JPH06122897A - Degreasing cleaner - Google Patents

Abstract

(57) [Summary] [Structure] A degreasing detergent containing alkylene glycol alkyl ether or alkylene glycol alkyl phenyl ether and water. [Effect] The oil deposit can be efficiently washed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a degreasing detergent used to remove oils attached to metal parts and the like.

[0002]

2. Description of the Related Art Cutting oil is used in the cutting process of precision machine parts, electric parts, etc., but in many cases it does not become a product when these parts adhere to each other. It is washed and removed using a solvent. Known organic solvents used in these are hydrocarbon solvents such as kerosene, benzene and xylene, chlorine solvents such as trichloroethylene and tetrachloroethylene, and freon solvents such as trichlorotrifluoroethane. In particular, CFC-based or chlorine-based solvents, which have characteristics of high cleanability and nonflammability, are used for electronic, electrical, mechanical and other parts.

[0003]

However, the above-mentioned hydrocarbon solvents, especially benzene, xylene, etc., are highly toxic and are compounds designated as harmful substances under the Industrial Safety Law, so the danger of handling them is high. However, the chlorine-based or chlorofluorocarbon-based solvents have major problems such as safety, toxicity, and environmental pollution.

[0004]

DISCLOSURE OF THE INVENTION The inventors of the present invention have solved the conventional problems and provide a degreasing detergent which is excellent in degreasing and washing properties of oils and the like, and which has safety, working environment hygiene and environmental pollution As a result of intensive studies, they have found that an alkylene glycol alkyl ether or a mixed solvent of alkylene glycol alkyl phenyl ether and water is a detergent capable of achieving the above object, and completed the present invention.

The present invention will be described in more detail below. As the degreasing detergent in the present invention, a mixture of alkylene glycol alkyl ether or alkylene glycol alkylphenyl ether containing water is used. The degreasing detergent has a composition of the alkylene glycol alkyl ether of usually 50 to 90% by weight, preferably 60 to 90% by weight.
85% by weight, more preferably 70 to 85% by weight and 10 to 50% by weight of water, preferably 15 to 40% by weight, more preferably 15 to 30% by weight. When the content of water in the mixture is less than 10% by weight, the mixture has a flash point, together with the problem that the degreasing cleaning effect lasts longer, that is, the cleaning effect decreases when it is repeatedly used.
It must be handled as dangerous goods.

The water content of the mixture is 50% by weight.
If the amount is larger, the degreasing and cleaning effect is significantly reduced. Further, when the water content in the mixture is in the above range, it is easy to float and separate without removing the degreased oil after the degreasing treatment, the mixture can be repeatedly used for a long time, and the whole amount of the mixture can be collected or periodically. Not only does it need to be replaced, but a water content of 15% by weight or more is preferable because the mixture does not catch fire and can be handled as a non-hazardous material.

As the alkylene glycol alkyl ether used in the degreasing detergent of the present invention,
Alkylene glycol alkyl monoesters such as dipropylene glycol monomethyl ether, tripropylene glycol monomethyl ether, dipropylene glycol monoethyl ether, diethylene glycol monoethyl ether, diethylene glycol monobutyl ether, dipropylene glycol dimethyl ether, tripropylene glycol dimethyl ether, diethylene glycol diethyl ether, tri Polyalkylene glycol alkyl diethers such as ethylene glycol dimethyl ether and diethylene glycol ethyl butyl ether are used. Examples of the alkylene glycol alkyl phenyl ether include diethylene glycol methyl phenyl ether and dipropylene glycol ethyl phenyl ether.

Items to be cleaned using the degreasing cleaning agent of the present invention include precision parts and jigs and tools used in the assembling process thereof. Among them, the precision parts include electronic parts, electrical parts, precision machine parts, resin processed parts, optical parts and the like. Specifically, examples of electronic components include printed wiring boards, IC lead frames, capacitors, liquid crystal displays, and semiconductor materials. Examples of electric machine parts include electric motor parts such as brushes and housings. The precision machine parts include bearings and parts for machining. Examples of the optical component include a lens.

Further, the jigs and tools used in the above-mentioned assembly and processing step include jigs and tools which handle the above-mentioned precision parts in various steps such as manufacturing, molding, processing, assembling and finishing. As the oils attached to the above-mentioned objects to be cleaned,
Examples thereof include oils and fats, machine oils, cutting oils, greases and the like. The degreasing cleaning agent of the present invention is usually 40-100 by various cleaning methods such as a dipping method, an ultrasonic cleaning method, a rocking method and a spraying method.
Used at a temperature of ° C.

[0010]

EXAMPLES The present invention will be described in more detail with reference to specific examples. Examples 1 to 5 Test pieces of the materials shown in Table 1 (29.8 mm × 49.
(8 mm x 3.0 mm thick) After immersing one in cutting oil,
100 parts of the degreasing detergent having the composition shown in Table 1 is added to Table 1
After soaking at the temperature and time shown in Table 1, the remaining oil state on the surface of the test piece taken out was visually observed, and the results evaluated by the following evaluation criteria are shown in Table 1. ○: Completely removed. Δ: A trace amount remains. X: Remains considerably.

After the above cleaning, the floating oil was removed and the cleaning agent was repeatedly used 100 times. The result was the same as above, and there was no problem. Also, regarding each cleaning agent, J
Table 1 also shows the results of the flammability test carried out in accordance with the flash point test method for crude oil and petroleum products of IS K2266.

Comparative Examples 1 and 2 The same procedure as in Example 1 was repeated except that the cleaning agent having the composition shown in Table 1 was used. The results are shown in Table-1.

[0013]

[Table 1]

[0014]

EFFECTS OF THE INVENTION The degreasing detergent of the present invention can efficiently wash an object to be washed with oil. Moreover,
The degreasing detergent has good safety and workability.

Front page continuation (72) Inventor Tetsuo Asanuma 3-10 Shiodori, Kurashiki-shi, Okayama Mitsubishi Kasei Co., Ltd. Mizushima Plant

Claims (1)

[Claims] 1. A degreasing detergent containing alkylene glycol alkyl ether or alkylene glycol alkyl phenyl ether and water.