JPH11181484A - Detergent composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a composition hardly causing caking, capable of manifesting stable detergency for a long period and suitable for a detergent, especially the one for a hard material by including sodium percarbonate having the surface coated with a specific component such as a surfactant, and an alkali metal silicate. SOLUTION: The objective composition comprises sodium percarbonate having the surface coated with a surfactant (preferably a nonionic surfactant having a hydrophilic group containing ethylene oxide group and/or propylene oxide group, and a hydrophobic group containing a 6-8C aliphatic hydrocarbon), a polyalkylene glycol (preferably a polyethylene glycol or a polypropylene glycol) or an inorganic metal salt, and an alkali metal silicate. The weight ratio of the sodium percarbonate to the surfactant, the polyalkylene glycol or the inorganic metal salt is preferably (1001)-(10,000:1).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a detergent composition which hardly causes caking and can exhibit a long-term stable detergency, and is particularly suitable as a detergent for hard bodies.

[0002]

2. Description of the Related Art Oil and fat stains originating from foods are altered by the action of heat, sunlight, oxygen in the air, etc., and become sticky resinous or semi-dry. Often have. As a technique for removing such altered soil, Japanese Patent Publication No. 53-1168 discloses an alkaline strong cleaning agent, that is, an alkaline agent such as ammonia, monoethanolamine and sodium hydroxide, and a water-soluble agent such as cellosolve and carbitol. Disclosed is a detergent composition comprising a ionic solvent and a surfactant. However, this cleaning agent has a problem that it cannot be used depending on a cleaning target because it has corrosiveness (damage) to a metal surface such as aluminum.

In order to solve such problems, Applicants have developed a bleaching detergent for hard surfaces containing a hydrogen peroxide emitter, a specific bleach activator and a crystalline or amorphous alkali metal silicate. A composition has been proposed (Japanese Unexamined Patent Publication No.
No. 337796, Japanese Patent Application No. 9-127373). This composition has high detergency and suppresses damage to the object to be cleaned (substrate damage), and is less likely to cause problems such as corrosion when applied to metals such as aluminum. It is excellent. However, this composition may cause caking due to moisture absorption,
There is room for improvement in storage stability.

An object of the present invention is to provide a detergent composition which has excellent detergency, suppresses damage to a substrate, and has excellent storage stability which does not easily cause caking even during long-term storage. Aim.

[0005]

Means for Solving the Problems As a result of repeated studies to achieve the above object, the present inventors have found that by coating the surface of sodium percarbonate as a hydrogen peroxide releasing substance with a specific component, the detergency and the detergency are improved. The present inventors have found that storage stability can be improved without impairing the substrate damage suppressing ability, and the present invention has been completed.

That is, the present invention comprises sodium percarbonate and an alkali metal silicate, wherein the surface of the sodium percarbonate is coated with a surfactant, a polyalkylene glycol or an inorganic metal salt. A cleaning composition characterized by the following.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The sodium percarbonate used in the present invention has a surface coated with a surfactant, a polyalkylene glycol or an inorganic metal salt. In this case, the coating is such that a part or all of the sodium percarbonate powder is coated, but it is preferable that the coating is entirely performed in order to prevent caking.

Examples of the surfactant include a nonionic surfactant, a cationic surfactant, an anionic surfactant and an amphoteric surfactant, and a nonionic surfactant is particularly preferred. As the nonionic surfactant, for example, those having an alkylene oxide group as a hydrophilic group, and having an aliphatic hydrocarbon group or an aralkyl group as a hydrophobic group, wherein the ratio of the hydrophilic group to the hydrophobic group is arbitrary. Can be mentioned. The nonionic surfactant includes an ethylene oxide group, a propylene oxide group or a group containing an ethylene oxide group and a propylene oxide group as a hydrophilic group, and a linear or branched aliphatic carbon having 6 to 18 carbon atoms as a hydrophobic group. One or two selected from those having a hydrogen group
More than one species are preferred.

As the polyalkylene glycol, those having an average molecular weight of 200 to 40,000 can be mentioned, those having an average molecular weight of 300 to 10,000 are preferable, and polyethylene glycol and polypropylene glycol are particularly preferable.

Examples of the inorganic metal salt include one or more selected from sodium carbonate, sodium hydrogen carbonate, potassium carbonate and sodium sulfate.

The weight ratio of sodium percarbonate to surfactant, polyalkylene glycol or inorganic metal salt is preferably from 10: 1 to 1 to increase the storage stability of the composition.
000: 1, particularly preferably 30: 1 to 10
00: 1.

As a method for coating sodium percarbonate with a surfactant, a polyalkylene glycol or an inorganic metal salt, for example, the following method can be applied.

As a method of coating sodium percarbonate with a surfactant, a method of spraying a surfactant onto sodium percarbonate or the like can be applied.

As a method for coating sodium percarbonate with a polyalkylene glycol, a liquid polyalkylene glycol can be coated in the same manner as a surfactant, and a solid polyalkylene glycol can be coated with water or an aromatic polyalkylene glycol. After dissolving in a solvent, coating treatment can be performed in the same manner as for a surfactant.

A method for coating sodium percarbonate with an inorganic metal salt is described in JP-A-58-217599.
Applying the coating method according to the sodium metaborate coating method described in Examples below on page and in Examples below on page 5 of JP-A-59-196399, using the above inorganic metal salt in place of sodium metaborate. Can be coated. The method is as follows. The sodium percarbonate 100g placed in a stirred mixer, while stirring at 250 rpm, metaboric sodium tetrahydrate _{(NaB0 2 · 4H 2 O)} 25% of 5g
An aqueous solution (prepared by heating and melting) is sprayed, stirred for 10 minutes, and then dried with hot air to obtain sodium perborate / tetrahydrate-coated sodium percarbonate.

The content of sodium percarbonate in the detergent composition is preferably from 10 to 95% by weight, particularly preferably from 20 to 85% by weight, in consideration of imparting sufficient detergency and economy. It is.

Examples of the alkali metal silicate used in the present invention include amorphous alkali metal silicates such as sodium silicate and potassium silicate, and crystalline alkali metal silicates. Can be used alone or in combination of two or more.

Examples of such an alkali metal silicate include a crystalline alkali metal silicate represented by the following general formula (I), a crystalline alkali metal silicate represented by the following general formula (II) or a general formula (III) )) Amorphous alkali metal silicates.

[0019] _{x (M 2 O) · y} (SiO 2) · z in _{(Me m O n) · w} (H 2 O) (I) [formula, M represents a Group Ia elements of the periodic table, Me Is IIa, IIb, IIIa, IVa of the Periodic Table selected from Group VIII elements
Indicates a species or a combination of two or more species, y / x = 0.5
2.6, z / x = 0.01-1.0, n / m = 0.5-
2.0, w = 0 to 20].

In the general formula (I), M is I in the periodic table.
It is selected from group a elements, and includes Na, K and the like. These may be used alone or, for example, a mixture of Na ₂ O and K ₂ O to constitute the M ₂ O component.

In the general formula (I), Me is in the periodic table.
Group IIa, IIb, IIIa, IVa or
Selected from Group VIII elements, for example, Mg, Ca, Zn, Y,
Examples include Ti, Zr, and Fe. These are not particularly limited, but are preferably Mg and Ca from the viewpoint of resources and safety. These may be used alone or in combination of two or more.
O, CaO or the like may constitute the Me _m O _n component are mixed.

In the general formula (I), y / x is used to prevent the alkali ability from being insufficient to be insufficient as an alkali agent, and the ion exchange capacity from being too low to be insufficient as an ion exchanger. It is preferably 0.5 to 2.6, particularly preferably 1.5 to 2.2, in order to prevent the solubility from becoming insufficient and causing a significant adverse effect on the caking properties, the solubility, and the physical properties of the powder of the composition. It is. Further, in the general formula (I), z / x has a low on-exchange capacity,
In order to prevent insufficiency as an ion exchanger and prevent insufficiency in water resistance, it is preferable that the amount of the ion exchanger be 0.1.
01 to 1.0, and particularly preferably 0.02 to 0.9.
It is. Further, the alkali metal silicate of the general formula (I) may be a hydrate, in which case w = 1 to 20.

X, y, and z are not particularly limited as long as they have the relationship shown in the y / x ratio and the z / x ratio described above. As described above, x (M ₂ O) is, for example, x ′ (Na ₂ O) · x ″ (K
If the ₂ O), x is the x '+ x ". This relationship is the same in the z in the case where z (Me _m O _n) component consists of two or more. Further, n / m indicates the number of oxygen ions coordinated to the element, and is substantially 0.5,
It is selected from the values of 1.0, 1.5, and 2.0.

The crystalline alkali metal silicates of the general formula (I), M ₂ O, but is made of three components of SiO ₂ and Me _m O _n, is particularly limited, a raw material of each of these components Instead, known compounds can be used. For example, raw materials for the M ₂ O component include NaOH, K
OH, Na ₂ CO ₃ , K ₂ CO ₃ , Na ₂ SO _{4 and the} like. Examples of the raw material of the SiO ₂ component include silica stone, kaolin, talc, fused silica, sodium silicate and the like. , Me _m O _n the components of the raw materials, CaCO _3,
MgCO ₃ , Ca (OH) ₂ , Mg (OH) ₂ , MgO,
ZrO ₂ , dolomite and the like can be mentioned.

The process for producing the crystalline alkali metal silicate of the general formula (I) is carried out in a predetermined quantitative ratio so that the number x, y and z of the desired crystalline alkali metal silicate is obtained. The raw material components are mixed and usually 300 to 1500 ° C, preferably 500 to 1000 ° C, particularly preferably 600 to 900 ° C.
A method of firing and crystallization in the range of ° C. can be mentioned. When the temperature is within the above range, water resistance is imparted by sufficient crystallization, and sufficient ion exchange ability can be imparted while maintaining an appropriate particle size. In addition, the heating time in the said temperature range is 0.1 to 24 hours normally. Such firing is performed using an electric furnace, a gas furnace, or the like.

The particle size of the crystalline alkali metal silicate of the general formula (I) is not particularly limited, but is preferably in the range of 0.01 to 100 μm.

M ₂ O · y ′ (SiO ₂ ) · w ′ (H ₂ O) (II) [wherein M represents an alkali metal, and y ′ = 1.5 to 4.
0, w '= 0 to 20].

In the general formula (II), M represents the general formula (I)
Has the same meaning as y ′ and w ′ are such that y ′ is 1.7 to
It is preferred that w and w ′ be 2.2. Further, those having an ion exchange capacity of 100 to 400 mg CaCO ₃ / g are preferred.

The crystalline alkali metal silicate of the general formula (II) is generally prepared by converting amorphous glassy sodium silicate to 20%.
It is obtained by firing at 0 to 1000 ° C. to make it crystalline. For details of the synthesis method, for example, Phys.Chem.Glasses.
7, p127-p138 (1966), Z. Kristallogr., 129, p 396-p404
(1969). The crystalline alkali metal silicate of the general formula (V) may be in the form of powder or granules, for example, from Hoechst under the trade name “Na-SKS-6” (δ-Na ₂ Si ₂ O ₅ ). Is available.

The particle size of the crystalline alkali metal silicate of the general formula (II) is not particularly limited, but is preferably in the range of 0.01 to 100 μm.

X (M ₂ O) · y (SiO ₂ ) (III) [wherein M represents an element of Group Ia of the periodic table, and y / x = 0.5
~ 3.5].

In the general formula (III), M, x and y have the same meaning as in the general formula (I). In the general formula (III), y / x prevents the alkalinity from becoming insufficient to be insufficient as an alkali agent, and the ion exchange capacity from being too low to be insufficient as an ion exchanger, and the water resistance is poor. The amount is preferably 1.5 to 3.0 in order to prevent sufficient adverse effects on the caking properties, solubility, and powder properties of the composition. As the amorphous alkali metal silicate represented by the general formula (III), sodium silicate 1
No. 2, sodium silicate No. 2, sodium silicate No. 3, and the like.

The content of the alkali metal silicate in the detergent composition is preferably 0.1 to 30% by weight in consideration of not damaging the substrate and economical efficiency.
Particularly preferably, it is 1 to 15% by weight.

The mixing ratio of sodium percarbonate and alkali metal silicate is preferably from 100: 1 to 1: 2 in order to impart an effect of suppressing damage to the base material and to enhance stability during storage. Preferably it is 30: 1 to 1: 1.

The detergent composition of the present invention may further contain a bleach activator. Although the bleach activator is not particularly limited, for example, the following general formula
N, N, N'-tetraacetylated compound represented by (IV) and general formula (V), (VI), (VII) or (VIII) can be mentioned ester compounds, Can be compounded alone or in combination of two or more.

[0036]

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[In the formula, a represents 0 or an integer of 1 to 6]

[0038]

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Wherein R ¹ is a hydrogen atom, having 1 to 10 carbon atoms.
R ² represents a linear or branched alkylene group having 1 to 8 carbon atoms or a linear or branched alkyl group having 1 to 5 carbon atoms; R ³ represents a linear or branched alkylene group having 1 to 8 carbon atoms; R ⁴ represents a linear or branched alkylene group having 1 to 5 carbon atoms; A represents an alkylene group; p represents 0 or 1; A represents a linear or branched alkylene group having 2 to 4 carbon atoms;
Represents an average number of added moles of alkylene oxide of 1 to 1
Is a number of 00, and when q is 2 or more, A may be the same or different; M ¹ represents an alkali metal atom, an alkaline earth metal atom, ammonium, an alkyl ammonium or an alkanol ammonium]

[0040]

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Wherein R ¹ , R ² , R ⁴ , p, A and q are
It has the same meaning as in the general formula (V), and M ² represents a hydrogen atom, an alkali metal atom, an alkaline earth metal atom, ammonium,
Shows alkyl ammonium or alkanol ammonium]

[0042]

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[Wherein, R ⁵ represents a straight-chain alkyl group having 6 to 13 carbon atoms, and M ³ represents a hydrogen atom or an alkali metal atom].

The blending amount of the bleach activator is preferably from 1 to 100% by weight, particularly preferably from 2 to 80% by weight, more preferably from 3 to 80% by weight, based on sodium percarbonate.
３０30% by weight.

The detergent composition of the present invention may further contain a surfactant. Examples of the surfactant include alkyl glycosides, polyoxyethylene alkyl ethers, sorbitan fatty acid esters, polyoxyethylene sorbitan fatty acid esters, polyoxyethylene fatty acid esters, oxyethylene oxypropylene block polymers (Pluronic, trade name, manufactured by BASF), fatty acid monoglycerides Nonionic surfactants such as amines and amine oxides; anionic surfactants such as soaps, alkyl sulfates, alkyl benzene sulfonates, polyoxyethylene alkyl ether sulfates, sulfosuccinic acid diester salts, etc .; Cationic surfactants such as ethylene adducts and mono- or di-long-chain alkyl quaternary ammonium salts; amphoteric surfactants such as carbobetaine, sulfobetaine and hydroxysulfobetaine It can be mentioned, which can be formulated alone or in combination of two or more. Of these, anionic surfactants such as alkyl sulfates, alkyl benzene sulfonates, polyoxyethylene alkyl ether sulfates, and soaps are preferred because of their excellent detergency. The amount of the surfactant is preferably 0.01 to 30% by weight, particularly preferably 0.1 to 30% by weight in the denture cleaning composition.
1 to 20% by weight, more preferably 1 to 5% by weight
It is.

The detergent composition of the present invention may further contain a buffer for adjusting the pH. Examples of the buffer include hydroxides of alkali metals such as sodium hydroxide and potassium hydroxide, amine derivatives such as ammonium hydroxide, mono-, di- or triethanolamine, carbonates of alkali metals such as sodium carbonate and potassium carbonate, and carbonates. Examples thereof include carbonates such as ammonium, silicates of alkali metals such as sodium silicate and potassium silicate, and silicates such as ammonium silicate. In addition to these, sodium sulfate, potassium sulfate And alkali metal sulfates such as lithium sulfate, ammonium sulfate, sodium bicarbonate, potassium bicarbonate, and lithium bicarbonate. The amount of these buffers varies depending on the pH to be adjusted, but is preferably 0.01 to 30% by weight in the detergent composition.

The detergent composition of the present invention may further contain a chelating agent. In general, it is known that an oxygen-based cleaning agent is self-decomposed by a trace amount of metal. By adding a chelating agent, it is possible to prevent a decrease in cleaning performance and improve storage stability. Examples of the chelating agent include alkali metal salts such as tripolyphosphoric acid, pyrophosphoric acid, orthophosphoric acid, and hexametaphosphoric acid, ethylenediaminetetraacetic acid (EDTA), hydroxyiminodiacetic acid,
Dihydroxyethylglycine, nitrilotriacetic acid, hydroxyethylenediaminetriacetic acid, diethylenetriamine 5
Acetic acid, triethylenetetramine hexaacetic acid and alkali metal salts thereof, aminotrimethylenephosphonic acid, 1-hydroxyethylidene-1,1-diphosphonic acid, ethylenediaminetetramethylenephosphonic acid, diethylenetriaminepenta-methylenephosphonic acid, aminotrimethylenephosphonic acid N-oxide, poly α-hydroxyacrylic acid and alkali metal salts thereof, and the like,
These can be used alone or in combination of two or more. The compounding amount of the chelating agent is preferably 0.0001 to 10% by weight, particularly preferably 0.001 to 3% by weight in the detergent composition.

The cleaning composition of the present invention may further contain an enzyme. As enzymes, proteases,
Amylase, lipase, isoamylase, pullulanase, oxidase, peroxidase and the like can be mentioned, and these can be used alone or in combination of two or more.

The detergent composition of the present invention may further comprise a solubilizing agent such as sodium p-toluenesulfonate, sodium xylenesulfonate, sodium alkenylsuccinate, urea, a bactericide, various chemicals, Oxide stabilizers, penetrants, clay and other suspending agents, abrasives, pigments,
Dyes, fragrances and the like can be blended.

In the cleaning composition of the present invention, the pH of the aqueous solution is preferably from 3 to 13, and particularly preferably from 6 to 12.

The detergent composition of the present invention is preferably filled in a container having a moisture permeability of 3% or less as determined from a moisture permeability evaluation test under predetermined conditions. This moisture permeability evaluation test is as follows. (Evaluation test for moisture permeability) 100 g of calcium chloride was placed in a container, sealed, and stored for one week at a temperature of 40 ° C. and a relative humidity of 80%. The following formula: moisture permeability (%) = (W ₂ −W ₁₎ ) × 1
00 / W ₁ [where W ₁ is the initial weight of calcium chloride (1
200 g) indicates, W ₂ is determined from] indicating the weight after 1 week of calcium chloride.

The form of the container to be filled with the cleaning composition of the present invention is not particularly limited, and a bottle, a pouch, a carton box or the like which is usually used can be used.

The detergent composition of the present invention can be applied to various uses, for example, a detergent for clothing, a bleach for clothing, a detergent for hard body, a bleach for hard body,
It can be used as a denture cleaning agent and a cleaning agent for a fully automatic washing machine washing tub. Here, the term “hard body” means a body that has a certain shape, regardless of whether it is planar or three-dimensional. The extent is not limited. This hard body includes plastic, rubber, metal, tile,
In addition to fixed objects such as floors, stairs, walls, etc. made of brick, concrete, cement, glass, wood, etc., there can also be mentioned various instruments, tools, tools, furniture, tableware, etc. made of them in general that come into contact with humans. . Therefore, the detergent composition of the present invention is used as a detergent for hard bodies, as a detergent for floors, a bleach for dishes, a bleach for kitchens, a kitchen detergent, a bathroom detergent, a bathroom mold remover. , Cleaning agent for fully automatic washing machine washing tub,
The present invention can be applied to a cleaning agent for a drain pipe, a cleaning agent for small articles in a kitchen or a washroom, and the like.

[0054]

EXAMPLES The present invention will be described in more detail with reference to the following Examples, but it should not be construed that the invention is limited thereto.

Test Example 1 (Evaluation Test for Moisture Permeability) Using various containers for general cleaning agents, their moisture permeability was measured. Each container was filled with 100 g of calcium chloride (manufactured by Katayama Chemical Co., Ltd., for moisture measurement) and sealed. In the case of a bottle, the lid was closed, and in the case of a pouch, heat sealing was performed, and a 0.3 mm slit for venting air was provided. Thereafter, it was stored for one week under conditions of a temperature of 40 ° C. and a relative humidity of 80%. From the measured weight of calcium chloride before and after storage, the following formula: moisture permeability (%) = (W ₂ −W ₁ ) × 100 / W ₁ [wherein
W ₁ represents the initial weight of calcium chloride (100 g);
W ₂ indicates the weight of calcium chloride after one week]. The moisture permeability of each container is as follows. (Type of container) (Moisture permeability) Bottle A 3.7% Bottle B 2.3% Bottle C 1.2% Pouch A 4.2% Pouch B 1.3% Carton A 4.5%.

Examples 1 to 12 and Comparative Examples 1 to 4 Using the components shown in Table 1 and below, detergent compositions were produced. When surfactants A and B, sodium carbonate, and potassium carbonate are used as coating components, each coating component is converted into an aqueous solution of about 20 to 40% by weight, which is sprayed on sodium percarbonate and sprayed. Coated by heat drying. When PEG600 was used as the coating component, the coating was performed by dripping and mixing a theoretical amount of PEG600, which was heated to a liquid state, on the sodium percarbonate particles and then drying. When PEG 6000 was used as a coating component, the coating was performed by mixing sodium percarbonate and a theoretical amount of flake PEG 6000, stirring while applying heat, and then drying. Surfactant _{A: C 12 H 25 O (} CH 2 CH 2 O) 8 H Surfactant _{B: C 12 H 25 O (} CH 2 CH 2 O) 6 CH 2 CH
₂ OH PEG600 :( polyethylene glycol molecular weight 600) PEG6000: Product Name (polyethylene glycol molecular weight 6
000) Alkali sodium silicate A: In the general formula (I), M = N
_{a; Me m O n = CaO} ; y / x = 1.5; z / x = 0.
2; w = 0 sodium alkali silicate B: in the general formula (I), M = N
a, K (K / Na = 0.03); Me m O n = CaO, Mg
O; (Mg / Ca = 0.01); y / x = 1.8; z / x
= 0.02; w = 0 Alkali sodium silicate C: Powdered sodium silicate No. 2 (manufactured by Nippon Chemical Co., Ltd.) Bleaching activator A:

[0057]

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AS: sodium lauryl sulfate (manufactured by Wako Pure Chemical Industries, Ltd.) AES: C ₁₂ H ₂₅ O (CH ₂ CH ₂ O) ₄ SO ₃ H Diquest 2015 DN: chelating agent (manufactured by Nippon Monsanto) After filling each detergent composition into a bottle C, closing the lid and sealing, the mixture was heated at a temperature of 40 ° C. and a relative humidity of 80%.
After storage for 1 month or 2 months, the storage stability (caking properties) was evaluated according to the following criteria. Table 1 shows the results. The numerical value of each component in Table 1 is represented by% by weight. ◎: Completely smooth ○: Partly solidified △: Overall solidified, but broken by shaking the container ×: Completely solidified, not broken by shaking the container

[0059]

[Table 1]

After completion of the storage stability test, Examples 1 to 12
When the aluminum plate to which the deteriorated grease and dirt adhered was washed with the cleaning composition of Example 1, the aluminum plate exhibited high detergency, and the aluminum plate after cleaning was not particularly damaged.

Examples 13 to 16 and Comparative Examples 5 to 8 Detergent compositions having the compositions shown in Table 2 were prepared and
Was filled in the container shown in FIG. These compositions were tested for storage stability in the same manner as in Examples 1 to 12. Table 2 shows the results. The numerical value of each component in Table 2 is represented by% by weight.

[0062]

[Table 2]

Even when bottles A and pouches A having a water vapor transmission rate exceeding 3% were filled, the cleaning compositions of Examples 13 to 16 exhibited excellent storage stability. Therefore, the detergent composition of the present invention has sufficient storage stability for practical use, and the storage stability can be further enhanced by filling the composition in a container having a moisture permeability of 3% or less. It was confirmed that. After the storage stability test was completed, Examples 13-16
When the aluminum plate to which the deteriorated grease and dirt adhered was washed with the cleaning composition of Example 1, the aluminum plate exhibited high detergency, and the aluminum plate after cleaning was not particularly damaged.

[0064]

The cleaning composition of the present invention has excellent detergency, suppresses substrate damage, and has excellent storage stability.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code FI C11D 3:39 3:08 3:37)

Claims (11)

[Claims] 1. A composition comprising sodium percarbonate and an alkali metal silicate, wherein the surface of the sodium percarbonate is coated with a surfactant, a polyalkylene glycol or an inorganic metal salt. Cleaning composition. 2. The weight ratio of sodium percarbonate to a surfactant, a polyalkylene glycol or an inorganic metal salt is 1
The cleaning composition according to claim 1, wherein the ratio is from 0: 1 to 10,000: 1. 3. The cleaning composition according to claim 1, wherein the surfactant is a nonionic surfactant. 4. The nonionic surfactant has an ethylene oxide group, a propylene oxide group or a group containing an ethylene oxide group and a propylene oxide group as a hydrophilic group, and has a straight or branched chain having 6 to 18 carbon atoms as a hydrophobic group. The cleaning composition according to claim 3, which is at least one member selected from those having an aliphatic hydrocarbon group. 5. The cleaning composition according to claim 1, wherein the polyalkylene glycol is polyethylene glycol or polypropylene glycol. 6. The cleaning composition according to claim 1, wherein the inorganic metal salt is at least one selected from sodium carbonate, sodium hydrogen carbonate, potassium carbonate and sodium sulfate. 7. alkali metal silicate has the following general formula _{(I): x (M 2} O) · y (SiO 2) · z (Me m O n) · w (H 2 O) (I) [Wherein, M is an element of Group Ia of the periodic table, Me is IIa, II
at least one element selected from the group consisting of b, IIIa, IVa and VIII, y / x = 0.5 to 2.6, z / x = 0.01 to
1.0, n / m = 0.5 to 2.0, w = 0 to 20].
The cleaning composition according to the above. 8. An alkali metal silicate represented by the following general formula (II): M ₂ O.y '(SiO ₂ ) .w' (H ₂ O) (II) wherein M is a periodic table Group Ia, and y ′ = 1.
5 to 4.0, and w ′ = 0 to 20]. 9. An alkali metal silicate represented by the following general formula (III): x (M ₂ O) · y (SiO ₂ ) (III) wherein M is an element of Group Ia of the periodic table. , Y / x =
0.5 to 3.5].
9. The cleaning composition according to any one of items 1 to 8. 10. The cleaning composition according to claim 1, wherein the content ratio of sodium percarbonate to alkali metal silicate is 100: 1 to 1: 2 by weight. 11. A cleaning method characterized in that the cleaning composition according to any one of claims 1 to 10 is filled in a container having a moisture permeability of 3% or less, as determined from the following moisture permeability evaluation test. Composition. (Evaluation test for moisture permeability) 100 g of calcium chloride was placed in a container, sealed, and stored for one week at a temperature of 40 ° C. and a relative humidity of 80%. The following formula: moisture permeability (%) = (W ₂ −W ₁₎ ) × 1
00 / W ₁ [where W ₁ is the initial weight of calcium chloride (1
200 g) indicates, W ₂ is determined from] indicating the weight after 1 week of calcium chloride.