JP2003193091A - Hydrous inorganic particles and detergent composition containing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an inorganic particle free from the problem of the formation of insoluble material by coagulating in cold water, and obtain a detergent composition containing the particle. <P>SOLUTION: The water-containing inorganic particle is produced by including water in a particle mixture containing (a) at least one kind of inorganic particle having a dissolution time of ≥30 min determined by a specific solubility test method and (b) at least one kind of inorganic particle having a dissolution time of ≤20 min. The amount of the water included in the particles is 5-50 wt.% based on the maximum amount of water holdable by the components (a) and (b). This invention further provides the detergent composition containing the water-containing inorganic particle. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to water-containing inorganic particles and a detergent composition containing the same, and more particularly, to inorganic particles which do not insolubilize by forming aggregates in cold water and a detergent containing the same. It relates to a composition.

[0002]

2. Description of the Related Art Inorganic components such as carbonates, sulfates, sulfites and phosphates are generally uniformly mixed with other detergent components by the following methods (1) to (4) to form a detergent composition. It was blended with the thing. (1) A method in which the above inorganic components are dissolved / dispersed in water together with other detergent components such as a surfactant, zeolite, and a water-soluble polymer to prepare an aqueous slurry, and then spray-dried (JP-A-63-1).
22797, Japanese Patent Publication No. 10-512007, etc.). (2) A method in which a spray-dried product prepared by a method similar to the above (1) is uniformly kneaded with the above-mentioned other components in a kneader or the like (Japanese Patent Publication No. 6-72237, Japanese Patent Publication No. 8-16235, etc.). (3) A method in which a spray-dried product prepared by a method similar to the above-mentioned (1) is subjected to a granulation treatment with the above-mentioned other components by a stirring granulator (Japanese Patent Publication No. 4-5080, Japanese Patent Publication No. 6-80160, etc.). ). (4) Method of uniformly kneading the above-mentioned inorganic components together with the above-mentioned other components with a kneader or the like (Japanese Patent Publication No. 2-7360, Japanese Patent Publication No. 4-5)
666 publication). The inorganic component uniformly blended in the detergent composition by the method as described above had excellent solubility in cold water. In recent years, in order to reduce the load on the environment, a method for producing a detergent composition such as a granular detergent without spray drying has been studied, and the above-mentioned inorganic components in the form of particles are mixed with other detergent components (granulate) and powder. Producing methods of body mixing and post-adding have been proposed (Japanese Patent Publication No. 7-15118, Japanese Patent Publication No. 7-509267, etc.). Such a method for producing a detergent composition is simple and consumes less energy, and is promising in the future.

[0003]

However, in the detergent composition obtained by the above method, the powder-mixed inorganic component particles (inorganic particles) are aggregated in cold water, particularly in water at a temperature of 10 ° C. or less. It has been found that there is a problem that the detergent composition is difficult to dissolve in cold water because it forms a substance and becomes insoluble. In particular, inorganic particles such as sodium carbonate, sodium sulfate, sodium sulfite, and trisodium phosphate were significantly insolubilized in cold water. The present invention has been made in view of such circumstances, and an object thereof is to provide inorganic particles that do not insolubilize by forming aggregates in cold water, and a detergent composition containing the same.

[0004]

Means for Solving the Problems As a result of intensive studies to solve the above problems, the present inventors have found that inorganic particles having a property of forming an insoluble matter in cold water and insolubilizing them and inorganic particles easily dissolved in cold water. The present invention has been completed by finding that inorganic particles having excellent solubility in cold water can be obtained by allowing a particle mixture with particles to hold a specific amount of water.

That is, the water-containing inorganic particles of the present invention are as follows (1). (1) Inorganic particles that are essentially soluble in water and have a dissolution time at 5 ° C. according to the following solubility test method: a) at least one kind of inorganic particles having a time of 30 minutes or more; and b) having a time of 20 minutes or less. A particle mixture containing at least one kind of inorganic particles, wherein the particle mixture has a maximum content of 5 to 5 relative to the maximum amount of water of crystallization that a) and b) can have.
Water-containing inorganic particles, characterized by containing 0% by weight of water. <Solubility test method> A magnetic stirrer (diameter: 15 mm, total length: 52 mm) was placed in a cylindrical 1 L beaker with an inner diameter of 105 mm.
(Cylindrical column) is placed in the center of the bottom surface, and a stainless steel sieve with a mesh size of 355 μm (diameter 75 mm × height 20 mm) is set using wire so that the wire mesh is 50 mm above the bottom of the beaker. Add 700 mL of tap water at ℃. A 5g sample of a boat-shaped plastic weighing dish (55m long)
m × width 35 mm × height 13 mm), gently place on a sieving wire mesh while allowing water to soak, and leave still for 5 minutes. Then, the sample is gently transferred from the weighing dish onto the sieve, and the time from when the sample is no longer visible on the sieve is measured from the start of stirring with the stirring bar at 500 rpm using a magnetic stirrer. Is the dissolution time.

The hydrous inorganic particles of the present invention can be produced by the following method (2). (2) Inorganic particles that are essentially soluble in water, and have a dissolution time at 5 ° C. according to the above-mentioned solubility test method: a) at least one inorganic particle having a dissolution time of 30 minutes or more; A particle mixture is prepared by mixing with certain at least one type of inorganic particles, and the particle mixture contains 5 to 5 relative to the maximum amount of water of crystallization that a) and b) can have.
A method for producing hydrous inorganic particles, which comprises containing 0% by mass of water.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in more detail below. In the present invention, the inorganic particles essentially soluble in water mean that the solubility in water at 5 ° C. is 1 g / 100 water.
The inorganic particles are g or more, and the solubility of the inorganic particles changes according to the change of the water temperature. The present invention promotes the solubility of these inorganic particles, of which the dissolution time is 30 minutes or more in the above-mentioned solubility test method. It is presumed that such inorganic particles are difficult to be dissolved in cold water because they have a property of forming neighboring particles by entraining neighboring particles in the process of hydration. In the above solubility test method,
The inorganic particles to be tested have a particle size in the range of 100 mesh to 16 mesh (particle size of about 150 to 1 mm) with a JIS standard sieve.

Specific examples of the inorganic particles having a dissolution time of 30 minutes or more include sodium carbonate, sodium sulfate, trisodium phosphate, and sodium sulfite (meaning that crystal water is not mentioned is an anhydrous salt). ) And the like.

In the present invention, the at least one inorganic particle having a dissolution time of b) of 20 minutes or less is preferably 10 minutes or less, particularly 1 to 9 minutes.
As a specific example of such inorganic particles, sodium carbonate 1
0-hydrate, potassium carbonate, sodium sulfate 10-hydrate, potassium sulfate, zinc sulfate 7-hydrate, trisodium phosphate 12-hydrate, sodium hydrogen carbonate, potassium hydrogen carbonate, sodium potassium carbonate, sodium sesquicarbonate dihydrate, etc. Can be mentioned. Of the above-mentioned inorganic particles, preferably, sodium carbonate decahydrate, potassium carbonate, sodium sulfate decahydrate,
Potassium sulfate, sodium hydrogen carbonate, potassium hydrogen carbonate, sodium potassium carbonate, sodium sesquicarbonate 2
For example, water salt.

In the present invention, a particle mixture is prepared by mixing a) at least one inorganic particle having a dissolution time of 30 minutes or more and b) at least one inorganic particle having a dissolution time of 20 minutes or less, 5 to 50% by mass, preferably 5 to 50% by mass, based on the maximum amount of water of crystallization that a) and b) can have in the particle mixture.
A water content of 9 to 50 mass% is contained. If the amount of water is less than 5% by mass, the effect of the present invention may not be obtained.
If it exceeds 0 mass%, a particle mixture having good fluidity may not be obtained.

The mass ratio (a / b) between a) and b) is preferably 3/1 to 1/2. If the mass ratio is outside the above range, it may not be possible to obtain a product having excellent solubility in cold water.

The maximum amount of crystal water that a) and b) can have is determined by, for example, a) is sodium carbonate,
When b) is potassium carbonate and the particle ratio is a / b = 50/50, the particle ratio is as follows. Since the maximum amount of crystal water that a) of sodium carbonate can have is 10 water and the maximum amount of crystal water that b) of potassium carbonate can have is 2 water, the total mass of a) and b) is 100. The maximum amount of crystal water that can be held is calculated by the following formula. 10 × 18 × 50 ÷ 106 + 2 × 18 × 50 ÷ 138.
2 = 97.9 The particle mixture contains 5 to 50% by mass of water based on the maximum amount of crystal water that can be held.

As a method for incorporating the above-mentioned amount of water into the particle mixture, a method of preparing the above-mentioned particle mixture and adding a predetermined amount of water thereto is preferable. As the water, water from inorganic particles having a hydrated salt, bulk water, water droplets (spray), water vapor, high humidity gas (air, nitrogen, etc.) can be used. When water is added to the particle mixture, it is preferable to gradually add water while maintaining the fluidity of the particle mixture. When a large amount of water is added, or when a predetermined amount of water is added all at once to the particle mixture, the fluidity of the particle mixture may decrease. When present, the particle size may be adjusted by crushing treatment, sieving or the like, and it is preferable to adjust the particle size by crushing treatment, sieving or the like.

The water-containing inorganic particles of the present invention are soluble in cold water by causing some chemical reaction such as ion exchange or change in crystal structure due to hydration when the particle mixture contains a predetermined amount of water as described above. It is presumed that it has changed to an excellent one. The water content in the water-containing inorganic particles varies depending on the chemical species of the inorganic particles and the water content, but is presumed to exist as crystal water and free water.

As the apparatus for producing the water-containing inorganic particles of the present invention, a mixer equipped with stirring blades such as a ribbon mixer, a Loedige mixer, a high speed mixer, and a sugi mixer, a fluidized bed granulator, and a powder bed granulator. A fluidized mixer such as a granulator, a drum mixer, a V-shaped mixer, or a rolling granulator such as a dish granulator can be used. In addition to this, water can be included in the step of transporting the particle mixture prepared by the above method. For example, a method may be mentioned in which water is sprayed onto the particle mixture on the belt conveyor or in the air transportation pipe, and then treated with a mixing means such as a baffle plate or a mixer.

In the present invention, it is particularly preferable that the inorganic particles are selected from carbonates, hydrogencarbonates, sesquicarbonates, sulfates, sulfites and phosphates, because remarkable effects can be expected. As the salt, a metal salt of alkali metal, alkaline earth metal, zinc or the like, ammonium salt or the like can be used, and it is particularly preferable that the inorganic particles are an alkali metal salt.

The hydrated inorganic particles of the present invention can be suitably incorporated into a detergent composition. In particular, it is suitable for detergent compositions such as granular detergents, tablet detergents and briquette detergents. It is desirable to mix the water-containing inorganic particles in the detergent composition so as to be contained in an amount of preferably 5 to 60% by weight, particularly preferably 10 to 50% by weight. The water-containing inorganic particles can be powder-mixed with the granulated particles containing a surfactant, or can be blended in the granulation step of the detergent composition or the like. The hydrated inorganic particles are hydrated inorganic particles such as powder-mixed with granulated particles containing a surfactant which is an intermediate product of the detergent manufacturing process, or post-mixed with detergent particles close to the final product. It is preferable to mix the particles by simply mixing them with other granules of the detergent component in a powder form, because a remarkable effect can be expected. The particle size of the hydrated inorganic particles blended in the detergent composition is
Preferably, it is 100 to 2000 μm, more preferably
It is preferably 150 to 1500 μm, and more preferably 200 to 1000 μm. The average particle size is preferably 200-12
The thickness is preferably 00 μm, more preferably 300 to 1000 μm.

In the present invention, in the case of the granular detergent composition, the bulk density is 0.3 to 1.2 g / cm ³ , preferably 0.6 to 1.2 g / cm ³ , and particularly 0.7 to 1 g /
It is preferable to set it to cm ³ . Particle size is 100-300
0 μm, preferably 200-2000 μm, especially 30
The range of 0 to 1500 μm is preferable. The average particle size is 200 to 1500 μm, preferably 300 to 1
The thickness is preferably 200 μm, particularly 350 to 1000 μm. The granular detergent composition can be produced by a method such as a kneading extrusion granulation method, a kneading crushing granulation method, a rolling granulation method, and a stirring granulation method.

In the detergent composition containing the hydrous inorganic particles of the present invention, a surfactant, which is usually added to laundry detergents,
A chelate builder and other ingredients can be added. Examples of the surfactants include various surfactants such as anionic surfactants, nonionic surfactants, cationic surfactants and amphoteric surfactants, which may be used alone or in combination of two or more. Can be used. The total amount of these surfactants in the composition is preferably 5 to 50% by mass, more preferably 10 to 40% by mass.

The anionic surfactant has 10 carbon atoms.
~ 14 linear alkyl benzene sulfonate, carbon number 1
3 to 19 α-sulfofatty acid lower alkyl (1 to 1 carbon atoms
3) An ester salt, an alkyl sulfate ester salt having 10 to 20 carbon atoms, a saturated or unsaturated fatty acid salt having 12 to 22 carbon atoms, and the like can be preferably used. As these salts, alkali metal salts such as sodium salts and potassium salts, amine salts, ammonium salts and the like can be used.

Examples of preferable nonionic surfactants include the following. (1) An EO-added nonionic surfactant (alkyl ether ethoxylate) in which ethylene oxide (EO) is added in an average of 5 to 30 mol to an alcohol having an average of 10 to 20 carbon atoms. (2) Ethylene oxide (EO) and propylene oxide (PO) in alcohol having an average carbon number of 10 to 20
An EO-PO-added nonionic surfactant having an average of 5 to 30 moles added. (3) A fatty acid ester type nonionic surfactant represented by the following chemical formula 1. [Chemical Formula 1] R1-CO (OR2) nOR3 (In the formula, R1 has 5 to 21 carbon atoms, preferably 9 to 9 carbon atoms.
17 alkyl group or alkenyl group, R2 has 2 carbon atoms
˜4, and it is preferable that EO is independently added or EO and PO are mixed and added to form OR2.
Is an alkyl group having 1 to 4 carbon atoms, preferably 1 to 2 carbon atoms
, An n is the average number of moles of OR2 added, and
Indicates a number of -30, preferably a number of 5-20. )

The chelate builder is preferably an inorganic compound such as condensed phosphate such as aluminosilicate, silicate, layered silicate, tripolyphosphate or pyrophosphate,
Examples thereof include organic compounds such as polycarboxylic acid salts such as polyacrylic acid and acrylic acid-maleic acid copolymers, citrate salts, and aminocarboxylic acid salts.

As other components, the following components can be blended. (1) As a fluorescent agent, a bis (triazinylamino) stilbene disulfonic acid derivative, a bis (sulfostyryl) biphenyl salt [Tinopearl CBS-X] and the like. (2) As the enzyme, lipase, protease, cellulase, amylase and the like. (3) As a bleaching agent, percarbonate, perborate and the like. (4) As a bleach activator, an alkanoyloxybenzenesulfonic acid / salt having a carbon number of 11 to 19, a carbon number of 8 to 19
Alkanoyloxybenzoic acid / salt etc. (5) As surface modifiers, fine powder calcium carbonate, fine powder zeolite, granular zeolite, polyethylene glycol and the like. (6) Cellulose derivatives such as carboxymethyl cellulose as recontamination inhibitors. (7) Amorphous silicic acid anhydride, calcium silicate, etc. as the porous oil absorbing agent. (8) As an oil gelling agent, 12-hydroxystearic acid, metal soap and the like. (9) Reducing agents sodium sulfite, potassium sulfite and the like. (10) Disintegrants Granulated products of powdered cellulose, crosslinked carboxymethyl cellulose, carboxymethyl cellulose calcium and the like. (11) As a rinse agent, silicone oil or the like. (12) Perfume For example, the perfume composition described in Japanese Patent Application No. 2000-346626.

[0024]

EFFECTS OF THE INVENTION According to the present invention, it is possible to provide an inorganic particle which does not insolubilize by forming an aggregate in cold water, and a detergent composition containing the same.

[0025]

EXAMPLES Next, the present invention will be described in detail with reference to examples, but the present invention is not limited to these examples.

Examples 1 to 18 and Comparative Examples 1 to 4 Hydrous inorganic particles (particle mixture in the table) having the compositions shown in Tables 1 to 4 were prepared by the following method, and the dissolution time was determined by the following solubility test method. It was measured. Furthermore, the low-temperature solubility of the detergent in the granular detergent composition containing the hydrous inorganic particles having the composition shown below was evaluated by the following method (detergent cloth adhesion). The results of these evaluations are also shown in Tables 1 to 4. It can be seen that the hydrous inorganic particles of the present invention and the granular detergent composition containing the same exhibit excellent solubility in cold water. In Tables 1 to 4, the maximum amount of crystal water that a) and b) can have is described as the maximum amount of crystal water.

1) Preparation of Hydrous Inorganic Particles Inorganic particles a) and inorganic particles b) shown in Tables 1 to 4 were mixed in a mass ratio shown in the table with a ribbon mixer, and water was sprayed while stirring the mixture. A fixed amount of water was included. 1 at room temperature
After leaving for a day, Trio Blender (manufactured by Trio Science)
Over time, the agglomerates were loosened and ground. Then, using a sieve of 16 mesh and 100 mesh, a particle size of 150-1
Hydrous inorganic particles in the range of 000 μm were obtained.

2) Measurement of Dissolution Time of Hydrous Inorganic Particles (Particle Mixtures in Tables 1 to 4) In a cylindrical 1L beaker having an inner diameter of 105 mm, a magnetic stirrer (a cylindrical shape having a diameter of 15 mm and a total length of 52 mm) was placed at the center of the bottom surface. Placed in a section, a stainless steel sieve having a mesh size of 355 μm (diameter 75 mm × height 20 mm) was set using a wire so that the wire mesh would come to a height of 50 mm from the bottom of the beaker, and 700 mL of tap water at 5 ° C. was put therein. . A 5g sample of a boat-shaped plastic weighing dish (length 55mm x width 35mm x
Weigh it to a height of 13 mm), gently place it on a sieving wire mesh while allowing it to soak in water, and let it stand for 5 minutes. Then, the sample is gently transferred from the weighing dish onto the sieve, and the time from when the sample is no longer visible on the sieve is measured from the start of stirring with the stirring bar at 500 rpm using a magnetic stirrer. Was taken as the dissolution time.

3) Preparation of Detergent Composition 75 parts by mass of a base granular detergent having the following composition and 25 parts by mass of a particle mixture shown in Tables 1 to 4 were mixed with a ribbon mixer to form a granular detergent composition containing hydrous inorganic particles. The product (bulk density 0.8 to 0.9 g / cm ³ ) was prepared. Base granular detergent <Composition> Component Blending amount (parts by mass) α-SF-Na 10 LAS-K 8 Soap 7 Nonion 5 Zeolite 23 AA / MA 2.5 Sodium sulfite 1.5 Enzyme 1.0 Fluorescent agent 0.2 Fragrance 0.1 Moisture 5.0 Total 63.3 Average particle size of base detergent: 550 μm Bulk density of base detergent: 0.85 g / cm ³

4) Adhesion of detergent cloth To the washing machine, put 30 L of water at 10 ° C.
After soaking in kg water, 40 g of the detergent composition is added. Two
After leaving it for a minute, it is washed in a weak water flow course for 5 minutes, then discharged and dehydrated for 1 minute. Take out the cloth and visually observe the adhesion state of particles,
The following evaluation criteria are used for evaluation. ◯: No adhesion at all Δ: Very slight adhesion, but good level by rinsing ×: Level where some adhesion is seen XX: Adhering considerably to the entire cloth

The components used in the examples and comparative examples are
It is as follows. Α-SF-Na: sodium salt of α-sulfofatty acid methyl ester having an alkyl group having 14 or 16 carbon atoms (mass ratio C14 / C16 = 2/8) LAS-K: straight-chain alkyl (having 10 to 10 carbon atoms) 14) Potassium benzenesulfonate / AS-Na: sodium lauryl sulfate, 95% pure,
Lion Co., Ltd., Sannor LM-1100NT Soap: Fatty acid sodium having an alkyl group having 12 to 18 carbon atoms Nonion: Diadol 13 (manufactured by Mitsubishi Chemical) 15 mol of ethylene oxide on average, 3 mol of propylene oxide on average -Zeolite: A-type zeolite (Shilton B, manufactured by Mizusawa Chemical Co., Ltd.)-AA / MA: Sodium salt of acrylic acid / maleic acid copolymer, trade name Sokalan CP7 (manufactured by BASF) -Sodium sulfite: anhydrous sodium sulfite (Mitsui Chemicals ( Co., Ltd.)-Sodium carbonate: anhydrous sodium carbonate (Asahi Glass) -Sodium carbonate-10 decahydrate: Junsei Chemical-Potassium carbonate: Anhydrous potassium carbonate (Asahi Glass) -Potassium hydrogen carbonate: Junsei Chemical-Sodium potassium carbonate: Kanto Kagaku-Sodium Sulfate: Neutral anhydrous Glauber's salt (Nippon Kagaku) -Sulfuric acid Thorium-decahydrate: manufactured by Junsei Chemical Co., Ltd. Potassium sulfate: manufactured by Junsei Chemical Co., Ltd., trisodium phosphate: manufactured by Kishida Chemical Co., trisodium phosphate · dodecahydrate: manufactured by Junsei Chemical Co., Ltd. Fluorescent agent: Tinopal CBS-X and Tinopal AMS
-GX (manufactured by Ciba Specialty Chemicals) in a mass ratio of 1 / 1-Enzyme: Protease, trade name Cannase 12T (manufactured by Novozymes) -Perfume: Japanese Patent Application No. 2000-346626 Tables 11-18
A composition described in 1.

[0031]

[Table 1]

[0032]

[Table 2]

[0033]

[Table 3]

[0034]

[Table 4]

Continued front page    (72) Inventor Toshiyuki Watanabe             1-3-7 Honjo, Sumida-ku, Tokyo Rio             Within the corporation F-term (reference) 4H003 AB03 AB19 AB21 AB44 AC08                       AC23 BA09 EA08 EA12 EA16                       EA28 EB32 EC02 FA09 FA32

Claims (4)

[Claims] 1. Inorganic particles essentially soluble in water,
A particle mixture containing at least one type of inorganic particles having a dissolution time at 5 ° C. according to the following solubility test method of a) 30 minutes or more and b) at least one type of inorganic particles having a dissolution time of 20 minutes or less. And 5 to 5 with respect to the maximum amount of water of crystallization that a) and b) can have in the particle mixture.
Water-containing inorganic particles, characterized by containing 0% by weight of water. <Solubility test method> A magnetic stirrer (diameter: 15 mm, total length: 52 mm) was placed in a cylindrical 1 L beaker with an inner diameter of 105 mm.
(Cylindrical column) is placed in the center of the bottom surface, and a stainless steel sieve with a mesh size of 355 μm (diameter 75 mm × height 20 mm) is set using wire so that the wire mesh is 50 mm above the bottom of the beaker. Add 700 mL of tap water at ℃. A 5g sample of a boat-shaped plastic weighing dish (55m long)
m × width 35 mm × height 13 mm), gently place on a sieving wire mesh while allowing water to soak, and leave still for 5 minutes. Then, the sample is gently transferred from the weighing dish onto the sieve, and the time from when the sample is no longer visible on the sieve is measured from the start of stirring with the stirring bar at 500 rpm using a magnetic stirrer. Is the dissolution time. 2. Inorganic particles essentially soluble in water,
A dissolution time according to the following solubility test method at 5 ° C .: a) at least one kind of inorganic particles having a time of 30 minutes or more and b) at least one kind of inorganic particles having a time of 20 minutes or less are mixed to obtain a particle mixture. 5 to 5 times the maximum amount of water of crystallization that a) and b) can have in the particle mixture.
A method for producing hydrous inorganic particles, which comprises containing 0% by mass of water. <Solubility test method> A magnetic stirrer (diameter: 15 mm, total length: 52 mm) was placed in a cylindrical 1 L beaker with an inner diameter of 105 mm.
(Cylindrical column) is placed in the center of the bottom surface, and a stainless steel sieve with a mesh size of 355 μm (diameter 75 mm × height 20 mm) is set using wire so that the wire mesh is 50 mm above the bottom of the beaker. Add 700 mL of tap water at ℃. A 5g sample of a boat-shaped plastic weighing dish (55m long)
m × width 35 mm × height 13 mm), gently place on a sieving wire mesh while allowing water to soak, and leave still for 5 minutes. Then, the sample is gently transferred from the weighing dish onto the sieve, and the time from when the sample is no longer visible on the sieve is measured from the start of stirring with the stirring bar at 500 rpm using a magnetic stirrer. Is the dissolution time. 3. The hydrated inorganic particles according to claim 1, or the hydrated particles according to claim 2, wherein the inorganic particles are selected from carbonates, hydrogencarbonates, sesquicarbonates, sulfates, sulfites and phosphates. Method for producing inorganic particles. 4. A detergent composition containing the water-containing inorganic particles according to claim 1.