JPH0596102A - Dewatering cleaning agent composition - Google Patents

Abstract

PURPOSE:To provide a thermally stable dewatering cleaning agent composition. CONSTITUTION:This, composition is a dewatering cleaning agent composition formed by adding 0.01-50wt.% of an aliphatic mono-carboxylic acid salt having 6-12 carbon number of dicyclohexyl amine to a chlorinated hydrocarbon compound. It is stable for long period at a temp. as it is used for cleaning, lowering of pH value to an acidic side is especially small.

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 removing water adhering to processed parts made of metal or non-metal, such as electronic parts, plated parts, glass parts, etc., and drying them.

[0002]

2. Description of the Related Art Electronic parts, metal parts, glass parts, etc.
2. Description of the Related Art In the manufacturing and processing steps of metal and non-metal processed parts, various kinds of water treatments such as cleaning with water for the purpose of removing dirt are performed. However, the water adhered by these steps must be quickly and accurately removed in order to prevent rust, stains and the like. As one of the methods, there is a method using a chlorinated hydrocarbon compound (for example, JP-A-3-
114501).

An apparatus for carrying out such a method generally comprises, as shown in FIG. 1, 1) a drainage water separation tank, 2) a boiling bath cleaning tank, 3) a cold bath cleaning tank, and 4) a steam cleaning tank. In 1), the water is removed by the draining agent in 1), and the draining agent attached in 2) to 4) is washed and dried. The object to be cleaned moves in the direction of arrow A.

The draining agent used in 1) is a chlorinated hydrocarbon compound to which a stabilizer and a surfactant are added to improve the draining performance. However, in conventional surfactants for draining water (for example, primary amines having 6 to 12 carbon atoms such as laurylamine caproate and 1 to 6 carbon atoms).
(Salt with primary carboxylic acid, etc.) When water is drained in a heated state, or when a draining agent is mixed in the tanks 2) to 4), it is generally concentrated in the tank (finally 4). (System) It decomposes thermally and causes troubles such as pH drop. Therefore, a heat stable drug has been demanded.

[0005]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a draining detergent which can be stably used even at a high temperature, which is used in the draining dryer or the like.

[0006]

DISCLOSURE OF THE INVENTION The present invention is a detergent composition for draining, which comprises adding 0.01 to 5.0% by weight of a salt of dicyclohexylamine and an aliphatic monocarboxylic acid to a chlorinated hydrocarbon compound. Is.

Examples of the chlorinated hydrocarbon compound include methyl chloroform, trichloroethylene and tetrachloroethylene.

The aliphatic carboxylic acid has 6 carbon atoms.
To 12 such as, but not limited to, caproic acid, isocaproic acid, caprylic acid, decanoic acid, and lauric acid. However, caproic acid and caprylic acid are preferable from the viewpoint of stable industrial supply. The salt of dicyclohexylamine and an aliphatic monocarboxylic acid functions as a surfactant.

[0009] This surfactant is preferably 0.01 to 5.0% by weight with respect to the stabilized chlorinated hydrocarbon compound. When the treatment is performed, the water will not be sufficiently drained, causing troubles such as stains and rust. Further, if it is excessive, it causes a cleaning failure in the washing and drying process of the draining agent in the tanks 2) to 4), which becomes a problem. Further, it is economically inconvenient because the effect of the excessive addition cannot be obtained.

[0010]

EXAMPLES The present invention will be described in more detail with reference to Examples and Comparative Examples, and the effects thereof will be clarified.

<Test-1> Thermal stability test ... 150 ml of a detergent for draining was put in a 300 ml Erlenmeyer flask and refluxed by boiling for 40 hours to measure the change in pH.

<Test-2> Draining test ... 50 lighter parts (nickel-plated, made of bare metal) were placed in a stainless steel wire netting basket, immersed in a draining detergent (liquid temperature 25 ° C) for 30 seconds, and drained. The situation was visually confirmed.

[0013]

Example 1 <Test-1> and <Test-2> were tried by adding 0.5% of dicyclohexylaminecaprylate to methyl chloroform.

[0014]

Example 2 A test was conducted in the same manner as in Example 1 using trichlorethylene.

[0015]

[Example 3] Example 1 using tetrachloroethylene
The test was conducted in the same manner as.

[0016]

[Comparative Example 1] 5.0% of laurylamine caproate was added to methyl chloroform, and <Test-1> and <Test-
2> was tried.

[0017]

[Comparative Example 2] A test was conducted in the same manner as in Comparative Example 1 using trichlorethylene.

[0018]

[Comparative Example 3] Comparative Example 1 using tetrachloroethylene
The test was conducted in the same manner as.

Table 1 shows these results and evaluations.

[0020]

[Table 1]

In Table 1, the mark "◯" indicates "good" and the mark "x" indicates "poor".

[0022]

As is clear from Table 1, the detergent composition according to the present invention is stable with a little change in pH even in the thermal stability test, maintains a substantially neutral pH value, and has good drainage. Show the situation. These results are in contrast to those of chlorinated hydrocarbons (Comparative Examples 1 to 3) which show a significantly acidic pH value in the heat stability test.

[Brief description of drawings]

FIG. 1 is a schematic side view of an example of a cleaning device that uses the draining detergent composition of the present invention. 1: Drained water separation tank 2: Boiling bath cleaning tank 3: Cold bath cleaning tank 4: Steam cleaning tank

Claims (1)

[Claims] 1. A drainer characterized by adding 0.01 to 5.0% by weight of a salt of dicyclohexylamine and an aliphatic monocarboxylic acid having 6 to 12 carbon atoms to a chlorinated hydrocarbon compound. Cleaning composition.