Powder detergent composition

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

[0001] The present invention relates to a powder detergent composition.

[0002] BACKGROUND ART Household cleaners are used in a variety of places and situations in living environments, and therefore target a wide range of stains, from easily removable stains such as dust and food spills to extremely difficult stains such as denatured oil stains. For example, while strong alkaline cleaning power is required for denatured oil stains in the kitchen, cleaners with reduced surfactant concentrations that do not leave an unpleasant feeling such as sliminess or leave residual foam are required for floors with low soiling loads. Satisfying all of these versatile usability requirements is not easy. Furthermore, cleaning methods for textile products such as clothing can be broadly divided into two types: hand washing and machine washing using a washing machine or the like. While the use of washing machines has been increasing in Asia in recent years, hand washing remains widespread due to factors such as cleaning power, economy, cultural background, and laundry awareness. Hand washing allows the worker to check the degree of stain removal while washing, making it suitable for cleaning not only general stains attached to fibers but also stubborn stains, such as organic stains such as sebum stains on collars and inorganic stains such as mud on socks, as well as for removing stubborn stains. In hand washing, many workers wash textile products using detergents, such as detergent powders dissolved in water, but what is required is not only high detergency but also a smooth feel on the clothes that makes it easy to hand-rub or brush, i.e., a clean feeling. In addition to the foam-removing property (i.e., rinsing property) during rinsing, it is also required that the detergent does not leave an unpleasant feeling such as sliminess, as with hard surfaces.

[0003] JP 2005-213489 A discloses a compound having the following structural formula (I): １ -O-(EO) ｍ -SO ３ -M ＋ [In the formula, R １ is a C8-18 linear or branched alkyl or alkenyl group, m is an average of 0.5 to 4 (however, m=0 is 50% or less by weight), EO is an ethylene oxide group, M ＋indicates a sodium ion or a potassium ion. )], (b) 1 to 9 wt % of a polyoxyalkylene-type nonionic surfactant having an HLB of 9 to 16, (c) 5 to 50 wt % of a zeolite, and (d) 5 to 50 wt % of an alkali metal carbonate, wherein the weight ratio of component (a) to component (b) is (a) / (b)=5.7 / 4.3 to 9.67 / 0.33, and the powder detergent composition exhibits extremely high detergency against stains adhering to clothing and also has an extremely high effect of preventing redeposition of muddy and carbonaceous stains.

[0004] JP 2017-14497 A discloses a powder detergent composition for clothing that has excellent solubility in water, high detergency against oily stains derived from food, and comfortable hand-washing, and that contains the following component (a) in an amount of 3% by mass or more and 30% by mass or less, component (b) in an amount of 30% by mass or more and 80% by mass or less, and component (c) in an amount of 0% by mass or more and 10% by mass or less, and in which the mass ratio of the content of component (b1) to the total content of components (b1) and (b2), (component (b1) / [component (b1)+component (b2)]), is 0.4 or more and 1 or less. Component (a): an 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 hydrogencarbonates, alkali metal silicates, and tripolyphosphates

[0005] U.S. Patent Application Publication No. 2016 / 0289598 discloses a free-flowing particulate laundry detergent composition comprising (a)(i) 0.5 wt % to 20 wt % of AES particles containing 40 wt % to 60 wt % of a partially ethoxylated alkyl sulfate-based anionic detersive surfactant, which provides improved cleaning performance and fragrance performance in laundry detergent powder products.

[0006] As described above, for both hard surfaces and textile applications, detergent compositions must have both high detergency and high rinsability, and it is considered preferable that the detergent composition also has a cleaning feel and eliminates a slimy feeling. However, while powder detergent compositions are advantageous in terms of achieving high detergency and a cleaning feel, if the content of an anionic surfactant or alkaline agent is high, there is a trade-off between the deterioration of rinsability and the slimy feeling, which is problematic.

[0007] The present invention provides a powder detergent composition that combines good cleansing performance, particularly good cleansing performance for thermally denatured oily soils or sebum soils, with good rinsing performance, and also has a good cleaning feel and reduced stickiness. In the present invention, the cleaning feel is defined as the ability to make the target surface slippery when kneading or washing with a brush by reducing the coefficient of friction between the hand or brush and the target surface, thereby making the target surface feel easier to clean.

[0008] The present invention relates to a powder detergent composition containing 12 mass% or less of the following component (A) and 3 mass% to 10 mass% or less of the following component (B), wherein the mass ratio (a1) / (A) of the content of the following component (a1) to the content of the component (A) is 0.16 to 0.70, and the mass ratio (a1) / (B) of the content of the component (a1) to the content of the component (B) is 0.2 to 2.0. 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) [wherein, R １ａ is an aliphatic hydrocarbon group having from 10 to 18 carbon atoms, AO is an alkyleneoxy group having from 2 to 3 carbon atoms, n is the average number of moles of AO added and is a number of from 1 to 20, and M is a cation.] Component (B): one or more alkali agents selected from inorganic carbonates and inorganic hydrogen carbonates

[0009] The present invention also relates to a powder detergent composition comprising the following component (A) in an amount of 5 to 12 mass % and the following component (B) in an amount of 3 to 10 mass %, wherein the mass ratio (a1) / (A) of the content of the following component (a1) to the content of the component (A) is 0.16 to 0.70, and the mass ratio (a1) / (B) of the content of the component (a1) to the content of the component (B) is 0.2 to 2.0, and the component (B) contains sodium carbonate, and the content of sodium carbonate in the powder detergent composition is 3 to 9 mass %. Component (A): An anionic surfactant comprising the following component (a1) and the following component (a2): Component (a1): A compound represented by the following general formula (a1): R １ａ -O-(AO) ｎ -SO ３ M (a1) [wherein, R １ａ is an aliphatic hydrocarbon group having from 10 to 18 carbon atoms, AO is an alkyleneoxy group having from 2 to 3 carbon atoms, n is the average number of moles of AO added and is a number of from 1 to 20, and M is a cation.] Component (a2): an anionic surfactant having a sulfonic acid group or a salt thereof Component (B): one or more alkali agents selected from sodium carbonate and potassium carbonate

[0010] The present invention also relates to a powder detergent composition comprising the following: component (A) in an amount of 5 to 12 mass% by mass; and component (B) in an amount of 3 to 10 mass% by mass; the mass ratio (a1) / (A) of the content of component (a1) to the content of component (A) is 0.16 to 0.70; the mass ratio (a1) / (B) of the content of component (a1) to the content of component (B) is 0.2 to 2.0; component (B) contains sodium carbonate, and the content of sodium carbonate in the powder detergent composition is 3 to 9 mass% by mass; and the bulk density measured by the method specified in JIS K 3362:2008 is 400 to 900 g / L. Component (A): an anionic surfactant comprising the following component (a1) and the following component (a2): Component (a1): a compound represented by the following general formula (a1): R １ａ -O-(AO) ｎ -SO ３ M (a1) [wherein, R １ａis an aliphatic hydrocarbon group having from 10 to 18 carbon atoms, AO is an alkyleneoxy group having from 2 to 3 carbon atoms, n is the average number of moles of AO added and is a number of from 1 to 20, and M is a cation.] Component (a2): an anionic surfactant having a sulfonic acid group or a salt thereof Component (B): one or more alkali agents selected from sodium carbonate and potassium carbonate

[0011] The present invention also relates to a powder detergent composition containing the following component (A) in an amount of 5 to 12 mass% by mass and the following component (B) in an amount of 3 to 10 mass% by mass, wherein the mass ratio (a1) / (A) of the content of the following component (a1) to the content of the component (A) is 0.16 to 0.70, the mass ratio (a1) / (B) of the content of the component (a1) to the content of the component (B) is 0.2 to 2.0, and the mass ratio (a2) / (A) of the content of the component (a2) to the content of the component (A) is 0.3 to 0.75, and the component (B) contains sodium carbonate, and the content of sodium carbonate in the powder detergent composition is 3 to 9 mass% by mass. Component (A): An 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) [wherein, R １ａ is an aliphatic hydrocarbon group having from 10 to 18 carbon atoms, AO is an alkyleneoxy group having from 2 to 3 carbon atoms, n is the average number of moles of AO added and is a number of from 1 to 20, and M is a cation.] Component (a2): alkylbenzenesulfonic acid or a salt thereof Component (B): one or more alkali agents selected from sodium carbonate and potassium carbonate

[0012] The present invention also relates to a powder detergent composition comprising the following: component (A) in an amount of 5 to 12 mass% and component (B) in an amount of 3 to 10 mass%; a mass ratio (a1) / (A) of the content of component (a1) to the content of component (A) is 0.16 to 0.70; a mass ratio (a1) / (B) of the content of component (a1) to the content of component (B) is 0.2 to 2.0; a mass ratio (a2) / (A) of the content of component (a2) to the content of component (A) is 0.3 to 0.75; a mass ratio (a2) / (B) of the content of component (a2) to the content of component (B) is 0.5 to 2.5; and the component (B) contains sodium carbonate, and the content of sodium carbonate in the powder detergent composition is 3 to 9 mass%. Component (A): An 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) [wherein, R １ａ is an aliphatic hydrocarbon group having from 10 to 18 carbon atoms, AO is an alkyleneoxy group having from 2 to 3 carbon atoms, n is the average number of moles of AO added and is a number of from 1 to 20, and M is a cation.] Component (a2): alkylbenzenesulfonic acid or a salt thereof Component (B): one or more alkali agents selected from sodium carbonate and potassium carbonate

[0013] The present invention also provides a composition comprising: an (A) component in an amount of 5% by mass or more and 12% by mass or less; and a (B) component in an amount of 3% by mass or more and 10% by mass or less; wherein the mass ratio (a1) / (A) of the content of the (a1) component to the content of the (A) component is 0.16 or more and 0.70 or less; the mass ratio (a1) / (B) of the content of the (a1) component to the content of the (B) component is 0.2 or more and 2.0 or less; the mass ratio (a2) / (A) of the content of the (a2) component to the content of the (A) component is 0.3 or more and 0.75 or less; the mass ratio (a2) / (B) of the content of the (a2) component to the content of the (B) component is 0.5 or more and 2.5 or less; the mass ratio (A) / (total surfactants) of the content of the (A) component to the content of all surfactants is 0.6 or more and 0.95 or less; The present invention relates to a powder detergent composition, wherein 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. Component (A): An 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) [wherein, R １ａ is an aliphatic hydrocarbon group having from 10 to 18 carbon atoms, AO is an alkyleneoxy group having from 2 to 3 carbon atoms, n is the average number of moles of AO added and is a number of from 1 to 20, and M is a cation.] Component (a2): alkylbenzenesulfonic acid or a salt thereof Component (B): one or more alkali agents selected from sodium carbonate and potassium carbonate

[0014] The present invention also provides a composition comprising: an (A) component in an amount of 5% by mass or more and 12% by mass or less; and a (B) component in an amount of 3% by mass or more and 10% by mass or less; wherein the mass ratio (a1) / (A) of the content of the (a1) component to the content of the (A) component is 0.16 or more and 0.70 or less; the mass ratio (a1) / (B) of the content of the (a1) component to the content of the (B) component is 0.2 or more and 2.0 or less; the mass ratio (a2) / (A) of the content of the (a2) component to the content of the (A) component is 0.3 or more and 0.75 or less; the mass ratio (a2) / (B) of the content of the (a2) component to the content of the (B) component is 0.5 or more and 2.5 or less; the mass ratio (A) / (total surfactants) of the content of the (A) component to the content of all surfactants is 0.6 or more and 0.95 or less; The present invention relates to a powder detergent composition, wherein the component (B) contains sodium carbonate, the content of sodium carbonate in the powder detergent composition is 3% by mass or more and 9% by mass or less, and the bulk density measured according to the method specified in JIS K 3362:2008 is 400 g / L or more and 900 g / L or less. Component (A): An 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) [wherein, R １ａ is an aliphatic hydrocarbon group having from 10 to 18 carbon atoms, AO is an alkyleneoxy group having from 2 to 3 carbon atoms, n is the average number of moles of AO added and is a number of from 1 to 20, and M is a cation.] Component (a2): alkylbenzenesulfonic acid or a salt thereof Component (B): one or more alkali agents selected from sodium carbonate and potassium carbonate

[0015] The present invention also relates to a method for cleaning hard surfaces and / or textile products, which comprises cleaning the hard surfaces and / or textile products with a cleaning liquid prepared by mixing the powder detergent composition of the present invention with water.

[0016] According to the present invention, there is provided a powder detergent composition which has both good cleaning properties, particularly good cleaning properties for thermally denatured oily stains or sebum stains, and good rinsing properties, and which also has a good cleaning feel and reduced stickiness.

[0017] Modes for Carrying Out the Invention The reason why the powder detergent composition of the present invention achieves four elements, namely, good cleansing performance, particularly for cleaning heat-denatured oily soils or sebum soils, 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 cleansing performance and rinsing performance, it is essential to incorporate a certain amount of component (a1), which has excellent cleansing performance but has issues with rinsing performance, and component (A) containing component (a1). If a large amount of soda ash is incorporated to resolve this trade-off, the cleaning feel and sticky feeling will deteriorate. Therefore, by optimally controlling the mass ratios (a1) / (A) and (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 cleansing feel is produced by the (a1) component is that the (A) component combines with hardness components in tap water to form scum of the (A) component, reducing the inherent slipperiness of the (A) component, but that the inclusion of the (a1) component as the (A) component inhibits the (A) component from becoming scum, and the slipperiness is produced, thereby producing a good cleansing feel. Furthermore, it is presumed that the mechanism by which the sticky feel caused by the (B) component worsens is that the incorporation of a large amount of the (B) component makes the cleansing solution alkaline, promoting the swelling of the keratin in the human skin, which is perceived as a sticky feel on the skin, and therefore it is necessary to limit the content of the (B) component.

[0018] [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) [wherein, R １ａ is an aliphatic hydrocarbon group having from 10 to 18 carbon atoms, AO is an alkyleneoxy group having from 2 to 3 carbon atoms, n is the average number of moles of AO added and is a number from 1 to 20, and M is a cation.

[0019] In the component (a1), in the general formula (a1), R １ａis an aliphatic hydrocarbon group, preferably an alkyl or alkenyl group, more preferably an alkyl group, having 10 or more carbon atoms, preferably 12 or more, and 18 or less, preferably 16 or less, from the viewpoint of cleansing performance, particularly cleansing performance 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 cleansing performance, particularly cleansing performance for heat-denatured oily soils or sebum soils and cleaning feel. 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 alkanolammonium ions having 1 to 3 alkanol groups having 2 or 3 carbon atoms (for example, monoethanolammonium ion, diethanolammonium ion, triethanolammonium ion, triisopropanolammonium ion, etc.).

[0020] From the viewpoints of rinsing properties and powder formulation, the powder detergent composition of the present invention preferably further contains the following component (a2) as the component (A): Component (a2): an anionic surfactant having a sulfonic acid group or a salt thereof.

[0021] Examples of component (a2) include one or more anionic surfactants selected from alkylbenzenesulfonic acids, olefinsulfonic acids, alkanesulfonic acids, alkyl or alkenyl sulfosuccinate esters, and salts thereof. The carbon number of the alkyl or alkenyl group in these anionic surfactants is, for example, 8 to 22 carbon atoms. Examples of counter ions to the anionic groups in 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 1 to 3 alkanol groups each having 2 or 3 carbon atoms (e.g., monoethanolammonium ions, diethanolammonium ions, triethanolammonium ions, triisopropanolammonium ions, etc.).

[0022] From the viewpoint of further enhancing rinsing properties when used in combination with the aforementioned component (a1) and from the viewpoint of ease of formulation into a powder, the component (a2) is preferably alkylbenzenesulfonic acid or a salt thereof. From the viewpoint of detergency, 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.

[0023] From the viewpoint of rinsing performance, 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 a salt thereof (excluding those corresponding to component (a1)).

[0024] From the viewpoint of cleaning performance, 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 still more preferably 14 or less. From the viewpoint of cleaning performance, 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 counter ions to the anionic group of component (a3) ​​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 ammonium ions having 1 to 3 alkanol groups each having 2 or 3 carbon atoms (for example, monoethanolammonium ion, diethanolammonium ion, triethanolammonium ion, triisopropanolammonium ion, etc.).

[0025] <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.

[0026] 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.

[0027] 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.

[0028] From the viewpoint of cleansing properties, particularly cleansing properties for thermally denatured oily stains or sebum stains, and the ability to prepare powder formulations, 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.

[0029] <Composition, etc.> From the viewpoint of cleaning performance, particularly cleaning performance and rinsing performance for thermally denatured oily soils or sebum soils, the powder detergent composition of the present invention contains component (A) in an amount of 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. Furthermore, from the viewpoint of being a preferred detergent 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% 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) is expressed as a value converted into the sodium salt. Similarly, the masses of components (a1), (a2), and (a3) ​​contained in component (A) are expressed as values ​​converted into the sodium salts. Furthermore, the powder detergent composition of the present invention may contain the component (a1), the optional component (a2), or the optional component (a3) ​​by blending them together.

[0030] 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 detergency, particularly detergency for thermally denatured oily soils or sebum soils, rinsing ability, and cleaning feeling.

[0031] 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, from the viewpoints of detergency, particularly detergency for thermally denatured oily soils or sebum soils, rinsing ability, cleaning feel, and powder formulation, 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.

[0032] From the viewpoint of cleaning performance, particularly cleaning performance for thermally denatured oily soils or sebum soils, and removal of stickiness, the powder detergent composition of the present invention contains component (B) in an amount of 3 mass % or more, preferably 4 mass % or more, more preferably 4.5 mass % or more, and 10 mass % or less, preferably 9 mass % or less, more preferably 8 mass % or less, even more preferably 7 mass % or less, and still more preferably 6 mass % or less.

[0033] When the powder detergent composition of the present invention contains sodium carbonate as component (B), from the viewpoints of cleansing ability, particularly cleansing ability 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 still more preferably 6% by mass or less.

[0034] 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, from the viewpoints of detergency, particularly detergency of thermally denatured oily soils or sebum soils, suppression of stickiness, and cleaning feel, 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.

[0035] 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 detergency, particularly detergency of thermally denatured oily soils or sebum soils, cleaning feel, rinsing ability, and suppression of stickiness, 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, still more preferably 1.5 or less, still more preferably 1.1 or less, and still more preferably 0.9 or less.

[0036] The powder detergent composition of the present invention may contain surfactants other than component (A) to the extent that the effects of the present invention are not impaired. From the viewpoints of detergency and rinsing performance, the total surfactant content in the powder detergent composition of the present invention 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 viewpoints of detergency, particularly detergency and rinsing performance of thermally denatured oily soils or sebum soils, and of powder formulation, the mass ratio (A) / (total surfactants) of the content of component (A) to the content of all surfactants is preferably 0.60 or more, more preferably 0.70 or more, even more preferably 0.80 or more, and preferably 1.0 or less, more preferably 0.95 or less, and even more preferably 0.90 or less.

[0037] From the viewpoint of detergency, particularly for detergency of heat-denatured oily soils or sebum soils, and from the viewpoint of 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 3,000 or more.

[0038] Examples of component (C) include one or more polymers selected from polyacrylic acid or its salts, and copolymers of acrylic acid and maleic acid or their salts (hereinafter referred to as component (c1)), and carboxymethyl cellulose or its salts (hereinafter referred to as component (c2)). Examples of polyacrylic acid or its salts include one or more polymers selected from polyacrylic acid, sodium polyacrylate, potassium polyacrylate, etc., preferably one or more polymers selected from sodium polyacrylate and potassium polyacrylate. Examples of copolymers of acrylic acid and maleic acid or their salts include one or more polymers selected from copolymers of acrylic acid and maleic acid, sodium salts of copolymers of acrylic acid and maleic acid, potassium salts of copolymers of acrylic acid and maleic acid, etc., preferably one or more polymers selected from sodium salts of copolymers of acrylic acid and maleic acid, and potassium salts of copolymers of acrylic acid and maleic acid. The molar ratio of the copolymer of acrylic acid and maleic acid, in terms of moles of acrylic acid / moles of maleic acid, is preferably 1 / 99 or more, more preferably 10 / 90 or more, and preferably 99 / 1 or less, more preferably 90 / 10 or less.

[0039] Component (c1) may be a copolymer containing a monomer other than acrylic acid and maleic acid that is copolymerizable with acrylic acid and / or maleic acid, as long as the effects of the present invention are not impaired. 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, and styrene monomers, and more specifically, methacrylic acid, methyl acrylate, ethyl acrylate, methyl methacrylate, and styrene. The molar ratio of the monomer other than acrylic acid and maleic acid that is copolymerizable with acrylic acid and / or maleic acid in component (c1) 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 containing, among all constituent monomers, monomers other than acrylic acid and maleic acid that are copolymerizable with acrylic acid and / or maleic acid in an amount ranging from 0 mol % to 5 mol %.

[0040] The weight average molecular weight of 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 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 more, preferably 0.3 or more, and 0.8 or less, preferably 0.6 or less. This 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 component (c) is measured by GPC (gel permeation chromatography), and the weight average molecular weight (Mw) can be determined using a conversion standard. The GPC measurement conditions are shown below. Column: Tosoh Corporation, trade name: TSK-GEL guard PWXL Tosoh Corporation, trade name: TSK-GEL G4000 PWXL Tosoh Corporation, trade name: TSK-GEL G2500 PWXL Mobile phase: 0.1 mol / L aqueous solution of potassium dihydrogen phosphate and 0.1 mol / L sodium dihydrogen phosphate / acetonitrile = 90 / 10 (volume ratio) Detector: differential refractive index detector Column temperature: 40°C Flow rate: 1.0 mL / min Conversion standard substance: polyacrylic acid (American Standard Corporation) Sample: Ion-exchanged water was added to an aqueous polymer solution containing 0.8 g of solids to bring the total liquid volume to 200 mL, and 10 μL was taken from this prepared solution and injected into the column.

[0041] When the powder detergent composition of the present invention contains component (C), from the viewpoints of detergency, particularly detergency for thermally denatured oily soils or sebum soils, and 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 component (C) is expressed as a value converted into a sodium salt.

[0042] From the viewpoint of detergency, particularly for detergency of heat-denatured oily soils or sebum soils, and from the viewpoint of preparation into a powder formulation, the powder detergent composition of the present invention may contain an alkali metal silicate as component (D), which may be one or more selected from sodium silicate and potassium silicate.

[0043] When the powder detergent composition of the present invention contains component (D), from the viewpoints of detergency, particularly detergency for thermally denatured oily soils or sebum soils, and the feasibility of preparing a powder formulation, the powder detergent composition of the present invention 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, still 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 still more preferably 10% by mass or less.

[0044] 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. Component (E) may be one or more compounds selected from sodium sulfate, magnesium sulfate, sodium chloride, and magnesium chloride. Component (E) may be either a hydrate or an anhydrous form.

[0045] When the powder detergent composition of the present invention contains the component (E), the component (E) is contained 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, even more preferably 80% by mass or less, of the composition.

[0046] The powder detergent composition of the present invention may contain water. The water may be deionized water (sometimes 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 relative to ion-exchanged water. Tap water may also be used. When the powder detergent composition of the present invention contains water, the water content is preferably 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.

[0047] The powder detergent composition of the present invention may contain 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 (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 suppressors (silicones, etc.), organic solvents, enzymes (cellulase, protease, peptinase, lipase, dextranase, amylase, etc.), fragrances, colorants, etc. (however, excluding those corresponding to components (A) to (E)).

[0048] When 1 g of the powder detergent composition of the present invention is diluted to 1,000 g with ion-exchanged 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 viewpoints of detergency, particularly detergency of thermally denatured oily soils or sebum soils, and removal of stickiness. In the present invention, the pH is measured according to the pH measurement method described below. <pH Measurement Method> A pH measurement composite electrode (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 aqueous potassium chloride solution (3.33 mol / L) is used as the internal solution of the pH electrode. Next, a 100 mL beaker is filled with a pH 4.01 standard solution (phthalate standard solution), a pH 6.86 (neutral phosphate standard solution), and a pH 9.18 standard solution (borate standard solution), and the beaker is immersed in a thermostatic bath at 25°C for 30 minutes. A pH measurement electrode is immersed in the thermostatically adjusted standard solution for 3 minutes, and calibration is performed in the order pH 6.86 → pH 9.18 → pH 4.01. The sample to be measured is adjusted to 25°C, and the electrode of the pH meter is immersed in the sample, and the pH is measured after 1 minute.

[0049] 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.

[0050] From the viewpoint of flowability of the powder detergent composition, the powder detergent composition of the present invention has an average particle size of 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, still more preferably 450 μm or less, and still more preferably 400 μm or less. Here, the average particle size is determined from the mass fraction based on the sieve opening size after vibrating the powder detergent composition for 5 minutes using a standard sieve specified in JIS Z 8801.

[0051] The powder detergent composition of the present invention can be produced by a known method, for example, spray drying, dry neutralization, dry granulation, dry blending, fluidized bed drying, thin film drying, extrusion granulation, tumbling granulation, stirring granulation, compaction granulation, surfactant loading method, or a combination of methods selected from these.

[0052] 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 combines good cleaning performance, particularly for cleaning heat-denatured oily soils or sebum soils, with good rinsing properties, and also provides a good cleaning feel with reduced stickiness. Therefore, the powder detergent composition of the present invention 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.

[0053] The hard surfaces to be cleaned with the powder detergent composition of the present invention are preferably used in bathrooms, kitchens, or toilets, and more preferably in 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.). The powder detergent composition of the present invention can also 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.). 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, motorcycles, and bicycles. The hard surface material that can be treated with the powder detergent composition of the present invention includes hard surfaces made of one or more materials selected from the group consisting of plastics, ceramics, metals, wood, glass, rubber, and carbon materials.

[0054] 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-based fibers (such as milk protein casein fiber and Promix), polyamide-based fibers (such as nylon), polyester-based fibers (such as polyester), polyacrylonitrile-based fibers (such as acrylic), polyvinyl alcohol-based fibers (such as vinylon), polyvinyl chloride-based fibers (such as polyvinyl chloride), polyvinylidene chloride-based fibers (such as vinylidene), polyolefin-based fibers (such as polyethylene and polypropylene), polyurethane-based fibers (such as polyurethane), polyvinyl chloride / polyvinyl alcohol copolymer-based fibers (such as polycral), polyalkylene paraoxybenzoate-based fibers (such as benzoate), polyfluoroethylene-based fibers (such as polytetrafluoroethylene), glass fibers, carbon fibers, alumina fibers, silicone carbide fibers, rock fibers, slag fibers, and metal fibers (gold thread, silver thread, steel fiber). 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 silkworm silk, wild silkworm silkworm silk), feathers, cellulosic fibers (rayon, polynosic, cupra, acetate, etc.), etc. From the viewpoint of finish quality, the fiber is preferably a fiber containing cotton fiber. From the viewpoint of cleansing ability, particularly cleansing ability for sebum stains, the content of cotton fibers 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, 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.

[0055] In the present invention, the textile product means fabrics such as woven fabrics, knitted fabrics, and nonwoven fabrics using the hydrophobic fibers or hydrophilic fibers, and products obtained using the same, such as undershirts, T-shirts, dress shirts, blouses, slacks, hats, handkerchiefs, towels, knitwear, socks, underwear, and tights.

[0056] [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 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.

[0057] 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 viewpoints of cleaning performance, particularly cleaning performance and rinsing performance of thermally denatured oily stains or sebum stains.

[0058] 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 temperature of the cleaning liquid of the present invention may also be within the above-mentioned range. The temperature of water used in the cleaning method, such as water used for rinsing, may also be within the above-mentioned range.

[0059] The pH of the cleaning solution of the present invention at 25° C. is preferably 9.0 or more, more preferably 9.5 or more, even more preferably 9.9 or more, from the viewpoint of detergency, particularly detergency of heat-denatured oily soils or sebum soils, and removal of stickiness, 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 measurement method described above in the embodiment of the powder detergent composition of the present invention.

[0060] 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 rubbing the textile product with hands, a method of pushing the textile product, and a method of rubbing the textile products together with hands.

[0061] 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 washed in a washing machine. Examples of washing machines include vertical washing machines, two-layer washing machines, drum washing machines, pulsator washing machines, agitator washing machines, and compact washing machines. These washing machines can be commercially available for home use.

[0062] 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 liquor ratio, which is the ratio of the mass (kg) of the textile product to the volume (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 volume (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, still more preferably 15 or more, and preferably 45 or less, more preferably 40 or less, even more preferably 30 or less, and still more preferably 20 or less, from the viewpoints of cleaning performance and economy.

[0063] 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 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 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 is preferably 1 hour or less, more preferably 45 minutes or less, and even more preferably 30 minutes or less from the viewpoint of preventing damage to the textile product. After washing the textile product, rinsing and dehydration can be carried out. Rinsing and dehydration can be carried out by hand washing or using a washing machine. Rinsing and dehydration can be carried out alternately multiple times. After rinsing and dehydration, drying can be carried out. Drying can be either natural drying or heat drying. Each drying can be carried out multiple times.

[0064] In the method for cleaning hard surfaces and / or textile products of the present invention, when the surface 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, and immersion, with coating or spraying being preferred. After contacting the hard surface with the cleaning solution of the present invention, the hard surface is scrubbed using a cleaning aid such as a sponge or brush, or with the hands, etc.

[0065] 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 liquid of the present invention is applied to an area of ​​100 cm of the hard surface to be cleaned. ２ From the viewpoint of cleansing properties, particularly the cleansing and rinsing properties of thermally denatured oily soils or sebum soils, the amount of the agent applied or sprayed is 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.

[0066] 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 hard surface with the cleaning solution of the present invention is preferably 10 seconds or more, more preferably 20 seconds or more, even more preferably 30 seconds or more, and even more preferably 40 seconds or more, from the viewpoint of enhancing detergency, and from the same viewpoint, is preferably 60 minutes or less, more preferably 30 minutes or less, even more preferably 20 minutes or less, and even more preferably 10 minutes or less. During 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 with a cleaning aid such as a finger, a sponge, or a brush, or the hard surface may be left as is. After contact with the cleaning solution of the present invention and, if necessary, after a predetermined period of contact, the hard surface is rinsed with water. When rinsing, an external force (physical force) may be applied to the hard surface by rubbing with a cleaning aid such as a finger, a sponge, or a brush, or the hard surface may simply be rinsed with a stream of water.

[0067] Examples [Components] The following components were used in the examples and comparative examples. <Component (A)> ES: Polyoxyethylene lauryl ether sodium sulfate, EMAL 270J, manufactured by Kao Corporation, component (a1) LAS: Sodium lauryl benzene sulfonate, Neopelex 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 of 10,000 <Component (D)> Crystalline silicate: Sodium silicate, "No. 2 silicate" manufactured by Fuji Chemical Co., Ltd., purity 40%, the figures in the table indicate purity values ​​<Component (E)> Sodium sulfate: Anhydrous neutral Glauber's salt, manufactured by Shikoku Chemical Industry Co., Ltd. <Other Components> Bentonite: Kunipia F, manufactured by Kunimine Industries Co., Ltd. Fluorescent dye: Chinopal CBS, manufactured by Chiba Specialty Chemicals Polyethylene glycol: weight average molecular weight 13,000, manufactured by SINO-Japan

[0068] [Preparation of Powdered Detergent Compositions] The above ingredients were kneaded to prepare the powdered detergent compositions shown in Tables 1 and 2. Specifically, component (A) was freeze-dried in advance and then 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 uniform, and the other ingredients were added and further stirred thoroughly to obtain powdered detergent compositions with the formulations shown in Tables 1 and 2. The mass % of each ingredient in Tables 1 and 2 is based on the active ingredient. The bulk density of each powdered detergent composition prepared was 500 to 800 g / L as measured by the method specified in JIS K 3362:2008, and the average particle size, calculated from the mass fraction based on the sieve opening size after 5 minutes of vibration using a standard sieve specified in JIS Z 8801, was 300 μm. 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 powder detergent composition of the present invention.

[0069] Example 1, Comparative Example 1: Evaluation for Hard Surface Use <Rinsing Ability (Foam Removal Ability)> Each powder detergent composition in Table 1 was diluted with 10°DH hard water to 4 g / L, 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 back and forth in one direction 10 times for 10 seconds with a brush (product name: Kitchen Brush No. 36, brush width: 4 mm, manufactured by Daiso Industries Co., Ltd.). The soiling of the substrate was evaluated using an additive-free system. Then, 10 mL of water in a 50 mL beaker was gently poured over the surface of the substrate, and the rinsing ability (foam removal ability) was visually evaluated according to the following evaluation criteria. The results are shown in Table 1. Evaluation criteria: A: No foam remained on the substrate. B: Almost no foam remains on the substrate. C: Some foam remains on the substrate. A is the most excellent in rinsing property (foam removal), and is superior to B, which is also superior to C in rinsing property (foam removal).

[0070] <Slippery Feeling Evaluation> Each powder detergent composition in Table 1 was diluted with 10°DH hard water to 4 g / L, and 20 mL of each cleaning solution was applied to a substrate (the same substrate as used in the rinsing performance evaluation). The substrate was then scrubbed back and forth in one direction 10 times for 10 seconds with a brush (the same brush as used in the rinsing performance evaluation). Then, 10 mL of water in a 50 mL beaker was gently poured over the surface of the substrate. Five panelists then rubbed the substrate with their fingers 10 times to evaluate the slippery feel. The number of panelists who judged the substrate to be non-slip and slippery is shown in Table 1. The more panelists who judged the substrate to be non-slip and slippery, the more comfortable the hand-washing experience.

[0071] <Detergency Evaluation> 200 μL of rapeseed oil (manufactured by Wako Pure Chemical Industries, Ltd.) was applied to a substrate (the same substrate used in the rinsing evaluation) 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 solution was applied to the substrate. The substrate was then scrubbed with a brush (the same brush used in the rinsing evaluation) by scrubbing back and forth in one direction 10 times for 10 seconds. The cleaned, uncleaned, and uncoated substrates were stained with Sudan III (manufactured by Wako Pure Chemical Industries, Ltd., Grade 1) and the gray values ​​were calculated using ImageJ. The cleaning rate for the denatured oil stains was calculated according to Equation (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)

[0072] <(Easy) Cleaning Feel Evaluation (Evaluation of Brush Smoothness During Brush Cleaning)> Each powder detergent composition in Table 1 was dissolved in water adjusted to a German hardness of 10° dH at 25°C to prepare 1 L of cleaning solution with a powder detergent composition concentration of 0.4 mass %. 20 mL of each cleaning solution was applied to a substrate (the same substrate as used in the rinsing performance evaluation), and the substrate was scrubbed back and forth in one direction with a brush (the same brush as used in the rinsing performance evaluation) 10 times for 10 seconds. The brush's smoothness was evaluated sensorily based on the feel of the brush during the cleaning. Five panelists judged whether the brush felt smooth, and the number of panelists who judged the brush to be smooth is shown in Table 1. The more panelists who judged the brush to be smooth, the more comfortable the brush cleaning experience.

[0073]

[0074] [Example 2 and Comparative Example 2: Evaluation of textile product applications] <Evaluation of rinsing ability (foam removal ability)> 1. Preparation of artificial sebum-stained fabric 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 an amount such that the mass percentages in the artificial soiling were 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 105 mg of calcium chloride dihydrate and dissolving it in distilled water to make 1,000 mL. C: Egg white lecithin liquid crystal substance 1.98% by mass (egg white lecithin liquid crystal substance 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 prepared by gravure coating 100 mg of artificial dirt consisting of the above composition onto a 6 cm x 6 cm cotton / polyester broadcloth blend dyed fabric (cotton / polyester ratio = 35 / 65, purchased from Tanigashira Shoten).

[0075] 2. Preparation of Mud-Stained Fabric The mud-stained fabric used for evaluation was prepared using the following procedure. This method adheres particles between fibers through re-contamination, resulting in a stain that is more difficult to remove than fabrics stained with a regular mud coating. The mud used was Kanuma Akadama garden soil, dried at 120°C ± 5°C for 4 hours, 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 subjected to ultrasonic waves for 15 minutes. The mixture was transferred to a tergotometer, and 15 g of cotton knitted fabric (purchased from Tanigashira Shoten, 6 cm x 6 cm) was added. The mixture was then stirred at 20°C, 100 rpm, and 20 minutes. The fabric was then rinsed with running water for 1 minute, dehydrated for 1 minute, and air-dried overnight to prepare a mud-stained fabric.

[0076] 3. Evaluation of Rinsing Ability (Foam Removal Ability) Three liters 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 to achieve a German hardness of 10°dH (Ca / Mg = 7 / 3, mass ratio), adding sodium bicarbonate to achieve an alkalinity of 60 mg / L, and adjusting the pH to 7 with hydrochloric acid. Next, 12 g of each powder detergent composition listed 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-shirts, product name: YG Crew Neck T-shirt, product number: YV0013N, manufactured by Gunze 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 cloths were rubbed for 15 seconds and the mud-stained cloths for 30 seconds per piece of evaluation clothing (one round trip (approximately 1 second) of rubbing the fabrics together was counted as one rub). The evaluation clothing was then removed and wrung out 10 cm above the washbasin so that the moisture content of the evaluation clothing was approximately 100 to 140% by mass of the evaluation clothing. 3 L of the above model water at a temperature of 30°C was poured into another model circular washbasin. Three pieces of evaluation clothing whose moisture content had been wrung out were placed therein, and the evaluation clothing was then loosened in the model water. Each loosened evaluation clothing was then lifted out of the water bath by holding it by its collar (lifted out of the water bath 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 process was repeated 10 times for each test garment, and then the test garments were squeezed 10 cm above the washbasin so that the moisture content of the test garments was approximately 100-140% of the underwear. The state of the rinse water immediately after rinsing and spin-drying of the three test garments was observed, and rinsing performance was evaluated using the following evaluation criteria. The results are shown in Table 2. Evaluation criteria A: No foam remained on the surface of the water in the tub. B: Almost no foam remained on the surface of the water in the tub. C: Some foam remained on the surface of the water in the tub. A is the best rinsing performance (foam removal), better than B, and B is better than C in rinsing performance (foam removal).

[0077] <Evaluation of Stickiness> After the above-mentioned evaluation of rinsing property (foam rinse-off), five panelists put both hands into each 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 to hand wash.

[0078] <Detergency Evaluation> Each powder detergent composition in Table 2 was dissolved in water adjusted to a German hardness of 10° dH at 25°C to prepare 1 L of a cleaning solution containing 0.4 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 and immersed for 30 minutes. Then, they were washed for 3 minutes at 180 rpm using a Tergotometer (MS-8212, manufactured by Ueshima Co., Ltd., inner diameter 12 cm, height 17.5 cm). After washing, the cloths were rinsed for 1 minute with the same water used to prepare the cleaning solution. The detergency was evaluated based on the cleaning rate (%) calculated according to the following formula (1). Specifically, the reflectance of the original cloth before artificial sebum staining 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 according to the following formula (1). The cleaning rate result is the average of the calculation results for four pieces of artificial sebum-stained cloth. The higher the cleaning rate, the better the cleaning performance. Cleaning rate (%) = 100 x [(reflectance of artificial sebum-stained cloth after washing - reflectance of artificial sebum-stained cloth before washing) / (reflectance of original cloth - reflectance of artificial sebum-stained cloth before washing)] (1) The results are shown in Table 2. A cleaning rate of 70% or more is preferable.

[0079] <(Easy) Cleaning Feel Evaluation (Evaluation of Slipperiness of Clothing in Hand-Washing)> Each powder detergent composition in Table 2 was dissolved in water adjusted to a German hardness of 10° dH at 25°C to prepare 3 L of cleaning solution containing 0.4 mass% of the powder detergent composition. 3 L of the prepared cleaning solution was placed in a bucket (diameter 41 cm, depth 14 cm, capacity 11 L, product name: Polytube 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 Ltd.) were placed therein, followed by hand-rubbing five times from each direction. The feel of the clothing during the hand-rubbing was used to perform a sensory evaluation of the slipperiness of the clothing in hand-washing. Five panelists performed a sensory evaluation to determine whether the clothing felt slippery, and the number of panelists who judged the clothing to be slippery is shown in Table 2. The more panelists who judge the clothing to be slippery, the more comfortable it is to wash by hand.

[0080]

Claims

1. A powder detergent composition comprising 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), wherein the 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, and 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. 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) [wherein, R １ａ is an aliphatic hydrocarbon group having from 10 to 18 carbon atoms, AO is an alkyleneoxy group having from 2 to 3 carbon atoms, n is the average number of moles of AO added and is a number of from 1 to 20, and M is a cation.] Component (B): one or more alkali agents selected from inorganic carbonates and inorganic hydrogen carbonates.

2. The powder detergent composition according to claim 1, wherein the component (A) further comprises the following component (a2): Component (a2): an anionic surfactant having a sulfonic acid group or a salt thereof.

3. A powder detergent composition as described in claim 2, in which 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.

4. A powder detergent composition as described in 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.

5. A powder cleaning agent composition described in any one of claims 1 to 4, containing 5% by mass or more and 12% by mass or less of component (A).

6. 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.

7. A powder detergent composition according to any one of claims 1 to 6, wherein component (B) is one or more selected from sodium carbonate and potassium carbonate.

8. A 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.

9. The powder detergent composition according to any one of claims 1 to 8, which has 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.

10. A powder detergent composition comprising 5% by mass or more and 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), wherein the mass ratio (a1) / (A) of the content of the following component (a1) to the content of the component (A) is 0.16 to 0.70, and the mass ratio (a1) / (B) of the content of the component (a1) to the content of the component (B) is 0.2 to 2.0, and 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. Component (A): An anionic surfactant comprising 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) [wherein, R １ａ is an aliphatic hydrocarbon group having from 10 to 18 carbon atoms, AO is an alkyleneoxy group having from 2 to 3 carbon atoms, n is the average number of moles of AO added and is a number of from 1 to 20, and M is a cation.] Component (a2): an anionic surfactant having a sulfonic acid group or a salt thereof Component (B): one or more alkali agents selected from sodium carbonate and potassium carbonate 11. A powder detergent composition comprising: 5% by mass or more and 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), wherein the mass ratio (a1) / (A) of the content of the following component (a1) to the content of the component (A) is 0.16 to 0.70, and the mass ratio (a1) / (B) of the content of the component (a1) to the content of the component (B) is 0.2 to 2.0, 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, and 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. Component (A): An anionic surfactant comprising the following component (a1) and the following component (a2): Component (a1): A compound represented by the following general formula (a1): R １ａ -O-(AO) ｎ -SO ３ M (a1) [wherein, R １ａ is an aliphatic hydrocarbon group having from 10 to 18 carbon atoms, AO is an alkyleneoxy group having from 2 to 3 carbon atoms, n is the average number of moles of AO added and is a number of from 1 to 20, and M is a cation.] Component (a2): an anionic surfactant having a sulfonic acid group or a salt thereof Component (B): one or more alkali agents selected from sodium carbonate and potassium carbonate 12. A powder detergent 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, wherein the 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, and 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. Component (A): An anionic surfactant comprising 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) [wherein, R １ａ is an aliphatic hydrocarbon group having from 10 to 18 carbon atoms, AO is an alkyleneoxy group having from 2 to 3 carbon atoms, n is the average number of moles of AO added and is a number of from 1 to 20, and M is a cation.] Component (a2): alkylbenzenesulfonic acid or a salt thereof Component (B): one or more alkali agents selected from sodium carbonate and potassium carbonate 13. A powder detergent 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, wherein 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 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 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 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, and 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. Component (A): An 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) [wherein, R １ａ is an aliphatic hydrocarbon group having from 10 to 18 carbon atoms, AO is an alkyleneoxy group having from 2 to 3 carbon atoms, n is the average number of moles of AO added and is a number of from 1 to 20, and M is a cation.] Component (a2): alkylbenzenesulfonic acid or a salt thereof Component (B): one or more alkali agents selected from sodium carbonate and potassium carbonate 14. 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, wherein the 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, and 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, comprising component (B) containing sodium carbonate, and a content of sodium carbonate in the powder detergent composition of 3% by mass to 9% by mass. Component (A): An 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) [wherein, R １ａ is an aliphatic hydrocarbon group having from 10 to 18 carbon atoms, AO is an alkyleneoxy group having from 2 to 3 carbon atoms, n is the average number of moles of AO added and is a number of from 1 to 20, and M is a cation.] Component (a2): alkylbenzenesulfonic acid or a salt thereof Component (B): one or more alkali agents selected from sodium carbonate and potassium carbonate 15. 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, wherein the 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, and 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, comprising: component (B) containing sodium carbonate, a content of sodium carbonate in the powder detergent composition of 3% by mass or more and 9% by mass or less, and a bulk density measured by a method specified in JIS K 3362:2008 of 400 g / L or more and 900 g / L or less. Component (A): An 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) [wherein, R １ａ is an aliphatic hydrocarbon group having from 10 to 18 carbon atoms, AO is an alkyleneoxy group having from 2 to 3 carbon atoms, n is the average number of moles of AO added and is a number of from 1 to 20, and M is a cation.] Component (a2): alkylbenzenesulfonic acid or a salt thereof Component (B): one or more alkali agents selected from sodium carbonate and potassium carbonate 16. The powder detergent composition according to any one of claims 1 to 15, which is for hard surfaces and / or textile products.

17. A powder detergent composition according to any one of claims 1 to 15, for use on hard surfaces.

18. The powder detergent composition according to any one of claims 1 to 15, which is for use in a bathroom or toilet.

19. The powder detergent composition according to any one of claims 1 to 15, which is for use in textile products.

20. A powder detergent composition according to any one of claims 1 to 15, for use on hard surfaces and for use on textile products.

21. A method for cleaning hard surfaces and / or textile products, comprising cleaning the hard surfaces and / or textile products with a cleaning liquid comprising a mixture of the powder detergent composition according to any one of claims 1 to 15 and water.

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