JP3222656B2 - Detergent composition - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water-based cleaning composition useful for cleaning various electronic parts and precision instruments, and more particularly to a cleaning composition that replaces a CFC-based cleaning agent or a chlorine-based cleaning agent. is there.

[0002]

2. Description of the Related Art A rosin solder flux used for a printed circuit board or a liquid crystal cell, a precision part, a metal part for an electronic part such as a jig used for an assembling process, a printed wiring, It is required to completely remove stains mainly composed of organic substances such as oils present on solid surfaces of electronic components such as integrated circuits and shadow-processed parts such as shadow masks and precision machines.

[0003] In the field where such a high cleaning ability is required, a chlorofluorocarbon-based solvent, a chlorine-based solvent and the like have been mainly used. However, although these solvents have excellent detergency, the development of a detergent that can replace them is being promoted due to the environmental problem of destroying the ozone layer surrounding the earth.

For example, a detergent containing 70% or more of a cyclic saturated hydrocarbon having 9 to 18 carbon atoms obtained by hydrogenating a terpene or an aromatic compound (JP-A-3-62896); A detergent containing an aliphatic hydrocarbon and an organic compound having a polar group (JP-A-3-146597), or an aliphatic hydrocarbon having 8 to 11 carbon atoms, a monohydric alcohol and an aliphatic dihydric alcohol mono-lower alkyl ether; And / or a cleaning agent for a spray apparatus comprising an aliphatic dihydric alcohol mono-lower alkyl ether acetate.

[0005] However, cleaning agents using these materials have insufficient cleaning ability, and have not been able to sufficiently solve environmental and safety problems.

Accordingly, an object of the present invention is to provide a cleaning composition which is an excellent alternative to a chlorofluorocarbon-based cleaning agent or a chlorine-based cleaning agent, and has an excellent effect on cleaning various electronic parts and precision machines. .

[0007]

As a result of various studies, the present inventors have found that a detergent composition containing a specific hydrocarbon compound can achieve the above object, and have reached the present invention. did.

That is, the present invention provides a detergent composition containing a hydrocarbon compound represented by the following general formula (I) of the following [Chemical formula 2] (the same as the above [Chemical formula 1]). is there.

[0009]

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Hereinafter, the cleaning composition of the present invention will be described in detail.

In the hydrocarbon compound represented by the above general formula (I) used in the present invention, the alkyl group having 1 to 4 carbon atoms represented by R _{1 to} R ₄ includes, for example, methyl,
Ethyl, propyl, isopropyl, butyl, isobutyl, sec-butyl, tert-butyl and the like, and examples thereof include straight-chain or branched alkylene groups having 1 to 3 carbon atoms represented by A, methylene, ethylene, Examples include groups such as propylene, ethylidene, 1,2-propylene, and isopropylidene.

Accordingly, the hydrocarbon compounds represented by the above general formula (I) include N represented by the following formulas (3) to (7).
o. 1 to No. 5 compounds are illustrated.

[0013]

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[0014]

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[0015]

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[0016]

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[0017]

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The content of the hydrocarbon compound is preferably 10 to 90% by weight, more preferably 20 to 70% by weight in the detergent composition.

The detergent composition of the present invention may be further blended with conventional aliphatic alcohols, alkylene glycol monoalkyl ethers and alkyl ether acetates and / or surfactants, alone or in combination. , The effect can be further increased.

The amounts of the above-mentioned aliphatic alcohols, alkylene glycol monoalkyl ethers and alkyl ether acetates and surfactants are preferably 0.1 to 40% by weight in the detergent composition of the present invention. . When the amount is less than 0.1% by weight, no effect is exhibited.
If it is added in an amount of 0% by weight or more, these may remain on the cleaning surface, which may affect the properties of the cleaned part.

The aliphatic alcohols are preferably aliphatic alcohols having 6 to 30 carbon atoms, such as hexanol, octanol, 2-ethylhexanol and the like.
Examples include natural and synthetic alcohols such as nonyl alcohol, lauryl alcohol, oleyl alcohol and alcohol synthesized by the oxo method.

Examples of the alkylene glycol monoalkyl ethers and alkyl ether acetates include ethylene glycol monomethyl ether,
Examples include ethylene glycol monoethyl ether, ethylene glycol monobutyl ether, ethylene glycol monoethyl ether acetate, propylene glycol monomethyl ether, propylene glycol monoethyl ether, propylene glycol monophenyl ether, propylene glycol monomethyl ether acetate, and propylene glycol monoethyl ether acetate. be able to.

As the above-mentioned surfactant, any of anionic surfactants, cationic surfactants, zwitterionic surfactants, etc. can be used. It is desirable to use an ionic surfactant.

Examples of the nonionic surfactant include polyoxyethylene alkyl ethers such as polyoxyethylene lauryl ether, polyoxyethylene cetyl ether and polyoxyethylene oleyl ether;
Polyoxyethylene alkylphenyl ethers such as polyoxyethylene nonyl phenyl ether and polyoxyethylene octyl phenyl ether; polyoxyethylene polyoxypropylene block polymer, polyoxysorbitan fatty acid ester, polyoxyethylene fatty acid ester, polyoxyethylene alkylamine, polyoxyethylene Polyoxyethylene derivatives such as oxyethylene fatty acid amide; sorbitan fatty acid ester, glycerin fatty acid ester and the like can be used. These can be used alone, but preferably used in combination of two or more.

The cleaning composition of the present invention may further contain, if necessary, various hydrocarbon solvents, organic acids such as citric acid, tartaric acid and phthalic acid, alkanolamines such as monoethanolamine and diethanolamine, rust inhibitors, Preservatives, defoamers, stabilizers, antioxidants and the like can be appropriately compounded.

The cleaning composition of the present invention can be used in various cleaning methods such as an immersion method, an ultrasonic cleaning method, an oscillating method, a spray method, a steam cleaning method, a hand wiping method, and a water displacement drying method, and is preferable. The result can be obtained.

[0027]

EXAMPLES Hereinafter, the cleaning composition of the present invention will be described in more detail by way of examples. However, the present invention is not limited in any way by these examples.

Example 1 A cleaning composition having the composition shown in the following <Combination> was prepared, and the cleaning property of a liquid crystal cell and the cleaning property of a printed circuit board were evaluated by the following evaluation method. The results are shown in Table 1 below.

<Combination>% by weight Hydrocarbon compound (shown in Table 1 below) 60 Ethylene glycol monobutyl ether 10 Polyoxyethylene nonyl phenyl ether 20 (n = 8)

[Cleaning of Liquid Crystal Cell] A commercially available liquid crystal is impregnated into the cell cap (9 μm) around the liquid crystal cell by capillary action. This cell was placed in the above-mentioned undiluted detergent composition solution for 4 hours.
After ultrasonic cleaning at 0 ° C. for 2 minutes, the liquid crystal was sufficiently washed with pure water, and the removability of the liquid crystal (cleaning property of the liquid crystal cell) was determined using a polarizing microscope.

(Evaluation Criteria) A: The liquid crystal is completely removed. ：: Liquid crystal was almost completely removed. Δ: A large amount of liquid crystal remains. ×: Almost no liquid crystal was removed.

[Cleaning of Printed Circuit Board] A printed wiring board on which an IC chip was mounted was subjected to a flux treatment and then a solder treatment to obtain a test piece. This test piece was immersed in an aqueous solution obtained by diluting the above-mentioned detergent composition to 50% with pure water.
After performing ultrasonic cleaning for 5 minutes, the substrate was sufficiently cleaned with pure water, and the removability of the flux (cleaning property of the printed circuit board) was visually determined.

(Evaluation Criteria) A: The flux is completely removed. ：: Flux was almost completely removed. Δ: A large amount of flux remains. X: Flux was hardly removed.

[0034]

[Table 1]

Example 2 A cleaning composition having the composition shown in the following <Combination> was prepared, and the cleaning property of a liquid crystal cell and the cleaning property of a printed circuit board were evaluated in the same manner as in Example 1 using the same. . The results are shown in Table 2 below.

<Combination> wt% hydrocarbon compound (No. 1 compound) 50 propylene glycol monophenyl ether 10 surfactant (shown in [Table 2] below) 30

[0037]

[Table 2]

As is clear from the above results, the cleaning composition containing the specific hydrocarbon compound of the present invention is excellent in cleaning properties of liquid crystal cells and printed circuit boards, and is a fluorocarbon cleaning agent or a chlorine cleaning agent. It has a cleaning effect for electronic components that replaces the agent. On the other hand, those using a paraffinic hydrocarbon or an aliphatic saturated hydrocarbon which has been conventionally used as an alternative have insufficient cleaning effects. Further, the cleaning composition of the present invention also has a cleaning effect on precision instruments.

[0039]

The cleaning composition of the present invention contains a specific hydrocarbon compound and replaces a chlorofluorocarbon-based cleaning agent or a chlorine-based cleaning agent, and is excellent in cleaning various electronic parts and precision machines. This has the effect.

Continued on the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) C11D 7/50 C11D 7/24 CA (STN) CAOLD (STN) REGISTRY (STN)

Claims (1)

(57) [Claims] 1. A cleaning composition comprising a hydrocarbon compound represented by the following general formula (I). Embedded image