JPH07247499A - Cleanser for wax - Google Patents

Abstract

PURPOSE:To obtain a wax cleanser comprising a specific compound, not decomposing the ozonosphere, excellent in cleansing selectivity and rinsability, and suitable for cleansing waxes used for processing metal, glass or resin parts. CONSTITUTION:This wax cleanser comprises a compound of the formula (R is a 1-4C alkyl; (n is 2, 3) such as diethyleneglycol dimethyl ether. The compound of the formula may be used as a cleansing solution as such in the state of the raw solution, but is preferably, if necessary, mixed with <=10wt.% of water and subsequently used as the cleanser solution.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cleaning agent for cleaning waxes used for processing metal / glass or resin parts.

[0002]

2. Description of the Related Art Conventionally, as a cleaning agent for contaminants such as fats, oils, machine oils, cutting oils, grease, and rosin flux, which are present on the solid surfaces of precision parts and jigs and tools used in their assembly and processing steps, Halogenated hydrocarbons represented by CFC-113, 1,1,1-trichloroethane, petroleum hydrocarbons or various water-based detergents are used.

As the water-based detergent, a composition composed of a combination of inorganic alkalis or organic alkalis and various surfactants, a combination of a high boiling point solvent and a surfactant, etc. is used. A detergent composition containing a specific alkylene oxide compound in such a detergent composition has been proposed (JP-A-3-97792, JP-A-4-57897, JP-A-4-57898).

On the other hand, waxes used for processing metal, glass or resin parts remain as contaminants on the surface of the parts, and there is a demand for an excellent cleaning agent for removing these waxes.

When the above-mentioned halogenated hydrocarbons are used for cleaning such waxes, the cleaning properties are excellent,
There is a problem in safety due to environmental pollution as a causative substance that destroys the ozone layer and its toxicity, and its use is restricted.

Further, when the above petroleum hydrocarbons are used, the removability of the cleaning liquid, that is, the residual property after cleaning is a problem.

Further, when the above-mentioned various water-based cleaning agents are used, the cleaning properties and safety of a wide variety of pollutants are secured, but with respect to the cleaning of waxes, the removability of the waxes and cleaning liquid, that is, after cleaning, There is a problem with the cleaning efficiency such as the residual property, the high cleaning temperature, and the long cleaning time.

[0008]

SUMMARY OF THE INVENTION The present invention has been made in view of such conventional problems, and has excellent cleaning property (that is, removability) and rinsing property for waxes. As a result of intensive studies to develop a cleaning agent, it was found that a specific ethylene oxide compound satisfies the above conditions, and the present invention has been completed. That is, it is a wax cleaner comprising a compound represented by the following general formula (I).

[0009]

[Chemical 2]

(Requirements Constituting Means) The detergent used in the present invention comprises a compound represented by the following general formula (I).

[0011]

[Chemical 3]

Specifically, diethylene glycol dimethyl ether, triethylene glycol dimethyl ether, diethylene glycol diethyl ether, triethylene glycol diethyl ether, triethylene glycol dipropyl ether, triethylene glycol dibutyl ether. Tell, etc., and they can be used alone or in combination.

These compounds of the general formula (I) can be obtained by a known method, for example, having 1 to 1 carbon atoms.
2 mol or 3 mol of ethylene oxide is added and polymerized to the lower alcohol of 4, and after the purification treatment, the ends are blocked with methyl chloride or the like and the purification treatment is obtained.

The waxes to be washed are mainly solid preparations containing an ester of a fatty acid and a higher monovalent or divalent alcohol as a main component, and an isoparaffin called a microcrystalline wax. Solid formulation,
A general term for components that are fixed or temporarily bonded, or are used as an insulating material, rust-preventive processing such as polishing, or as a surface treatment agent, which become unnecessary after the treatment step or pose a problem in the next step treatment. It was done. Specific examples thereof include carnauba wax which is a representative of vegetable wax, animal wax such as wood wax and beeswax which are high melting point fats, and petroleum wax which is representative of microcrystalline wax.

The target material of the cleaning agent is a metal, glass or resin material, which is used as a part for various purposes.

The compound represented by the general formula (I) may be used as the undiluted solution as a washing solution, but if necessary, the undiluted solution may be mixed with water up to 10% by weight and used as the washing solution. However, it is not preferable to add water in an amount of more than 10% by weight, because the detergency of waxes becomes extremely poor.

Also, when other compounds such as amine compounds, nonionic surfactants, anionic surfactants and the like are used in combination with the detergent of the present invention, the detergency of waxes and the rinsing ability of the detergent are deteriorated. It is not preferable.

In the cleaning method, the object to be cleaned is immersed in the cleaning liquid of the present invention at a temperature within the range of 80 ° C. from room temperature, and waxes, which are contaminants, are dissolved and cleaned. As other cleaning methods, ultrasonic cleaning method, rocking method, spray method, steam cleaning method,
Although there are a hand-wiping method, a water displacement drying method, and the like, any washing method can be used.

[0019]

The cleaning agent of the present invention quickly dissolves and cleans waxes adhering to the material used for processing in the cleaning step, and further has excellent water solubility, so that it is easily removed in the rinsing step.

[0020]

EXAMPLES Production Example ( Production Example of Detergent of Example 1) 2 mol of ethylene oxide was added and polymerized to methyl alcohol, followed by purification treatment, end-capping with methyl chloride, and purification treatment. To obtain diethylene glycol dimethyl ether. The cleaning agents used in the other examples of Table 1 and Table 2 were manufactured in the same manner as in the above-mentioned manufacturing example.

Examples 1 to 6 and Comparative Examples 1 to 11 The detergents shown in Table 1 were used to evaluate the detergency of the wax and the residual ability (rinseability) of the detergent by the following methods. It was shown to.

A standard aluminum part was immersed in molten carnauba wax for 3 minutes, taken out, and then subjected to a test after cooling. Next, the cleaning agent shown in Table 1 is heated to 60 ° C., and the aluminum part is dipped in the cleaning agent at 28 KHz · 150.
Ultrasonic cleaning of W was performed for 2 minutes. Next, pure water rinsing was performed at 60 ° C. and drying (air drying) was performed. Regarding the parts after drying,
The detergency of the wax by the gravimetric method and the residual property of the detergent visually were evaluated according to the following criteria.

Detergency ⊚: 95% or more detergency ∘: 94% to 80% detergency Δ: 79% to 50% detergency ×: 49% or less detergency

Residual property (rinseability) ⊚: Not confirmed ∘: Slightly confirmed Δ: Remaining confirmed ×: Remarkable remaining confirmed

[0025]

[Table 1]

Examples 7 to 12 and Comparative Examples 12 to 22 Using the cleaning agents shown in Table 2, the detergency and residual property of the wax and the residual property of the cleaning agent were evaluated by the following methods, and the results are shown in Table 2. Indicated.

A standard glass plate was dipped in molten microcrystalline wax for 3 minutes, taken out, and then cooled and subjected to a test. Next, the cleaning agent shown in Table 2 is heated to 60 ° C., and the glass plate is immersed in this, and it is heated at 40 KHz / 300 W for 3
Ultrasonic cleaning for 3 minutes was performed 3 times by changing the cleaning tank and dried (air-dried). With respect to the dried parts, the detergency of the wax by the gravimetric method and the visual appearance (remaining property of both the cleaning agent and the wax) were evaluated according to the following criteria.

Detergency ⊚: 95% or more detergency ◯: 94% to 80% detergency Δ: 79% to 50% detergency ×: 49% or less detergency

Residual property (detergent and wax) ⊚: Not confirmed ∘: Slightly confirmed Δ: Remaining confirmed ×: Remarkable remaining confirmed

[0030]

[Table 2]

From Tables 1 and 2, diethylene glycol dihexyl ether is inferior in wax cleaning effect and rinsing property, and ethylene glycol dimethyl ether is excellent in residual property (rinsing property) but remarkably inferior in wax cleaning effect.
Further, a composition of tetraethylene glycol dimethyl ether or a conventional inorganic alkali and a surfactant is inferior in wax cleaning effect and rinsability. Further, a composition containing 50% by weight of water in the detergent of the present invention has a poor wax-dissolving effect and rinsability, and a composition containing 2% by weight of an amine compound has an excellent wax cleaning effect. Rinseability is poor.

[0032]

The cleaning agent of the present invention is CFC-113 or 1,
Compared to petroleum hydrocarbons, which does not correspond to ozone-depleting substances referred to as 1,1-trichloroethane, exhibits easy removal performance of cleaning agents that are unnecessary after cleaning, and selects cleaning for pollutants. The solubility can be improved, high solubility can be obtained as compared with water-based detergents widely used today and water-based detergents composed of surfactants, and wax-based contamination can be removed rapidly and effectively.

Claims (1)

[Claims] 1. A wax cleaner comprising a compound represented by the following general formula (I). [Chemical 1]