Detergent particles

Abstract

This provides detergent particles with reduced undissolved residue. [Solution] Detergent particles containing the following components A, B, C, and D, and satisfying requirement 1 below. Ingredient A: Alkali metal carbonate Ingredient B: Nonionic surfactant Component C: Alkylbenzenesulfonic acid or its alkali metal salt Component D: Fatty acid or its alkali metal salt Requirement 1: The total heat generated after 300 seconds from the addition of 10g of detergent particles to 40mL of 5°C water must be 200kJ / kg or less.

Description

[Technical Field]

[0001] This invention relates to detergent particles, a method for producing the same, a detergent composition, and a detergent article. [Background technology]

[0002] In recent years, with consumers increasingly favoring convenience, there has been a demand for detergent compositions that are easier to use. From the perspective of improving the usability of detergent compositions, for example, detergent articles in which the detergent composition is packaged in a water-soluble film have been disclosed.

[0003] Patent Document 1 discloses a detergent article comprising a detergent composition containing (a) a nonionic surfactant, (b) an anionic surfactant, (c) a cationic surfactant, and (d) an alkaline agent, wherein the content of component (d) exceeds 5% by mass, and a water-soluble film for packaging the detergent composition. Patent Document 2 discloses a detergent article comprising a detergent composition containing (a) a nonionic surfactant, (b) an anionic surfactant, (c) an oil-absorbing carrier, and (d) an alkaline agent, wherein component (d) has a coating layer of component (b), and the thickness of the coating layer of component (b) is 0.1 μm or more and 50 μm or less, and a water-soluble film for packaging the detergent composition. Patent Document 3 discloses detergent particles obtained by a method comprising the steps of: (1) manufacturing base detergent particles (a); (2) neutralizing the surface of the base detergent particles (a) obtained in step (1) with an acid precursor (f) of an anionic surfactant; and (3) coating the detergent particles obtained in step (2) with a surface modifier (c) containing layered clay minerals (b) with an average particle size of 40 μm or less. [Prior art documents] [Patent Documents]

[0004] [Patent Document 1] Japanese Patent Publication No. 2024-111829 [Patent Document 2] Japanese Patent Publication No. 2024-111395 [Patent Document 3] Japanese Patent Application Laid-Open No. 2009-108165

Summary of the Invention

Problems to be Solved by the Invention

[0005] Although solid detergent compositions are preferable from the viewpoint of efficient washing, undissolved residues may occur, which may impair the finish. Therefore, it is required to further reduce undissolved residues in solid detergent compositions. The present invention provides detergent particles, a method for producing the same, a detergent composition, and a detergent article in which undissolved residues are more suppressed.

Means for Solving the Problems

[0006] In one embodiment, the present invention provides detergent particles containing the following components A, B, C, and D and satisfying the following requirement 1. Component A: Alkali metal carbonate Component B: Nonionic surfactant Component C: Alkylbenzene sulfonic acid or its alkali metal salt Component D: Fatty acid or its alkali metal salt Requirement 1: The total heat generation amount until 300 seconds after putting 10 g of the detergent particles into 40 mL of water at 5°C is 200 kJ / kg or less.

[0007] In another embodiment, the present invention provides a method for producing detergent particles having the following steps 1, 2, and 3. Step 1: A step of mixing particles A containing an alkali metal carbonate (Component A), a nonionic surfactant (Component B), and water (Component E) to obtain particles B, wherein the mass ratio B / E of the mixing amount of Component B to the mixing amount of Component E is more than 0 and 28 or less. Step 2: A step of mixing the particles B obtained in Step 1 or particles derived from the particles B and an alkylbenzene sulfonic acid (Component C0) to obtain particles C, wherein the mass ratio C0 / B of the mixing amount of Component C0 to the mixing amount of Component B is 0.15 or more. Step 3: A step of mixing the particles C obtained in Step 2 or particles derived from particles C with fatty acids (component D0) to obtain particles D.

[0008] Furthermore, in another embodiment, the present invention provides a detergent composition containing the detergent particles.

[0009] Furthermore, in another embodiment, the present invention provides a detergent article having the detergent particles and a water-soluble film for packaging the detergent particles. [Effects of the Invention]

[0010] According to the present invention, detergent particles, a method for producing the same, a detergent composition, and a detergent article are provided in which undissolved residue is further suppressed. [Modes for carrying out the invention]

[0011] The mechanism by which the detergent particles, detergent composition, and detergent article of the present invention suppress undissolved detergent particles is not clear, but it is presumed to be as follows. The inventors discovered that fatty acids or their alkali metal salts (component D) used to coat detergent particles penetrate into the interior of the detergent particles, causing the fatty acids or their alkali metal salts (component D) to be unevenly distributed among the detergent particles, thereby affecting the solubility of the detergent particles. In the detergent particles, detergent composition, and detergent article of the present invention, it is presumed that the penetration of component D, which is a coating agent, into the detergent particles is suppressed, thereby improving the coating properties of component D on the entire surface of the detergent particles and suppressing undissolved detergent particles. Specifically, it is presumed that when the nonionic surfactant, water, and alkylbenzene sulfonic acid come into contact with the particles containing the alkaline agent, they thicken and remain on the particle surface, forming detergent particles. This inhibits the penetration of component D into the interior of the detergent particles, and as a result, the coating efficiency of component D on the entire surface of the detergent particles is improved. Furthermore, the detergent particles, their manufacturing method, detergent composition, and detergent article of the present invention are not limited to the above-described mechanism of action.

[0012] [Detergent particles] In an exemplary embodiment, the present invention provides detergent particles containing the following components A, B, C, and D, and satisfying requirement 1 below. Ingredient A: Alkali metal carbonate Ingredient B: Nonionic surfactant Component C: Alkylbenzenesulfonic acid or its alkali metal salt Component D: Fatty acid or its alkali metal salt Requirement 1: The total heat generated after 300 seconds from the time 10g of detergent particles is placed in 40mL of 5°C water must be 200kJ / kg or less.

[0013] <Ingredient A> Component A is an alkali metal carbonate. Component A may be one or more alkali metal carbonates selected from a range of alkali metal carbonates. Examples of alkali metal carbonates include one or more selected from sodium carbonate and potassium carbonate, with sodium carbonate being preferred.

[0014] <Component B> Component B is a nonionic surfactant. Component B may be one or more nonionic surfactants selected from the available types. Component B can be one or more selected from, for example, polyoxyalkylene alkyl or alkenyl ethers, alkyl (poly)glycosides (glycoside-type nonionic surfactants), sorbitan-based nonionic surfactants, compounds in which alkylene oxide is added between the ester bonds of long-chain fatty acid alkyl esters, fatty acid monoglycerides, and sucrose fatty acid esters, from the viewpoint of improving cleaning performance.

[0015] Component B is preferably a nonionic surfactant (hereinafter referred to as component B1) having, for example, an alkylene oxy group, with an average number of alkylene oxy groups of 1 or more and 30 or less. The alkylene oxy group of component B1 is preferably one or more groups selected from alkylene oxy groups having 2 to 4 carbon atoms. The alkylene oxy group having 2 to 4 carbon atoms is preferably one or more groups selected from ethylene oxy groups and propylene oxy groups. The average number of moles of the alkyleneoxy group of Component B1 is 1 or more, preferably 6 or more, more preferably 10 or more, and 30 or less, preferably 25 or less, more preferably 20 or less, and still more preferably 15 or less, from the viewpoint of improving detergency.

[0016] Component B1 is preferably at least one selected from nonionic surfactants represented by the following general formula (B1). R 1b (CO) m O-(A 1b O) n -R 2b (B1) [In the formula, R 1b is an aliphatic hydrocarbon group having 8 to 18 carbon atoms, and R 2b is a hydrogen atom or a methyl group. CO is a carbonyl group, m is the number of moles of CO, and is 0 or 1. A 1b is an alkylene group having 2 to 4 carbon atoms. n is the average number of moles of the alkyleneoxy group A 1b O, and is a number from 1 to 30. ]

[0017] In the general formula (B1), the number of carbon atoms of R 1b is 8 or more, preferably 10 or more, more preferably 12 or more, and 18 or less, preferably 16 or less, more preferably 14 or less, from the viewpoint of improving detergency. R 1b is an aliphatic hydrocarbon group, preferably a group selected from an alkyl group and an alkenyl group. R 1b is more preferably an alkyl group having the number of carbon atoms within the above range.

[0018] In the general formula (B1), A 1b O is at least one selected from alkyleneoxy groups having 2 to 4 carbon atoms, preferably at least one selected from alkyleneoxy groups having 2 to 3 carbon atoms, and more preferably an ethyleneoxy group. A 1b When O contains a plurality of different alkyleneoxy groups, the different alkyleneoxy groups may be in a block type bond or a random type bond.

[0019] In general formula (B1), n ​​is an alkylene oxy group A 1b The average number of moles of O, the embodiment and preferred embodiment are the same as the embodiment and preferred embodiment of the alkylene oxy group of component B1, respectively. In the general formula (B1), m is preferably 0 from the viewpoint of improving cleaning performance. In general formula (B1), R 2b From the viewpoint of improving cleaning performance, hydrogen atoms are preferred.

[0020] Nonionic surfactants other than component B1 include, for example, one or more selected from sucrose fatty acid esters, glycerin fatty acid esters, sorbitan fatty acid esters, alkyl glycosides, and glyceryl monoethers.

[0021] <Component C> Component C is alkylbenzenesulfonic acid or its alkali metal salt. Component C may be one or more selected from alkylbenzenesulfonic acid and its alkali metal salts.

[0022] Component C is preferably one or more compounds selected from those represented by the following general formula (C1) from the viewpoint of ease of controlling solubility. R 1c -B-SO3M (C1) [In formula (C1), R 1c R represents an alkyl group having 9 to 14 carbon atoms, B represents a benzene ring, and R is bonded to the carbon atom of B. 1c The carbon atom is a secondary carbon atom, and M indicates a cation. R is bonded to B. 1c In contrast, the sulfonic acid group is bonded to the ortho, meta, or para position.

[0023] In general formula (C1), R 1c The alkyl group has 9 or more carbon atoms, preferably 10 or more, and 14 or fewer carbon atoms, preferably 13 or fewer. In the general formula (C1), M is preferably one or more selected from hydrogen ions, sodium ions, and potassium ions, more preferably one or more selected from sodium ions and potassium ions, and even more preferably sodium ions.

[0024] Component C is preferably a p-alkylbenzenesulfonic acid or a salt thereof, with an alkyl group having 11 to 14 carbon atoms, and more preferably a p-alkylbenzenesulfonic acid or a sodium salt thereof. That is, in general formula (C1), component C is R 1c A is an alkyl group with 11 to 14 carbon atoms, M is a sodium ion, and R is bonded to B. 1c In contrast, compounds in which the sulfonic acid group is bonded at the para position are preferred.

[0025] <Component D> Component D is a fatty acid or an alkali metal salt thereof. Component D may be one or more selected from fatty acids and their alkali metal salts.

[0026] From the viewpoint of controlling solubility, component D is preferably one or more compounds selected from those represented by the following general formula (D1). R 1d -COOM (D1) [In formula (D1), R 1d [where M represents an alkyl or alkenyl group with 7 to 17 carbon atoms, and M represents a cation.]

[0027] In general formula (D1), R 1d This is an alkyl or alkenyl group having 7 or more carbon atoms, preferably 9 or more, more preferably 11 or more, and 17 or fewer carbon atoms, preferably 15 or fewer, more preferably 13 or fewer. R 1d The group can be one or more groups selected from a linear alkyl group, a branched alkyl group, a linear alkenyl group, and a branched alkenyl group, with a linear alkyl group being preferred. In general formula (D1), M is preferably one or more selected from hydrogen ions, sodium ions, and potassium ions, more preferably one or more selected from sodium ions and potassium ions, and even more preferably a sodium ion.

[0028] Component D is preferably one or more selected from lauric acid, myristic acid, palmitic acid, isopalmitic acid, stearic acid, isostearic acid, and salts thereof; more preferably one or more selected from lauric acid, myristic acid, palmitic acid, and salts thereof; even more preferably one or more selected from lauric acid, myristic acid, and salts thereof; and even more preferably lauric acid and / or a salt thereof. Component D is R in general formula (D1). 1d A compound in which is an alkyl group having 11 to 17 carbon atoms is preferred, 1d A compound in which is an alkyl group having 11 to 17 carbon atoms, and M is a hydrogen ion and / or a sodium ion, is more preferable.

[0029] <Composition, etc.> The detergent particles of the present invention contain component A in an amount of preferably 2% by mass or more, more preferably 5% by mass or more, and even more preferably 10% by mass or more, from the viewpoint of improving cleaning power, and preferably 30% by mass or less, more preferably 25% by mass or less, from the viewpoint of reducing the level of undissolved residue (hereinafter also referred to as improving solubility). The regulations regarding the content of component A may be interpreted as the amount of component A included. The content of component A shall be expressed as the value converted to a sodium salt, and a portion of it may be neutralized by component C or component D in acid form. In this specification, the amounts of component A, component B, component C, component D, and other optional components can be calculated by determining the mass ratio of each component to the total amount, thereby determining the content (mass %) in the detergent particles.

[0030] The detergent particles of the present invention contain component B in an amount of preferably 5% by mass or more, more preferably 6% by mass or more, and even more preferably 7% by mass or more, from the viewpoint of improving cleaning power, and preferably 20% by mass or less, more preferably 15% by mass or less, even more preferably 12% by mass or less, and even more preferably 10% by mass or less, from the viewpoint of improving stability.

[0031] The detergent particles of the present invention contain component C in an amount of preferably 0.1% by mass or more, more preferably 0.5% by mass or more, even more preferably 1.0% by mass or more, and even more preferably 1.5% by mass or more, from the viewpoint of reducing the level of undissolved components, and from the viewpoint of improving antibacterial properties, preferably 5% by mass or less, more preferably 4.0% by mass or less, even more preferably 3.5% by mass or less, and even more preferably 3.0% by mass or less. The specification regarding the mass of component C shall use the value converted to acid equivalent. Furthermore, the level of undissolved material can be determined by the method described in the examples below.

[0032] The detergent particles of the present invention contain component D in an amount of preferably 0.1% by mass or more, more preferably 2.0% by mass or more, even more preferably 4.0% by mass or more, and preferably 10% by mass or less, more preferably 8.0% by mass or less, and even more preferably 6.0% by mass or less, from the viewpoint of reducing the level of undissolved components. Furthermore, the specification regarding the mass of component D shall use the value obtained by converting it to acid equivalent.

[0033] <Component E> The detergent particles of the present invention may optionally contain water (hereinafter referred to as component E). Component E may be one or more selected from, for example, deionized water, purified water, water produced in the manufacturing process of the detergent particles of the present invention, and water introduced by the blending of water-containing raw materials.

[0034] The detergent particles of the present invention contain component E in an amount of preferably 0.1% by mass or more, more preferably 0.5% by mass or more, and even more preferably 1.0% by mass or more, from the viewpoint of improving particle strength, and preferably 30% by mass or less, more preferably 20% by mass or less, and even more preferably 10% by mass or less, from the viewpoint of improving stability.

[0035] <Ingredient F> From the viewpoint of improving antibacterial activity, the detergent particles of the present invention may optionally contain surfactants other than components B, C, and D (hereinafter referred to as component F). Component F may be one or more selected from cationic surfactants, anionic surfactants other than components C and D, and amphoteric surfactants.

[0036] The cationic surfactant of component F may be one or more selected from alkyltrimethylammonium salts with 8 to 22 carbon atoms in the alkyl group, dialkyldimethylammonium salts with 8 to 22 carbon atoms in the alkyl group, alkyldimethylbenzylammonium salts with 8 to 22 carbon atoms in the alkyl group, or benzethonium salts. Examples of these salts include halogenated salts such as chloride salts and alkyl sulfates with 1 to 3 carbon atoms.

[0037] From the viewpoint of improving cleaning performance, the anionic surfactant of component F is preferably one or more selected from, for example, sulfate ester type surfactants, (hydroxy)alkanesulfonic acid type surfactants, olefin sulfonate type surfactants, alkyl sulfosuccinate type surfactants, and sulfo fatty acid ester type surfactants. Furthermore, when the anionic surfactant of component F is a salt, examples of the salt of component F include inorganic salts such as sodium salt, potassium salt, ammonium salt, and magnesium salt, and organic salts such as monoethanolamine salt, diethanolamine salt, triethanolamine salt, and morpholine salt. The salt of the anionic surfactant of component F is preferably an inorganic salt selected from alkali metal salts such as sodium salt and potassium salt, and alkaline earth metal salts such as magnesium salt, more preferably an alkali metal salt, and even more preferably a sodium salt.

[0038] Examples of amphoteric surfactants of component F include N-alkanoylaminopropyl-N,N-dimethylamine oxide, N-alkyl-N,N-dimethylamine oxide, N-alkanoylaminopropyl-N,N-dimethyl-N-carboxymethylammonium betaine, N-alkyl-N,N-dimethyl-N-carboxymethylammonium betaine, N-alkyl-N,N-dimethyl-N-sulfopropylammonium sulfobetaine, N-alkyl-N,N-dimethyl-N-(2-hydroxysulfopropyl)ammonium sulfobetaine, N-alkanoylaminopropyl-N,N-dimethyl-N-sulfopropylammonium sulfobetaine, and N-alkanoylaminopropyl-N,N-dimethyl-N-(2-hydroxysulfopropyl)ammonium sulfobetaine. In these, the alkanoyl group is, for example, a lauroyl group or a myristyl group. In these, the alkyl group is, for example, a lauryl group or a myristyl group.

[0039] When the detergent particles of the present invention contain component F, the detergent particles of the present invention contain component F in an amount of preferably 0.5% by mass or more, more preferably 1.0% by mass or more, and even more preferably 1.5% by mass or more, from the viewpoint of improving cleaning performance, and preferably 5.0% by mass or less, more preferably 3.0% by mass or less, and even more preferably 2.0% by mass or less, from the viewpoint of improving stability. When the detergent particles of the present invention contain a cationic surfactant of component F, the specification regarding the mass of the cationic surfactant shall be based on the value converted to a chloride salt. Furthermore, if the detergent particles of the present invention contain the anionic surfactant component F, the specification regarding the mass of the anionic surfactant shall be based on the value converted to a sodium salt.

[0040] <Ingredient G> The detergent particles of the present invention may optionally contain a modifier (hereinafter referred to as component G). When the detergent particles of the present invention contain component G, component G is preferably contained in the detergent particles at an amount of 5% by mass or more from the viewpoint of improving stability, and preferably 40% by mass or less from the viewpoint of flow characteristics. Component G is preferably a water-insoluble carrier. With respect to component G, "water-insoluble" means that 0.1 g or more of it does not dissolve in 100 g of water at 20°C.

[0041] Component G can be an amorphous aluminosilicate (oil absorption capacity: 285 mL / 100 g) as described in Japanese Patent Publication No. 9-132794, Japanese Patent Publication No. 7-10526, Japanese Patent Publication No. 6-227811, Japanese Patent Publication No. 8-119622, etc. Furthermore, component G may be one or more selected from calcium silicate, amorphous silica, and amorphous aluminosilicate. Specifically, examples of calcium silicate component G include Fluorite R (manufactured by Tokuyama Corporation, oil absorption capacity: 400-500 mL / 100 g), amorphous silica component G includes Toxil NR (manufactured by Tokuyama Corporation, oil absorption capacity: 210-270 mL / 100 g) and Silopure (manufactured by Fuji Silicia Chemical Co., Ltd., oil absorption capacity: 240-280 mL / 100 g), and amorphous aluminosilicate component G includes TIXOREX25 (manufactured by Hanfu Chemical Co., Ltd., 220-270 mL / 100 g).

[0042] Furthermore, component G may be one or more selected from crystalline aluminosilicates. Examples of crystalline aluminosilicates for component G include zeolites. Specific examples of zeolites include crystalline aluminosilicates such as type A, type X, and type P zeolites. A suitable crystalline aluminosilicate is type A zeolite (for example, trade name "Toyobuilder": manufactured by Tosoh Corporation, oil absorption capacity according to JIS K 5101: 40 mL / 100 g or more). Other suitable examples include type P (for example, trade names "Doucil A24", "ZSEO64", etc.; both manufactured by Crosfield; oil absorption capacity 60-150 mL / 100 g), type X (for example, trade name "WessalithXD"; manufactured by Degussa; oil absorption capacity 80-100 mL / 100 g), and hybrid zeolites described in International Publication No. 98 / 42622.

[0043] Furthermore, component G may be one or more selected from clay minerals. Examples of clay minerals for component G include bentonite. Bentonite with an ion exchange capacity of 50 to 100 meq / 100g is preferred. Bentonite can be one or more selected from montmorillonite group mineral clay (smectitic clay) selected from the group consisting of alkali metal or alkaline earth metal montmorillonite, saponite and hectorite, illite, attapulgite and kaolinite. Bentonite can be used in powdered or granulated form. For example, refer to the clay mineral granules in Japanese Patent Publication No. 2008-189719.

[0044] The average primary particle size of component G is preferably 0.1 μm or more, more preferably 1 μm or more, even more preferably 10 μm or more, and preferably 1,000 μm or less, and more preferably 500 μm or less. The average primary particle size of component G was measured using a rotap-type sieve shaker. Specifically, the average primary particle size of component G was determined by sieving using standard sieves specified in JIS Z 8801, measuring the mass of the sample remaining on each sieve, and calculating the mass fraction according to the sieve mesh size. Component G may be a water-soluble oil-absorbing carrier. From the viewpoint of retaining the surfactant, component G is preferably one with an oil absorption capacity of 120 mL / 100 g or more. There is no particular upper limit. The oil absorption capacity of component G can be measured according to JIS K 5101-13-2. Furthermore, regarding component G, "water-soluble" means that 0.1g or more dissolves in 100g of water at 20°C.

[0045] <Porous particles> From the viewpoint of manufacturing suitability, the detergent particles of the present invention may preferably contain porous particles. Porous particles are preferably spray-dried particles from the viewpoint of reducing undissolved levels, improving washability, and suitability for manufacturing. Furthermore, from the same viewpoint, porous particles containing component A are preferred, and spray-dried particles containing component A are more preferred. Porous particles can be produced by known granulation methods, and are not particularly limited, but are preferably obtained as spray-dried particles. Spray-dried particles can be produced, for example, by the method described in Production Example 1 of Japanese Patent Application Publication No. 2009-108165 (paragraph 0041). Porous particles containing component A can be obtained by incorporating component A during the process of manufacturing porous particles, or by mixing porous particles with component A after the manufacturing of porous particles. Furthermore, after incorporating component A during the process of manufacturing porous particles, the obtained porous particles can be further mixed with component A.

[0046] The porous particles contain component A in an amount of preferably 20% by mass or more, more preferably 30% by mass or more, even more preferably 40% by mass or more, and preferably 60% by mass or less, more preferably 55% by mass or less, and even more preferably 50% by mass or less, from the viewpoint of reducing the level of undissolved components.

[0047] The bulk density of the porous particles of the present invention varies depending on the manufacturing method, but is preferably 0.2 g / cm³. 3 More preferably 0.3 g / cm³ 3More preferably 0.35 g / cm³ 3 In addition, preferably 1 g / cm³ 3 More preferably, 0.95 g / cm³ 3 More preferably, 0.9 g / cm³ 3 The following applies:

[0048] The average particle diameter of the porous particles of the present invention is preferably 100 μm or more, more preferably 150 μm or more, even more preferably 200 μm or more, and preferably 800 μm or less, more preferably 750 μm or less, and even more preferably 700 μm or less. This average particle size is determined using a rotap-type sieve shaker. Specifically, the average particle size is determined by sieving using standard sieves specified in JIS Z 8801, measuring the mass of the sample remaining on each sieve, and calculating the mass fraction according to the sieve mesh size.

[0049] <Component H> From the viewpoint of improving cleaning performance, the detergent particles of the present invention preferably contain one or more enzymes selected from protease, lipase, and amylase (hereinafter referred to as component H). Examples of proteases include serine proteases (EC 3.4.21) and metalloproteases (EC 3.4.17 or EC 3.4.24). Suitable examples of proteases include neutral or alkaline serine proteases such as subtilisin (EC 3.4.21.62). Examples of lipases include triacylglycerol lipase (EC 3.1.1.3), phospholipase A2 (EC 3.1.1.4), lysophospholipase (EC 3.1.1.5), monoglyceride lipase (EC 3.1.1.23), galactolipase (EC 3.1.1.26), phospholipase A1 (EC 3.1.1.32), and lipoprotein lipase (EC 3.1.1.34). Examples of amylases include α-amylase (EC 3.2.1.1), β-amylase (EC 3.2.1.2), and / or glucoamylase (EC 3.2.1.3). Suitable amylases include neutral or alkaline α-amylases, preferably of microorganismal origin such as bacteria or fungi.

[0050] When the detergent particles of the present invention contain component H, the detergent particles of the present invention contain component H in an amount of 0.01% by mass or more, more preferably 0.1% by mass or more, even more preferably 0.3% by mass or more, and preferably 30% by mass or less, more preferably 20% by mass or less, and even more preferably 10% by mass or less, from the viewpoint of improving cleaning power.

[0051] <Ingredient K> The detergent particles of the present invention may optionally contain a polymer having a carboxyl group and / or a salt thereof (hereinafter referred to as component K) having a weight-average molecular weight of 3,000 or more. Component K may consist of one or more types. Component K may 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 K1). Examples of polyacrylic acid or its salts include polyacrylic acid, sodium polyacrylate, and potassium polyacrylate, with sodium polyacrylate and potassium polyacrylate being preferred. Examples of acrylic acid-maleic acid copolymers or their salts include acrylic acid-maleic acid copolymers, sodium salts of acrylic acid-maleic acid copolymers, and potassium salts of acrylic acid-maleic acid copolymers, preferably sodium salts of acrylic acid-maleic acid copolymers and potassium salts of acrylic acid-maleic acid copolymers. The molar ratio of acrylic acid-derived constituent units to maleic acid-derived constituent units of the acrylic acid-maleic acid copolymer is preferably 1 / 99 or more, more preferably 10 / 90 or more, and preferably 99 / 1 or less, and more preferably 90 / 10 or less, as expressed as the number of moles of acrylic acid-derived constituent units / the number of moles of maleic acid-derived constituent units.

[0052] Component K1 may be a copolymer containing monomers other than acrylic acid and maleic acid that are copolymerizable with acrylic acid and / or maleic acid, as long as this does not hinder the expression of the effects of the present invention. Examples of monomers other than acrylic acid and maleic acid that are copolymerizable with acrylic acid and / or maleic acid include vinyl monomers, acrylic monomers, and styrene monomers, and more specifically, methacrylic acid, methyl acrylate, ethyl acrylate, methyl methacrylate, and styrene. The molar ratio of constituent units derived from monomers other than acrylic acid and maleic acid that are copolymerizable with acrylic acid and / or maleic acid in component K1 is preferably 0 mol% or more, preferably 5 mol% or less, more preferably 3 mol% or less, and even more preferably 0 mol% in component K1. Accordingly, the polyacrylic acid or its salt, and the copolymer or salt thereof of acrylic acid and maleic acid of the present invention may be polymers or copolymers that contain, in the total number of constituent units, monomer-derived constituent units other than acrylic acid and maleic acid, which are copolymerizable with acrylic acid and / or maleic acid, in an amount of 0 mol% to 5 mol%.

[0053] The weight-average molecular weight of component K is preferably 3,000 or more, more preferably 3,500 or more, even more preferably 4,000 or more, even more preferably 5,000 or more, even more preferably 6,000 or more, even more preferably 7,000 or more, even more preferably 8,000 or more, even more preferably 9,000 or more, even more preferably 10,000 or more, and preferably 100,000 or less, more preferably 50,000 or less. This weight-average molecular weight can be measured according to the weight-average molecular weight measurement method described below.

[0054] <Method for measuring weight-average molecular weight> The weight-average molecular weight of component K can be measured by GPC (gel permeation chromatography), and the weight-average molecular weight (Mw) can be determined using a conversion standard substance. The GPC measurement conditions are shown below. • Column: Manufactured by Tosoh Corporation, Product name: TSK-GEL guard PWXL Manufactured by Tosoh Corporation, Product name: TSK-GEL G4000 PWXL Manufactured by Tosoh Corporation, Product name: TSK-GEL G2500 PWXL Mobile phase: 0.1 mol / L potassium dihydrogen phosphate and 0.1 mol / L sodium dihydrogen phosphate aqueous solutions / acetonitrile = 90 / 10 (volume ratio) • Detector: Differential refractive index detector Column temperature: 40°C ·Flow rate: 1.0mL / min • Conversion reference material: Polyacrylic acid [manufactured by American Standard Corporation] • Sample: An aqueous polymer solution containing 0.8 g of solids is mixed with deionized water to prepare a total volume of 200 mL. 10 μL of this prepared solution is then taken and injected into the column.

[0055] When the detergent particles of the present invention contain component K, the detergent particles of the present invention contain component K in an amount of preferably 0.1% by mass or more, more preferably 0.5% by mass or more, even more preferably 2% by mass or more, preferably 20% by mass or less, more preferably 15% by mass or less, and even more preferably 10% by mass or less, from the viewpoint of improving cleaning performance and stability.

[0056] <Ingredient L> The detergent particles of the present invention may optionally contain polyalkylene glycol (hereinafter referred to as component L) having a weight-average molecular weight of 100 or more and 100,000 or less. Component L may be one or more selected from polyethylene glycol and polypropylene glycol. The weight-average molecular weight of component L is 100 or more, preferably 1,000 or more, more preferably 4,000 or more, and 100,000 or less, preferably 10,000 or less, and more preferably 8,000 or less. Here, the weight-average molecular weight is the value obtained using gel permeation chromatography with polystyrene as the standard substance.

[0057] When the detergent particles of the present invention contain component L, the detergent particles of the present invention contain component L in an amount of 0.001% by mass or more, more preferably 0.01% by mass or more, even more preferably 0.1% by mass or more, and preferably 40% by mass or less, more preferably 30% by mass or less, and even more preferably 20% by mass or less, from the viewpoint of improving stability.

[0058] The detergent particles of the present invention may optionally contain, as other components, one or more selected from other components known in the field of laundry detergents, such as bleaching agents (perborate, bleach activators, etc.), anti-redeposition agents, reducing agents (sulfites, etc.), fluorescent whitening agents, anti-foaming agents (silicone, etc.), organic solvents, fragrances, colorants, and antibacterial agents (excluding those corresponding to components A to L).

[0059] The detergent particles of the present invention may be detergent particles comprising components A, B, C, D, and E. The detergent particles of the present invention may be detergent particles comprising one or more components selected from the arbitrary components listed above for the detergent particles of the present invention. In the detergent particles of the present invention, the preferred blending amounts of components A to E and any optional components can be applied by replacing the preferred content in the detergent particles of the present invention with the blending amounts. Furthermore, in the detergent particles of the present invention, the mass ratio of the amount of each component can be applied by replacing the mass ratio of the preferred content in the detergent particles of the present invention with the mass ratio of the amount of each component.

[0060] The detergent particles of the present invention can be manufactured by known methods. For example, they can be manufactured by spray drying, dry neutralization, dry granulation, dry blending, fluidized bed drying, thin film drying, extrusion granulation, rolling granulation, agitation granulation, compaction granulation, surfactant loading, or a selection and combination thereof. The detergent particles of the present invention may be a group of detergent particles.

[0061] The detergent particles of the present invention satisfy requirement 1 below, preferably requirement 1a, from the viewpoint of delaying dissolution in cold water. Requirement 1: The total heat generated after 300 seconds from the time 10g of detergent particles is placed in 40mL of 5°C water must be 200kJ / kg or less. Requirement 1 is preferably the following Requirement 1a from the viewpoint of ease of measurement. Requirement 1a: 10 g of detergent particles, from which coarse particles have been removed by sieving with a mesh size of 2,000 μm, are brought to 5°C, and the total heat generated after 300 seconds in 40 mL of 5°C water is 200 kJ / kg or less.

[0062] The total calorific value of requirement 1 and requirement 1a is 200 kJ / kg or less, more preferably 190 kJ / kg or less, and even more preferably 180 kJ / kg or less, from the viewpoint of delaying dissolution in cold water, and from the viewpoint of improving the solubility of detergent particles, it is preferably 120 kJ / kg or more, more preferably 130 kJ / kg or more, and even more preferably 150 kJ / kg or more.

[0063] In requirements 1 and 1a, bringing the detergent particles to 5°C means leaving the detergent particles in a refrigerator at a temperature of 5°C for 30 minutes. Furthermore, the total heat generation for requirement 1 and requirement 1a can be calculated using the method described in the examples.

[0064] The bulk density of the detergent particles of the present invention varies depending on the manufacturing method, but is preferably 0.2 g / cm³. 3 More preferably 0.3 g / cm³ 3 More preferably 0.35 g / cm³ 3 In addition, preferably 1 g / cm³ 3 More preferably, 0.95 g / cm³ 3 More preferably, 0.9 g / cm³ 3 The following applies:

[0065] The average particle size of the detergent particles of the present invention is preferably 100 μm or more, more preferably 150 μm or more, even more preferably 200 μm or more, and preferably 800 μm or less, more preferably 750 μm or less, and even more preferably 700 μm or less. This average particle size is determined using a rotap-type sieve shaker. Specifically, the average particle size is determined by sieving using standard sieves specified in JIS Z 8801, measuring the mass of the sample remaining on each sieve, and calculating the mass fraction according to the sieve mesh size.

[0066] The detergent particles of the present invention may be detergent particles produced by the following method for producing detergent particles, but are not limited to detergent particles produced by this method.

[0067] <Method for manufacturing detergent particles> In an exemplary embodiment, the present invention provides a method for producing detergent particles comprising the following steps 1, 2, and 3. Step 1: A step of mixing particles A containing alkali metal carbonate (component A), a nonionic surfactant (component B), and water (component E) to obtain particles B, wherein the mass ratio B / E of the amount of component B mixed to the amount of component E mixed is greater than 0 and less than or equal to 28. Step 2: A step of mixing particle B obtained in Step 1 or particles derived from particle B with alkylbenzene sulfonic acid (hereinafter referred to as component C0) to obtain particle C, wherein the mass ratio C0 / B of the amount of component C0 mixed to the amount of component B mixed is 0.15 or more. Step 3: A step to obtain particle D by mixing particle C obtained in Step 2 or particles derived from particle C with fatty acid (hereinafter referred to as component D0).

[0068] In the method for producing detergent particles of the present invention, preferred embodiments of component A, component B, component C in acid form (component C0), component D in acid form (component D0), and component E are the same as preferred embodiments of components A to E of the detergent particles of the present invention. Furthermore, in the method for producing detergent particles of the present invention, one or more of the optional components listed for the detergent particles of the present invention can be arbitrarily mixed, as long as they do not interfere with the effects of the present invention. The preferred embodiments of these optional components are the same as the preferred embodiments of the optional components for the detergent particles of the present invention. Furthermore, in the method for producing detergent particles of the present invention, the mixing amounts and mixing ratios of components A to E and any optional components can be applied by substituting the content or content ratio in the detergent particles of the present invention with the mixing amounts or mixing ratios.

[0069] (Particle A) Particle A is a particle containing component A. Particle A may be a porous particle containing component A as listed in the detergent particles of the present invention. Furthermore, particle A may be produced by the known manufacturing method mentioned for the detergent particles of the present invention. Particle A may be, for example, spray-dried particles containing component A, particles obtained by further adding component A to spray-dried particles containing component A, or particles obtained by mixing component A with (porous) particles that do not contain component A. The preferred content of component A in particle A is the same as the preferred content of component A in the porous particles containing component A mentioned in the detergent particles of the present invention.

[0070] <Process 1> Step 1 is a step in which particles A containing component A, component B, and component E are mixed in a ratio B / E of greater than 0 and less than or equal to 28. Step 1 can yield particles B containing components A, B, and E. In step 1, for example, particle B can be obtained by spraying particle A with component B, component E, or component B and component E.

[0071] In step 1, the amount of component B mixed is preferably 5 parts by mass or more, more preferably 10 parts by mass or more, even more preferably 15 parts by mass or more, and preferably 100 parts by mass or less, more preferably 50 parts by mass or less, even more preferably 30 parts by mass or less, and even more preferably 15 parts by mass or less, from the viewpoint of reducing the level of undissolved particles A.

[0072] In step 1, the amount of component E mixed is preferably 1.0 part by mass or more, more preferably 2.0 parts by mass or more, even more preferably 3.0 parts by mass or more, and preferably 100 parts by mass or less, more preferably 50 parts by mass or less, even more preferably 15 parts by mass or less, and even more preferably 10 parts by mass or less, from the viewpoint of reducing the level of undissolved particles A.

[0073] In step 1, the mass ratio B / E of the amount of component B mixed to the amount of component E mixed is greater than 0, preferably 1.0 or more, more preferably 2.0 or more, and even more preferably 3.0 or more, from the viewpoint of reducing the level of undissolved material and improving stability, and is 28 or less, preferably 15 or less, more preferably 10 or less, and even more preferably 5 or less, from the viewpoint of reducing the level of undissolved material.

[0074] Step 1 may be a step having either Step 1-1 or Step 1-2, and from the viewpoint of improving stability, it is preferable to have Step 1-1. Step 1-1: A step of mixing particle A with component B and component E. Step 1-2: After mixing particle A and component B, component E is mixed in.

[0075] Step 1-1 may be, for example, a step of simultaneously mixing particle A with component B and component E. Step 1-1 may be, for example, a step of mixing particle A with a nonionic surfactant composition containing component B and component E.

[0076] In step 1-1, the nonionic surfactant composition contains component B in an amount of preferably 50% by mass or more, more preferably 60% by mass or more, and even more preferably 70% by mass or more, from the viewpoint of improving stability, and preferably 95% by mass or less, more preferably 90% by mass or less, and even more preferably 80% by mass or less, from the viewpoint of improving fluidity.

[0077] In step 1-1, the nonionic surfactant composition preferably contains 5% by mass or more, more preferably 10% by mass or more, and even more preferably 16% by mass or more of component E from the viewpoint of improving fluidity, and preferably 45% by mass or less, more preferably 40% by mass or less, and even more preferably 30% by mass or less from the viewpoint of improving stability.

[0078] In step 1-1, the amount of nonionic surfactant composition mixed is preferably 1 part by mass or more, more preferably 5 parts by mass or more, even more preferably 10 parts by mass or more, and preferably 100 parts by mass or less, more preferably 50 parts by mass or less, and even more preferably 30 parts by mass or less, per 100 parts by mass of particle A.

[0079] Step 1-2 may be, for example, a step of further mixing component E with particles obtained by mixing particle A and component B. The preferred range for the mixing amounts of component B and component E in step 1-2 is the same as the mixing amounts of component B and component E in step 1-1.

[0080] <Process 2> Step 2 is a step of mixing the particles B obtained in Step 1 or particles derived from particles B with component C0 to obtain particles C, wherein the mass ratio C0 / B of the amount of component C0 mixed to the amount of component B mixed is 0.15 or more. Step 2 may be a step of mixing the particles B or particles derived from particles B with component C in acid form. Furthermore, the amount of component B mixed in the mass ratio C0 / B may be the same as the amount of component B mixed in Step 1.

[0081] The mass ratio C0 / B of the amount of component C0 mixed to the amount of component B mixed is 0.15 or higher, preferably 0.20 or higher, preferably 1.0 or lower, more preferably 0.5 or lower, and even more preferably 0.3 or lower, from the viewpoint of reducing the level of undissolved residue.

[0082] Step 2 yields particles C containing components A, B, C, and E. Particle C may contain components A, B, C, and E, and component C0 may be neutralized near the surface of particle B or a particle derived from particle B. Furthermore, particle C contains component A, component B, component C and component E, and in particle C, component B may be preferably 10 parts by mass or more, more preferably 20 parts by mass or more, even more preferably 30 parts by mass or more, and preferably 100 parts by mass or less, more preferably 80 parts by mass or less, and even more preferably 60 parts by mass or less, per 100 parts by mass of component A, and component B may be preferably 5 parts by mass or more, more preferably 10 parts by mass or more, even more preferably 15 parts by mass or more, and preferably 50 parts by mass or less, more preferably 40 parts by mass or less, and even more preferably 30 parts by mass or less, per 100 parts by mass of particle A, and the mass ratio of the content of component C to component B C / B may be within the preferred range of the mass ratio C0 / B in terms of acid, and the mass ratio of the content of component B to component E B / E may be particles within the preferred range in step 1.

[0083] In step 2, the particles derived from particle B may be particles that have undergone processing other than that in step 2, such as a drying process or mixing of optional components, to the extent that it does not affect the present invention.

[0084] In step 2, for example, particle B can be sprayed with component C in acid form to obtain particle C. By spraying component C0 (component C in acid form) onto particle C, component C0 comes into contact with the surface of particle B and thickens, and component C0 is neutralized near the surface of particle C.

[0085] In step 2, the amount of component C0 (component C in acid form) mixed is preferably 2.0 parts by mass or more, more preferably 3.0 parts by mass or more, even more preferably 4.0 parts by mass or more, and preferably 50 parts by mass or less, more preferably 20 parts by mass or less, and even more preferably 10 parts by mass or less, from the viewpoint of reducing the level of undissolved particles A.

[0086] <Process 3> Step 3 is a step of mixing the particles C obtained in Step 2 or particles derived from particles C with component D0 to obtain particles D. Step 3 may be a step of mixing particles C or particles derived from particles C with component D in acid form. Step 3 yields particles D containing components A, B, C, D, and E. Particles D may be the detergent particles of the present invention.

[0087] In step 3, the particles derived from particle C may be particles that have undergone processing other than that in step 3, such as a maturation process or mixing of optional components, to the extent that it does not affect the present invention.

[0088] In step 3, for example, component D in acid form can be sprayed onto particle C to obtain particle D (detergent particles). By spraying component D0 onto particle C, the penetration of component D0 into the interior of particle C is suppressed, and component D0 can come into contact with a larger surface area of ​​particle C. As a result, component D can be more uniformly coated onto the surface of particle C.

[0089] In step 3, the amount of component D0 (component D in acid form) mixed is preferably 5 parts by mass or more, more preferably 10 parts by mass or more, per 100 parts by mass of particle A, from the viewpoint of reducing the level of undissolved particles and improving washability, and preferably 50 parts by mass or less, more preferably 30 parts by mass or less, and even more preferably 15 parts by mass or less, from the viewpoint of reducing the level of undissolved particles.

[0090] Furthermore, after step 3, an optional step (step 4) may be performed in which one or more components selected from the arbitrary components listed for detergent particles are mixed with particle D.

[0091] <Detergent composition> In an exemplary embodiment, the detergent composition of the present invention contains the detergent particles of the present invention. In the detergent composition of the present invention, preferred embodiments of the detergent particles are as described in the section on detergent particles of the present invention. Furthermore, the detergent composition of the present invention may be a solid detergent composition. From the viewpoint of improving solubility, the detergent composition of the present invention is preferably one or more detergent compositions selected from powder, granules, and solids. Furthermore, the detergent composition of the present invention may be a powder detergent composition.

[0092] <Detergent products> In an exemplary embodiment, the detergent article of the present invention comprises detergent particles of the present invention and a water-soluble film for packaging the detergent particles. The detergent particles of the present invention may be a detergent article in which the detergent particles of the present invention are packaged in a water-soluble film.

[0093] In this invention, "water-soluble" in the context of water-soluble films means that when 500 g of ion-exchanged water at 30°C is placed in a 1 liter glass beaker, a Teflon® stirring bar with a diameter of 10 mm (maximum diameter) and a total length of 8 cm is placed inside, 1 g of the film to be evaluated is added, and after stirring at 100 rpm for 30 minutes, no insoluble matter is visible. Furthermore, the thickness of the water-soluble film is preferably 1 μm or more, more preferably 10 μm or more, even more preferably 50 μm or more, and preferably 200 μm or less, more preferably 150 μm or less, and even more preferably 100 μm or less, from the viewpoint of preventing accidental ingestion and improving solubility.

[0094] Water-soluble films are preferably composed of polymers. Water-soluble films can be obtained by methods known in the art, such as casting, blow molding, extrusion, and injection molding of polymers. Non-limiting examples of polymers for producing water-soluble films include polyvinyl alcohol (PVA), vinyl alcohol copolymers, polyvinylpyrrolidone, polyalkylene oxides, (modified) cellulose, (modified) cellulose ethers or esters or amides, polycarboxylic acids and their salts such as polyacrylates, maleic acid / acrylic acid copolymers, polyamino acids i.e., peptides, polyamides such as polyacrylamide, polysaccharides such as starch and gelatin, and natural rubbers such as xanthan gum and carragum. Vinyl alcohol copolymers include copolymers of vinyl alcohol with other monomers, such as ethylene and acrylic acid. For example, from the viewpoint of using it as a water-soluble film to form a unit dose, the water-soluble film preferably contains a polymer selected from the group consisting of polyacrylate and water-soluble acrylate, methylcellulose, sodium carboxymethylcellulose, dextrin, ethylcellulose, hydroxyethylcellulose, maltodextrin, polymethacrylate, polyvinyl alcohol, vinyl alcohol copolymer, hydroxypropyl methylcellulose (HPMC), and combinations thereof. More preferably, the water-soluble film contains a polymer selected from polyvinyl alcohol, vinyl alcohol copolymer, and hydroxypropyl methylcellulose. Even more preferably, the water-soluble film contains polyvinyl alcohol, for example, Solbron, which is available from Aicello Corporation. Suitable polymers for producing water-soluble films are described, for example, in U.S. Patent No. 6,995,126.

[0095] In the detergent article of the present invention, the total surface area of ​​the water-soluble film that comes into contact with the detergent particles of the present invention is preferably 2 cm², from the viewpoint of further enhancing product stability. 2 More than 5cm 2 More preferably 7 cm 2 More preferably 15 cm 2From the above, and from the same viewpoint, preferably 100 cm 2 More preferably 70cm 2 Further preferably 60 cm 2 More preferably, 45 cm 2 The following applies:

[0096] The detergent articles of the present invention can be manufactured by any suitable process known in the art, such as a known process for manufacturing detergent pouches. Examples of pouch manufacturing processes are described in U.S. Patents No. 6,995,126, No. 7,127,874, No. 8,156,713, No. 7,386,971, No. 7,439,215, and U.S. Patent Application Publication 2009 / 199877.

[0097] The detergent article of the present invention has a content amount per unit that is preferably 5g or more, more preferably 8g or more, even more preferably 10g or more, and preferably 50g or less, more preferably 30g or less, and even more preferably 25g or less.

[0098] The preferred shape and size of each detergent article of the present invention is, for example, a quadrilateral shape, with a side length preferably between 1 cm and 5 cm, and a thickness preferably between 1 cm and 5 cm, more preferably between 1 cm and 4 cm. The preferred mass of each detergent article of the present invention is preferably 5 g or more, more preferably 10 g or more, even more preferably 15 g or more, and preferably 50 g or less, more preferably 40 g or less, and even more preferably 30 g or less.

[0099] Furthermore, another preferred shape and size per unit of the detergent article of the present invention is, for example, a rectangular parallelepiped, with a vertical length preferably 5 cm to 20 cm, more preferably 7 cm to 15 cm, a horizontal length preferably 0.5 cm to 4 cm, more preferably 1 cm to 2 cm, and a thickness preferably 0.5 cm to 5 cm, more preferably 1 cm to 2 cm. Also, the mass per unit of the detergent article of the present invention is preferably 5 g or more, more preferably 10 g or more, preferably 50 g or less, more preferably 40 g or less, even more preferably 30 g or less, and even more preferably 20 g or less.

[0100] The detergent particles, detergent compositions, and detergent articles of the present invention can be suitably used for textile products, hard surfaces such as tableware, and automatic dishwashers, and are preferably used for textile products.

[0101] When washing textile products with the detergent particles, detergent composition, or detergent article of the present invention, the fibers to be washed may be either hydrophobic fibers or hydrophilic fibers. Examples of hydrophobic fibers include protein-based fibers (milk protein casein fibers, Promix, etc.), polyamide-based fibers (nylon, etc.), polyester-based fibers (polyester, etc.), polyacrylonitrile-based fibers (acrylic, etc.), polyvinyl alcohol-based fibers (vinylon, etc.), polyvinyl chloride-based fibers (polyvinyl chloride, etc.), polyvinylidene chloride-based fibers (vinylidene, etc.), polyolefin-based fibers (polyethylene, polypropylene, etc.), polyurethane-based fibers (polyurethane, etc.), polyvinyl chloride / polyvinyl alcohol copolymer-based fibers (polycloral, etc.), polyalkylene parahydroxybenzoate-based fibers (benzoate, etc.), polyfluoroethylene-based fibers (polytetrafluoroethylene, etc.), 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, kapok, etc.), bast fibers (hemp, flax, ramie, cannabis, jute, etc.), leaf vein fibers (Manila hemp, sisal, etc.), coconut fibers, rush, straw, animal hair fibers (wool, mohair, cashmere, camel hair, alpaca, vicuña, angora, etc.), silk fibers (domestic silk, wild silk), feathers, and cellulose fibers (rayon, polynosic, cupro, acetate, etc.). From the viewpoint of finish quality, the fibers are preferably fibers containing cotton fibers. From the viewpoint of the finish quality of the fibers, the cotton fiber content is preferably 5% by mass or more, more preferably 10% by mass or more, even more preferably 15% by mass or more, even more preferably 20% by mass or more, even more preferably 40% by mass or more, even more preferably 60% by mass or more, even more preferably 80% by mass or more, and preferably 100% by mass or less, and may be 100% by mass.

[0102] In the present invention, "textile products" means fabrics such as woven fabrics, knitted fabrics, and nonwoven fabrics using the aforementioned hydrophobic or hydrophilic fibers, and products such as undershirts, T-shirts, dress shirts, blouses, slacks, hats, handkerchiefs, towels, knitwear, socks, underwear, and tights obtained using the same.

[0103] <How to wash textile products> The present invention provides a method for cleaning textile products using a cleaning solution (hereinafter referred to as the cleaning solution of the present invention) obtained by mixing the detergent particles, detergent composition, or detergent article of the present invention with water. In the method for washing textile products of the present invention, the embodiments described in the descriptions of the detergent particles, detergent composition, and detergent article of the present invention can be applied. In the method for washing textile products of the present invention, it is also possible to first prepare the washing solution of the present invention by adding the detergent particles, detergent composition, or detergent article of the present invention and water to a washing tank and mixing them, and then adding the textile product to be washed to wash the textile product. However, from the viewpoint of enjoying the effects of the present invention, it is preferable to add the detergent particles, detergent composition, or detergent article of the present invention, water, and the textile product to a washing tank, and wash the textile product at the same time as preparing the washing solution of the present invention while dissolving the detergent article of the present invention in water.

[0104] In the cleaning solution of the present invention, when mixing the detergent particles, detergent composition, or detergent article of the present invention with water, the amount of water used is such that, from the viewpoint of environmental considerations and improved cleaning performance, the total amount of detergent particles of the present invention contained in the detergent particles, detergent composition, or detergent article of the present invention per liter of water is preferably 0.01 g or more, more preferably 0.1 g or more, even more preferably 0.3 g or more, and preferably 10 g or less, more preferably 1 g or less, and even more preferably 0.5 g or less.

[0105] Furthermore, the water used in the washing method for textile products, such as the water used to prepare the washing solution and the water used for rinsing, is preferably hard water. From the viewpoint of improving washing power, the hardness of the water is preferably 1°dH or higher, more preferably 2°dH or higher, preferably 20°dH or lower, more preferably 15°dH or lower, even more preferably 10°dH or lower, and even more preferably 5°dH or lower on the German hardness scale. Here, German hardness (°dH) as used herein refers to the concentration of calcium and magnesium in water, expressed as a CaCO3 equivalent concentration of 1 mg / L (ppm) = approximately 0.056°dH (1°dH = 17.8 ppm). The calcium and magnesium concentrations for this German hardness are determined by chelation titration using ethylenediaminetetraacetate disodium salt. The specific method for measuring the German hardness of water as used herein is shown below.

[0106] <Method for measuring water hardness in Germany> 〔reagent〕 • 0.01 mol / L EDTA-2Na solution: A 0.01 mol / L aqueous solution of disodium ethylenediaminetetraacetate (titration solution, 0.01 M EDTA-Na2, manufactured by Sigma-Aldrich). • Universal BT Indicator (Product name: Universal BT, manufactured by Dojin Chemical Laboratories Co., Ltd.) • Ammonia buffer solution for hardness measurement (67.5g of ammonium chloride dissolved in 570mL of 28w / v% ammonia water, with the total volume diluted to 1,000mL using deionized water) [Measuring hardness] (1) Take 20 mL of water to be used as the sample into a conical beaker using a volumetric pipette. (2) Add 2 mL of ammonia buffer solution for hardness measurement. (3) Add 0.5 mL of Universal BT indicator. Confirm that the solution is reddish-purple after adding the indicator. (4) While shaking the conical beaker well, add the 0.01 mol / L EDTA·2Na solution dropwise from the burette, and the titration endpoint is reached when the sample water turns blue. (5) The total hardness is calculated using the following formula. Hardness (°dH)=T×0.01×F×56.0774×100 / A T:0.01mol / L Titration amount of EDTA・2Na solution (mL) A: Sample volume (20 mL, volume of water used as the sample) F: Factor of 0.01 mol / L EDTA-2Na solution

[0107] The cleaning solution of the present invention contains component A in an amount of preferably 20 ppm or more, more preferably 30 ppm or more, and even more preferably 50 ppm or more, from the viewpoint of improving cleaning power, and preferably 300 ppm or less, more preferably 200 ppm or less, and even more preferably 100 ppm or less, from the viewpoint of reducing the level of undissolved residue.

[0108] The cleaning solution of the present invention contains component B in an amount of preferably 5 ppm or more, more preferably 10 ppm or more, and even more preferably 20 ppm or more, from the viewpoint of improving cleaning power, and preferably 300 ppm or less, more preferably 250 ppm or less, and even more preferably 200 ppm or less, from the viewpoint of rinsability.

[0109] The cleaning solution of the present invention contains component C in an amount of preferably 1 ppm or more, more preferably 2 ppm or more, and even more preferably 5 ppm or more, from the viewpoint of reducing the level of undissolved components, and preferably 30 ppm or less, more preferably 20 ppm or less, and even more preferably 10 ppm or less, from the viewpoint of improving antibacterial properties.

[0110] The cleaning solution of the present invention contains component D in an amount of preferably 5 ppm or more, more preferably 10 ppm or more, and even more preferably 15 ppm or more, from the viewpoint of reducing the level of undissolved components, and preferably 50 ppm or less, more preferably 40 ppm or less, and even more preferably 30 ppm or less, from the viewpoint of improving the solubility of detergent particles.

[0111] If the cleaning solution of the present invention contains component F, component F is preferably contained in the cleaning solution at a concentration of 3 ppm or more, more preferably 5 ppm or more, and even more preferably 8 ppm or more, from the viewpoint of improving antibacterial properties, and preferably 50 ppm or less, more preferably 30 ppm or less, and even more preferably 20 ppm or less, from the viewpoint of improving cleaning performance.

[0112] If the cleaning solution of the present invention contains component G, component G is preferably contained in the cleaning solution at a concentration of 10 ppm or more, more preferably 20 ppm or more, and even more preferably 30 ppm or more, from the viewpoint of improving cleaning performance, and preferably 300 ppm or less, more preferably 200 ppm or less, and even more preferably 150 ppm or less, from the viewpoint of reducing streaks on clothing.

[0113] If the cleaning solution of the present invention contains component H, component H is preferably contained in the cleaning solution at a concentration of 0.5 ppm or more, more preferably 1 ppm or more, and even more preferably 1.5 ppm or more, from the viewpoint of improving cleaning performance, and preferably 50 ppm or less, more preferably 25 ppm or less, and even more preferably 10 ppm or less, from the viewpoint of improving stability and improving the dispersibility of hydrophobic particles.

[0114] If the cleaning solution of the present invention contains component K, component K is preferably contained in the cleaning solution at a concentration of 5 ppm or more, more preferably 10 ppm or more, and even more preferably 15 ppm or more, from the viewpoint of improving cleaning performance and stability, and preferably 200 ppm or less, more preferably 150 ppm or less, and even more preferably 100 ppm or less, from the viewpoint of improving stability.

[0115] If the cleaning solution of the present invention contains component L, component L is preferably contained in the cleaning solution at a concentration of 0.01 ppm or more, more preferably 0.1 ppm or more, and even more preferably 1 ppm or more, from the viewpoint of improving cleaning performance, and preferably 200 ppm or less, more preferably 150 ppm or less, and even more preferably 100 ppm or less, from the viewpoint of improving stability.

[0116] In recent years, washing machines have become larger, and the bath ratio, which is the ratio of the volume of washing solution (liters) to the mass of textile products (kg), has tended to decrease. This ratio is expressed as volume of washing solution (liters) / mass of textile products (kg) (hereinafter, this ratio may also be referred to as the bath ratio). When a bath ratio is small when using a household washing machine, friction between textile products increases due to agitation during washing, which may impair the finish of the textile products. From the viewpoint of improving washing performance, the bath ratio is preferably 5 or more, more preferably 10 or more, and even more preferably 20 or more. From the viewpoint of washing efficiency, it is preferably 100 or less, more preferably 50 or less, and even more preferably 30 or less.

[0117] The present invention relates to a method for washing textile products, which is suitable for a rotary washing method, in which the textile products are immersed in a liquid used for scouring while being fed by rollers or the like. A rotary washing method refers to a washing method in which textile products that are not fixed to a rotating machine are rotated around a rotating shaft together with the washing liquid. A rotary washing method can be carried out using a rotary washing machine. Therefore, in the present invention, from the viewpoint of suppressing undissolved detergent particles, it is preferable to wash the textile products using a rotary washing machine. Specifically, rotary washing machines include drum-type washing machines, pulsator-type washing machines, and agitator-type washing machines. These rotary washing machines can be those that are commercially available for household use. [Examples]

[0118] <Composition ingredients> The following components were used in the preparation of the detergent particles in the examples and comparative examples shown in Table 1. [Component A] • Sodium carbonate dense ash, manufactured by Central Glass Co., Ltd., average particle size 290 μm [Component B] Nonionic surfactant: Polyoxyethylene lauryl ether (average number of moles of oxyethylene: 10) [Component C0] LAS Dodecylbenzenesulfonic acid, Neoperex GS, manufactured by Kao Corporation [Component D0] • Fatty acids: Lauric acid, Lunac L-98, manufactured by Kao Corporation. [Component E] • Water with deionized water [Ingredient F] • Benzalkonium chloride, alkyldimethylbenzylammonium chloride, Sanizol B-50, manufactured by Kao Corporation. [Component G] • Zeolite Zeobuilder, manufactured by ZEOBUILDER, Type 4A, average particle size 3.5 μm • Bentonite smectite-type layered clay mineral "Odosolve K-400", median particle size 10 μm, main component [Mg a Al b (Si2O5)4(OH)4] X- · Me X+ a=1, b=3, X=1, Sodium content: 1.6%, Molar ratio [(Na+K+Li) / (Ca+Mg)] = 2.1, Manufactured by Kurosaki Hakudo Co., Ltd. [Component H] • Enzymes: Protease, Savinase 18T, Novozymes [Component K] Sodium polyacrylate, weight-average molecular weight 10,000 [Ingredient L] • PEG polyethylene glycol, weight-average molecular weight 6,000, manufactured by Fujifilm Wako Pure Chemical Industries, Ltd. 〔others〕 ·Fragrance ·Color grains

[0119] <Method for manufacturing particle A> 410 parts by mass of water were placed in a mixing tank, and after the water temperature reached 45°C, 110 parts by mass of sodium sulfate (Shikoku Chemicals, Inc., anhydrous neutral sodium sulfate) and 8 parts by mass of sodium sulfite (Mitsui Chemicals, Inc., sodium sulfite) were added and the mixture was stirred for 10 minutes. Further, 120 parts by mass of sodium carbonate was added, followed by 150 parts by mass of a 40% sodium polyacrylate aqueous solution, and the mixture was stirred for 10 minutes. Then, 40 parts by mass of sodium chloride (Nankai Salt Industry Co., Ltd., Nacle N) and 160 parts by mass of zeolite were added, and the mixture was stirred for 15 minutes to obtain a homogeneous slurry (slurry moisture content 50% by mass, temperature 50°C). The slurry was supplied to a spray drying tower (counterflow type) by pump, and sprayed at a spray pressure of 2.5 MPa from a pressure spray nozzle installed near the top of the tower. The high-temperature gas supplied to the spray drying tower was supplied from the bottom of the tower at a temperature of 285°C and discharged from the top of the tower at 98°C. The obtained spray-dried particles had a moisture content of 0.0%, a bulk density of 510 g / L, and an average particle size of 290 μm. The sodium carbonate (component A) content in the spray particles was 29.2% by mass. The obtained spray-dried particles and component A were mixed in the proportions shown in Table 1 to obtain particle A.

[0120] <Preparation of detergent particles> 1. Examples 1-11 Using the aforementioned ingredients, detergent particles as shown in Table 1 were prepared by the following method. (1) Preparation of particle B (Step 1) A nonionic surfactant composition was prepared by mixing components B, E, and L in the amounts listed in Table 1. Particles A and the nonionic surfactant composition containing components B, E, and L in the amounts specified in Step 1 of Table 1 were placed in a ribbon mixer (manufactured by Hosokawa Micron Corporation: 80L scale, with jacket; 65°C hot water flow rate 10L / min) and mixed under stirring conditions of the main shaft (agitating impeller, rotation speed: 33 rpm, peripheral speed: 0.6 m / sec) to prepare particles B. When component F was added in Step 1, component F was added after mixing the nonionic surfactant composition to prepare particles B. Component F was prepared by mixing a mixture of component F and water, but the water in the mixture was not included in the content of component F and was added to the amount of component E in Table 1. (2) Preparation of particle C (Step 2) Particles B obtained in step 1 and dodecylbenzenesulfonic acid (component C0) heated to 60°C were stirred and mixed in the ribbon mixer to perform a dry neutralization reaction and prepare particles C. The amount of component C0 used is as shown in Table 1. (3) Preparation of particle D (Step 3) Particles C obtained in step 2 and fatty acids of component D0, which were heated to 80°C, were mixed using a Nauter mixer to prepare particle D. The amount of component D0 included is as shown in Table 1. (4) Preparation of detergent particles (Step 4) Detergent particles were prepared by mixing the particles D obtained in step 3 with the optional components listed in step 4 of Table 1 (benzalkonium chloride, powdered bentonite, zeolite, colored granules, enzymes, and fragrances) in a kiln. The amounts of the optional components are as listed in step 4 of Table 1. For component F, benzalkonium chloride was mixed with a mixture of component F and water, but the water contained in this mixture was not included in the content of component F and was added to the amount of component E in Table 1.

[0121] 2. Comparative Examples 1-3 Comparative Example 1 is an example in which detergent particles were prepared in the same manner as in Example 1, except that the blending amounts were changed as shown in Table 1. In other words, the detergent particles of Comparative Example 1 are detergent particles prepared under conditions in which the mass ratio B / E of the amount of component B mixed to the amount of component E mixed in step 1 exceeds 30. Comparative Example 2 is an example in which detergent particles were prepared in the same manner as in Example 1, except that components C0 and D0 were blended simultaneously. In other words, Comparative Example 2 differs from Example 1 in the method of blending components C0 and D0. Comparative Example 3 is an example in which detergent particles were prepared in the same manner as in Example 8, except that the formulation amounts were changed as shown in Table 1. In other words, the detergent particles of Comparative Example 3 are detergent particles prepared in step 2 under the condition that the mass ratio of the content of component C0 to the content of component B, C0 / B, is less than 0.15.

[0122] <Manufacturing of detergent products> Two sheets of water-soluble polyvinyl alcohol film (13 cm long, 2 cm wide, 76 μm thick, M8685, manufactured by Monosol Co., Ltd.) were layered together, and three sides were fused together using a heat sealer (manufactured by Fuji Impulse Co., Ltd.), creating a bag with one side open. 13 g of each detergent particle listed in Table 1 was placed in this bag. The open side of the bag was then fused together using heat sealing to obtain a detergent product in which each detergent particle was packaged in the water-soluble film. The total surface area of ​​the water-soluble film in contact with the detergent particles was 30 cm². 2 However, the detergent article of the present invention is not limited to the manufacturing method described above.

[0123] <Method for calculating the average particle size of detergent particles> The average particle size of the detergent particles in Table 1 was 250 μm. The average particle size of the detergent particles was calculated from the mass fraction based on the sieve size after vibrating them for 5 minutes using a standard sieve according to JIS Z 8801.

[0124] <Method for calculating the total water content in detergent particles> 3.0 g of detergent particles were dried at 200°C for 723 minutes using an infrared moisture meter FD-720. The total moisture content in the detergent particles was calculated based on the change in mass before and after drying. The results are shown in Table 1.

[0125] <Method for calculating total calorific value> The detergent particles shown in Table 1 were placed in a refrigerator at 5°C and left for 30 minutes. 10g of these detergent particles (at 5°C) were added to 40g of 5°C water, and the water temperature was measured after 300 seconds. The total heat generated was calculated from the rise in water temperature, and the total heat generated from the time the detergent particles were added to 40mL of 5°C water until 300 seconds later was calculated. The results are shown in Table 1. The total calorific value was calculated using the following formula (1). In this formula, the water temperature after 300 seconds is the water temperature 300 seconds after adding the detergent particles. The initial temperature was 5°C, the specific heat capacity of water was 4.18 J / g·°C, the water volume was 40 mL, and the amount of detergent particles was 10 g. The detergent particles were passed through a sieve with a mesh size of 2,000 μm before being used to evaluate the total calorific value. Total heat generation (kJ / kg) = [(Water temperature after 300 seconds) - (Initial temperature)] × (Specific heat capacity of water) × (Amount of water) / (Amount of detergent particles) (1)

[0126] <Solubility Evaluation> The solubility of the detergent products in the examples and comparative examples in Table 1 was evaluated by washing clothes under conditions that made it easy to evaluate undissolved residue (i.e., conditions that easily resulted in undissolved residue). Specifically, the undissolved residue level was calculated using the following formula (2) based on the number and diameter of undissolved detergent particles that adhered to the clothes after washing under conditions that easily resulted in undissolved residue. (1) Washing conditions I prepared four sets of two each of trousers (UNIQLO), sweatshirts (UNIQLO), boxer shorts (UNIQLO), socks (UNIQLO), and long-sleeved shirts (HEATTECH, UNIQLO), along with a cotton shirt (YG, Gunze Corporation) to bring the total weight to 8.0 kg. I put two packets of the above detergent into a drum-type washing machine (NA-VG1000L, Panasonic), then added the prepared clothes, and washed them using tap water (Wakayama City water) adjusted to 5°C on a standard course (water volume as needed), with a wash time of 9 minutes, one rinse, and a spin-dry time of 6 minutes. (2) Method for calculating the level of undissolved material After washing, all washed clothes were visually inspected, and any undissolved detergent particles were collected. The diameter (maximum diameter, mm) of the collected residue was measured with calipers. The above washing procedure was repeated 18 times, and the level of undissolved detergent was calculated each time based on the following formula (2), and the total for 18 washes was calculated. The results are shown in Table 1. A lower score indicates better solubility of the detergent, and furthermore, of the detergent particles and detergent composition. A level of undissolved detergent of 40 or less is preferable. The detergent particles in Table 1 contain components A, B, and C, and have excellent cleaning properties, for example, for textile products. Undissolved level = Σ[(Number of residue particles) × (Diameter of residue particles)] (2)

[0127] [Table 1]

Claims

1. Detergent particles containing the following components A, B, C, and D, and satisfying requirement 1 below. Ingredient A: Alkali metal carbonate Ingredient B: Nonionic surfactant Component C: Alkylbenzenesulfonic acid or its alkali metal salt Component D: Fatty acid or its alkali metal salt Requirement 1: The total heat generated after 300 seconds from the time 10g of detergent particles is placed in 40mL of 5°C water is 200kJ / kg or less.

2. The detergent particles according to claim 1, wherein the content of component B in the detergent particles is 5% by mass or more and 20% by mass or less, the content of component C is 0.1% by mass or more and 5% by mass or less in terms of acid, and the content of component D is 0.1% by mass or more and 10% by mass or less in terms of acid.

3. A method for producing detergent particles, comprising the following steps 1, 2, and 3. Step 1: A step of mixing particles A containing alkali metal carbonate (component A), a nonionic surfactant (component B), and water (component E) to obtain particles B, wherein the mass ratio B / E of the amount of component B to the amount of component E is greater than 0 and less than or equal to 28. Step 2: The particles B obtained in Step 1 or particles derived from the particles B, and alkylbenzene sulfonic acid (component C ０ The process involves mixing the above-mentioned component C to obtain particles C. ０ The mass ratio C of the amount of mixture C to the amount of mixture C of the above component B ０ / A process where B is 0.15 or higher Step 3: The particles C obtained in Step 2 or particles derived from the particles C, and fatty acids (component D) ０ The process of mixing ) and to obtain particle D.

4. The method for producing detergent particles according to claim 3, wherein step 1 comprises step 1-1 or step 1-2 described below. Step 1-1: A step of mixing the particle A with component B and component E to obtain the particle B. Step 1-2: A step in which particle A and component B are mixed, and then component E is mixed in to obtain particle B.

5. The method for producing detergent particles according to claim 4, wherein step 1-1 is a step of mixing the particle A with a nonionic surfactant composition containing component B and component E to obtain the particle B, and the nonionic surfactant composition contains 5% by mass or more and 45% by mass or less of component E.

6. A detergent composition containing the detergent particles described in claim 1 or 2.

7. A detergent article comprising detergent particles according to claim 1 or 2 and a water-soluble film for packaging the detergent particles.

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