JPH0711296A - Defatting detergent composition for metal-plastic - Google Patents

Abstract

PURPOSE:To obtain the subject composition maintaining high defatting and cleaning properties and stamina properties, attaining low COD, etc., by replacing a conventional builder with the composition, comprising a crystalline silicate having a prescribed composition or its hydrate and a surfactant as essential components. CONSTITUTION:The objective composition comprises (A) crystalline silicate in which the composition of anhydride is shown by the formula (M is Na and/or K; M' is Ca and/or Mg; y/x is 0.5-4; z/x is 0-1) and/or its hydrate and (B) a surfactant (e.g. polyoxylethylene alkyl ether or higher alcohol sodium sulfate) as essential components in the ratio of 20-95wt.% of the component A and 1-30wt.% of the component B. The component A, for example, is obtained by mixing sodium silicate No.2 with sodium hydroxide and pulverized calcium carbonate anhydride, burning the mixture in air at 700 deg.C for one hour and grinding the burnt material.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a degreasing detergent composition for industrial metals and plastics materials. More specifically, the present invention relates to a degreasing detergent composition that effectively removes dirt components adhering to the surfaces of metals and plastics materials during alkaline cleaning.

[0002]

2. Description of the Related Art Conventionally, various methods such as solvent cleaning, alkali cleaning and acid cleaning have been used for degreasing and cleaning metals and plastics materials. Among them, the alkaline type cleaning agent has a property of neutralizing acid, saponification of fats and oils, and having electric conductivity, and has a property of washing strong stains such as animal and vegetable fats, mineral oils, waxes, greases, proteins and carbon. It is used as a useful agent industrially. In addition, the industrial fields used are metals, metal-plastics,
It is a degreasing cleaning field for glass and the like, and is widely used in the field. Degreasing and cleaning of the surface of metal or plastics material, which is the object of the present invention, is indispensable as a pretreatment for plating, painting, etc., and its quality is an important factor that governs the success or failure of plating, painting, etc. ing. As a detergent composition for metals and plastics materials, those consisting of various builders such as alkaline agents and surfactants are the mainstream, and free fatty acids and acidic components in the stain are saponified and other than the stain While improving the dispersibility of the
It is desirable that the liquid can be used stably without deterioration for a long period of time. Further, as a cleaning method, there are dipping cleaning, spray cleaning, electrolytic cleaning, brush cleaning, and the like, or a combination thereof, and cleaning treatment is performed using these methods.

However, the conventional alkaline degreasing detergents still have various problems and are not sufficiently satisfactory. In particular, cleaning due to deterioration of surfactant performance due to alkaline earth metal ions such as calcium ions and magnesium ions, which are hard water components that are mixed and accumulated in industrial water and / or soil components, and adsorption of soil components and deterioration of soil. There is a strong demand for improvements such as deterioration of the cleaning property and deterioration of the stamina of the cleaning liquid. Particularly in recent years, phosphates, which are effective for improving the above problems, have a problem of eutrophication in rivers and lakes, and legal regulations are becoming stronger. Organic chelating agents such as NTA and EDTA Is CO
It is particularly desired to improve the method so that it is not used as much as possible because of the high D and the fear of adverse ecological effects.

To meet such demands, for example, Japanese Patent Publication No. 62-53600, Japanese Patent Application Laid-Open No. 2-110197 and Japanese Patent Publication No. 4-50393 disclose specific surfactants, organic acid salts and water-soluble compounds. A technique is disclosed in which a polymer is used to satisfy the above requirements by adding and blending the polymer into a conventional detergent composition. However, it is difficult to say that the above-mentioned conventional techniques can sufficiently improve the performance of the surfactant and the stamina, etc. while satisfying the effects on the environment, reduction of the wastewater treatment property, and the like. However, the development of a degreasing detergent composition having the above various properties improved has been awaited. Alkali metal silicates in silicates are mainly used as an inorganic builder as an alkaline agent for the purpose of increasing the pH value of a degreasing cleaning solution (Surfactant Handbook, Nishi-Imai-Kasa, No. 624).
Page, 1960, Industrial Books). Further, in the above-mentioned patent publication relating to the use of the alkali metal silicate in the degreasing detergent composition used industrially, there are many descriptions about the use of the alkali metal silicate as a water-soluble alkali agent, No mention is made of the description of crystalline alkali metal silicate having excellent water resistance and also having ion exchange ability.

[0005]

Means for Solving the Problems The inventors of the present invention have made extensive studies as to a degreasing detergent composition for metal / plastics which can satisfy the above technical background and the above-mentioned demands. It was found that the crystalline silicate compound having a composition has a high alkaline ability and a cation exchange ability, and by incorporating the crystalline silicate and / or its hydrate and a surfactant as an essential component, It has been found that it is possible to provide a degreasing detergent composition which has achieved the object, and has completed the present invention.

That is, the gist of the present invention is xM ₂ O.ySiO ₂ .zM 'O (wherein M represents Na and / or K, M'represents Ca and / or Mg) as a general formula of the anhydride. , Y / x = 0.5 to 4.0, z / x =
It is 0 to 1.0. ) Crystalline silicate and /
Alternatively, the present invention relates to a degreasing detergent composition for metal / plastics, which contains a hydrate thereof and a surfactant as essential components.

The crystalline silicate in the present invention has an anhydrous composition represented by the general formula xM ₂ O.ySiO ₂ .zM'O. Here, M represents Na and / or K, and M ′ represents C
a and / or Mg is shown. Further, y / x is 0.5 to 4.
It is 0, preferably 0.5 to 1.9, and more preferably 1.0 to 1.9. If y / x is less than 0.5, the water resistance is insufficient, and if it exceeds 4.0, the ion exchange capacity is low and it is not suitable for use as a degreasing detergent composition for metals and plastics. z / x is 0 to 1.0, preferably 0.005 to 1.0, and more preferably 0.01 to 0.6. When z / x exceeds 1.0, the ion exchange capacity is low and it is not suitable for use as a degreasing detergent composition for metals and plastics. x, y, and z are not particularly limited as long as they have the relationship shown in the above y / x and z / x. From the viewpoint of increasing the cation exchange rate, K / Na is usually 0 to 8.0, preferably 0.01 to 8.0. From the viewpoint of increasing the cation exchange capacity, Mg / Ca is usually 0 to 10, preferably 0.02 to 10.

As the crystalline silicate in the present invention, there are various modes, but preferable examples are as follows. In the above general formula, y /
x = 0.5 to 1.9, z / x = 0.005 to 1.0, M
K / Na in ₂ O = 0.01 to 8.0, Mg in M'O
/ Ca = 0 to 10, the cation exchange capacity is 20
0-600 CaCO ₃ mg / g crystalline silicate

The crystalline silicate in the present invention may be a hydrate, and the hydration amount in this case is usually 0 to 20 mol% in terms of the molar amount of H ₂ O.

The crystalline silicate in the present invention is obtained by synthesis and is composed of three components of M ₂ O, SiO ₂ and M'O as shown in the above general formula. Therefore, in order to produce the crystalline silicate in the present invention, a substance corresponding to each component is required as a raw material thereof, but in the present invention, a known compound is appropriately used without particular limitation. For example, as the M ₂ O component and M ′ O component, single or complex oxides, hydroxides, salts of the respective relevant elements, and the element-containing minerals are used. Specifically, for example, as the raw material of the M ₂ O component, NaOH, K
OH, Na ₂ CO ₃ , K ₂ CO ₃ , Na ₂ SO ₄ etc.
As the raw material for the M ′ O component, CaCO ₃ , Ca (OH)
₂ , MgCO ₃ , Mg (OH) ₂ , MgO, dolomite and the like. As the SiO ₂ component, silica stone, silica sand, cristobalite stone, kaolin, talc, fused silica, sodium silicate and the like are used.

In the present invention, these raw material components are mixed in a predetermined quantitative ratio so as to obtain the desired crystalline silicate x, y, z, and are usually 300 to 1300 ° C., preferably 5
00-1000 ° C, more preferably 600-900 ° C
Examples of the method include calcination in the range of 1 to crystallize, similarly mixing, and then once melting at 1100 ° C to 1600 ° C to obtain a vitrified product, and then calcining, and further melting and water-vitalizing and calcining. . The heating time is usually 0.1 to 24 hours. Such firing can be usually performed in a heating furnace such as an electric furnace or a gas furnace. Further, after firing, the powder is crushed as necessary to have a predetermined particle size. As the crusher, for example, a ball mill, a roller mill or the like is used. By such a manufacturing method, the crystalline silicate according to the present invention having the above-mentioned structural characteristics can be obtained.

The hydrate of the crystalline silicate according to the present invention can be easily prepared by a known method and is not particularly limited. For example, there may be mentioned a method in which the anhydrous crystalline silicate obtained as described above is suspended in ion-exchanged water to be hydrated, and dried to be powdered.

The crystalline silicate or hydrate thereof according to the present invention thus obtained has the same cation exchange capacity as the cation exchange capacity from the viewpoint that it is required to have characteristics equal to or higher than those of generally used organic chelating agents. At least 2
00CaCO ₃ mg / g or more, preferably 200 to 60
It has 0 CaCO ₃ mg / g. In the present invention, the cation exchange capacity refers to the value of cation exchange capacity obtained by the measuring method described below shown in Examples. However, 5
In the case of 00CaCO ₃ mg / g or more, it is a value measured with the amount of the calcium chloride solution being 200 ml.

The water resistance in the present invention means the stability of the crystalline silicate in water. Therefore, inferior water resistance means that the crystalline silicate has poor stability in water and S in water.
i means that the elution amount is increased. On the other hand, “excellent in water resistance” means that the crystalline silicate has high stability in water and the amount of Si eluted in water is very small. In the crystalline silicate of the present invention, the amount of Si eluted into water is Si
It is usually 120 mg / g or less, preferably 90 mg / g or less, more preferably 60 mg / g or less in terms of O ₂ , and most of them are substantially insoluble in water. In the present invention, “substantially insoluble in water” means that 2 g of a sample is added to 100 g of ion-exchanged water and the amount of Si eluted when the mixture is stirred at 25 ° C. for 30 minutes is usually 120 m in terms of SiO _2.
Less than g / g.

The crystalline silicate used in the present invention is widely used as a degreasing detergent composition for metals and plastics, and has an excellent ability to trap cations such as Ca and Mg, an ability to adjust alkalinity, and a pH buffering effect. Express. As a result, the alkaline degreasing detergent containing the crystalline silicate used in the present invention has excellent degreasing and washing performance. The blending amount of the crystalline silicate used in the degreasing detergent composition of the present invention is not particularly limited, but is usually 5 to 95% by weight, preferably 20 to 85% by weight in the composition. If it is less than 5% by weight, sufficient degreasing and cleaning performance is not exhibited, and if it exceeds 95% by weight, the amount of the surfactant and other additives blended becomes small, resulting in poor emulsification and dispersibility.

As the surfactant used in the present invention, nonionic surfactants, anionic surfactants,
It may be either a cationic surfactant or an amphoteric surfactant, and examples thereof include the following.

(1) For example, polyoxyethylene alkyl ether, polyoxyethylene alkylaryl ether, polyoxyethylene alkylamino ether, sorbitan fatty acid ester, polyoxyethylene sorbitan fatty acid ester, polyoxyethylene fatty acid ester, glycerin fatty acid mono-, Nonionic surfactants such as di-esters (2) For example, higher alcohol sodium sulfate, lauryl sulfate triethanolamine, ammonium lauryl sulfate, sodium dodecylbenzene sulfonate, sodium alkylnaphthalene sulfonate, dialkyl sulfosuccinate, polyoxyethylene Sodium alkyl ether sulfate, polyoxyethylene alkyl ether sulfate triethanolamine,
Anionic surfactants such as sodium polyoxyethylene alkylphenyl ether sulfate and sodium salt of β-naphthalene sulfonic acid formalin condensate, (3) Cations such as alkylamine acetate, alkylamine hydrochloride and quaternary ammonium salt Type surfactant,
(4) Examples thereof include amphoteric surfactants such as alkyldimethylamine oxide and alkylcarboxymethyl hydroxyethyl imidazolium betaine. Of this,
The nonionic surfactant of (1) has the following general formula: R ₁ —O— (CH ₂ CH ₂ O) _n — (CH ₂ CH ₂ CH).
₂ O) _m H (in the formula, R ₁ is H, a straight-chain aliphatic hydrocarbon group having 1 to 18 carbon atoms, a branched chain aliphatic hydrocarbon group having 1 to 12 carbon atoms or an alkyl group having 1 to 12 carbon atoms). 12 alkylphenyl groups, n is 0 to 60, m is 0 to 60, and n + m is a number larger than 1.) are preferred.

Specific examples of these include polyoxyethylene hexyl ether, polyoxyethylene octyl ether, polyoxyethylene decyl ether,
Polyoxyethylene lauryl ether, polyoxyethylene palmityl ether, polyoxyethylene myristyl ether, polyoxyethylene stearyl ether,
Polyoxyethylene oleyl ether, polyoxyethylene tolyl ether, polyoxyethylene xylenyl ether, polyoxyethylene octyl phenyl ether, polyoxyethylene nonyl phenyl ether, polyoxyethylene decyl phenyl ether, polyoxyethylene dodecyl phenyl ether, polyoxypropylene , Polyoxyethylene polyoxypropylene copolymer, polyoxyethylene polyoxypropylene octyl phenyl ether, polyoxyethylene polyoxypropylene nonyl phenyl ether, polyoxyethylene polyoxypropylene decyl phenyl ether, polyoxyethylene polyoxypropylene dodecyl phenyl ether, poly Oxypropylene octyl phenyl ether, polyoxypropy Emissions nonylphenyl ether, polyoxypropylene decyl ether, polyoxypropylene dodecyl ether, polyoxypropylene butyl ether, and the like.

The blending amount of the above-mentioned surfactant component in the degreasing detergent composition is not particularly limited, but is usually 0.1-0.1%.
It is 50% by weight, preferably 1 to 30% by weight.
Further, the degreasing detergent composition of the present invention has a remarkable effect only by containing the above-mentioned crystalline silicate and a surfactant, but further contains an inorganic builder or an organic builder, or uses them in combination. Can produce a synergistic effect. Inorganic builders and organic builders that can be used in the present invention are exemplified below.

Inorganic builders; strong alkali agents such as sodium hydroxide, potassium hydroxide, lithium hydroxide; sulfuric acid,
Alkali metal salts of inorganic acids such as hydrochloric acid, nitric acid, phosphoric acid, tripolyphosphoric acid, boric acid, silicic acid; ammonium salts, lower amine salts, etc .; sodium carbonate, potassium carbonate, etc. are used. These are usually 5 to 90 relative to the degreasing detergent composition.
Used by adding about% by weight.

Organic builders; aminocarboxylic acids such as glycine, nitrilotriacetic acid (NTA), ethylenediaminetetraacetic acid (EDTA) and diethylenetriaminepentaacetic acid (DTPA); citric acid, malic acid, tartaric acid, gluconic acid,
Alkali metal salts, ammonium salts, lower amine salts and the like of oxycarboxylic acids such as mucus acid are used. These are usually used by adding about 0.5 to 15% by weight to the degreasing detergent composition. These inorganic builders and organic builders may be used alone or in combination of two or more, depending on the type of metal or plastics material, the type of stain component, etc.

[0022]

EXAMPLES The present invention will be described in more detail with reference to Examples, Comparative Examples and Test Examples, but the present invention is not limited to these Examples and the like. The measured values in the examples and comparative examples were measured by the following method.

(1) Cation exchange capacity 0.1 g of a sample was precisely weighed and added to 100 ml of an aqueous solution of calcium chloride (concentration: 500 ppm as CaCO ₃ ),
After stirring at 25 ° C. for 60 minutes, filtration was performed using a membrane filter having a pore size of 0.2 μm (manufactured by Advantech, nitrocellulose), and the amount of Ca contained in 10 ml of the filtrate was measured by EDTA titration. The calcium ion exchange capacity (cation exchange capacity) of the sample was determined from the value.

(2) Si elution amount 2 g of a sample was added to 100 g of ion-exchanged water and the mixture was mixed at 25 ° C. for 3 hours.
Stir for 0 minutes. After that, centrifugation is performed, and the supernatant is filtered using a membrane filter having a pore size of 0.2 μm. Plasma emission analysis (IP
C), and the amount of eluted Si was calculated in terms of SiO ₂ .

(3) Alkaline Ability 1 g of a sample was precisely weighed, suspended in 1000 ml of ion-exchanged water, and 10 ml of 0.25N hydrochloric acid was added dropwise with stirring, and the pH of the suspension was 9.0 to 12. Those having a pH of 0.0 were judged to have good alkalinity, and when the pH was less than 9.0, they were judged to have insufficient alkalinity.

Example 1 No. 2 sodium silicate (SiO ₂ / Na ₂ O = 2.5) 100
4.2 parts by weight of sodium hydroxide was added to parts by weight, and the mixture was stirred with a homomixer to dissolve the sodium hydroxide. To this, 10 parts by weight of finely ground anhydrous calcium carbonate was added and mixed using a homomixer. An appropriate amount of the mixture was put into a crucible made of nickel, fired at 700 ° C. in air for 1 hour, quenched, and the fired body obtained was pulverized to obtain crystalline silicate powder 1 used in the present invention. The cation exchange capacity of this powder was as high as 251 CaCO ₃ mg / g, and the amount of eluted Si was 21.5 SiO ₂ mg / g, which was excellent in water resistance. In addition, powder X-ray (Cu
The Kα) diffraction pattern was a substance showing a main diffraction peak at d = 3.95 ± 0.1 A and showing a novel crystal structure different from that of the mixture before firing.

Examples 2 to 8 Crystalline silicic acid used in the present invention in the same manner as in Example 1 except that the composition shown in Table 1 was changed by changing the addition amount of anhydrous calcium carbonate. Salt powders 2 to 8 were obtained. The cation exchange capacity and Si elution amount of the obtained powder were measured, and the results are shown in Table 1.
Similar to the crystalline silicate powder 1 used in the present invention, it was excellent in both cation exchange capacity and water resistance. In addition, the powder X-ray (CuKα) diffraction pattern of the obtained fired body shows a main diffraction peak at d = 4.17 to 2.05 A, each of which has a novel crystal structure different from that of the mixture before firing. there were.

Examples 9 to 11 Examples 9 to 11 were carried out except that anhydrous magnesium carbonate was used instead of the anhydrous calcium carbonate in Example 1 or that anhydrous calcium carbonate and anhydrous magnesium carbonate were simultaneously used to obtain the composition shown in Table 2. Crystalline silicate powders 9 to 11 used in the present invention were obtained in the same manner as in Example 1. The cation exchange capacity and Si elution amount of the obtained powder were measured, and the results are shown in Table 2. The results are shown in Table 2. Similar to the crystalline silicate powder 1 used in the present invention, both cation exchange capacity and water resistance were found. It was excellent. The powder X-ray (CuKα) diffraction pattern of the obtained fired body was d = 4.17 to 2.05.
The substance had a main diffraction peak in A and was a substance having a novel crystal structure different from that of the mixture before firing.

Examples 12 to 14 In Example 1, instead of No. 2 sodium silicate, silica stone powder of 325 mesh pass and sodium hydroxide and / or potassium hydroxide were used, and anhydrous calcium carbonate or anhydrous magnesium carbonate was used. Crystalline silicate powders 12 to 14 used in the present invention were obtained in the same manner as in Example 1 except that the compositions shown in Table 2 were used. The cation exchange capacity and Si elution amount of the obtained powder were measured, and the results are shown in Table 2. The results are shown in Table 2. Similar to the crystalline silicate powder 1 used in the present invention, both cation exchange capacity and water resistance were found. It was excellent. In addition, powder X-ray (CuK
The α) diffraction pattern was a substance showing a main diffraction peak at d = 4.17 to 2.05 A and a novel crystal structure different from that of the mixture before firing.

Examples 15 and 16 10 g of the anhydride obtained in Examples 7 and 14 was dispersed in 500 ml of ion-exchanged water for 1 hour and filtered through a 0.2 μm membrane filter, and the residue on the filter was 100%.
By drying at 16 ° C. for 16 hours, crystalline silicate powders 15 and 16 used in the present invention, which are hydrates of those obtained in Examples 7 and 14, respectively, were obtained. The cation exchange capacity and Si elution amount of the obtained powder were measured, and the results are shown in Tables 1 and 2. As with the crystalline silicate powder 1 used in the present invention, the cation exchange capacity and water resistance are the same. Both were excellent in solubility. In addition, powder X-ray (Cu
The Kα) diffraction pattern was a substance showing a main diffraction peak at d = 10.40 to 3.98 A and a novel crystal structure different from that of the mixture before firing.

[0031]

[Table 1]

[0032]

[Table 2]

Comparative Example 1 Sodium silicate 1.9 was added to 100 parts by weight of No. 2 sodium silicate.
Parts by weight were added, and sodium hydroxide was dissolved using a homomixer. Take an appropriate amount of this in a nickel crucible,
It was calcined in air at a temperature of 0 ° C. for 1 hour. After rapid cooling, pulverization was performed to obtain comparative powder 1. The cation exchange capacity of this powder is
It was a low value of 142 CaCO ₃ mg / g. The amount of Si eluted was 3.8 SiO ₂ mg / g.

Comparative Example 2 To 100 parts by weight of sodium silicate No. 2 was added 28 parts by weight of sodium hydroxide, and the sodium hydroxide was dissolved using a homomixer. Take an appropriate amount of this in a crucible made of nickel, 700
It was calcined in air at a temperature of ° C for 1 hour. After rapid cooling, pulverization was performed to obtain comparative powder 2. The cation exchange capacity of this powder is 91
Low CaCO ₃ mg / g, Si elution amount is 171SiO ₂
The water resistance was inferior to mg / g.

Comparative Example 3 No. 2 sodium silicate powder was used as Comparative Powder 3. The cation exchange capacity of this powder was as low as 59 CaCO ₃ mg / g, and the total amount of the powder dissolved in a water glass state was poor in water resistance.

Comparative Example 4 Sodium metasilicate powder was used as Comparative Powder 4. The cation exchange capacity of this powder was 0 CaCO ₃ mg / g, and the powder completely dissolved in a water glass state, resulting in poor water resistance.

[0037]

[Table 3]

Preparation Example of Degreasing Detergent Composition Table 4 shows preparation examples (A to O) of the degreasing detergent composition of the present invention using the crystalline silicate powder obtained in the above examples. Further, using the comparative powder obtained in the comparative example,
Table 5 shows preparation examples (P to Y) of the comparative degreasing detergent composition. As the surfactant, sodium dodecylbenzene sulfonate (a), polyoxyethylene (3.0) alkyl (C ₁₂ -C ₁₆ ) sodium ether sulfate (b),
Polyoxyethylene (8.0) nonylphenyl ether (c) was used. Also, as other inorganic builders,
Commonly used sodium hydroxide (I), sodium tripolyphosphate (II), and nitrilotriacetic acid (III) and ethylenediaminetetraacetic acid (IV) as organic builders were used.

[0039]

[Table 4]

[0040]

[Table 5]

Test Example 1 (Degreasing and cleaning performance test) 0.2 g of a lubricant was uniformly adhered to the surface of a stainless steel pipe degreased with a trichlorethylene solvent, and 60
The test piece was left to incubate at 0 ° C. for 2 hours, and the degreasing detergent compositions shown in Tables 4 and 5 were used for immersion cleaning under the following test conditions. After that, the test piece under running water 3
It was washed with water for 0 seconds and dried with warm air. The residual oil content on the surface of the test piece treated as described above was extracted with a trichloroethylene solvent, the weight of the extracted oil was measured, and the degreasing rate was obtained and evaluated by the following formula. The results are shown in Tables 6 and 7. Degreasing rate (%) = (Adhesion amount before test-Adhesion amount after test) /
Adhesion amount before test × 100 (Test condition) Stainless steel pipe: SUS 304TPD Lubricant: Mineral oil + Synthetic ester Degreasing detergent concentration: 15 ° DH Prepare a 4% by weight liquid of the degreasing detergent composition using hard water, Used for evaluation. Degreasing cleaning liquid temperature: 50 ° C. Cleaning time: 10 minutes Degreasing cleaning liquid stirring: 400 rpm

Test Example 2 (Stamina Performance Test) In the degreasing and cleaning performance test of Test Example 1, the number of pipe treatments was 5
The stamina performance was evaluated from the degreasing rates of the 0th and 100th lines.

Test Example 3 (Wastewater Treatment Performance Test) The same degreasing cleaning liquid before use as the liquid prepared in Test Example 1 was used.
Further, 1000 ml of a 100-fold diluted solution was used as a treatment solution and treated by a flocculation-precipitation method using ferric chloride. [Wastewater treatment method] Add HCl to the 100-fold diluted product,
After adjusting to pH = 5, ferric chloride was added, calcium hydroxide was added, pH was adjusted to 7 and then filtered, and the COD value of the obtained filtrate was measured. COD
It was shown and evaluated as the concentration (ppm). The results are shown in Tables 6 and 7.

[0044]

[Table 6]

[0045]

[Table 7]

As shown in the test results of Tables 6 and 7, the degreasing and cleaning composition of the present invention satisfies all the characteristics such as degreasing and detergency, stamina and wastewater treatment, and has excellent performance. was gotten. On the other hand, as seen in the comparative degreasing detergent composition, it has been found that it is difficult for the conventional composition to obtain the performance which simultaneously satisfies the above-mentioned required characteristics.

[0047]

EFFECTS OF THE INVENTION The degreasing detergent composition for metals and plastics of the present invention maintains the high degreasing and washing performance and stamina which have been difficult with conventional degreasing detergent compositions. Furthermore, by replacing all or part of conventional organic and inorganic builders, it is possible to reduce or use the use of organic compounds, which may cause problems in eutrophication and ecology of rivers and lakes, which have become a problem these days. Low, low COD and good wastewater treatability are achieved.

Claims (6)

[Claims] 1. The general formula of the anhydride is xM ₂ O.ySi.
O ₂ · zM ′ O (In the formula, M represents Na and / or K,
M ′ represents Ca and / or Mg, and y / x = 0.5 to
It is 4.0 and z / x = 0-1.0. ) A degreasing detergent composition for metal / plastics, which comprises a crystalline silicate represented by (4) and / or its hydrate, and a surfactant as essential components. 2. The general formula of claim 1, wherein the crystalline silicate has y / x = 0.5 to 1.9 and z / x = 0.00.
5 to 1.0, K / Na in M ₂ O = 0.01 to 8.0,
The degreasing detergent composition for metal / plastics according to claim 1, which is represented by Mg / Ca in M′O = 0 to 10. 3. The crystalline silicate has a cation exchange capacity of 20.
The degreasing detergent composition for metal / plastics according to claim 1 or 2, which has an amount of 0 to 600 CaCO ₃ mg / g. 4. The amount of crystalline silicate eluted into water is Si.
The degreasing detergent composition for metal / plastics according to claim 1, 2 or 3, which is 120 mg / g or less in terms of O ₂ . 5. The degreasing detergent composition for metal / plastics according to claim 1, wherein the crystalline silicate has an alkaline ability that is a buffering action against an acid. 6. A crystalline silicate and / or a hydrate thereof in an amount of 5 to 95% by weight and a surfactant in an amount of 0.1 to 50% by weight. The degreasing detergent composition for metals and plastics described.