JPH0457898A - Aqueous detergent composition - Google Patents

Abstract

PURPOSE:To prepare an aqueous detergent compsn. excellent in detergency, safety and adaptability to rinsing and free from the danger of environmental pollution by compounding a specified alkylene oxide compd. with water. CONSTITUTION:An aqueous detergent compsn. comprising 5-50% wt. of an alkylene oxide compd. selected from those of formulas I, II and III and 50-95% wt. of water. In the formulas, R<1> is a 1-8C hydrocarbon residue; R<2> and R<3> are each a 2-4C alkylene group; Y is H, 1-4C alkyl or acyl; m is 1-7; n is 0-3; lis 0-5; and p is 0-5. The detergency of the compsn. can be improved by adding an amine compd. The aqueous detergent compsn. is useful as a detergent for precision parts or the jigs and tools used in assembling precision parts.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention provides an aqueous cleaning composition, and more specifically, a water-based cleaning composition that cleanses oils, fats, and mechanical This invention relates to an aqueous cleaning composition that is excellent in removing stains such as oil, cutting oil, grease, liquid crystal, rosin flux, etc., and has excellent rinsing properties.

[Problems to be solved by conventional techniques and inventions] Conventionally,
Kerosene, benzene,
Hydrocarbon solvents such as xylene; chlorine solvents such as trichlorethylene and tetrachloroethylene; fluorocarbon solvents such as trichlorotrifluoroethane; water-based cleaning agents containing surfactants and builders in sodium orthosilicate and caustic soda, etc. are used. There is. In particular, fluorocarbon solvents or chlorinated solvents are used for electronic, electrical, mechanical, and other parts due to their high cleaning properties and flame retardant properties.

However, cleaning agents using chlorine-based and fluorocarbon-based solvents have major problems in terms of safety, toxicity, environmental pollution, and the like. In addition, hydrocarbon solvents, especially benzene and xylene, are highly toxic compounds and are designated as hazardous substances under the Industrial Safety and Health Act. It is not preferable to use it as an agent. On the other hand, water-based detergents are preferable in that they are less dangerous and toxic than solvent-based detergents, but they are several steps inferior in cleaning power.

Therefore, in recent years, as cleaning agents with low environmental pollution and high safety, US Pat. No. 4.511488, US Pat. No. 4.640.719, and US Pat.
Terpenes such as limonene, pinene, and dipentene, as seen in the specification of the above patent, have been proposed. These terpenes, typified by limonene, are compounds that are both safe and easy to clean, but they have a low flash point and require large-scale equipment when used. Furthermore, because it is derived from natural products, it is difficult to obtain products of stable quality, and there is a limit to the amount of supply, making it impractical as an industrial cleaning agent.

On the other hand, rinsability after cleaning is also a problem, since residual cleaning agents may have an adverse effect on plastic parts and the like.

The object of the present invention is to improve the shortcomings of conventional cleaning agents as described above, to have excellent cleaning properties, safety, no environmental pollution, and excellent rinsability, and to be used for precision parts or their assembly processing process. An object of the present invention is to provide an aqueous cleaning composition for removing dirt components such as fats and oils, machine oil, cutting oil, grease, liquid crystal, and rosin-based flux existing on the solid surfaces of tools and tools.

[Means to solve the problem]

Under these circumstances, the present inventors conducted intensive research to solve the above problems, and as a result, they found that an aqueous cleaning composition containing a specific alkylene oxide compound in water satisfies the above conditions, and the present invention has been realized. completed.

That is, the present invention comprises the following components (A) and (B) (A)
The following general formulas (I), (II) and (II[)R'-O
n"O+R'0+-rY (I)It'-['
00÷ll”[])-1'[])-r-Y (H)
In formula c, R1 represents a hydrocarbon residue having 1 to 8 carbon atoms, and R
2 and R3 each represent an alkylene group having 2 to 4 carbon atoms, Y represents a hydrogen atom or an alkyl group or acyl group having 1 to 4 carbon atoms, m is 1 to 7, n is 0 to 3, and l is 0. ~
5. An alkylene oxide compound selected from the group consisting of compounds represented by
5-50% by weight (B) water
The present invention provides an aqueous cleaning composition for precision parts or tools containing 50 to 95% by weight.

The alkylene oxide compound as component (A) in the aqueous detergent composition of the present invention is represented by the general formula (I), (Ir) or (Iff).

In general formulas (I), (II) and (III), R' needs to be a hydrocarbon residue having 1 to 8 carbon atoms, particularly a hydrocarbon residue having 2 to 6 carbon atoms. It is preferable.

If R' is not a hydrocarbon residue, the affinity with organic stains such as flux and mineral oil will decrease, and if the number of carbon atoms in the hydrocarbon residue of R1 exceeds 8, the solubility in water will deteriorate. However, the viscosity of the cleaning liquid itself increases, making it unsuitable for cleaning precision parts.

Also, mountains are 1 to 7, n is O to 3, spears are O to 5, and p is 0 to
Must be an integer of 5. Also, a++n is 1
-10, and p+i is in the range of 0 to 10, but m+n is particularly preferably in the range of 2 to 4, and 1+p is in the range of 0 to 4.

When m+n is 0, the solubility in water is insufficient,
Furthermore, when m+n exceeds 11, the affinity for water becomes too strong and the cleaning performance for organic stains deteriorates.

Specific examples of the alkylene oxide compound as component (A) include alcohols having straight or branched alkyl groups such as methyl alcohol, ethyl alcohol, propyl alcohol, methyl alcohol, isobutyl alcohol, hexyl alcohol, and octyl alcohol. ; Phenols such as phenol and cresol; Alicyclic alcohols such as cyclohexanol; Fatty acids with linear or branched alkyl groups such as acetic acid, propionic acid, hexanoic acid, and isooctylic acid; Methacrylic acid, benzoic acid Organic carboxylic acids such as ethylamine, diethylamine, hexylamine, dibutylamine, octylamine, benzylamine, cyclohexylamine, etc.; straight chain, branched chain,
Examples include amines having aromatic or alicyclic hydrocarbon residues with alkylene (ethylene, propylene, butylene) oxide added alone or in combination; Examples include compounds methylated, ethylated, or butylated with alkyl chloride, etc., or esterified with acetic acid, propionic acid, etc.

The alkylene oxide compound as component (A) can be blended singly or in combination of two or more, and is used in the aqueous cleaning composition of the present invention for the purpose of maintaining detergency and ensuring its sustainability. 5 to 50% by weight (hereinafter simply "
%), preferably 10 to 40%. If the blending amount is less than 5%, the detergency and its sustainability will not be sufficient, and if the blending amount exceeds 50%, it will not be effective from the viewpoint of cost-by-performance.

The aqueous cleaning composition of the present invention has a water CB> of 50 to 95.
%, preferably 60 to 90%.

The aqueous cleaning composition of the present invention further contains an amine compound (
By using 0 in combination, cleaning performance can be improved.

The amine compound of component (C) has a nitrogen atom number of 1.
~5 and a molecular weight in the range of 50 to 300 is used. If the molecular weight is less than 50, the odor of the resulting cleaning composition will be too strong, and if the molecular weight exceeds 300, the cleaning performance improvement effect will be reduced.

Specific examples of such amine compounds as component (C) include:
Alkanolamines such as monoethanolamine, jetanolamine, triethanolamine, dimethylethanolamine, dibutylethanolamine, methylgetanolamine; Morpholines such as morpholine, ethylmorpholine; piperazine, triethyldiamine, pentamethyldiethylenetriamine, tetramethyl Examples include propylene diamine.

These amine compounds (C) are preferably blended in an amount such that the p)I of the aqueous cleaning composition of the present invention is 6.5 to 11. The pH of the aqueous cleaning composition of the present invention can be adjusted by using alkali metals such as sodium and potassium, and alkaline earth metals such as calcium, but considering the rust-prone properties and electrical properties when remaining ( It is preferable to use an amine compound as component C).

The detergency of the aqueous detergent composition of the present invention can be further increased by further incorporating component (D), a surfactant.

As the surfactant of component (D), anionic surfactant,
Any of cationic activators, nonionic activators, and amphoteric activators can be used.

More specifically, fatty acid salts, higher alcohol sulfate ester salts, liquid fatty oil sulfate ester salts, sulfates of aliphatic amines and aliphatic amides, fatty alcohol phosphate ester salts, sulfone salts of dibasic fatty acid esters, fatty acids Anionic activators such as amidosulfonates, alkylallylsulfonates, and formalin-condensed naphthalene sulfonates; cationic activators such as aliphatic amine salts, quaternary ammonium salts, alkylpyridinium salts; polyoxyalkylene alkyl ethyls,
polyoxyalkylene alkylphenol ethers,
Nonionic activators such as polyoxyalkylene alkylamines, polyoxyalkylene alkyl esters, sorbitan alkyl esters; or zwitterionic activators such as alkyl betaines, alkyldimethylamine oxides, alkylalanines, etc. etc. are listed as the main ones.

Note that polyoxyalkylene herein refers to a polymer of ethylene oxide, propylene oxide, or butylene oxide. Among these surfactants, especially on average 1
1LB 4 to 18 nonionic active agents exhibit excellent effects.

These (D) component surfactants are preferably blended in the aqueous cleaning composition of the present invention in an amount of 0.01 to 20%, particularly 0.5 to 10%. If the amount is less than 0.01%, no special effect will be produced by adding the surfactant, and even if the amount exceeds 20%, it will be difficult to obtain any additional effect.

In addition, the aqueous cleaning composition of the present invention may further contain chelating agents such as aminocarboxylic acid salts such as hydroxyethylimino diacetic acid and ethylenediaminetetraacetic acid, if necessary, within a range that does not impair the effects of the present invention. Compounds, preservatives, antioxidants, rust preventives, etc. can be added.

The aqueous cleaning agent of the present invention has a particularly excellent effect on cleaning precision parts and jigs and tools used in their assembly processing process.
Refers to precision mechanical parts, resin processed parts, optical parts, etc. Here, electronic components include, for example, printed wiring boards used in computers and their peripheral equipment, home appliances, communication equipment, OA equipment, and other electronic application equipment; ■ Contact members such as C lead frames, resistors, capacitor relays, etc. Hoop materials used in; ○A liquid crystal displays used in equipment, watches, computer equipment, toys, home appliances, etc.; video/audio recording/playback parts;
Magnetic recording parts used for related parts; Semiconductor materials such as silicon and ceramic wafers; Electrostrictive parts such as crystal resonators; CDs.

Refers to photoelectric conversion parts used in FDs, copying equipment, optical recording equipment, etc. Electrical parts include, for example, electric motor parts such as brushes, rotors, stators, housings, etc.; ticket issuing parts used in vending machines and various devices; coin inspection parts used in vending machines, cash dispensers, etc. Precision mechanical parts include, for example, bearings used in precision drive equipment, video recorders, etc., and machining parts such as carbide tips. Resin processed parts refer to precision resin processed parts used for cameras, automobiles, etc., for example. Further, optical parts include lenses used in cameras, glasses, optical instruments, etc., and other parts include glasses frames, watch cases, watch straps, etc.

In the present invention, the jigs and tools used in the assembly processing process are used to manufacture precision parts such as those shown in the various parts examples above.
Refers to jigs and tools used in various processes such as molding, processing, assembly, and finishing, as well as various equipment and parts that handle these precision parts.

The aqueous cleaning composition of the present invention exhibits suitable performance particularly for the above-mentioned printed wiring boards with residual flux. Precision products with a solid surface of a certain shape are adhered to, but are not limited to, various substances that interfere with subsequent processes such as various processing oils and fluxes during the assembly process, or various oil-based contaminants that degrade the characteristics of the product. The aqueous cleaning composition of the present invention can be applied to parts and tools.

When these contaminants are mainly organic oil stains, such as fats and oils 1, machine oil, cutting oil, grease, liquid crystal, and rosin flux, the aqueous cleaning composition of the present invention is particularly effective. Dirt mixed with metal powder, inorganic powder, water, etc. can be thoroughly washed and removed.

The aqueous cleaning composition of the present invention can be applied to a dipping method, an ultrasonic cleaning method,
It can be used in various cleaning methods such as a shaking method, a spray method, a steam cleaning method, a hand wiping method, and a water displacement drying method, and favorable results can be obtained.

When the cleaning agent of the present invention is used, for example, in the process of cleaning a printed wiring board to which flux has adhered, ultrasonic cleaning may be performed using, for example, an ultrasonic cleaning tank containing the aqueous cleaning composition of the present invention.

After washing, the aqueous detergent composition of the present invention can be easily removed with water or the like.

〔Example〕

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

Examples 1 to 14 and Comparative Examples 1 to 4 Cleaning compositions having the compositions shown in Table 1 were prepared, and their cleaning properties and flux removal properties were evaluated. The results are shown in Table 1.

(1) Cleanability test 70nonX 5 on a 150+++m steel test piece
Naphthenic mineral oil (40°C, 350
cst). This test piece was immersed in a cleaning solution kept at 40° C. and cleaned with ultrasonic waves for 5 minutes.

Then, it was immersed in ion-exchanged water at 30°C for 10 seconds, and after drying,
The cleanability was visually evaluated.

(Evaluation criteria) Cleanability ◎: Immediately clean on back surface ○: Almost no mineral oil residue on back surface △: Slight mineral oil residue on back surface ×: Mineral oil residue on surface (2) Flux removal test The printed wiring board on which the IC chip was mounted was subjected to flux treatment, and then soldered to prepare a test piece. This test piece was immersed in a cleaning solution maintained at 50°C (new solution: cleaning solution without flux contamination, degraded solution: cleaning solution with 5% flux contamination mixed in), and after ultrasonic cleaning for 3 minutes, 30℃ ion After rinsing with exchanged water and drying, the removability of slack from the printed wiring board was visually evaluated.

(Evaluation criteria) ◎: No flux residue, extremely high cleaning power ○: Almost no flux residue, great cleaning power △: Slight flux residue, but cleaning power ×: Flux residue, cleaning Poor strength <a) Note) (PO8), : Polyoxyethylene (FDP) I
, : Polyoxypropylene (POB) h: Polyoxybutylene n indicates the average value of the number of added moles.

〔Effect of the invention〕

As seen from Unegami, the aqueous cleaning composition of the present invention has excellent cleaning properties and deterioration resistance, and is also safe and free from environmental pollution, so it can be used for precision parts or jigs and tools used in the assembly process thereof. It can be advantageously used as a cleaning agent for similar products.

that's all

Claims (4)

[Claims] 1. The following components (A) and (B) (A) The following general formulas (I), (II) and (III) ▲ Numerical formula,
There are chemical formulas, tables, etc. ▼ (I) ▲ There are mathematical formulas, chemical formulas, tables, etc. ▼ (II) ▲ There are mathematical formulas, chemical formulas, tables, etc. ▼ (III) [In the formula, R^1 is a carbon number of 1 to 8 indicates a hydrocarbon residue,
R^2 and R^3 each represent an alkylene group having 2 to 4 carbon atoms, Y represents a hydrogen atom or an alkyl group or acyl group having 1 to 4 carbon atoms, m is 1 to 7, and n is 0 to 3. ,l
5 to 50% by weight of an alkylene oxide compound selected from the group consisting of compounds represented by the following formula: (B) 50 to 95% by weight of water Precision parts or jigs and tools Water-based cleaning composition for similar use. 2. 2. The aqueous cleaning composition according to claim 1, wherein R^1 is an aliphatic hydrocarbon residue having 2 to 6 carbon atoms, m+n is 2 to 4, and l+p is 4 or less. 3. The aqueous cleaning composition according to claim 1, further comprising the following component (C) (C) an amine compound having 1 to 5 nitrogen atoms and a molecular weight in the range of 50 to 300. 4. Furthermore, the next component (D) (D) Surfactant 0.01-20% by weight The aqueous cleaning composition according to claim 1 or 2, comprising: