Powder detergent composition

Abstract

To provide a powder detergent composition which achieves cleanability, particularly cleanability and rinsability of heat-modified oil stains or sebum stains, further has a favorable cleaning sensation and reduced sliminess.SOLUTION: This powder detergent composition contains 12 mass% or less of component (A) described below, and 3-10 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). Component (a1): a specific sulfuric acid ester, or a salt thereof, having an aliphatic hydrocarbon group and a polyalkyleneoxy group.SELECTED DRAWING: None

Description

[Technical field]

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

[0002] Since residential cleaners are used in various places and situations in the living environment, 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 stains. For example, strong alkaline cleaning properties are required for denatured oil stains around the kitchen, while for floors with stains that have a low dirt load, a cleaner with a lower surfactant concentration that 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 general dirt attached to 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 hand-rub or brush wash, that is, a clean feeling.In addition to the foam-eliminating ability (= rinsing ability) during rinsing, it is also required that there is no unpleasant feeling such as sliminess, just like with hard surfaces.

[0003] Patent Document 1 describes (a) a compound having the following structural formula (I): 1 -O-(EO) m -SO3- M + [In the formula, R 1 is a C8-18 linear or branched alkyl or alkenyl group, m is an average of 0.5-4 (however, m=0 is 50% or less by weight), EO is an ethylene oxide group, M +represents a sodium ion or a potassium ion.)], (b) 1 to 9 weight % of a polyoxyalkylene type nonionic surfactant having an HLB of 9 to 16, (c) 5 to 50 weight % of a zeolite, and (d) 5 to 50 weight % of an alkali metal carbonate, the weight ratio of the component (a) to the component (b) being (a) / (b)=5.7 / 4.3 to 9.67 / 0.33, which shows 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.

[0004] Patent Document 2 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, 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 that has excellent solubility in water, high detergency against oily stains derived from food, and comfortable hand-washing properties. The mass ratio of the content of component (b1) to the total content of components (b1) and (b2), that is, component (b1) / [component (b1)+component (b2)], is 0.4 or more and 1 or less. Component (a): Anionic surfactant Component (b): one or more compounds selected from the following components (b1) and (b2): (b1) Component: One or more compounds selected from potassium sulfate and potassium chloride (b2) Component: one or more compounds selected from sodium sulfate and sodium chloride (c) Component: one or more alkaline agents selected from alkali metal carbonates, alkali metal hydrogen carbonates, alkali metal silicates, and tripolyphosphates

[0005] Patent Document 3 discloses (a)(i) a free-flowing particulate laundry detergent composition comprising 0.5 wt% to 20 wt% of AES particles containing 40 wt% to 60 wt% of a partially ethoxylated alkyl sulfate-based anionic cleaning surfactant, which improves the cleaning performance and the fragrance performance of a laundry detergent powder product. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] JP 2005-213489 A [Patent Document 2] JP 2017-14497 A [Patent Document 3] US Patent Application Publication No. 2016 / 0289598 Summary of the Invention [Problem to be solved by the invention]

[0007] 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 a lack of stickiness. However, while a powder detergent composition is advantageous for achieving high detergency and a lack of stickiness, a powder detergent composition containing a large amount of anionic surfactant or alkaline agent is problematic in that it is in a trade-off relationship with a deterioration in both rinsability and stickiness.

[0008] 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. [Means for solving the problem]

[0009] 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), 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 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): An anionic surfactant containing the following component (a1): Component (a1): a compound represented by the following general formula (a1): R 1a -O-(AO) n -SO3M (a1) [In the formula, 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. (B) Component: One or more alkaline agents selected from inorganic carbonates and inorganic bicarbonates Effect of the Invention

[0010] According to the present invention, there is provided 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 which has a good cleaning feel and reduced sticky feeling. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] The reason why the powder detergent composition of the present invention has both good cleaning properties, particularly for cleaning heat-denatured oily soils or sebum soils, and good rinsing properties, and also has a good cleaning feel and suppressed sticky feeling is not entirely clear, but is presumed to be as follows. To achieve both good cleaning properties and rinsing properties, it is essential to blend a certain amount of component (a1), which has excellent cleaning properties but has a problem with rinsing properties, and component (A) containing it. 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 present invention, by controlling the optimal mass ratio (a1) / (A) and mass ratio (a1) / (B), it is possible to provide a powder detergent composition that satisfies all four elements. The mechanism by which the (a1) component exerts a cleansing sensation is that the (A) component binds with the hardness components in tap water to form scum, which reduces the inherent slipperiness of the (A) component, but by including the (a1) component in the (A) component, the scumming of the (A) component is suppressed, and the slipperiness is exerted, resulting in a good cleansing sensation. The mechanism by which the (B) component causes a sticky sensation is 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 sensation on the skin, so the content of the (B) component must be limited.

[0012] [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 -SO3M (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.

[0013] In the component (a1), in the general formula (a1), R 1ais 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 performance, particularly cleaning performance for thermally denatured oily soils or sebum soils, and 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 performance, particularly cleaning performance for thermally 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 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.).

[0014] 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

[0015] 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 alkyl or alkenyl group of these anionic surfactants has, for example, 8 or more and 22 or less carbon atoms. 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.).

[0016] 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.

[0017] 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 that fall under component (a1))

[0018] 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 or more and 18 or less 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.).

[0019] <(B) component> The powder detergent composition of the present invention contains, as component (B), one or more alkaline agents selected from inorganic carbonates and inorganic hydrogen carbonates.

[0020] 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.

[0021] Specific examples of inorganic hydrogen carbonates include one or more inorganic hydrogen carbonates selected from hydrogen carbonates of monovalent or divalent metals and ammonium hydrogen carbonate. Examples of hydrogen carbonates of monovalent metals include alkali metal hydrogen carbonates, more specifically, one or more compounds selected from sodium hydrogen carbonate, potassium hydrogen carbonate, and lithium hydrogen carbonate. Examples of hydrogen carbonates of divalent metals include alkaline earth metal hydrogen carbonates, more specifically, magnesium hydrogen carbonate.

[0022] From the viewpoint of cleaning properties, particularly cleaning properties for thermally denatured oily stains or sebum stains, and preparation into 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.

[0023] <Composition, etc.> The powder detergent composition of the present invention contains component (A) in an amount of preferably 4% by mass or more, more preferably 5% by mass or more, more preferably 6% by mass or more, even more preferably 8% by mass or more, and 12% by mass or less, preferably 11% by mass or less, and more preferably 10% by mass or less, from the viewpoint of cleaning properties, particularly cleaning properties for thermally denatured oily soils or sebum soils, and rinsability. 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% 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 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.

[0024] 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, from the viewpoints of cleaning ability, in particular cleaning ability for thermally denatured oily stains or sebum stains, rinsing ability and cleaning feeling, 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.

[0025] 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 cleaning ability, in particular cleaning ability for thermally denatured oily stains or sebum stains, rinsing ability, cleaning feel, and powder formulation, preferably 0.3 or more, more preferably 0.35 or more, and preferably 0.84 or less, more preferably 0.8 or less, and even more preferably 0.75 or less.

[0026] From the viewpoint of cleaning ability, particularly cleaning ability for thermally denatured oily stains or sebum stains 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 even more preferably 6 mass % or less.

[0027] 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 cleaning ability, in particular cleaning ability for thermally denatured oily stains or sebum stains, 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 is 2.0 or less, preferably 1.5 or less, more preferably 1.2 or less, even more preferably 1.0 or less.

[0028] 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 ability, in particular cleaning ability for thermally denatured oily stains or sebum stains, cleaning feel, rinsing ability, and suppression of sticky feeling, preferably 0.5 or more, more preferably 0.6 or more, even more preferably 0.7 or more, and is preferably 2.5 or less, more preferably 2.0 or less, even more preferably 1.5 or less, still more preferably 1.1 or less, and still more preferably 0.9 or less.

[0029] 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, in particular cleaning ability and rinsability for thermally denatured oily stains or sebum stains, and of preparation as a powder, 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, even more preferably 0.90 or less.

[0030] From the viewpoint of cleaning properties, particularly for cleaning heat-denatured oily stains or sebum stains, and of being capable of being formulated as a powder, 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 having a weight-average molecular weight of 3,000 or more.

[0031] 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)). Examples of polyacrylic acid or a salt thereof include polyacrylic acid, sodium polyacrylate, potassium polyacrylate, etc., and preferably sodium polyacrylate and potassium polyacrylate. Examples of the copolymer of acrylic acid and maleic acid or its salt include a copolymer of acrylic acid and maleic acid, a sodium salt of a copolymer of acrylic acid and maleic acid, a potassium salt of a copolymer of acrylic acid and maleic acid, etc., and preferably a sodium salt of a copolymer of acrylic acid and maleic acid, or 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.

[0032] The 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, so long as it does not interfere with the manifestation of the effects of the present invention. Examples of the monomer other than acrylic acid and maleic acid that is copolymerizable with acrylic acid and / or maleic acid include vinyl monomers, acrylic monomers, styrene monomers, etc., and more specifically, examples of the monomer include methacrylic acid, methyl acrylate, ethyl acrylate, methyl methacrylate, styrene, etc. The molar ratio of the monomer other than acrylic acid and maleic acid that is copolymerizable with acrylic acid and / or maleic acid in the 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 a salt thereof, and the copolymer of acrylic acid and maleic acid or a salt thereof of the present invention may be a polymer or copolymer containing, among all the constituent monomers, monomers other than acrylic acid and maleic acid that are copolymerizable with acrylic acid and / or maleic acid in an amount in the range of 0 mol % or more and 5 mol % or less.

[0033] The weight average molecular weight of the (c1) component 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 component (c) can be measured by GPC (gel permeation chromatography) and the weight average molecular weight (Mw) can be calculated using a conversion standard substance. The GPC measurement conditions are as follows. 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: Refractive index detector Column temperature: 40℃ ·Flow rate: 1.0mL / min Conversion standard material: Polyacrylic acid (American Standard Corporation) Sample: Add ion-exchanged water to an aqueous polymer solution containing 0.8 g of solids to make the total volume 200 mL, and then take 10 μL of this solution and inject it into the column.

[0034] 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 stains or sebum stains, and preparation into a powder formulation, the component (C) is contained 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 composition. In the present invention, the mass of component (C) is expressed as a value converted into a sodium salt.

[0035] 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 includes sodium silicate and potassium silicate.

[0036] When the powder detergent composition of the present invention contains component (D), from the viewpoints of cleaning ability, particularly cleaning ability for thermally denatured oily stains or sebum stains, and preparation into a powder formulation, the powder detergent composition of the present invention contains component (D) in an amount of preferably 2 mass % or more, more preferably 4 mass % or more, even more preferably 6 mass % or more, still more preferably 8 mass % or more, and preferably 16 mass % or less, more preferably 14 mass % or less, even more preferably 12 mass % or less, and still more preferably 10 mass % or less.

[0037] 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 anhydride.

[0038] When the powder detergent composition of the present invention contains component (E), the component (E) is contained in an amount of preferably 30 mass% or more, more preferably 40 mass% or more, even more preferably 50 mass% or more, and preferably 90 mass% or less, more preferably 85 mass% or less, even more preferably 80 mass% or less.

[0039] 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 to 5 mg / kg 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 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, even more preferably 5% by mass or less.

[0040] The powder detergent composition of the present invention may contain, as other components, other components known in the fields of powder detergents for hard surfaces and powder detergents for textile products, such as zeolite, bentonite, tripolyphosphate, polyalkylene glycol, bleaching agents (perborate, bleach activators, etc.), anti-redeposition agents, reducing agents (sulfites, etc.), fluorescent brightening agents (e.g., Tinopal CBS (trade name, manufactured by Ciba Specialty Chemicals), Whitex SA (trade name, manufactured by Sumitomo Chemical Co., Ltd.), etc.), antifoaming agents (silicone, etc.), organic solvents, enzymes (cellulase, protease, peptinase, lipase, dextranase, amylase, etc.), fragrances, colorants, etc. (however, those corresponding to components (A) to (E) are excluded).

[0041] When 1 g of the powder detergent composition of the present invention is diluted with 1000 g of ion-exchanged water, the pH at 25°C is preferably 9.0 or higher, more preferably 9.5 or higher, still more preferably 9.9 or higher, and preferably 12.0 or lower, more preferably 11.0 or lower, still more preferably 10.6 or lower, from the viewpoints of detergency, particularly the detergency of thermally denatured oil stains or sebum stains, and the removal of sliminess. The pH is measured according to the pH measurement method described below. <pH Measurement Method> Connect a combined electrode for pH measurement (glass sliding sleeve type, manufactured by HORIBA) to a pH meter (pH / Ion Meter F-23, manufactured by HORIBA), and turn on the power. As the internal solution of the pH electrode, a saturated potassium chloride aqueous solution (3.33 mol / L) is used. Next, fill 100 mL beakers 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), respectively, and immerse them in a constant temperature bath at 25°C for 30 minutes. Immerse the pH measurement electrode in the temperature-adjusted standard solution for 3 minutes, and perform the calibration operation in the order of pH 6.86 → pH 9.18 → pH 4.01. Adjust the sample to be measured to 25°C, immerse the electrode of the above pH meter in the sample, and measure the pH after 1 minute.

[0042] 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.

[0043] From the viewpoint of 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, 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 size of the sieve openings after vibrating the powder detergent composition using a JIS Z 8801 standard sieve for 5 minutes.

[0044] 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 supporting method, or a combination of methods selected from these.

[0045] 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 thermally 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.

[0046] The hard surface to be cleaned with the powder detergent composition of the present invention is preferably used in a bathroom, kitchen, or toilet, more preferably used in a bathroom or 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. Furthermore, examples of the hard surface material that can be targeted by the powder detergent composition of the present invention include hard surfaces made of one or more materials selected from the group consisting of plastics, ceramics, metals, wood, glass, rubber, and carbon materials.

[0047] 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 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 silk, wild silk), feathers, and cellulosic fibers (rayon, polynosic, cupra, acetate, etc.). 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.

[0048] In the present invention, the textile product refers to 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.

[0049] [Method of cleaning hard surfaces and / or textile products] 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.

[0050] In the method for cleaning hard surfaces and / or textile products of the present invention, the amount of water 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, in particular cleaning performance and rinsing performance of thermally denatured oily stains or sebum stains.

[0051] 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.

[0052] 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 cleaning ability, particularly of cleaning thermally denatured oil stains or sebum stains, 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 in the cleaning article above.

[0053] 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 liquid 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.

[0054] 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 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.

[0055] 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 of the textile product (kg) 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 amount of water (liters) of the cleaning solution of the present invention / mass of textile product (kg), is, from the viewpoints of cleaning performance and economy, 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.

[0056] 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.

[0057] 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. 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 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.

[0058] 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 to an area of ​​100 cm of the hard surface to be cleaned. 2 From the viewpoint of cleaning ability, particularly cleaning ability and rinsability for thermally denatured oil stains or sebum stains, the amount of the composition 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.

[0059] 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 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. EXAMPLES

[0060] [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, Neopelex G-15, manufactured by Kao Corporation, component (a2) AS: Sodium lauryl sulfate, Emal 10G, manufactured by Kao Corporation, component (a3) <(B) component> Sodium carbonate: Light ash, manufactured by Central Glass Co., Ltd. <(C) component> Oligomer D: Sodium polyacrylate, manufactured by Kao Corporation, weight average molecular weight 10,000 <(D) component> Crystalline silicate: Sodium silicate, Fuji Chemical Co., Ltd. "No. 2 silicate", purity 40%, the figures in the table are the purity values <(E) component> ·Sodium sulfate: Anhydrous Glauber's Salt, manufactured by Shikoku Kasei Kogyo Co., Ltd. <Other ingredients> Bentonite: Kunipia F, manufactured by Kunimine Industries Co., Ltd. Fluorescent dye: Chinopal CBS, manufactured by Chiba Specialty Chemicals Polyethylene glycol: Weight average molecular weight 13000, made by SINO-Japan

[0061] [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 uniform, and the other components were added and further thoroughly stirred to obtain each powder detergent composition with 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 ingredient. The bulk density of each prepared powder detergent composition was 500 to 800 g / L as measured by the method specified in JIS K 3362:2008, and the average particle size was 300 μm as calculated from the mass fraction based on the size of the sieve after vibrating 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 1000 g, the pH at 25° C. was 9.5 to 11.0.

[0062] [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 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 ⊚: No bubbles remain on the substrate. ◯: Almost no bubbles remain on the substrate. △: Some bubbles remain on the substrate.

[0063] <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 rinsing evaluation was used), and the substrate was scrubbed in one direction with a brush (the same brush as used in the 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. The more panelists who judged the substrate to be non-sticky and slippery, the higher the comfort of hand washing.

[0064] <Cleaning performance evaluation> 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 Image J, 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)

[0065] <(Easy) Cleaning Feel Evaluation (Evaluation of how smooth the brush is 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 more comfortable the brush cleaning is.

[0066] [Table 1]

[0067] [Example 2 and Comparative Example 2: Evaluation of textile product applications] <Rinsing (foam removal) evaluation> 1. Preparation of artificial sebum-stained cloth ·Artificial dirt The artificial soil was prepared by preparing a composition containing the following A, B, C, D, and E. The mass% of each is the proportion of the artificial soil in the final composition, 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% of the artificial soil is 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: 1.98% by mass of egg white lecithin liquid crystals (11.37 g of arginine hydrochloride, 4.20 g of histidine, and 2.44 g of serine were dissolved in 80 mL of distilled water, and the pH was adjusted to 5.0 with concentrated hydrochloric acid. The solution was then thoroughly mixed with egg white lecithin in a mixer to obtain an egg white lecithin liquid crystals). D: Kanuma red soil 8.11% by mass E: Carbon black 0.025% by mass Artificial sebum stained fabric 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).

[0068] 2. Preparation of mud-stained cloth The mud-stained cloth used for the evaluation was made using the following procedure. This method adheres particles between the fibers by re-contamination, making the cloth more difficult to remove than a cloth with mud applied to the surface. The mud used was Kanuma horticultural Akadama soil, which was dried for 4 hours at 120°C ± 5°C, crushed, and sieved through a 75μm sieve. 6g of mud was added to 1,000mL of ion-exchanged water, stirred, and then ultrasonically applied for 15 minutes. These were transferred to a tergotometer, and 15g of cotton knitted cloth (purchased from Tanigashira Shoten, 6cm x 6cm) 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 make a mud-stained cloth.

[0069] 3. Rinseability (foam removal) evaluation 3 L of model water at 30°C was poured into 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 evaluation clothing (100% cotton T-shirt, product name: YG crew neck T-shirt, product number: YV0013N, manufactured by Gunze Co., Ltd.) were poured into 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 rubbed for 15 seconds and the mud-stained cloth was rubbed for 30 seconds for each evaluation garment (one round trip (approximately 1 second) while rubbing the fabrics together was counted as one wash).The evaluation garments were then removed and wrung out 10 cm above the washbasin so that the moisture content of the evaluation garments was approximately 100 to 140% by mass. In another model circular washbasin, 3L of the above 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 up to a height of about 5 cm above the washbasin from the water bath 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 100-140% 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 ability was evaluated according to the following evaluation criteria. The results are shown in Table 2. Evaluation criteria ◎: No bubbles remain on the surface of the water in the bucket. ○: Almost no bubbles on the surface of the water in the bucket. △: Some foam remains on the surface of the water in the bucket.

[0070] <Slippery feeling evaluation> After the above-mentioned rinsing property (foam removal) evaluation, 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 it to be slippery, the more comfortable it is for hand washing.

[0071] <Cleaning performance evaluation> 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 with a concentration of 0.4 mass% of the powder detergent composition. Four pieces of artificial sebum-stained cloth (the same one 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. A cleaning rate of 70% or more is preferable.

[0072] <(Ease) Cleaning Feel 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 placed in 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 placed in the bucket, and hand-kneaded five times from each of two directions. The feel of the clothing during the hand-kneading was used to perform a sensory evaluation of the slipperiness of the clothing during hand-washing. 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. The more panelists who judged the clothing to be slippery, the higher the comfort of hand-washing.

[0073]

Table 2

Claims

1. 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, 1. 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): 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 (aq) [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. 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

3. 3. The powder detergent composition according to claim 1, comprising 5% by mass or more and 12% by mass or less of the component (A).

4. 4. The powder detergent composition according to claim 1, wherein the component (B) is at least one selected from the group consisting of sodium carbonate and potassium carbonate.

5. The powder detergent composition according to any one of claims 1 to 4, which has 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.

6. The powder detergent composition according to any one of claims 1 to 5, which is for hard surfaces and / or textile products.

7. The powder detergent composition according to any one of claims 1 to 5, which is for use on hard surfaces.

8. The powder detergent composition according to any one of claims 1 to 5, which is for use in a bathroom or a toilet.

9. The powder detergent composition according to any one of claims 1 to 5, which is for use in textile products.

10. The powder detergent composition according to any one of claims 1 to 5, which is for hard surfaces and for textile products.

Images