JP2577959B2 - Additive for alkaline detergent and alkaline detergent composition containing the same - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an additive for an alkaline cleaning agent, and more particularly, to an additive for an alkaline type cleaning agent, which provides an excellent cleaning effect and improves durability. The present invention relates to an additive for an alkaline cleaning agent capable of improving the current-carrying characteristics and the cleaning liquid state during electrolytic cleaning and further reducing the amount of foam of the cleaning liquid, and an alkaline cleaning composition containing the same.

[Conventional technology and its problems]

Conventionally, alkaline-type cleaning agents have been used for neutralizing acids, saponifying fats and oils, and having electrical conductivity, and have been used to remove strong dirt such as animal and vegetable oils and fats, mineral oils, waxes, greases, proteins, and carbon. It is used industrially as a cleaning agent. In addition, as an industrial field, there is a field of cleaning treatment of metal, metal-plastic parts, glass, and the like, which are widely used in this field. The alkaline cleaning agent varies depending on the stain component, the deterioration of the stain, the adsorption state, and the like, but generally includes various builders such as a surfactant and a chelating agent.

Examples of the cleaning method using an alkaline cleaning agent include immersion cleaning, spray cleaning, brush cleaning, electrolytic cleaning, and a combination thereof. However, the conventional alkaline type cleaning agent has various problems and cannot be said to be sufficiently satisfactory. Particularly, in recent years, as the processing capacity has been increased and energy saving measures have been advanced, performance requirements for cleaning agents have been increased, and further, the cleaning process has been required to be improved. For this reason, improvement goals of cleaning agents include
Improvement of stamina of cleaning liquid, low temperature cleaning, improvement of current-carrying characteristics during electrolytic cleaning, reduction of the amount of cleaning liquid brought out by the object to be cleaned, reduction of basic unit by preventing outflow of cleaning liquid by foaming, etc., handling of cleaning liquid For example, simplification and the like are mentioned, and there is a strong demand for an alkaline cleaning agent having high stable operation and satisfying all the above-mentioned performances.

In particular, detergents containing straight-chain fatty acids or salts thereof and straight-chain fatty acid esters resulting from the detergent composition or contaminant contamination components reduce stable operability due to deterioration of current-carrying characteristics, increase the amount of washing liquid taken out, and In view of the above, there has been a problem that the basic unit soars due to an increase in the outflow amount of the cleaning liquid due to foaming, and the demand for the above-mentioned cleaning agent is even greater.

[Means for solving the problem]

Therefore, the present inventors have conducted intensive studies to satisfy such a demand, and as a result, by adding or including a specific branched fatty acid or a salt thereof in an alkaline detergent, the above-mentioned required performance can be achieved. This led to the completion of the present invention.

That is, the present invention provides a compound represented by the following general formula (I) RCOOM (I) wherein R is a branched aliphatic hydrocarbon group having a branched chain having 1 to 14 carbon atoms and having a total carbon number of 9 to 24. Wherein M represents hydrogen, an alkali metal, an alkaline earth metal, an aliphatic amine having 1 to 4 carbon atoms, ammonia or an alkanolamine), and reduces the foaming amount of the washing liquid. The present invention provides an additive for an alkaline detergent which can be used and an alkaline detergent composition containing the additive.

Examples of the branched carboxylic acid represented by the formula (I) of the present invention and a salt thereof include, for example, 2,3-dimethylnonanoic acid,
4,4-dimethyldecanoic acid, 2-ethyl-3-methylnonanoic acid, 2-methyldocosanoic acid, 2-propyl-3-methylnonanoic acid, 4,10-dimethyldodecanoic acid, 2-methyl-
2-dodecenoic acid, isodecanoic acid, isopalmitic acid, isolauric acid, isomyristic acid, isostearic acid,
Examples include isodocosanoic acid, Guerbet-type palmitic acid, Guerbet-type docosanoic acid, Guerbet-type decanoic acid, and the like, and salts thereof.

Further, M in the formula (I) constituting these salts
Is an ion of an alkali metal tail, an alkaline earth metal, an aliphatic amine having 1 to 4 carbon atoms, ammonia or an alkanolamine having 2 to 10 carbon atoms, and specific examples include, for example, methylamine, ethylamine, propylamine, Examples thereof include ions of butylamine, ethylenediamine, diethylenetriamine, ammonia, monoethanolamine, diethanolamine, triethanolamine, other alkanolamines having C _{2 to} C ₁₀ , potassium, sodium, calcium, and magnesium.

The additive for an alkaline cleaning agent of the present invention (hereinafter referred to as “additive”)
Is abbreviated as 0.01 to 30% by weight (hereinafter simply referred to as "%") as an amount of the compound (I) in the alkaline detergent. In particular, when the detergent has a pH of 10 or more or is used as a detergent for cleaning metals, it is preferable that the compound (I) is contained in an amount of 0.1 to 30%.

Examples of the alkaline detergent to which the additive of the present invention is added include those containing (a) an alkali agent and / or (b) a surfactant.

The alkali agent of the component (a) is a water-soluble alkali agent, and specific examples thereof include sodium hydroxide, sodium hydroxide, sodium silicate, sodium metasilicate, sodium silicate No. 1, sodium silicate No. 2, sodium silicate No. 3, and the like. Sodium silicate; sodium phosphate such as sodium tripolyphosphate, sodium orthophosphate and sodium metaphosphate; and the like.

The amount of the component (a) relative to the final composition is 0.1 to 50.
%, Preferably, so that the pH is 10 or more.

Examples of the surfactant (b) include anionic surfactants, nonionic surfactants, cationic surfactants, and amphoteric surfactants.

Among them, specific examples of anionic surfactants include:
Higher alcohol sodium sulfate, triethanolamine lauryl sulfate, ammonium lauryl sulfate, sodium dodecylbenzene sulfonate, sodium alkylnaphthalene sulfonate, sodium dialkyl sulfosuccinate, sodium polyoxyethylene alkyl ether sulfate, sodium polyoxyethylene alkyl ether sulfate, triethanolamine polyoxyethylene alkyl ether sulfate , Sodium polyoxyethylene alkyl phenyl ether sulfate, and sodium salt of β-naphthalene sulfonate formalin condensate.

Examples of the nonionic surfactant include polyoxyethylene alkyl ether, polyoxyethylene alkyl aryl ether, polyoxyethylene alkylamino ether, sorbitan fatty acid ester, polyoxyethylene sorbitan fatty acid ester, polyoxyethylene fatty acid ester, and glycerin fatty acid monoester. -, Di-ester and the like. In particular, the following general formula (II) R ₁ —O— (CH ₂ CH ₂ O) _n (CH ₂ CH ₂ CH ₂ O) _m H (II) (wherein R ₁ is H and has 1 to 1 carbon atoms) 18 straight-chain aliphatic hydrocarbon group, a branched chain aliphatic hydrocarbon group having 1 to 12 carbon atoms or an alkyl group having an alkylphenyl group having 1 to 12 carbon atoms,
n is from 0 to 60, m is from 0 to 60, and n + m is a number larger than 1.

Specific examples of these include, for example, 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, polyoxypropylene octyl phenyl ether, polyoxypropylene nonyl Phenyl ether, polyoxypropylene decyl phenyl ether, polyoxypropylene dodecyl phenyl Ether, polyoxypropylene butyl ether, and the like.

Furthermore, examples of the cationic surfactant include alkylamine acetate, alkylamine hydrochloride, and quaternary ammonium salt, and examples of the amphoteric surfactant include alkyldimethylamine oxide and alkylcarboxymethylhydroxyethyl imidazolium betaine. No.

The amount of the component (b) to be added to the final detergent composition is 0.01 to 30%.

Further, in the present invention, an organic chelate type builder can be blended for the purpose of further improving the cleaning effect and the like. Such include, for example, glycine,
Alkali metal salts such as nitrilotriacetic acid, ethylenediaminetetraacetic acid, diethylenetriaminepentaacetic acid, ethylenediaminediacetic acid, iminodiacetic acid, triethylenetetraminehexaacetic acid, metaphenylenediaminetetraacetic acid, hydroxyethylethylenediaminetriacetic acid, norleucine aminobutyric acid, or lower alkali metal salts Aminocarboxylic acids such as amine salts; and oxycarboxylic acid-type chelate builders such as alkali metal salts such as malic acid, citric acid, gluconic acid, glucoheptonic acid, and mucous acid, and lower amine salts.

〔The invention's effect〕

The additive of the present invention can sufficiently satisfy the required performance of the cleaning agent by being added to a cleaning agent comprising an alkali agent, an alkali agent and a surfactant, or an alkali agent, a surfactant and a chelating agent. It was something that could be done. That is, when an additive was added to each of the above three types of detergents, the detergency of the detergent after the addition was improved as compared with that before the addition. Similar results were obtained in stamina. Regarding the current-carrying characteristics during electrolytic cleaning, the difference between the presence and absence of the additive was clear, and it was confirmed that the characteristics were greatly improved by the addition of the additive of the present invention. Further, as another effect of the additive of the present invention, it was possible to suppress a thickening phenomenon of the cleaning liquid due to mixing of the dirt component into the cleaning liquid. From these facts, the additive of the present invention is also applicable to various required performances such as improvement of the cleaning liquid state, reduction of the amount of the cleaning liquid brought out by the object to be cleaned, prevention of the cleaning liquid flowing out due to foaming, low-temperature cleaning properties, and easy handling of the cleaning liquid. It was confirmed that the characteristics were improved by the addition of.

〔Example〕

Hereinafter, the present invention will be described in more detail with reference to Examples.
The present invention is not limited by these examples.

Example 1 The additive of the present invention was added to an alkaline cleaning agent, and its cleaning properties (degreasing power and durability) were examined. This result is
The results are shown in Table 2 and Table 2.

(Composition) I Additives Guerbet-type palmitic acid Isostearic acid Guerbet-type docosanoic acid Guerbet-type decanoic acid The additive was added to be 0.5% by weight based on the alkaline-type detergent.

II Alkaline detergent (a) sodium hydroxide 3.0% (b) sodium orthosilicate 3.0% (c) (a) + anionic surfactant 0.5% (d) (a) + nonionic surfactant 0.5% (e) (A) + 0.5% cationic surfactant (f) (b) + 0.5% anionic surfactant (g) (b) + 0.5% nonionic surfactant (h) (b) + cationic surfactant Agent 0.5% (i) (d) + chelating agent 0.3% (j) (g) + chelating agent 0.3% The surfactants and chelating agents used are as follows.

Anionic surfactant: sodium salt of formalin condensate of naphthalene sulfonate Nonionic surfactant: 9 mol adduct of nonylphenol ethylene oxide Cationic surfactant: stearylamine acetate Chelating agent: ethylenediaminetetraacetic acid (Test method) 1) Degreasing power 0.2g of lubricant is uniformly attached to the surface of a stainless steel pipe degreased with a trichloroethylene solvent.
The test piece was left standing for a long time, and immersed and washed under the following conditions. Thereafter, the test piece was washed with running water for 30 seconds, and dried with hot air. The residual oil on the test piece surface treated as described above was extracted with a trichloroethylene solvent, the weight of the extracted oil was measured, and the degreasing rate was determined and evaluated by the following equation.

Test conditions Stainless steel pipe: SUS304TPD Lubricant: Mineral oil + synthetic ester (commercially available) Cleaning agent concentration: described on the previous page Cleaning liquid temperature: 60 ° C Cleaning time: 5 minutes Cleaning liquid stirring: 500 rpm (2) Durability According to the above conditions (1) , Pipe processing number 10, 50 and 10
The 0th degreasing power was evaluated.

Example 2 The alkali cleaning agent prepared in Example 1 was tested for electrical conductivity during electrolytic cleaning. The evaluation of the electrical conductivity was performed based on the amount of corrosion of the electrode, which is considered to be the cause of the decrease in the electrical conductivity, that is, the weight loss of the electrode. Table 3 shows the results.

(Test conditions) Electrode: Stainless steel plate (SUS-430) Electrode area: 10 mm x 50 mm: 5 cm ² Cleaning solution concentration: Same as in Example 1 Cleaning solution temperature: 80 ° C Additive concentration: Same as in Example 1 Current density: 100 A / dm ² electrolysis time: 60 minutes Example 3 With respect to the alkaline cleaning agent prepared in Example 1, the carry-out amount and foaming of the cleaning liquid were examined. Table 4 shows the results.

(Test method) 1% of commercially available beef tallow was added to each washing solution, and then 2 hours at 80 ° C.
The mixture was stirred for a period of time and subjected to a sufficient saponification reaction to obtain a test sample. The steel sheet was immersed vertically in this sample solution for 5 seconds, and then left vertically in the air for 20 seconds. The amount of the cleaning liquid adhering to the steel plate subjected to the above treatment was measured, and the amount was taken out of the cleaning liquid. Further, 50 ml of the same washing solution was put into a 200-ml graduated cylinder equipped with a stopper, and was vigorously shaken 20 times by hand. Then, the foam amount after 1 minute was measured.

Claims (6)

(57) [Claims] 1. The following general formula (I) RCOOM (I) wherein R is a branched aliphatic hydrocarbon group having a branched chain having 1 to 14 carbon atoms and a total of 9 to 24 carbon atoms. And M represents hydrogen, an alkali metal, an alkaline earth metal, an aliphatic amine having 1 to 4 carbon atoms, ammonia, or an alkanolamine), which contains a branched carboxylic acid represented by the formula: Additives for alkaline detergents that can be used. 2. The additive according to claim 1, which is used for a strong alkaline detergent having a pH of 10 or more. 3. An alkaline detergent composition having a pH of 10 or more, comprising an alkaline agent and the additive according to claim 1 as essential components. 4. An alkaline agent, a surfactant and a first agent.
An alkaline detergent composition having a pH of 10 or more, which contains the additive according to the above item as an essential component. 5. The additive according to claim 2, wherein the additive is used as a cleaning agent for metals. 6. The alkaline detergent composition according to claim 3, which is a detergent for metals.