JPH10237492A - Detergent composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a foreign-odor-free safe water-soluble acidic detergent composition excellent in liquid stability and the ability to deterge the adherent working oil from metal components or drawn components by using a specified (alkyl) benzenesulfonic acid and a specified glycol ether as the essential components. SOLUTION: This composition essentially consists of desirably 1-70wt.%, more desirably 10-50wt.% at least one (alkyl)benzenesulfonic acid of formula I (wherein R<1> and R<2> are each a 1-16C alkyl or alkenyl or H) and desirably 1-70wt.%, more desirably 20-50wt.% at least one glycol ether of formula II (wherein R<3> is a 1-9C alkyl, a 1-9C alkenyl, phenyl or a 1-5C alkyl-substituted phenyl; R<4> is H, a 1-9C alkyl or a 1-9C alkenyl; a is a 2-4C alkylene; n is 1-20; and the group (AO)n is composed of oxyalkylene groups of the same type or at least two types).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention provides an aqueous acidic detergent composition which is excellent in detergency and liquid stability and is safe when processing metal parts and metal wire drawn parts.

[0002]

2. Description of the Related Art Conventionally, for cleaning a processing oil for metal parts, a chlorine-based solvent or BTX such as benzene, toluene and xylene has been used.
Many system solvents have been used. Further, in the field of detergents that require a high degree of cleanability in a short time, such as the field of wire drawing, chlorine-based solvents, BTX-based solvents, and combinations of these solvents and surfactants, and BTX-based solvents An acidic cleaning agent using a solvent and a mineral acid represented by nitric acid in combination has been used.

[0003] In the cleaning method using a chlorine-based solvent, trichloroethylene, perchlorethylene, or the like is used, and the immersion cleaning method is mainly an ultrasonic cleaning method, a brushing method, or the like.
It is used in combination with a steam cleaning method. Also, B
In cleaning methods using a combination of a TX-based solvent and a surfactant or a combination of a BTX-based solvent and nitric acid, an immersion cleaning method is used in many cases. Thus, chlorinated solvents,
A cleaning agent used in combination with a BTX-based solvent and a surfactant and a cleaning agent used in combination with a BTX-based solvent and nitric acid have been widely used as cleaning agents in the metal cleaning field, particularly in the wire drawing industry, because of their high cleaning performance.

However, chlorine solvents such as those described above and B
TX solvent-based cleaning agents have been problematic in that they pollute the environment and harm the health of employees.

In recent years, there has been a demand for the development of a detergent which does not use a solvent having such safety problems at all, and a method using a strong alkaline agent such as potassium hydroxide and a surfactant as an alkaline detergent. (JP-A-1-283394) and a method in which an inorganic acid such as nitric acid is used in combination with an oxycarboxylic acid or a lower carboxylic acid as an acidic cleaning agent (JP-A-8-176870).

However, alkaline cleaning agents have problems such as insufficient stamina detergency, and cleaning agents to which mineral acid has been added damage the equipment, especially when nitric acid is used as a cleaning base. Has pointed out the danger of explosion when mixed with organic matter as described in the "Dangerous Goods Handbook".

[0007]

DISCLOSURE OF THE INVENTION The present invention relates to a water-soluble material having excellent cleaning ability, liquid stability, and safety against wire drawing oil adhering during processing in a metal part or wire drawing production line. An object of the present invention is to provide an acidic cleaning agent.

[0008]

In order to solve the above-mentioned problems, the acidic cleaning composition of the present invention is selected from benzenesulfonic acid and alkylbenzenesulfonic acid represented by the above formula (Chemical Formula 1). It is characterized by containing, as essential components, at least one compound selected from the group consisting of glycol ethers represented by the above formula (Formula 2).

Further, the acidic cleaning composition of the present invention preferably further contains a surfactant.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Each compound contained in the cleaning composition of the present invention will be described sequentially. Specific examples of the benzenesulfonic acid and alkylbenzenesulfonic acid compounds represented by the above formula (Formula 1) include benzenesulfonic acid, ortho, meta, paratoluenesulfonic acid, ortho,
Meta, para-xylene sulfonic acid, ethyl benzene sulfonic acid, diethyl benzene sulfonic acid, isopropyl benzene sulfonic acid, amyl benzene sulfonic acid, diamyl benzene sulfonic acid, decyl benzene sulfonic acid, dodecyl benzene sulfonic acid and the like can be mentioned.

The amount of these sulfonic acids to be added to the detergent composition of the present invention is preferably 1 to 70% by weight, more preferably 10 to 50% by weight.

The glycol ethers represented by the above formula (Formula 2) include glycol monoethers and glycol diethers.

As the glycol monoethers, specifically, ethylene glycol monomethyl ether, diethylene glycol monomethyl ether, triethylene glycol monomethyl ether, ethylene glycol monopropyl ether, diethylene glycol monopropyl ether, triethylene glycol monopropyl ether, ethylene glycol monomethyl ether Butyl ether, diethylene glycol monobutyl ether, triethylene glycol monobutyl ether, ethylene glycol monohexyl ether, diethylene glycol monohexyl ether, ethylene glycol mono-2-ethylhexyl ether, diethylene glycol mono-2-ethylhexyl ether, and the like.

The glycol diethers include ethylene glycol dimethyl ether, ethylene glycol diethyl ether, ethylene glycol dibutyl ether, diethylene glycol dibutyl ether and the like.

These compounds may be used alone or in combination of two or more.

Among the glycol ethers represented by the above formula (Formula 2), the glycol moiety is preferably formed by addition of ethylene oxide or propylene oxide, and the number of moles n of addition is preferably from 1 to 4. .

The amount of these glycol ethers to be added to the detergent composition of the present invention is preferably 1 to 70% by weight, more preferably 20 to 50% by weight.

Further, the detergent composition of the present invention may contain a surfactant. As the surfactant, it is possible to use a nonionic surfactant, an anionic surfactant, a cationic surfactant, and an amphoteric surfactant. In particular, a nonionic surfactant, an anionic surfactant, The agent is effective.

Examples of the nonionic surfactant include the following. Here, p indicates the average number of moles of alkylene oxide added. As the alkylene oxide, ethylene oxide, propylene oxide, butylene oxide or a mixed adduct thereof is used.

1) Polyoxyalkylene (p = 1 to 4)
0) alkyl or alkenyl (C ₁₀ -C ₂₂ ) ether 2) polyoxyalkylene (p = 1-40) alkyl or alkenyl (C ₆ -C ₂₂ ) phenyl ether 3) polyoxyalkylene (p = 0.5-40) ) alkyl or alkenyl (C ₁₀ -C ₂₂₎ amine 4) polyoxyalkylene (p = 0.5 to 50) alkyl or alkenyl (C ₁₀ -C ₂₂₎ amide 5) ethylene oxide-propylene oxide block adduct (Pluronic type surfactants Activator)

Among the above nonionic surfactants, the nonionic surfactant represented by the following formula (Formula 3) is most suitable for the present invention.

[0022]

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(Wherein, R ⁵ is an alkyl group having 10 to 22 carbon atoms, an alkenyl group having 10 to 22 carbon atoms, or 6 carbon atoms)
And a phenyl group having from 12 to 12 alkyl groups. Also,
A represents an alkylene group having 2 to 4 carbon atoms, p represents an average number of added moles of the oxyalkylene group (AO), and 3 to 20.
Is the number of However, the oxyalkylene group may be either the same oxyalkylene group alone or a mixture of two or more oxyalkylene groups. )

These surfactants may be used alone or in combination of two or more.

Examples of the anionic surfactant include the following. 1) a linear alkylbenzene sulfonic acid salt having an alkyl group having an average of 10 to 16 carbon atoms 2) an alpha olefin sulfonic acid having an average of 10 to 20 carbon atoms and a salt thereof 3) an alkyl group or an alkenyl group having 4 to 10 carbon atoms
4) Alkyl sulfuric acid having an average of 10 to 20 carbon atoms and a salt thereof 5) having a linear or branched alkyl or alkenyl group having an average of 10 to 20 carbon atoms, and having an average of 0.5 to Alkyl ether sulfuric acid to which 8 mol of ethylene oxide is added and salts thereof 6) Saturated or unsaturated fatty acids having 10 to 22 carbon atoms and salts thereof

When these anionic surfactants are salts, alkali metals such as sodium and potassium or alkanolamines such as monoethanolamine and diethanolamine are used as counter ions.

These surfactants may be used alone or in combination of two or more.

The surfactant is preferably incorporated in the cleaning composition of the present invention in an amount of 1 to 50% by weight, more preferably 1 to 30% by weight.

The cleaning composition of the present invention may optionally contain other optional components. As these optional components, glycols such as ethylene glycol and propylene glycol, lower alcohols such as methanol and ethanol, and rust inhibitors such as benzotriazole can be blended.

The cleaning composition of the present invention has a pH of 4 or less, and is mainly used as a liquid cleaning agent containing water as an essential component. Further, the detergent composition of the present invention can be washed using the composition as it is, or can be diluted with water and used as an aqueous solution or dispersion.

[0031]

EXAMPLES Hereinafter, the present invention will be described in more detail with reference to examples. Examples 1 to 12 and Comparative Examples 1 to 3 According to the formulations shown in Tables 1 and 2, a detergent composition was prepared, and a metallic soap (boric acid, silicic acid, Tables 1 and 2 show the results of the evaluation of detergency performed using a mixture of sulfate and calcium stearate) and mineral oil. In addition, the test method and evaluation method of the detergency were performed by the method shown below.

(1) Washing test method A stainless steel wire drawn by using metal soap or mineral oil as a wire drawing agent is cut into 10 cm and used for washing. 100m
Take a stock solution of each detergent composition in a glass bottle and keep it at a constant temperature of 25 ° C. The drawn wire is immersed in the detergent solution and left standing for 10 seconds.
Furthermore, lightly shake and rinse in ion exchange water at 25 ° C.
Dry at room temperature.

(2) Detergency evaluation method The drawn wire after washing is observed under a light source, and visually evaluated according to the following criteria to determine the detergency. However, a pass of ○ or more is considered as a pass. ◎: Very good with no residual wire drawing agent ○: Good with almost no residual wire drawing agent Δ: Slightly with some residual wire drawing agent, slightly poor ×: Bad with remaining wire drawing agent

[0034]

[Table 1]

[0035]

[Table 2]

* 1) Surfactant 1: C ₁₂ H ₂₅ O (C ₂ H ₄
O) ₈ H

* 2) Surfactant 2: a compound represented by the following formula (Formula 4)

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* 3) Surfactant 3: a compound represented by the following formula (Formula 5)

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[0039]

EFFECT OF THE INVENTION The cleaning composition of the present invention removes strong stains adhered to metal parts and drawn wire by halogenated hydrocarbon solvents,
Without using a cleaning agent containing a BTX solvent, it is possible to obtain a cleaning agent which is safe, has no peculiar odor, and exhibits a high degree of cleaning performance.

Claims (2)

[Claims] 1. A method of preparing one or more compounds selected from benzenesulfonic acid and alkylbenzenesulfonic acid represented by the following formula (1) and glycol ethers represented by the following formula (2): An acidic detergent composition comprising, as an essential component, at least one compound selected from the group consisting of: Embedded image (In the formula, R ¹ and R ² each represent an alkyl group or alkenyl group having 1 to 16 carbon atoms or a hydrogen atom, and may be the same or different.) (Wherein, R ³ is an alkyl group having 1 to 9 carbon atoms, 1 to 9 carbon atoms)
9 is an alkenyl group, a phenyl group or a phenyl group having an alkyl group having 1 to 5 carbon atoms, and R ⁴ is a hydrogen atom or an alkyl or alkenyl group having 1 to 9 carbon atoms.
A represents an alkylene group having 2 to 4 carbon atoms; n represents an average number of added moles of the oxyalkylene group (AO);
-20. However, the oxyalkylene group may be either the same oxyalkylene group alone or a mixture of two or more oxyalkylene groups. ) 2. The acidic cleaning composition according to claim 1, further comprising a surfactant.