JP3229712B2 - 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 cleaning composition, and more particularly, to a cleaning composition which is excellent in removing dirt present on a solid surface of a precision part or a jig used in an assembly process thereof. Composition.

[0002]

2. Description of the Related Art
Removal of dirt mainly composed of organic substances such as oils and fats present on solid surfaces such as precision parts and jigs is performed by removing hydrocarbon solvents such as kerosene, benzene and xylene; chlorine solvents such as trichloroethylene and tetrachloroethylene; A fluorocarbon-based solvent such as fluoroethane; a water-based detergent obtained by mixing a surfactant or a builder with sodium orthosilicate or caustic soda is used. In particular, fluorocarbon-based solvents or chlorine-based solvents are used for components such as electronics, electricity, and machinery, taking advantage of their high cleaning properties and flame retardancy.

[0003] However, cleaning agents using chlorine-based and chlorofluorocarbon-based solvents have serious problems in safety, toxicity, environmental pollution and the like. In addition, hydrocarbon solvents, especially benzene and xylene, are highly toxic and are designated as hazardous substances under the Industrial Safety and Health Law. It is not preferable to use it as an agent. On the other hand, an aqueous detergent is preferable in that it has a lower risk and toxicity than a solvent-based detergent, but is inferior in detergency by several steps.

Therefore, in recent years, US Pat.
No. 4,640,719, No. 4,640,719
Limonene as seen in the specification of US Pat.
Terpenes such as pinene and dipentene have been proposed.
Terpenes typified by limonene are compounds that can achieve both safety and detergency, but have a problem that they have a low flash point and require large-scale equipment during use. In addition, since it is derived from natural products, it is difficult to obtain products of stable quality, and there is a limit in the supply amount, and it is not practical as an industrial detergent.

Accordingly, there has been a demand for a detergent composition which is excellent in detergency and safety, has no environmental pollution, and can remove dirt components present on solid surfaces such as precision parts and jigs. .

[0006]

Under such circumstances, the present inventors have conducted intensive studies. As a result, the use of a compound represented by the following general formula (1) or (2) provides excellent cleaning and safety. Further, they have found that a cleaning composition having no environmental pollution and useful for precision parts or jigs and tools can be obtained, and the present invention has been completed.

[0007] That is, the present invention provides a cleaning for precision parts or jigs and tools used in an assembling process thereof, containing a compound represented by the general formula (1) or (2) (hereinafter referred to as compound A). The present invention provides an agent composition.

[0008]

[0009]

[0010]

[0011]

[0012]

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Wherein R ¹ is a hydrogen atom or a group having 1 to 1 carbon atoms.
8 represents a hydrocarbon group, R ² represents a hydrocarbon group having 1 to 18 carbon atoms, and R ³ represents a hydrogen atom, a methyl group or a hydroxymethyl group.]

In the general formulas (1) and (2), the hydrocarbon group having 1 to 18 carbon atoms represented by R ¹ and R ² is a linear or branched alkyl group, an aromatic group such as an alkylphenyl group. Examples include alicyclic hydrocarbon groups such as hydrocarbon groups and cycloalkyl groups. Specific examples include methyl, ethyl, propyl, isopropyl, butyl, isobutyl, hexyl, heptyl, heptyl, and octyl. Group, 2-ethylhexyl group, 1-methylpropyl group, 1,3-dimethylbutyl group, 1-pentylhexyl group, 1-isopropyl-2-methylpropyl group, 1-isobutyl-3-methylbutyl group, lauryl group, oleyl Group, stearyl group, phenyl group, benzyl group, octylphenyl group, cyclohexyl group, 4-methylcyclohexyl group, 3-methylcyclohexyl group, And a 2-methylcyclohexyl group.

The compound A is preferably incorporated in the composition in an amount of from 10 to 100% by weight (hereinafter simply referred to as%), particularly from 25 to 100%.

It is preferable to further add a nonionic surfactant to the detergent composition of the present invention, because the dirt retention ability in water and the rinsing property with water are further improved, and the detergency is increased.
As such nonionic surfactants, the average HLB 4-1
8 are preferable, for example, polyoxyalkylene alkyl ether, polyoxyalkylene alkyl phenol ether, polyoxyalkylene alkyl fatty acid ester, polyoxyalkylene allyl phenol ether, polyoxyalkylene sorbitan fatty acid ester,
Examples thereof include polyoxyalkylene alkylamines, sorbitan fatty acid esters, and polyoxyalkylenes, and those having an average HLB of 4 to 15 are particularly preferred. As the polyoxyalkylene, a polymer of ethylene oxide, propylene oxide, and butylene oxide is preferable.

It is preferable that these nonionic surfactants are incorporated in the total composition in an amount of 0.1 to 30%.

The cleaning composition of the present invention can be appropriately mixed with water and hydrocarbons according to the nature of the stain such as water-soluble and oil-soluble stains. As the hydrocarbons, those having 10 to 20 carbon atoms are preferable. For example, linear or branched hydrocarbons such as decane, dodecane, tetradecane, hexadecane, octadecane, decene, dodecene, tetradecene, hexadecene, octadecene; alkylbenzene; methyl Naphthalene compounds such as naphthalene and dimethylnaphthalene; and cyclo compounds such as cyclodecane and cyclododecene. Among these, straight-chain and branched-chain hydrocarbons having 12 to 18 carbon atoms and cyclo-hydrocarbons are preferable in consideration of safety, toxicity, odor and the like. Hydrogen is particularly preferred.

When water is added to the detergent composition of the present invention, the amount of water is preferably 5 to 90%, particularly preferably 5 to 30%, and the total amount of compound A and the nonionic surfactant. Preferably, the amount is from 10 to 95%, especially from 40 to 95%. Incorporation of water in this way is particularly preferable in terms of performance and safety, because it is excellent in removing water-soluble stains such as inorganic salts and the flammability is reduced.

When hydrocarbons are blended in the detergent composition of the present invention, the blending amount is 1 to 60.
%, Especially 1 to 50%, and the total amount of compound A and hydrocarbons is 10 to 99%, especially 40 to
Preferably it is 99%. When hydrocarbons are blended in this way, the removability of oily stains such as mineral oils and fats and oils is particularly improved.

Further, the detergent composition of the present invention contains components used in ordinary detergents, for example, an anionic surfactant,
Surfactants other than nonionic surfactants such as amphoteric surfactants; various alcohols such as ethanol, butyldiglycol and hexylglycol; organic acids such as citric acid, tartaric acid and phthalic acid; alkanols such as triethanolamine and diethanolamine Amine; other rust preventives, preservatives, defoamers, antioxidants, and the like can be appropriately compounded as long as the effects of the present invention are not impaired.

The cleaning composition of the present invention has a particularly excellent effect on cleaning precision parts and jigs and tools used in assembling and processing the same. In the present invention, precision parts refer to, for example, electronic parts, electric parts, precision machine parts, resin processed parts, optical parts and the like. Here, examples of the electronic component include a printed wiring board used for a computer and its peripheral devices, home appliances, communication devices, OA devices, and other electronic devices; contact members such as IC lead frames, resistors, capacitors, and relays. Hoop material used for OA equipment, watches,
Liquid crystal displays used in computer equipment, toys, home appliances, etc .;
Magnetic recording components used for video / audio recording / reproducing components, their related components, etc .; Semiconductor materials such as silicon and ceramic wafers; Electrostrictive components such as quartz oscillators; CDs, PDs, copying devices, optical recording devices, etc. And the like. Examples of the electric parts include electric motor parts such as brushes, rotors, stators, and housings; ticketing parts used in vending machines and various devices; and currency inspection parts used in vending machines and cash dispensers. Examples of precision machine parts include bearings used for precision drive equipment, video recorders, and the like; machining parts such as carbide tips, and the like. Examples of the resin processed parts include precision resin processed parts used for cameras, automobiles, and the like. Further, as optical components, cameras, glasses, lenses used in optical equipment and the like,
In addition, eyeglass frames, watch cases,
A watch belt and the like can be mentioned.

In the present invention, the jigs and the like used in the assembling process include jigs for processing precision parts as shown in the above-mentioned various parts in various steps such as manufacturing, molding, processing, assembling and finishing. In addition to tools, it refers to various devices that handle these precision parts, their parts, and the like.

The cleaning composition of the present invention exhibits a suitable performance particularly for a printed wiring board in which the flux remains, among the above-mentioned cleaning compositions. It is not limited to these examples,
Precision parts and jigs and tools with a solid surface of a certain shape that adhere to various post-process interfering substances such as processing oil and flux in the assembling process, or various oily contaminants that degrade product characteristics. If so, the cleaning composition of the present invention can be applied.

Furthermore, these contaminants include, for example, fats and oils, machine oils, cutting oils, greases, rosin-based fluxes, liquid crystals,
The cleaning composition of the present invention is particularly effective when the soil is mainly organic oil, such as petroleum pitch, wax, etc., and is sufficiently washed and removed even if the soil is mixed with metal powder, inorganic powder, and moisture. can do.

The cleaning composition of the present invention can be used in various cleaning methods such as an immersion method, an ultrasonic cleaning method, a vibration method, a spray method, a steam cleaning method, a hand wiping method, and a water displacement drying method, and has favorable results. Can be obtained.

When the cleaning agent of the present invention is used in the step of cleaning a printed circuit board to which flux has adhered, for example, first, it is immersed in a cleaning tank containing the cleaning agent composition of the present invention, showered, showered in liquid or ultrasonically cleaned. Then, rinsing with water or the like enables efficient cleaning.

[0028]

EXAMPLES Next, the present invention will be further described with reference to examples, but the present invention is not limited to these examples.

Example 1 Detergent compositions having the compositions shown in Tables 4 and 5 were produced by a conventional method, and their cleaning properties and flux removal properties were evaluated. The compounds used are as shown in Table 3, and the results are shown in Tables 4 and 5.

(1) Detergency test Naphthenic mineral oil (40 ° C., 350 cst) is applied at a rate of 500 mg / m ² to a steel test piece of 70 mm × 150 mm. Further, 1 g of a liquid crystal containing a nematic liquid crystal as a main component is applied to a 100 mm × 100 mm glass plate. These test pieces are immersed in a cleaning solution maintained at 40 ° C.
Washed with ultrasonic for 5 minutes. Next, it was immersed in ion-exchanged water at 30 ° C. for 10 seconds, dried, and then visually evaluated for cleaning properties according to the following criteria.

[0031]

[Table 1] (Evaluation Criteria) ：: Extremely clean surface ○: Mineral oil and little liquid crystal residue on surface △: Mineral oil and little liquid crystal residue on surface ×: Mineral oil and liquid crystal residue on surface

(2) Flux Removal Test The printed wiring board on which the IC chip was mounted was subjected to a flux treatment, followed by a solder treatment to obtain a test piece. The test piece was immersed in a cleaning liquid kept at 50 ° C., and washed for 3 minutes under the flow of the cleaning liquid by a jet flow in the liquid. Then 30 ° C
After rinsing with ion-exchanged water and drying, the removability of the flux from the printed wiring board was visually evaluated according to the following criteria.

[0033]

[Table 2] (Evaluation Criteria) な く: No residual flux and extremely high cleaning power ○: Almost no residual flux and high cleaning power △: Slight residual flux but high cleaning power ×: Residual flux Wears, poor cleaning power

[0034]

[Table 3]

[0035]

[Table 4]

[0036]

[Table 5]

[0037]

The cleaning composition of the present invention is excellent in cleanability and safety, and has no environmental pollution. Particularly, it is used as a cleaning agent for precision parts or jigs and tools used in the assembling process thereof. It is useful.

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) C11D 7/26 C23G 1/24 CA (STN) REGISTRY (STN)

Claims (1)

(57) [Claims] 1. A compound represented by the general formula (1) or (2): [In the formula, R ¹ represents a hydrogen atom or a hydrocarbon group having 1 to 18 carbon atoms, R ² represents a hydrocarbon group having 1 to 18 carbon atoms,
R ³ represents a hydrogen atom, a methyl group or a hydroxymethyl group.] A cleaning composition for precision parts or jigs used in the assembling process of the precision parts.