JP2617247B2 - Cleaning composition for precision parts or jigs - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a detergent composition, and more particularly, to oils and fats, machine oils, cutting oils, greases and the like present on the surface of precision parts or jigs and tools used in the assembly and processing steps thereof.
The present invention relates to a cleaning composition that is excellent in removing contaminants such as liquid crystal and rosin-based flux and is excellent in rinsing properties.

[0002]

2. Description of the Related Art Conventionally, for removing contaminants mainly composed of organic substances such as oils and fats present on surfaces of precision parts and jigs, hydrocarbon solvents such as kerosene, benzene and xylene; trichloroethylene, tetrachloroethylene, etc. Chlorinated solvents; CFC-based solvents such as trichlorotrifluoroethane; and aqueous cleaning agents in which a surfactant or a builder is mixed with sodium orthosilicate or caustic soda.
In particular, components such as electronics, electricity, and machinery use a chlorofluorocarbon-based solvent or a chlorine-based solvent, taking advantage of their high cleaning properties and flame retardancy.

[0003]

However, cleaning agents using chlorine-based and chlorofluorocarbon-based solvents are safe, toxic,
It has a major problem in environmental pollution. On the other hand, water-based detergents are preferable in that they have low toxicity, but are several times inferior in detergency.

In the case of cleaning agents used for precision parts and the like, if the cleaning agent remains on the surface of the object to be cleaned after cleaning, the cleaning parts may have an adverse effect on plastic parts and the like. ing.

Accordingly, an object of the present invention is to remove contaminants such as oils and fats, machine oil, cutting oil, grease, liquid crystal, and rosin-based flux present on the surface of precision parts or jigs and tools used in the assembling process thereof. An object of the present invention is to provide a detergent composition which is excellent in detergency and rinsing properties, has no fear of environmental pollution, and is highly safe.

[0006]

Means for Solving the Problems As a result of intensive studies, the present inventors have found that a detergent composition having a specific viscosity, which is a combination of two specific compounds in a specific ratio, has the above object. It was found that this was achieved.

The present invention has been made on the basis of the above findings, and (A) is represented by the following Chemical Formula 3 (same as Chemical Formula 1).
Compounds of viscosity ℃ is 0.5~10cp, (B) the following formula 4
A compound represented by the same formula (Chemical formula 2) , average HLB 4-1
0.5 to 35% by weight of a nonionic surfactant of 5 and water 5
-50% by weight, and the mixing ratio (weight ratio) of the component (A) and the component (B) is (A) / (B) =
90/10 to 5/95, and the viscosity is 0.5 to
An object of the present invention is to provide a cleaning composition of 20 cp for precision parts or jigs and tools used in an assembling process thereof.

[0008]

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[0009]

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

The component A of the present invention includes, for example, the following compounds.

Compounds in which X in the above formula (3) is the following formula (5) include alkylbenzenes such as ethylbenzene,
Olefins such as octene, dodecene, tetracene, tetrapropylene and tetraisobutylene; olefin polymers; compounds having a cyclohexene ring such as limonene and pinene; However, when the cleaning composition of the present invention is a rosin-based solder
In the case of a detergent composition for flux, R ¹ , R
² , a compound having a total carbon number of 7 to 13 of R ³ and R ⁴
Substances (ie, hydrocarbon compounds having 8 to 14 carbon atoms) are excluded.
You .

[0013]

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Compounds in which X in the above formula (3) is -COO- include methyl coconut fatty acid, isopropyl myristate, 2-ethylhexyl stearylate, methyl laurate, methyl oleate, isobutyl oleate and the like. Butyl acrylate, 2-ethylhexyl acrylate, benzyl methacrylate, benzyl acetate and the like.

Compounds in which X in the above formula (3) is -CO- include, for example, diisobutyl ketone, 2,6,
8, trimethyl 4-nonanone, isophorone, and the like. Examples of the compound in which X in the above formula (3) is -O- include dihexyl ether and dibenzyl ether.

Examples of the compound in which X in the above formula 3 is the following formula 6 include dimethyllaurylamine, dimethylmyristylamine, dilaurylmonomethylamine,
Trioctylamine and the like, and compounds in which X in the above formula 3 is the following formula 7 include N, N-dimethylacetanilide and the like.

[0017]

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[0018]

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Among these compounds, particularly preferred are:
X is a compound having an unsaturated bond of hydrocarbon, an alkylbenzene, an olefin, and a compound having a cyclohexene ring, wherein X in the above chemical formula 3 is the above chemical formula 5. Further, a compound such as methyl laurate or methyl oleate wherein X in the above formula 3 is —COO— is also particularly preferred.

The component (A) has a viscosity at 20 ° C. of 0.5
10 cp, preferably 0.5-8 cp, particularly preferably 0.5-5 cp. When the viscosity at 20 ° C. is less than 0.5 cp, the flammability of the detergent composition is high, and safety during washing becomes a problem. On the other hand, if it is more than 10 cp, the cleaning property is not sufficient for the contaminants in a narrow gap portion, which is not preferable.

The above-mentioned component (A) is used alone or in combination of two or more kinds.
0% by weight is preferred.

The component (B) of the present invention has 3 to 3 carbon atoms.
8 alcohols, fatty acids or amines are reacted in the presence of a catalyst such as caustic with addition of an alkylene oxide having 2 to 4 carbon atoms (ethylene oxide, propylene oxide, butylene oxide, etc.) in a liquid or gaseous state while heating. It can be obtained by: Random addition polymerization in which two or more alkylene oxides are mixed and reacted, or block addition polymerization in which alkylene oxides are sequentially added may be performed. The polyalkylene ether obtained in this manner is purified to remove unreacted substances and catalyst, and (B)
Used as an ingredient. Further, a compound obtained by methylating, ethylating or butylating the terminal hydroxyl group of the polyalkylene ether with an alkyl chloride or the like is also a compound (B) of the present invention.
Included in ingredients. The alcohol having 3 to 8 carbon atoms used for producing the component (B) of the present invention includes, for example, n
-Propanol, butanol, hexanol, octanol, 2-ethylhexanol, cyclohexanol,
Benzyl alcohol, etc .;
The fatty acids and amines Nos. To 8 include those corresponding to these alcohols.

By blending the above-mentioned component (B), the viscosity of the composition is reduced, the detergency is improved, the hydrophilicity is improved, and rinsing is facilitated.

The component (B) is a compound of the formula (4)
Is more than 3, the viscosity increases, and the amount taken out of the cleaning liquid to the rinsing tank is undesirably increased. In addition, the above formula 4
If the number of carbon atoms in R is 2 or less, affinity with organic substances is reduced, and good detergency cannot be obtained. Further, R has 8 carbon atoms.
If it exceeds, the viscosity will increase, and the detergency and the water rinsing property will decrease. The carbon number of R is preferably 3 to 6.

The above-mentioned component (B) may be used alone or in combination of two or more kinds.
90% by weight is preferred.

The viscosity of the detergent composition of the present invention containing the components (A) and (B) is 0.5 at 40 ° C.
-20 cp, preferably 1-15 cp. When the viscosity is less than 0.5 cp, the flammability of the detergent composition is high,
Safety during cleaning is a problem. If it is over 20cp,
Inferior cleaning performance for contaminants in narrow gaps.

In the cleaning composition of the present invention, the mixing ratio (weight ratio) of the component (A) and the component (B) is (A) / (B) = 90/10 to 5 /. 95, preferably 70/30 to 5/95. If the compounding ratio is outside the above range, either the water rinsing property or the washing property is impaired.

It is composed of the above components (A) and (B).
Although the detergent composition is excellent in solubility in organic soil substances, the solubility in water is reduced when the amount of the component (A) is large, so that poor rinsing may occur when rinsing with water. When water is contained , the stability of the product may be poor due to low solubility in water. The cleaning composition of the present invention comprises the component (A) described above and
(B) In addition to component, non-ionic field of average HLB 4-15
Such a problem occurs because it contains a surfactant
There is no fear .

Examples of the nonionic surfactant include polyoxyalkylene alkyl ether, polyoxyalkylene alkyl phenol ether, polyoxyalkylene alkyl fatty acid ester, polyoxyalkylene allyl phenol ether, polyoxyalkylene sorbitan fatty acid ester, polyoxyalkylene alkyl. Amines, sorbitan fatty acid esters, polyoxyalkylenes, and the like are preferably used, and among these, an average HLB of 4 to
15 exhibit particularly excellent effects. Here, polyoxyalkylene refers to a polymer of ethylene oxide, propylene oxide, or butylene oxide.

[0030] The amount of the nonionic surfactant in the detergent composition, from 0.5 to 35% (wt%, hereinafter the same), more preferably 3 to 30%. The blending amount is 0.
If it is less than 5%, no compounding effect is observed, and 35%
If it is more than 1, the viscosity of the composition is undesirably increased.

The detergent composition of the present invention contains water from the viewpoint of safety and operability. The mixing amount of water is 5 to 50% in the detergent composition.

The detergent composition of the present invention may further contain, if necessary, other surfactants as long as the effect is not impaired.
An antifoaming agent such as silicone, an amine or phenolic antioxidant, a rust inhibitor, an alkanolamine, or the like may be added.

The detergent composition of the present invention can be produced by mixing the above-mentioned components (A) and (B) by a conventional method.

The method for cleaning using the cleaning composition of the present invention is not particularly limited. For example, ultrasonic cleaning or immersion cleaning is performed using the cleaning composition of the present invention, and finally, rinsing is performed with a solvent or hot water. And the like are continuously performed as an efficient cleaning method. Further, various cleaning methods such as a vibration method and a spray method may be used.

[0035]

The cleaning composition of the present invention is used for cleaning precision parts or jigs and tools used in the assembling process of the precision parts. At this time, the components (A) and (B) act to clean the surface of the object to be cleaned. To remove contaminants present in After the cleaning, the cleaning composition of the present invention remaining on the surface of the object to be cleaned is washed away by rinsing the object to be cleaned with water or the like.

[0036]

EXAMPLES Hereinafter, the present invention will be described in more detail with reference to Examples and Comparative Examples, but the present invention is not limited thereto.

Examples 1 to 4 and Comparative Examples 1 to 13

[0038] Detergent compositions having the compositions shown in Tables 1 and 2 below were prepared, and for each of the detergent compositions, soil substance removal (rinsing power), rinsing (rinsing), and product stability. Was evaluated as follows. The results are shown in Tables 1 and 2 below.

(Evaluation Method of Soil Removal and Rinsing Properties)

A rosin flux-treated printed circuit board, a copper plate coated with a naphthenic mineral oil, or a glass substrate coated with a liquid crystal containing a nematic liquid crystal as a main component was immersed in each of the detergent compositions, 10 sheets each. 3 at 40 ° C
Washing was performed while applying ultrasonic waves for one minute, and the removability of contaminants at that time was evaluated. Next, the above-mentioned printed circuit board, copper plate or glass substrate washed with the detergent composition was subjected to a rinsing treatment with ion-exchanged water at 20 ° C., and the rinsing property was visually evaluated. The evaluation criteria for the removability and rinsing properties of the contaminants are as follows.

Evaluation criteria for removal of dirt substances A: Dirt substances (flux, naphthenic mineral oil or liquid crystal)
Very good with no residue. ；: Good with almost no residual dirt. Δ: Slight residue of dirt substance was slight and slightly poor. X: Soil substance remains and is bad.

Evaluation criteria for rinsing properties A: very good. ；: Good. Δ: slightly inferior. ×: Bad.

(Method of evaluating product stability)

The appearance of each cleaning composition was visually observed at room temperature according to the following evaluation criteria.

Evaluation criteria for product stability ○: Uniform and transparent. Δ: slight separation or turbidity. X: completely separated.

[0046]

[Table 1]

[0047]

[Table 2]

[0048]

The cleaning composition of the present invention has excellent detergency and rinsing properties as a cleaning composition for jigs and tools used in precision parts or assembling processes thereof, and has a high degree of chlorofluorocarbon and the like. Since it is not used, it does not pollute the environment and has high safety.

 ──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-3-28387 (JP, A) JP-A-3-62895 (JP, A) JP-A-4-65495 (JP, A) JP-A-4-654 182062 (JP, A)

Claims (1)

(57) [Claims] 1. A nonionic interface of (A) a compound represented by the following formula 1 and having a viscosity at 20 ° C. of 0.5 to 10 cp , (B) a compound represented by the following formula 2, and an average HLB of 4 to 15:
The composition contains 0.5 to 35% by weight of an activator and 5 to 50% by weight of water , and the mixing ratio (weight ratio) of the component (A) to the component (B) is (A) / (B) = 90/10 to 5/9
5. A cleaning composition for jigs and tools used in precision parts or assembling processes thereof, which has a viscosity of 0.5 to 20 cp at 40 ° C. Embedded image Embedded image