate the stickiness of the rinse solution, and the number of panelists who judged the rinse solution to be not sticky is shown in Table 2. The more panelists who judged the rinse solution to be slippery, the more comfortable it is for hand washing.

<Evaluation of cleaning ability>
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 a cleaning solution containing 0.4% by mass of the powder detergent composition. Four pieces of artificial sebum-stained cloth (the same as those used in the rinsing performance evaluation) were placed in 1 L of the prepared cleaning solution, immersed for 30 minutes, and then washed for 3 minutes at 180 r/min using a tergotometer (MS-8212, manufactured by Ueshima Co., Ltd., inner diameter 12 cm, height 17.5 cm). After washing, the cloth was 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 based on the following formula (1). Specifically, the reflectance of the original cloth before artificial sebum contamination and the artificial sebum-stained cloth before and after washing was measured using a colorimeter (Z-300A, manufactured by Nippon Denshoku Co., Ltd.), and the cleaning rate (%) was calculated based on the following formula (1). The cleaning rate result is the average of the calculation results for four pieces of cloth soiled with artificial sebum. The higher the cleaning rate, the better the cleaning performance.
Cleaning rate (%) = 100 × [(reflectance of artificial sebum-stained cloth after cleaning - reflectance of artificial sebum-stained cloth before cleaning) / (reflectance of original cloth - reflectance of artificial sebum-stained cloth before cleaning)] (1)
The results are shown in Table 2. The cleaning rate is preferably 70% or more.

<(Ease of cleaning) evaluation (evaluation of the slipperiness of clothes when hand-washed)>
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 detergent solution with a concentration of 0.4 mass % of the powder detergent composition. 3 L of the prepared detergent solution was put into a bucket (diameter 41 cm, depth 14 cm, volume 11 L, product name: Polytube 36, Sekisui Techno Molding Co., Ltd.), and three pieces of evaluation clothing (100% cotton T-shirt, product name: YG crew neck T-shirt, product number: YV0013N, manufactured by Gunze Co., Ltd.) were further put in and hand-kneaded five times from each of two directions. The slipperiness of the clothing in hand-washing was sensorily evaluated based on the feel of the clothing during the hand-kneading. Five panelists performed a sensory evaluation of whether the clothing was slippery, and the number of panelists who judged the clothing to be slippery is shown in Table 2. It can be said that the more panelists who judged the clothing to be slippery, the higher the comfort of hand-washing.

Claims (21)

The composition contains 12% by mass or less of the following component (A) and 3% by mass or more and 10% by mass or less of the following component (B),
a mass ratio (a1)/(A) of the content of the following component (a1) to the content of the component (A) is 0.16 or more and 0.70 or less,
A powder detergent composition, wherein a mass ratio (a1)/(B) of a content of the component (a1) to a content of the component (B) is 0.2 or more and 2.0 or less.
Component (A): Anionic surfactant containing the following component (a1) Component (a1): A compound represented by the following general formula (a1): R ^1a -O-(AO) _n -SO ₃ M (a1)
[In the formula, R ^1a is an aliphatic hydrocarbon group having 10 to 18 carbon atoms, AO is an alkyleneoxy group having 2 to 3 carbon atoms, n is the average number of moles of AO added and is a number of 1 to 20, and M is a cation.]
Component (B): One or more alkaline agents selected from inorganic carbonates and inorganic bicarbonates 2. The powder detergent composition according to claim 1, wherein the component (A) further comprises the following component (a2):
Component (a2): Anionic surfactant having a sulfonic acid group or a salt thereof The powder detergent composition according to claim 2, wherein the mass ratio (a2)/(A) of the content of the component (a2) to the content of the component (A) is 0.3 or more and 0.75 or less. The powder detergent composition according to claim 2 or 3, wherein the mass ratio (a2)/(B) of the content of the component (a2) to the content of the component (B) is 0.5 or more and 2.5 or less. The powder detergent composition according to any one of claims 1 to 4, containing 5% by mass or more and 12% by mass or less of component (A). The powder detergent composition according to any one of claims 1 to 5, wherein the mass ratio of the content of component (A) to the content of all surfactants, (A)/(total surfactants), is 0.60 or more and 0.95 or less. The powder detergent composition according to any one of claims 1 to 6, wherein component (B) is at least one selected from sodium carbonate and potassium carbonate. The powder detergent composition according to any one of claims 1 to 7, wherein component (B) contains sodium carbonate, and the content of sodium carbonate in the powder detergent composition is 3% by mass or more and 9% by mass or less. The powder detergent composition according to any one of claims 1 to 8, having a bulk density of 400 g/L or more and 900 g/L or less, measured by the method specified in JIS K 3362:2008. The composition contains the following component (A) in an amount of 5% by mass or more and 12% by mass or less, and the following component (B) in an amount of 3% by mass or more and 10% by mass or less,
a mass ratio (a1)/(A) of the content of the following component (a1) to the content of the component (A) is 0.16 or more and 0.70 or less,
the mass ratio (a1)/(B) of the content of the component (a1) to the content of the component (B) is 0.2 or more and 2.0 or less;
A powder detergent composition, in which the component (B) contains sodium carbonate, and the content of sodium carbonate in the powder detergent composition is 3 mass% or more and 9 mass% or less.
Component (A): Anionic surfactant containing the following component (a1) and component (a2): Component (a1): A compound represented by the following general formula (a1): R ^1a -O-(AO) _n -SO ₃ M (a1)
[In the formula, R ^1a is an aliphatic hydrocarbon group having 10 to 18 carbon atoms, AO is an alkyleneoxy group having 2 to 3 carbon atoms, n is the average number of moles of AO added and is a number of 1 to 20, and M is a cation.]
Component (a2): Anionic surfactant having a sulfonic acid group or a salt thereof Component (B): One or more alkaline agents selected from sodium carbonate and potassium carbonate The composition contains the following component (A) in an amount of 5% by mass or more and 12% by mass or less, and the following component (B) in an amount of 3% by mass or more and 10% by mass or less,
a mass ratio (a1)/(A) of the content of the following component (a1) to the content of the component (A) is 0.16 or more and 0.70 or less,
the mass ratio (a1)/(B) of the content of the component (a1) to the content of the component (B) is 0.2 or more and 2.0 or less;
the component (B) contains sodium carbonate, and the content of sodium carbonate in the powder detergent composition is 3% by mass or more and 9% by mass or less;
A powder detergent composition having a bulk density of 400 g/L or more and 900 g/L or less, as measured by a method specified in JIS K 3362:2008.
Component (A): Anionic surfactant containing the following component (a1) and component (a2): Component (a1): A compound represented by the following general formula (a1): R ^1a -O-(AO) _n -SO ₃ M (a1)
[In the formula, R ^1a is an aliphatic hydrocarbon group having 10 to 18 carbon atoms, AO is an alkyleneoxy group having 2 to 3 carbon atoms, n is the average number of moles of AO added and is a number of 1 to 20, and M is a cation.]
Component (a2): Anionic surfactant having a sulfonic acid group or a salt thereof Component (B): One or more alkaline agents selected from sodium carbonate and potassium carbonate The composition contains the following component (A) in an amount of 5% by mass or more and 12% by mass or less, and the following component (B) in an amount of 3% by mass or more and 10% by mass or less,
a mass ratio (a1)/(A) of the content of the following component (a1) to the content of the component (A) is 0.16 or more and 0.70 or less,
the mass ratio (a1)/(B) of the content of the component (a1) to the content of the component (B) is 0.2 or more and 2.0 or less;
the mass ratio (a2)/(A) of the content of the component (a2) to the content of the component (A) is 0.3 or more and 0.75 or less;
A powder detergent composition, in which the component (B) contains sodium carbonate, and the content of sodium carbonate in the powder detergent composition is 3 mass% or more and 9 mass% or less.
Component (A): Anionic surfactant containing the following components (a1) and (a2) Component (a1): A compound represented by the following general formula (a1): R ^1a -O-(AO) _n -SO ₃ M (a1)
[In the formula, R ^1a is an aliphatic hydrocarbon group having 10 to 18 carbon atoms, AO is an alkyleneoxy group having 2 to 3 carbon atoms, n is the average number of moles of AO added and is a number of 1 to 20, and M is a cation.]
Component (a2): alkylbenzenesulfonic acid or a salt thereof Component (B): one or more alkaline agents selected from sodium carbonate and potassium carbonate The composition contains the following component (A) in an amount of 5% by mass or more and 12% by mass or less, and the following component (B) in an amount of 3% by mass or more and 10% by mass or less,
a mass ratio (a1)/(A) of the content of the following component (a1) to the content of the component (A) is 0.16 or more and 0.70 or less,
the mass ratio (a1)/(B) of the content of the component (a1) to the content of the component (B) is 0.2 or more and 2.0 or less;
the mass ratio (a2)/(A) of the content of the component (a2) to the content of the component (A) is 0.3 or more and 0.75 or less;
the mass ratio (a2)/(B) of the content of the component (a2) to the content of the component (B) is 0.5 or more and 2.5 or less;
A powder detergent composition, in which the component (B) contains sodium carbonate, and the content of sodium carbonate in the powder detergent composition is 3 mass% or more and 9 mass% or less.
Component (A): Anionic surfactant containing the following components (a1) and (a2) Component (a1): A compound represented by the following general formula (a1): R ^1a -O-(AO) _n -SO ₃ M (a1)
[In the formula, R ^1a is an aliphatic hydrocarbon group having 10 to 18 carbon atoms, AO is an alkyleneoxy group having 2 to 3 carbon atoms, n is the average number of moles of AO added and is a number of 1 to 20, and M is a cation.]
Component (a2): alkylbenzenesulfonic acid or a salt thereof Component (B): one or more alkaline agents selected from sodium carbonate and potassium carbonate The composition contains the following component (A) in an amount of 5% by mass or more and 12% by mass or less, and the following component (B) in an amount of 3% by mass or more and 10% by mass or less,
a mass ratio (a1)/(A) of the content of the following component (a1) to the content of the component (A) is 0.16 or more and 0.70 or less,
the mass ratio (a1)/(B) of the content of the component (a1) to the content of the component (B) is 0.2 or more and 2.0 or less;
the mass ratio (a2)/(A) of the content of the component (a2) to the content of the component (A) is 0.3 or more and 0.75 or less;
the mass ratio (a2)/(B) of the content of the component (a2) to the content of the component (B) is 0.5 or more and 2.5 or less;
the mass ratio (A)/(total surfactants) of the content of the component (A) to the content of all surfactants is 0.6 or more and 0.95 or less;
A powder detergent composition, in which the component (B) contains sodium carbonate, and the content of sodium carbonate in the powder detergent composition is 3 mass% or more and 9 mass% or less.
Component (A): Anionic surfactant containing the following components (a1) and (a2) Component (a1): A compound represented by the following general formula (a1): R ^1a -O-(AO) _n -SO ₃ M (a1)
[In the formula, R ^1a is an aliphatic hydrocarbon group having 10 to 18 carbon atoms, AO is an alkyleneoxy group having 2 to 3 carbon atoms, n is the average number of moles of AO added and is a number of 1 to 20, and M is a cation.]
Component (a2): alkylbenzenesulfonic acid or a salt thereof Component (B): one or more alkaline agents selected from sodium carbonate and potassium carbonate The composition contains the following component (A) in an amount of 5% by mass or more and 12% by mass or less, and the following component (B) in an amount of 3% by mass or more and 10% by mass or less,
a mass ratio (a1)/(A) of the content of the following component (a1) to the content of the component (A) is 0.16 or more and 0.70 or less,
the mass ratio (a1)/(B) of the content of the component (a1) to the content of the component (B) is 0.2 or more and 2.0 or less;
the mass ratio (a2)/(A) of the content of the component (a2) to the content of the component (A) is 0.3 or more and 0.75 or less;
the mass ratio (a2)/(B) of the content of the component (a2) to the content of the component (B) is 0.5 or more and 2.5 or less;
the mass ratio (A)/(total surfactants) of the content of the component (A) to the content of all surfactants is 0.6 or more and 0.95 or less;
the component (B) contains sodium carbonate, and the content of sodium carbonate in the powder detergent composition is 3% by mass or more and 9% by mass or less;
A powder detergent composition having a bulk density of 400 g/L or more and 900 g/L or less, as measured by a method specified in JIS K 3362:2008.
Component (A): Anionic surfactant containing the following components (a1) and (a2) Component (a1): A compound represented by the following general formula (a1): R ^1a -O-(AO) _n -SO ₃ M (a1)
[In the formula, R ^1a is an aliphatic hydrocarbon group having 10 to 18 carbon atoms, AO is an alkyleneoxy group having 2 to 3 carbon atoms, n is the average number of moles of AO added and is a number of 1 to 20, and M is a cation.]
Component (a2): alkylbenzenesulfonic acid or a salt thereof Component (B): one or more alkaline agents selected from sodium carbonate and potassium carbonate The powder detergent composition according to any one of claims 1 to 15, which is for hard surfaces and/or textile products. The powder detergent composition according to any one of claims 1 to 15, which is for use on hard surfaces. The powder detergent composition according to any one of claims 1 to 15, which is for use in a bathroom or toilet. The powder detergent composition according to any one of claims 1 to 15, which is for use on textile products. The powder detergent composition according to any one of claims 1 to 15, which is for hard surfaces and textile products. A method for cleaning hard surfaces and/or textile products, comprising cleaning the hard surfaces and/or textile products with a cleaning liquid obtained by mixing the powder detergent composition according to any one of claims 1 to 15 with water.