JPS59559B2 - Alkaline cleaning composition - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is an alkaline cleaning agent set suitable for cleaning and removing organic and inorganic dirt and deposits stuck to metal machines, the inner and outer surfaces of containers, the inner walls of boilers, etc.

Regarding products. Detergents made of inorganic alkaline salts such as carbonates and silicates, and higher alcohol-based nonionic surfactants have traditionally been used as detergents in various fields, and detergents containing percarbonate have also recently been used. ing.

However, conventional cleaning agents generally remove simple stains, but are not effective against strong stains.However, among them, those containing percarbonate have a strong effect on strong stains, but strong alkali Note: Due to its oxidizing properties, it corroded metals and caused damage to the objects in which it was used. In addition, anionic and nonionic interfacial agents are generally added to abrasives, polishing sand, etc. to enhance cleaning power, but especially when used for tableware and baths, the biodegradation ratio decreases. Nothing that is fully satisfactory in terms of safety has yet been developed.

On the other hand, conventional metal soaps hardly dissolve in water and only dissolve in special oils.
Therefore, its use is limited to lubricants, stabilizers, waterproofing agents, etc. in non-aqueous substances (oil, synthetic resins, etc.), and most of them are used in powder form or oil solution, and water-soluble It has been considered difficult to use it in cleaning agents. The inventors of the present invention have conducted intensive research to overcome the drawbacks of the conventional detergents mentioned above, especially those containing percarbonate, and have found that by adding a chelating agent in a predetermined proportion, the metal soap can be made water-soluble. A water-soluble alkaline cleaning composition obtained by adding a predetermined amount of sodium percarbonate to the water-soluble alkaline cleaner is a powerful detergent against organic and inorganic dirt stuck to metal machinery, the inner and outer surfaces of containers, and the inner walls of boilers. It has been found that in addition to having a cleaning effect, it does not cause corrosion or wear on metals or objects to be used.

The present invention was made based on the above findings, and contains 30-90% by weight of sodium percarbonate and 0.1-90% by weight of metal soap.
The present invention provides an alkaline cleaning composition characterized in that it contains 20% by weight of a chelating agent and 5 to 60% by weight of a chelating agent.

Further, in the composition of the present invention, the metal soap includes:
General formula (R″COO)
(X is an integer corresponding to the valence number of the metal M) is used.

Such metal sets include saturated carbon atoms with 5 to 21 carbon atoms,
Included are unsaturated, hydroxy, straight chain, branched chain fatty acids and metal salts of naphthenic acids, rosin acids, etc., all of which are conventionally known substances. As the metal in this case, various metals having a valence of 1-V in the periodic table can be used, but from the viewpoint of toxicity, metals with low toxicity such as lithium, calcium, magnesium, etc. are preferable. In addition, the chelating agent used in the present invention includes:
(1) Polybasic carboxylic acids and their salts (2) Oxymonocarboxylic acids and their salts (3) Imido sulfates (4) Polyaminocarboxylic acid salts (6) Amic acids and their salts (7) Polyaminocarboxylic acid salts ( 8) Examples include sulfur-containing carboxylates.

In the present invention, the chelating agent is one that forms a chelate with the metal to make the metal soap water-soluble (machi-solubilization).Therefore, there is no particular restriction on the type of chelating agent as long as it has the ability to form a chelate, and it can interact with the metal soap. It is selected and used as appropriate by the intermediary.

In addition, the solubility of metal soap is determined by the solubility of metals such as Li and Ca.
, Mg, ZnNi, etc. are generally easy to dissolve, but this tendency is not necessarily constant depending on the type of chelating agent. the above(
The polybasic carboxylic acids and their salts mentioned in 1) include chain and cyclic di- to hexabasic acids.

Specific examples include dibasic carboxylic acids such as malonic acid, tartaric acid, malic acid, maleic acid, fumaric acid, oxadipropionic acid, nitrilotonacetic acid, citric acid,
There are tribasic carboxylic acids such as 0-(carboxymethyl)tartaric acid. Further examples include mono- or tetrasodium salts or potassium salts of oxadisuccinic acid, 2,5-dioxa-1,3,4,6-hexanetetracarboxylic acid, and aromatic tetracarboxylic acid such as benzenetetracarboxylic acid. Base-injected carboxylic acid, or alicyclic tetrabasic carboxylic acid such as cyclohexanetetracarboxylic acid, and their alkali metal salts 1,2,3,4,5,6-hexanehexacarboxylic acid, benzenehexacarboxylic acid, 2 ,5
-Dioxa-1,1,3,4,6,6-hexanehexacarboxylic acid, 1,2,3,4,5,6-cyclohexanehexacarboxylic acid and other six base carboxylic acids and their alkali metal salts. I can give it to you. These polybasic carboxylic acids and their salts can be used alone or in combination of two or more. In addition, the oxymonocarboxylic acids and salts thereof in (2) above include gluconic acid, lactic acid, glycolic acid, hydroacrylic acid, β-oxybutyric acid,
and their salts.

As the imido sulfate of (3) above, for example, (NH
4SO3)2NH1 (NaSO3)2NH・2H20 and other imidobis sulfates (medium), (NH4SO3)2N
NH4・H2O, (NaSO3)2NNa-H2O, (
Examples include imidobis sulfates (base notes) such as NaSO3)2 and NNa.12H20.

This imidosulfate has an NH bond in its molecule,
As a new type of builder chemically different from conventional chelate builders, it can be incorporated into various surfactant compositions. In the present invention, this imidosulfate is used to simultaneously dissolve the metal soap in water and simultaneously dissolve the above compounds (1) and (2).
), it is effective as a builder. That is,
The aqueous solution is medium to weakly alkaline, and the trisodium salt has excellent alkaline buffering power and sufficient water solubility, and it also has low toxicity, which is becoming more and more of a demand for builders these days. In terms of points, rapid or chronic infusion, skin irritation, fish poisoning, hemolysis, and concentration are extremely low. This substance can also be easily produced from sulfur and ammonia, and its price is low. Furthermore, the nitrogen content is particularly low in the case of an alkali metal salt, and the sulfur content is high. Furthermore, this salt has the advantage of having a small corrosion resistance against copper, iron, etc. Therefore, this imide sulfate is extremely expensive for practical formulation in the composition of the present invention. Examples of the polyphosphates mentioned in (4) above include sodium, potassium, and lithium salts of pyrophosphoric acid, tripolyphosphoric acid, tetrapolyphosphoric acid, and hexametaphosphoric acid, but in general, sodium pylori7ate, potassium pyrophosphate, and sodium tripolyphosphate are used. ,
Sodium tetrapolyphosphate, sodium hexametaphosphate, etc. are used.

These materials may be used alone or in the form of a mixture.
Examples of the amine (5) include ethylenediamine, diethylenetriamine, triethylenetetramine, tetraethylenebentamine, pentaethylenehexamine, triethanolamine, and monoethanolamine. Examples of the amino acids and their salts in (6) include glycine, taurine, glutamic acid, alanine, phenylalanine, and salts thereof.

Furthermore, examples of the polyaminocarboxylic acid and its salt in (7) include nitrilotriacetic acid, 1,2-diaminocyclohexanetetraacetic acid, ethylene glycol bis(β-aminoethyl ether)tetraacetic acid, ethylenediaminetetraacetic acid,
Examples of the sulfur-containing carboxylic acid and salts thereof (8) include xanthic acid and salts thereof. In the composition of the present invention, when blending with percarbonate, the metal soap and chelating agent are preferably solid (powder or granular) with low moisture absorption.

Therefore, it is preferable to form a solid by appropriately combining a metal soap and a chelating agent, such as a melt of an alkaline earth metal soap and a solid chelating agent. The content of sodium percarbonate in the cleaning composition of the present invention is in the range of 30 to 90 kg by weight.

If the amount is larger than this range, the alkaline range will be too strong, promoting corrosion or reducing the stability of the sample during long-term storage.If the amount is smaller than this range, the effect of oxidation will be insufficient. The amount of metal soap used in the cleaning composition of the present invention usually ranges from 0.1 to 20% by weight.

If this amount is less than 0.1% by weight, the rust prevention and penetration effects will be somewhat insufficient, and if it exceeds 20% by weight, the amount of active agent or chelating agent to dissolve it will be large, and the relative As the amount of other ingredients decreases, the overall effect gradually decreases. Further, the amount of the chelating agent in the cleaning composition is in the range of 5 to 60% by weight.

In this case, if the amount of the chelating agent is less than the lower limit of the above range, the amount of metal soap dissolved and the absolute amount of the chelating agent that does not participate in dissolution will be small, resulting in insufficient effect, and if the amount exceeds the upper limit, sodium percarbonate etc. The effect decreases because the content of That is, by adding the chelating agent in the amount within the above range, the metal soap can be sufficiently water-solubilized.

The alkaline cleaning composition of the present invention may contain a dye or a pigment to serve as an indicator of the cleaning liquid, and the amount thereof is usually in the range of 0.01 to 0.5% by weight. others,
The alkaline cleaning composition of the present invention includes sodium silicate,
Boric acid, sodium carbonate, borates such as CMC (carboxymethyl cellulose) perborate, alumino"silicates, etc. may be added as appropriate.

Further, solid powder such as diatomaceous earth, bentonite, and white clay may be added for polishing and cleaning. In the alkaline cleaning composition of the present invention, percarbonate oxidizes and decomposes stains such as grime firmly attached to metal surfaces etc. with its strong oxidizing and foaming effects.

On the other hand, the metal soap can impart antibacterial and antirust properties to the cleaning agent. For this reason, target metals for which the cleaning composition of the present invention is used include aluminum, copper, iron, etc., and these are easily attacked by ordinary inorganic salts and alkali compounds, causing discoloration and pitting corrosion. These problems could be solved by blending this metal soap in the appropriate proportions as described above and making it water-soluble with a chelating agent. Furthermore, by adding a chelating agent, calcium salts and the like in the dirt can be chelated and dissolved, peeled off, dispersed, and removed. Of these, trisodium imidobis sulfate also exhibits a rust-preventing effect on copper and iron. Further, in the present invention, since a metal soap and a chelating agent are used in common, the metal soap exhibits various effects such as penetration, dispersion, emulsification, rust prevention, and antibacterial properties. Therefore, the peeling, dispersing and foaming effects of the cleaning agent are improved. The alkaline cleaning agent composition of the present invention is easily soluble in water, and can exert a strong cleaning effect even on firmly adhered dirt, while also being able to exert a strong cleaning effect on stains that are firmly attached to it. Moreover, it has an excellent effect in that there is no fear of corroding metals and damaging the objects to be used.

Furthermore, since a metal soap is used in combination, it can be given anti-fertility and can also be made of antibacterial group. Moreover, the alkaline cleaning composition of the present invention basically has a low toxicity range. Therefore, the alkaline cleaning composition of the present invention is suitable for cleaning organic and inorganic calcium, magnesium compounds, proteins, animal and vegetable oils,
Suitable for use in cleaning and removing dirt and deposits made of mineral oil, carbohydrates, etc.

In this case, it is usually used as an aqueous solution with a concentration of 0.1 to 5.0% by weight, but the concentration can be changed as appropriate depending on the usage temperature, etc. Next, the present invention will be explained in more detail based on examples.

Note that each test in the examples was conducted according to the following method.

1. Cleaning power 1) Preparation of test pieces Copper plate and aluminum plate (size 8 x 407 ft 11
t1 number) was measured, heated to about 50°C, and then heated to about 80°C. Artificial stain 0.15 with the following composition.
g with a dropper, spread it over the surface, and leave it at room temperature.

2) Measurement method: Put 4 g of sample solution with a concentration of 0.5% by weight into a 12 x 657 nm test tube with a lid, and heat at 40°C and 45°C for 30 minutes to 2 hours at an angle of approximately 150 degrees from the horizontal once per second. The weight change of the amount of dirt deposited was measured and visual observation was made at the same time.

2. Approximately 4 d of test aqueous solution was placed in a test tube with a rust-proof cutter (same as in 1 above), and a test metal piece (metal plate measuring 4 x 20 x 0.8 m!) was immersed in this and placed in a greenhouse at 90°C for 24 hours. Visually observe changes in the metal piece over time.

The metal pieces used as corrosion samples at this time were as shown in the table below. 3. Antibacterial activity Put each sample aqueous solution into a water sampler (manufactured by Nippon Millibore Limited), remove the culture medium after 30 seconds, strain the solution, expose it to the outside air for 1 hour, and leave it still at 38℃ for 1 to 3 days. The number of colonies generated was measured.

Example 1 Samples/F61-11 having the compositions shown in Table 2 were prepared.

Table 3 shows the results of a cleaning test performed on this sample. Table 4 shows the results of the rust prevention ability test. 3rd above
The results of experiments 461-5 in the table show that the compositions of the present invention exhibit significantly superior stain removal rates over the conventional cleaning agents of experiments 7166-11.

On the other hand, from the results in Table 4, it can be seen that the case of the present invention (Experimental Waterfall 1) has superior rust prevention ability compared to the conventional product (Experimental Waterfall 2). Example 2 Various aqueous solutions shown in Table 5 were prepared, and the sample aqueous solutions 1 to 1 were prepared.
An antibacterial activity test was conducted using No. 11 according to the method described above.

Claims (1)

[Scope of Claims] 1. An alkaline cleaning composition characterized by containing 30 to 90% by weight of sodium percarbonate, 0.1 to 20% by weight of a metal soap, and 5 to 60% by weight of a chelating agent. 2 A group in which the chelating agent consists of polybasic carboxylic acids and their salts, oxymonocarboxylic acids and their salts, imide sulfates, polyphosphates, amines, amino acids and their salts, polyaminocarboxylic acid salts, and sulfur-containing carboxylic acid salts The alkaline cleaning composition according to claim 1, which is at least one selected from the following.