JP2002294287A - Detergent for electronic part - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a detergent for electronic parts which is used for removing organic substances, such as a liquid crystal, remaining on electronic parts, such as a liquid crystal panel, having minute gaps, is excellent in detergency and rinsability, and does not corrode a liquid crystal panel. SOLUTION: This detergent contains a specific salt comprising an ammonium cation and a phosphate anion and/or an organic acid anion and an anionic surfactant and/or a solubilizing assistant.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cleaning agent for electronic parts, and more particularly to a cleaning agent suitably used for removing liquid crystal remaining on a liquid crystal panel having a narrow gap.

[0002]

2. Description of the Related Art Until now, cleaning agents for electronic parts, especially for liquid crystal panels, include aqueous cleaning agents comprising a nonionic surfactant and water (JP-A-4-38100, etc.), and water-insoluble agents. Non-aqueous cleaning agent using solvent
No. 292699), and a quasi-aqueous detergent comprising a water-soluble solvent and water (Japanese Patent Application Laid-Open No. 4-170500) have been proposed.

[0003]

However, the gap between the liquid crystal panel substrates which can be cleaned with these cleaning agents is one.
When the gap is 2 to 5 μm, these cleaning agents cause poor cleaning and poor rinsing, and metal parts such as electrodes of the liquid crystal panel are easily eroded. The present invention
It is an object of the present invention to provide a cleaning agent for electronic parts having a narrow gap, particularly excellent in cleaning and rinsing properties of liquid crystal remaining on the liquid crystal panel, and which does not cause electrolytic corrosion on electrode portions of the liquid crystal panel after cleaning. .

[0004]

Means for Solving the Problems The present inventors have made intensive studies to achieve the above object, and as a result, have reached the present invention. That is, the present invention provides a salt (A) represented by the general formula (1) and an anionic surfactant (B) and / or an alcohol having a melting point of 20 ° C. or less, an alcohol having a carbon number of 6 to 26 and a melting point of 20 ° C. or less, and a carbon number of 6 to 6. 1 selected from the group consisting of 50 fatty acids
A cleaning agent for electronic parts, characterized by containing one or more solubilizing aids (C).

Embedded image [Wherein, R ¹ is a hydrocarbon group having 1 to 24 carbon atoms, R ² , R ³
And R ⁴ are H, a hydrocarbon group having 1 to 24 carbon atoms or a group represented by the general formula (2), wherein R ¹ , R ² , R ³ , and R ⁴ are bonded to each other to form a ring. You may. X ^n- represents an n-valent phosphate ester anion (u) and / or an organic acid anion (v), and n represents an integer of 1 to 4. ─ (R ⁵ O) _p ─H (2) wherein R ⁵ is an alkylene group having 2 to 4 carbon atoms, and p is 1 to
Represents an integer of 6. ]

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION In the general formula (1), R ¹ represents a linear or branched saturated or unsaturated hydrocarbon group having 1 to 24 (preferably 1 to 14) carbon atoms, an alicyclic hydrocarbon. And aromatic ring-containing hydrocarbon groups. Examples of the linear or branched hydrocarbon group include an alkyl group (methyl group, ethyl group, n- and i-propyl group, n-, i-
-And t-butyl, octyl, 2-ethylhexyl, decyl, octadecyl, docosyl and tetracosyl, etc., alkenyl (vinyl, propenyl, allyl, butenyl and oleyl)
Is mentioned. Examples of the alicyclic hydrocarbon group include a cycloalkyl group (cyclohexyl group, cyclodecyl group, cyclododecyl group, etc.) and a cycloalkenyl group (cyclohexenyl group, cyclooctenyl group, cyclododecenyl group, etc.)
And the like. Examples of the aromatic ring-containing hydrocarbon group include an aryl group (such as a phenyl group and a naphthyl group), an aralkyl group (such as a benzyl group and a phenethyl group), and an alkylaryl group (such as a methylphenyl group, an ethylphenyl group, and a nonylphenyl group). No. Among these hydrocarbon groups, alkyl groups and alkenyl groups are preferred from the viewpoint of detergency and rinsing properties.

R ² , R ³ and R ⁴ are hydrogen or a hydrocarbon group having 1 to 24 carbon atoms, and examples of the hydrocarbon group include those exemplified above for R ¹ . X ^n- includes an n-valent phosphate ester anion (u) and an organic acid anion (v), and n is an integer of 1 to 4 (preferably 1 or 2).

In the general formula (2), R ⁵ has 2 to 2 carbon atoms.
And an alkylene group having 4 or more carbon atoms (ethylene group, propylene group, butylene group, etc.). Of these, alkylene groups having 2 or 3 carbon atoms are preferable from the viewpoint of detergency. p is an integer of 1 to 6 (preferably 1 to 3).

The salt (A) in the present invention comprises an amine derivative cation (w) and a phosphate anion (u) and / or an organic acid anion (v) represented by X ^n- . As the amine derivative cation (w), at least one hydrocarbon group bonded to a nitrogen atom:
Ammonium cation.

A quaternary ammonium cation containing four hydrocarbon groups having 1 to 24 carbon atoms, trimethylalkylammonium [trimethylhexylammonium, trimethyloctylammonium, trimethyldecylammonium, trimethylcoconut alkyl (C8 to C25; the same applies hereinafter) Ammonium, trimethyltetradecylammonium, trimethyloctadecylammonium, etc.]; tributylalkylammonium [tributyloctylammonium, tributyldecylammonium, etc.]; dimethylethylalkylammonium [dimethylethylhexadecylammonium,
Dimethyl ethyl octadecyl ammonium, dimethyl ethyl coconut alkyl ammonium, etc.]; methyl diethyl alkyl ammonium [methyl diethyl hexadecyl ammonium, methyl diethyl coconut alkyl ammonium, etc.]; dimethyl alkyl benzyl ammonium [dimethyl decyl benzyl ammonium, dimethyl dodecyl benzyl ammonium, dimethyl] Coconut alkyl benzyl ammonium etc.]; dimethyl dialkyl ammonium [dimethyl dihexylammonium,
Dimethyldidodecylammonium etc.]; methyltrialkylammonium [methyltrioctylammonium, methyltridecylammonium etc.] Ammonium cation containing three hydrocarbon groups having 1 to 24 carbon atoms dimethylalkylammonium [dimethylhexylammonium, dimethyloctylammonium, Dimethyl coconut alkyl ammonium etc.]; diethyl alkyl ammonium [diethyl butyl ammonium, diethyl octyl ammonium, diethyl coconut alkyl ammonium etc.] An ammonium cation containing two hydrocarbon groups having 1 to 24 carbon atoms methyl alkyl ammonium [methylhexyl ammonium, Methyl octyl ammonium, methyl coconut alkyl ammonium, etc.]; ethyl alkyl ammonium Ammonium [ethyl butyl ammonium, ethyl octyl ammonium, ethyl coconut alkyl ammonium, etc.] Ammonium cation containing one hydrocarbon group having 1 to 24 carbon atoms Monoalkyl ammonium [methyl ammonium, ethyl ammonium, butyl ammonium, hexyl ammonium, octyl ammonium , Dodecyl ammonium, coconut alkyl ammonium, etc.] ammonium cation containing an oxyalkylene group (number of repeating units 1 to 6) dihydroxyethylhexylammonium, bis (2-
Among the above, such as hydroxyethoxyethyl) octylammonium, those which are preferable from the viewpoint of detergency and rinsing properties are more preferable. Preferred among them are trimethyldecylammonium, dimethyldidodecylammonium, and particularly preferred are trimethyloctylammonium, dimethyldioctylammonium.

The phosphate anion (u) includes those represented by the following general formula (3).

Embedded image In the general formula (3), R ⁶ is a hydrocarbon group having 4 to 18 (preferably 6 to 14) carbon atoms, R ⁷ is an alkylene group having 2 to 4 (preferably 2 or 3) carbons, and m is 0 to 0. 50
(Preferably 0 to 30), n represents 1 or 2 (preferably 1). Examples of R ⁶ include an alkyl group, an alkenyl group, a cycloalkyl group, an aryl group, an aralkyl group and an alkylaryl group. Among the hydrocarbon groups exemplified as R ¹ , those having 4 to 18 carbon atoms are exemplified. Examples of the phosphate constituting (u) include phosphates having a hydrocarbon group having 4 to 18 carbon atoms [n-butyl phosphate, n-hexyl phosphate, n-octyl phosphate, 2-ethylhexyl phosphate,
Dovananol 23 (Mitsubishi Chemical Corporation side chain ratio: about 20%, mixed alcohol having 12 or 13 carbon atoms) phosphate, tetradecyl phosphate, dodecyl phosphate, benzyl phosphate, etc.]; poly (n = 1 to 100) oxyalkylene alkyl ether phosphate [N-octyl alcohol ethylene oxide (hereinafter abbreviated as EO) 1
Monophosphate and / or diphosphate. These may be used alone or in combination of two or more. Among these, those having 4 to 18 carbon atoms are preferable from the viewpoint of detergency.
Among the phosphates having the following hydrocarbon groups, monophosphates such as n-butyl phosphate, n-hexyl phosphate, n-octyl phosphate and 2-ethylhexyl phosphate and / or di-n-butyl phosphate, di-n-hexyl phosphate , Ji-
diphosphates such as n-octyl phosphate and di-2-ethylhexyl phosphate. Poly (n
= 1 to 100) oxyalkylene alkyl ether phosphate, among which poly (n = 3 to 20) oxyalkylene alkyl ether monophosphate and poly (n = 3)
-20) oxyalkylene alkyl ether diphosphate.

Examples of the organic acid constituting the organic acid anion (v) include the following (v1) carboxylic acid, (v2) sulfonic acid, (v3) sulfinic acid, and (v4) phenol. The organic acid anion (v) is usually 1 to 4, preferably 1 to 2, and more preferably divalent. (V1) Carboxylic Acids Saturated or unsaturated aliphatic, alicyclic and aromatic carboxylic acids, and natural fatty acid fatty acids. As saturated or unsaturated aliphatic carboxylic acids (2-32 carbon atoms), monocarboxylic acids [heptanoic acid, octanoic acid, lauric acid, myristic acid, stearic acid, montanic acid, undecylenic acid, oleic acid, erucic acid, Oxycarboxylic acids (glycolic acid, lactic acid, gluconic acid, etc.), polycarboxylic acids [dicarboxylic acids [succinic acid, adipic acid,
Azelaic acid, sebacic acid, fumaric acid, itaconic acid, oxycarboxylic acid (glyceric acid, tartaric acid, malic acid, etc.); trivalent to tetravalent or higher polycarboxylic acid [1,2,4-butanetricarboxylic acid] , 1,2,5-
Hexanetricarboxylic acid, 1,3-dicarboxyl-2
-Methyl-2-methylenecarboxypropane, oxycarboxylic acid (eg, citric acid)], and saturated or unsaturated alicyclic carboxylic acids (with 6 to 50 carbon atoms) include monocarboxylic acids (such as cyclohexanecarboxylic acid). ), Polycarboxylic acids [dicarboxylic acid (1,4-cyclohexanedicarboxylic acid, dimer acid, etc.), trivalent to tetravalent or higher polycarboxylic acid (1,2,4-cyclohexanetricarboxylic acid, etc.)], aromatic Examples of the carboxylic acids (C 7 to C 16) include monocarboxylic acids (benzoic acid, pt-butylbenzoic acid, salicylic acid, 2-naphthalenecarboxylic acid, etc.), polycarboxylic acids [dicarboxylic acids (phthalic acid, isophthalic acid, Terephthalic acid, 2,6-naphthalenedicarboxylic acid, etc.) trivalent to tetravalent or higher polycarboxylic acids (1, , 4-benzenetricarboxylic acid, and pyromellitic acid)], as the natural fats and oils fatty acids, coconut oil fatty acid, palm oil fatty acid, such as corn oil fatty acids. These carboxylic acids may be used alone or in combination of two or more. Of the above carboxylic acids, polycarboxylic acids are preferred from the viewpoint of detergency and rinsing properties, and more preferred are aliphatic saturated dicarboxylic acids, particularly adipic acid and sebacic acid.

(V2) Sulfonic acid Aliphatic linear or branched sulfonic acid [1 to 4 carbon atoms (methanesulfonic acid, ethanesulfonic acid, propanesulfonic acid, etc.), 5 to 20 carbon atoms (hexanesulfonic acid, octanesulfonic acid, etc.) Acid, etc.)]; aromatic sulfonic acid [having 6 carbon atoms]
10 to 10 (benzenesulfonic acid, p-toluenesulfonic acid, xylenesulfonic acid, toluenedisulfonic acid, etc.), 11 to 26 carbon atoms (hexylbenzenesulfonic acid, dodecylbenzenesulfonic acid, dodecylbenzenedisulfonic acid, etc.)] and the like. (V3) Sulfinic acid Aliphatic linear or branched sulfinic acid [1 to 4 carbon atoms (methanesulfinic acid, ethanesulfinic acid, propanesulfinic acid, etc.), 5 to 20 carbon atoms (hexanesulfinic acid, octanesulfinic acid, dodecylsulfinic acid) Aromatic sulfinic acid [C6 to C10 (benzenesulfinic acid, p-toluenesulfinic acid, xylenesulfinic acid, etc.), C11 to C26 (hexylbenzenesulfinic acid, dodecylbenzenesulfinic acid, etc.)] Such. (V4) Phenol monovalent phenol [monocyclic (C6-20, for example, phenol, cresol, butylphenol, octylphenol, nonylphenol), polycyclic (C10-20,
Divalent phenol [monocyclic (C6 to C16, for example, hydroquinone, resorcinol), polycyclic (C13 to C20, for example, bisphenol F, bisphenol A, bisphenol S), etc.]; Trivalent to tetravalent or more phenols (monocyclic (C6 to C16, for example, 1,3,5-trihydroxybenzene), polycyclic (C13 to C20, for example 2,3,4-trihydroxy) Benzophenone). The organic acids (v1) to (v4) are one or two
Any of a combination of two or more of them may be used, and among the above organic acids, (v1) is preferred from the viewpoint of detergency and rinsing properties.

The salt (A) in the present invention is formed by an anion exchange reaction between the corresponding quaternary ammonium carbonate obtained by the reaction of an amine and a carbonic acid diester with an acidic phosphate or a carboxylic acid. The generated carbon dioxide gas is removed outside the system. Specifically, it can be manufactured by the following method or the like. For example, in the case of trimethyloctylammonium octyl phosphate, 1 mol of dimethyloctylamine and at least equimolar (1 to 1.4 mol) of dimethyl carbonate and methanol as a solvent are charged into an autoclave, and 1 to 20 k
By reacting at 60 to 150 ° C. under a pressure of g / cm ² , a methanol solution of trimethyloctyl ammonium methyl carbonate (30 to 80% by weight) is obtained. Separately, 3 moles of octyl alcohol and 1 mole of phosphoric anhydride are reacted at 60 to 70 ° C. to obtain mono-, di-, and mixed esters of octyl phosphoric acid. Then, octyl monophosphate, diphosphate, and mixed esters are mixed with trimethyloctyl ammonium methyl carbonate. A methanol solution is gradually added at 80 to 90 ° C., and the generated carbon dioxide and methanol are distilled off. Then, water is added, and after an anion exchange reaction is sufficiently performed, the mixture is further diluted with water to obtain an aqueous solution of trimethyloctyl ammonium octyl phosphate. If necessary, moisture can be removed to obtain a dried product.

The anionic surfactant (B) in the present invention
As a carboxylic acid or a salt thereof (B1), a sulfate salt (B2), a carboxymethylated salt (B3),
Sulfonate (B4) and phosphate ester salt (B5).

The carboxylic acid or its salt (B1) includes a saturated or unsaturated fatty acid having 8 to 22 carbon atoms or a salt thereof. Specifically, capric acid, lauric acid,
Mixtures of myristic acid, palmitic acid, stearic acid, arachidic acid, behenic acid, oleic acid, linoleic acid, ricinoleic acid and higher fatty acids obtained by saponifying coconut oil, palm kernel oil, rice bran oil, tallow, and the like. Salts include their sodium, potassium, ammonium, alkanolamines (such as mono-, di- and tri-ethanolamine, n- and i-propanolamine) and the like.

Examples of the sulfate (B2) include higher alcohol sulfates [sulfate esters of aliphatic alcohols having 8 to 18 carbon atoms, such as octyl alcohol sulfate, decyl alcohol sulfate, lauryl alcohol sulfate] , Stearyl alcohol sulfate, alcohol synthesized using a Ziegler catalyst (eg, ALFOL 1214: CONDE)
A), an alcohol synthesized by the oxo method (for example, dovanol 23, 25, 45: manufactured by Mitsubishi Chemical Corporation, tridecanol: manufactured by Kyowa Hakko Co., Ltd., oxocol 1213, 1215, 1415: manufactured by Nissan Chemical Industries, diamond Doll 115-L, 115H, 135: manufactured by Mitsubishi Chemical Corporation)
Sulfuric acid ester salt]; higher alkyl ether sulfate salt [EO1 to EO1 of aliphatic alcohol having 8 to 18 carbon atoms]
Sulfate adducts of 0 mol adducts, for example, sulfate adducts of lauryl alcohol EO 2 mol adducts, sulfate adducts of octyl alcohol EO 3 mol adducts]; sulfated oils [natural unsaturated fats or oils and sulfuric acid as it is Neutralized, for example, castor oil, peanut oil, olive oil, rapeseed oil, sodium, potassium, ammonium, alkanolamine (as described above) salts of sulfates such as tallow, sheep tallow, etc .; Sulfated and neutralized lower (C1-6) alcohol esters of saturated fatty acids, for example, sodium, potassium, ammonium and alkanolamines of sulfates such as butyl oleate and butyl ricinoleate (as described above)
Salts, etc.]; and sulfated olefins [C 12-18]
Obtained by sulfating and neutralizing olefins, for example, Teapol (manufactured by Shell).

Examples of the carboxymethylated salt (B3) include salts of carboxymethylated aliphatic alcohols having 8 to 16 carbon atoms [octyl alcohol carboxymethylated sodium salt, decyl alcohol carboxymethylated sodium salt, lauryl alcohol carboxymethyl]. Sodium salt, dovanol 23 sodium carboxymethylated salt, lidecanol carboxymethylated sodium salt, etc.]; and E of aliphatic alcohol having 8 to 16 carbon atoms
Salt of carboxymethylated product of O1 to 10 mol adduct [octyl alcohol EO 3 mol adduct carboxymethylated sodium salt, lauryl alcohol EO 4 mol adduct carboxymethylated sodium salt, dovanol 23EO3
Mole adduct carboxymethylated sodium salt, tridecanol EO 5 mol adduct carboxymethylated sodium salt, etc.].

Examples of the sulfonic acid salt (B4) include alkyl (8-24 carbon atoms) benzenesulfonic acid salt (such as sodium salt of dodecylbenzenesulfonic acid); alkyl (8-24 carbon atoms) naphthalenesulfonic acid salt (dodecylnaphthalenesulfonic acid) Acid sodium salt); sulfosuccinic acid diester salt (sodium, potassium, ammonium salt of di-2-ethylhexyl sulfosuccinate)
Alkanolamine salts); α-olefins (C12-18) sulfonates (such as 1-dodecenesulfonate); and Igepon T type. Among these, a sulfosuccinic acid diester salt, particularly a sodium salt of sulfosuccinic acid di-2-ethylhexyl ester, is preferred from the viewpoint of detergency.

Examples of the phosphate ester salt (B5) include higher alcohol (8 to 60 carbon atoms) phosphate ester salts such as monosodium lauryl alcohol phosphate monoester and sodium lauryl alcohol phosphate diester; Phosphoric acid ester salt of EO adduct [8 to 60 carbon atoms] oleyl alcohol EO 5 mol adduct phosphoric acid monoester disodium salt etc .; Phosphate ester salt of alkyl (4 to 60 carbon atoms) phenol EO [decylphenyl EO10 Phosphoric acid ester salt of a molar addition product] and the like. Among them, from the viewpoint of detergency, higher alcohol (8 to 60 carbon atoms) EO adduct phosphate ester salts, especially oleyl alcohol EO5
Molar adduct disodium phosphate monoester is preferred.

As the solubilizing aid (C) in the present invention, alcohols having a melting point of 20 ° C. or lower and 6 to 26 carbon atoms (C
1) and fatty acids (C2) having a melting point of 20 ° C. or lower and 6 to 50 carbon atoms. (C1) includes linear or branched aliphatic saturated monohydric alcohols (hexanol, heptanol, octanol, nonanol, decanol, undecanol, etc.); aliphatic unsaturated alcohols (2-hexen-1-ol, 2-heptene- 1-ol, 2-
Octen-1-ol, 2-dodecene-1-ol, 2
-Undecene-1-ol, 2-tetradecene-1-ol, 2-pentadecene-1-ol, 5-hexene-
1-ol, 6-hepten-1-ol, 8-nonene-
1-ol, 10-undecene-1-ol, 11-dodecene-1-ol, 12-tridecene-1-ol,
15-hexadecene-1-ol, oleyl alcohol, linoleyl alcohol, linolenyl alcohol, isostearyl alcohol, etc .; alicyclic alcohols (cyclononanol, cyclodecanol, cycloundecanol, etc.); aromatic alcohols ( benzyl alcohol,
Phenylethyl alcohol). (C
2) includes linear or branched saturated fatty acids (hexanoic acid, heptanoic acid, octanoic acid, nonanoic acid, 2-methylpentanoic acid, 4-ethylpentanoic acid, 6-propylnonanoic acid, 5-methyldodecanoic acid, 11 -Methyloctadecanoic acid, 9-octylheptadecanoic acid, 2,2-dimethyldodecanoic acid, 3,3-dimethyltetradecanoic acid, 13,1
Linear or branched unsaturated fatty acids (3-hexenoic acid, 6-heptenoic acid, 9-hendesenoic acid, 3-dodecenoic acid, 4-tetradecenoic acid, 9)
-Hexadecenoic acid, 11-octadecenoic acid, 2,5-dimethyl-2-heptadecaenoic acid, oleic acid, linoleic acid, linolenic acid and the like; and alicyclic carboxylic acids (dimer acid and the like). (C1) and (C2) may be used alone or in combination of two or more. (C1) and (C
Of the 2), (C1) is preferred from the viewpoint of odor, and more preferred are aliphatic saturated and unsaturated alcohols, particularly undecanol, oleyl alcohol and isostearyl alcohol.

The cleaning agent of the present invention can optionally contain a hydrophobic solvent (D) and a hydrophilic solvent (E). Examples of the hydrophobic solvent (D) include hydrocarbons (D1), esters (D2), ketones (D3), ethers (D4), amines (D5), and amides (D6) having a solubility in water at 20 ° C. of less than 3%. ), Alcohol (D7), glycol ether (D8) and the like.

The hydrocarbon (D1) has 8 to 2 carbon atoms.
0 chain or cyclic hydrocarbons. Examples of the chain hydrocarbon include saturated hydrocarbons (octane, nonane, decane, tridecane, tetradecane, pentadecane, hexadecane, isooctane, isononane, isodecane, isoundecane, isododecane, isotridecane, isotetradecane, isopentadecane, isohexadecane, etc.); And saturated hydrocarbons (octene, nonene, decene, undecene, dodecene, tridecene, tetradecene, pentadecene, hexadecene, etc.). Examples of the cyclic hydrocarbon include alicyclic hydrocarbons (such as isopropylcyclohexane, tetralin, and limonene); and aromatic hydrocarbons (such as alkyl (2 to 14 carbon atoms) benzene and dialkyl (total 2 to 14 carbon atoms) benzene). Can be
Of these, preferred are chain hydrocarbons, more preferred are saturated and unsaturated hydrocarbons, particularly those having 8 to 1 carbon atoms.
5 (octane, nonane, decane, dodecane, tridecane, tetradecane, pentadecane, octene, nonene,
Decene, undecene, dodecene, tridecene, tetradecene, pentadecene, hexadecene, etc.).

As the ester (D2), a compound having 4 to 1 carbon atoms is used.
6, mono- and di-carboxylic acid esters and lactones. Examples of the monocarboxylic acid component constituting the monocarboxylic acid ester include those having 1 to 18 carbon atoms among the monocarboxylic acids exemplified in the above (v1). Examples of the dicarboxylic acid component constituting the dicarboxylic acid ester include the aforementioned Among the dicarboxylic acids exemplified in (v1), those having 4 to 10 carbon atoms can be mentioned. As an alcohol component constituting the carboxylic acid ester, an aliphatic monohydric alcohol having 1 to 10 carbon atoms which may contain an ether group (methanol, ethanol, 2-ethylhexanol, methoxybutanol, ethoxyethanol, 3-methoxy -3-methylbutanol) and having 2 to 2 carbon atoms
And 10 aliphatic dihydric alcohols (such as ethylene glycol, propylene glycol, 1,3- or 1,4-butanediol, 1,6-hexanediol, and 1,10-decanediol). Specific examples of the monocarboxylic acid ester include methylcyclohexylacetic acid, 2
-Ethylhexylacetic acid, methoxybutylacetic acid, ethoxyethylacetic acid, butoxyethoxyethylacetic acid, 3-methoxy-3-methylbutylacetic acid, 1,6-diacetoxyhexane, methyl octylate, methyl laurate, methyl stearate, methyl benzoate And butyl benzoate. Specific examples of the dicarboxylic acid ester include dimethyl succinate, diethyl succinate, dimethyl adipate, diethyl adipate and the like.

As the lactone, γ- having 4 to 18 carbon atoms can be used.
Lactones (γ-butyrolactone, γ-caprolactone,
γ-caprylolactone, γ-laurolactone, γ-palmitolactone, γ-stealolactone, etc.);
Δ-lactone having 6 to 6 carbon atoms (δ-valerolactone, δ-caprolactone, etc.); ε-lactone having 6 to 10 carbon atoms (ε-lactone)
Caprolactone); and a macrocyclic lactone having 9 to 17 carbon atoms. Of these, monocarboxylic acid esters are preferable from the viewpoint of detergency, and dicarboxylic acid esters are more preferable, particularly dimethyl adipate and diethyl adipate.

The ketone (D3) has 8 to 20 carbon atoms.
Or a chain or cyclic ketone of Examples of the chain ketone include ethyl n-hexyl ketone, di-n-butyl ketone, di-n-hexyl ketone, di-n-octyl ketone, and methylheptenone. As the cyclic ketone, alicyclic ketones (dicyclohexyl ketone,
Acetophenone, propiophenone, valerophenone dihexyl-n-hexyl-cyclopenten-2-one,
1-1-methyl-4-isopropenyl-6-cyclohexen-2-one, 2-t-butyl-cyclohexanone and the like; and aromatic ketones (dibenzylphenone and the like). Among these, chain ketones are preferred from the viewpoint of detergency, and more preferred are di-n-hexyl ketone and di-n-octyl ketone.

The ether (D4) has 10 to 10 carbon atoms.
20 chain or cyclic ethers. Examples of the chain ether include n-amyl ether, n-hexyl ether, n-octyl ether, methyl-n-decyl ether, ethyl-n-decyl ether, ethyl-n-tetradecyl ether, and n-butyl dodecyl ether. No. Examples of the cyclic ether include alicyclic ethers (such as dicyclohexyl ether and n-butylphenyl ether); and aromatic ethers (such as n-hexylbenzyl ether and p-cresyl methyl ether). Of these, chain ethers are preferred from the viewpoint of detergency, and more preferred are n-hexyl ether and n-octyl ether.

The amine (D5) has 8 to 20 carbon atoms.
Acyclic or cyclic amines. Examples of the acyclic amine include tripropylamine, tri-n-butylamine, and tri-n-hexylamine. Examples of the cyclic amine include an alicyclic amine (such as diethylcyclohexylamine); an aromatic amine (such as diethylbenzylamine, N, N-dimethylaniline, and N, Nn-dibutylaniline). Of these, acyclic amines are preferable from the viewpoint of detergency, and tri-n-butylamine and tri-n-hexylamine are more preferable.

As the amide (D6), the amide (D6) has 6 to 16 carbon atoms.
Or a linear or cyclic amide of Hexaneamide, 2-ethylhexaneamide, n-
Decanamide and the like. As the cyclic amide,
Alicyclic amides (such as cyclohexaneamide, 4-methylhexaneamide, and 4-butylhexaneamide); and aromatic amides (such as acetanilide). Of these, chain amides are preferred from the viewpoint of detergency, and more preferred are hexaneamide and 2-ethylhexaneamide.

As the alcohol (D7), a compound having 6 to 6 carbon atoms is used.
14 linear or cyclic alcohols. Examples of the chain alcohol include n-hexanol, n-octanol, n-decanol, n-dodecanol, n-tetradecanol and the like. As the cyclic alcohol,
Alicyclic alcohols [[alkyl (C1-8)] cyclopentanol, [alkyl (C1-8)] cyclohexanol, etc.]; araliphatic alcohols [[alkyl (C1-8)] benzyl) Alcohol, [alkyl (1-8 carbon atoms)] cinnamyl alcohol and the like. Of these, chain alcohols are preferred from the viewpoint of detergency, and more preferred are n-hexanol, n-octanol and n-decanol.

The glycol ether (D8) includes carbitols having 1 to 8 or more carbon atoms in the alkyl group (diethylene glycol mono-n-hexyl ether, diethylene glycol mono-2-ethylhexyl ether, diethylene glycol monomethyl mono-n-hexyl). Carbitol acetate having an alkyl group having 1 to 8 or more carbon atoms (such as diethylene glycol mono-n-hexyl ether acetate); cellosolve (ethylene glycol mono-n-hexyl ether, ethylene glycol mono-2-ethylhexyl) Ether, ethylene glycol monobutyl mono-
cellosolve acetate (such as ethylene glycol mono-n-hexyl ether acetate); and other glycol ethers (such as triethylene glycol dibutyl ether and triethylene glycol mono-n-hexyl ether acetate).

(D1) to (D8) may be used alone or in combination of two or more. (D1) to (D8)
From the viewpoints of detergency and rinsing property, (D1) is preferable.
(D2), (D8), and more preferably (D1)
And (D8).

The boiling point of the above-mentioned hydrophobic solvent (D) is usually 1
It is 40 to 320 ° C, preferably 160 to 270 ° C.

As the hydrophilic solvent (E) in the present invention, a water-soluble glycol ether (E1) or a water-soluble amide (E1) having a solubility in water at 20 ° C. of 3% or more is used.
2) and the like.

Examples of the glycol ether (E1) include carbitols having an alkyl group having 1 to 5 carbon atoms, for example, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, diethylene glycol monopropyl ether, diethylene glycol monobutyl ether, diethylene glycol dimethyl ether, diethylene glycol diethyl ether. Carbitol acetates having 1 to 4 carbon atoms in the alkyl group, such as diethylene glycol monoethyl ether acetate;
Cellosolves having an alkyl group having 1 to 3 carbon atoms, such as ethylene glycol monomethyl ether and ethylene glycol monoethyl ether; cellosolve acetates having an alkyl group having 1 or 2 carbon atoms, such as ethylene glycol monomethyl Ether acetate, ethylene glycol monoethyl ether acetate, etc .; other glycol ethers such as propylene glycol monomethyl ether, dipropylene glycol monomethyl ether, triethylene glycol monomethyl ether, triethylene glycol monoethyl ether, 3-
Methyl-3-methoxy-1-butanol and the like; other glycol ether acetates such as propylene glycol monomethyl ether acetate, triethylene glycol monoethyl ether acetate, 3-methyl-
3-methoxy-1-butanol acetate and the like. Among the above compounds, carbitols, other glycol ethers, and other glycol ether acetates are preferred from the viewpoint of detergency and rinsing properties. Among carbitols, diethylene glycol monobutyl ether, diethylene glycol dimethyl ether, and diethylene glycol diethyl ether are preferred. Among other glycol ethers, 3-methyl-
3-Methoxy-1-butanol is preferred. Among other glycol ether acetates, 3-methyl-3-
Methoxy-1-butanol acetate is preferred.

Examples of the water-soluble amide (E2) include 2-pyrrolidone, N-alkyl (1 to 3 carbon atoms) -2-pyrrolidone and the like. Among these, N-ethyl-2-pyrrolidone is preferable from the viewpoint of detergency and rinsing property,
N-propyl-2-pyrrolidone, N-isopropyl-2
-Pyrrolidone, and more preferably N-methyl-2
-Pyrrolidone. (E1) and (E2) may be either one kind or a combination of two or more kinds.

The detergent of the present invention may further contain water, a nonionic surfactant, other additives, and the like, if necessary. As the nonionic surfactant, for example,
Alkylene oxide (2-4 carbon atoms) addition type nonionic surfactant [higher alcohol (8-18 carbon atoms), alkylphenol (10-24 carbon atoms), higher fatty acid (12-24 carbon atoms) or higher alkylamine ( 8 carbon atoms
24) directly added alkylene oxide (Mn 158 to 200,000); polyoxyalkylene glycol (Mn 150 to 6,000) obtained by adding alkylene oxide to glycol, and reacted with a higher fatty acid or the like. An alkylene oxide is added to an esterified product obtained by reacting a higher alcohol with a polyhydric alcohol (a dihydric to octahydric or higher polyhydric alcohol such as ethylene glycol, propylene glycol, glycerin, pentaerythritol, and sorbitan). (Mn 250 to 30,000), polyvalent (divalent to octavalent or higher) alcohol alkyl (C3 to C60)
A product obtained by adding an alkylene oxide to an ether (Mn
120 to 30,000)], and a polyhydric alcohol alkyl (C3 to C60) ether. The HLB of the surfactant is usually from 1.5 to 18, preferably from 3 to 16. Of these, preferred are alkylene oxide-added nonionic surfactants from the viewpoint of detergency, more preferred are alkylene oxide-added nonionic surfactants such as higher alcohols and alkylphenols, and particularly preferred are alkylene oxides (3 ~
20 mol) is an addition type nonionic surfactant.

Other additives include rust inhibitors (chromates, nitrites, higher fatty acid salts of amines, etc.), antioxidants [phenol compounds (2,6-di-t-butyl-4)
-Methylphenol, etc.), sulfur-containing compounds (such as dilaurylthiodipropionate), amine compounds (such as octylated diphenylamine), phosphorus compounds (such as triphenylphosphite), etc., and sequestering agents (sodium ethylenediaminetetraacetate, Sodium polyphosphate, sodium metaphosphate, etc.), and builders (sodium tripolyphosphate, sodium pyrophosphate, sodium silicate, etc.).

The content of (A) to (E) in the detergent of the present invention is preferably 0.5 to 95%, more preferably 1 to 80%, based on the total weight of the detergent. %, Especially 1.5 to 60%; the anionic surfactant (B) is preferably 0.5 to 95%, more preferably 1 to 70%, particularly 1.5 to 50%; solubilizing aid (C) Is preferably 0.5 to 30%, more preferably 1 to 20%, particularly 1.5 to 10%; the hydrophobic solvent (D) is usually 95% or less,
Preferably 10 to 90%, more preferably 15 to 85
%; The content of the hydrophilic solvent (E) is usually 85% or less, preferably 1%.
It is 0 to 75%, more preferably 20 to 65%.

In the present invention, the content of water, nonionic surfactant and other additives is usually 40% or less, preferably 0.5%, based on the total weight of the detergent. Water is usually 99% or less, preferably 1 to 40%, more preferably 3 to 25%; among other additives, the rust inhibitor is usually 20% or less, preferably 0.1 to 10%. %; Antioxidant is usually 5% or less, preferably 0.01 to 1%; sequestering agent is usually 20% or less, preferably 0.5 to 10%; builder is usually 20%.
Hereinafter, it is preferably 0.5 to 10%.

The detergent of the present invention comprises (A), (B) and / or (C), and if necessary, a hydrophobic solvent (D), a hydrophilic solvent (E), water, a nonionic surfactant And other additives can be added. Those composed of (A) and (B) have excellent cleaning stability at high temperature, those composed of (A) and (C) have excellent cleaning stability at low temperature, and (A), (B) and (B). The composition consisting of C) has the effect of having excellent cleaning stability at high and low temperatures. When the detergent of the present invention comprises (A) and (B), (A) is preferably 5% by weight.
To 95, more preferably 20 to 80, and (B) is preferably 5 to 95, more preferably 20 to 80. When the detergent of the present invention comprises (A) and (C),
(A) is 60 to 99, preferably 70 to 95, and (C) is 1 to 40, preferably 5 to 30. When the detergent of the present invention comprises (A), (B) and (C), (A) is 2 to 95, preferably 10 to 80,
(B) is 2 to 95, preferably 10 to 80, and (C) is 1 to 95.
-40, preferably 2-30.

The viscosity of the detergent of the present invention at 25 ° C. is as follows:
Normal 2~30mm ² / s, preferably 3~15mm ² /
s, more preferably 4 to 10 mm ² / s. The viscosity can be measured with a viscometer such as Ostwald or Ubbelohde.

The electronic component to which the cleaning agent of the present invention can be applied is not particularly limited, and examples thereof include a liquid crystal panel, a printed board, and a thermal head. In addition, as the organic substance to be cleaned, any liquid crystal includes TFT liquid crystal, STN liquid crystal, TN liquid crystal, and the like, and other organic substances adhering to electronic components and to be removed by cleaning. Among these, the cleaning agent of the present invention can be suitably used particularly for cleaning and removing liquid crystal remaining in a liquid crystal cell having a narrow gap. For example, a liquid crystal panel is an electronic component in which the above-mentioned liquid crystal is sealed in an empty cell made by laminating the periphery of two upper and lower glass substrates with a sealing material, but the liquid crystal is sealed in an empty cell. As a method of performing this, the opening is immersed in the liquid crystal in the injection chamber evacuated, then the liquid crystal is guided into the cell by returning the pressure to the atmospheric pressure, and the liquid crystal panel is formed by closing the opening. At this time, it is unavoidable that the liquid crystal enters a small gap outside the upper and lower glass substrates sealed, and must be removed by washing. If residues such as liquid crystal remain, insulation failure of the electrodes on the glass substrate occurs.

As a method for cleaning, for example, a liquid crystal residue having a narrow gap using the cleaning agent of the present invention, an ultrasonic cleaning, a shower cleaning, a oscillating cleaning method can be applied, and a plurality of methods can be combined. The washing temperature is usually 10
To 70 ° C, preferably about 15 to 60 ° C. The washing time is usually 3 to 60 minutes, preferably 5 to 30 minutes. The rinsing temperature with water is usually 10 to 90 ° C, preferably 1 to 90 ° C.
5 to 70 ° C. After rinsing, the liquid crystal cell
After being dried by heating at 0 ° C. for about 5 to 120 minutes, it becomes a clean liquid crystal cell electronic component.

[0044]

EXAMPLES The present invention will be described in detail with reference to the following Examples, but it should not be construed that the present invention is limited thereto. In the following, parts and% indicate parts by weight and% by weight, respectively. First, the composition of the detergent components, the cleaning test, and the corrosion test method used in Examples and Comparative Examples are shown.

1. Composition of detergent components A-1: trimethyloctylammonium / butyl phosphate salt A-2: trimethyloctylammonium / poly (n)
= 10) Oxyethylene cetyl ether phosphate (monophosphate: diphosphate = 1: 1) salt A-3: dimethyldodidecylammonium sebacate B4-1: sodium salt of di-2-ethylhexyl sulfosuccinate B5-1 : Oleyl alcohol EO 5 mol adduct phosphoric acid monoester disodium salt C1-1: oleyl alcohol C1-2: undecanol D1-1: dodecane D1-2: tetradecene D1-3: tetradecene D8-1: diethylene glycol monohexyl ether E1- 1: diethylene glycol monobutyl ether E1-2: diethylene glycol diethyl ether E1-3: 3-methyl 3-methoxy-1-butanol E1-4: 3-methyl 3-methoxy-1-butanol acetate E -1: N-methyl-2-pyrrolidone nonionic surfactant: higher alcohol (carbon number 16-1
8 mixture) of 9 mol EO adduct

2. Cleaning test A set of five liquid crystal panels (gap 4 μm) is filled with liquid crystal (TFT liquid crystal) in the gap, and allowed to stand at room temperature for 30 minutes. At 20 ° C. and 50 ° C. with each prepared detergent,
Ultrasonic cleaning was performed for 10 minutes, each was rinsed with pure water at 50 ° C. for 3 minutes, and the rinse was repeated twice under the same conditions. Next, it is dried in a circulating air dryer at 120 ° C. for 10 minutes. After washing and rinsing, the liquid crystal panel was observed with a polarizing microscope, and the washing and rinsing properties were evaluated in the following four stages. <Cleanability> Evaluation criteria 4: Gap portion was completely cleaned 3: Gap portion has a small amount of liquid crystal residue 2: Gap portion has a large amount of liquid crystal residue 1: Gap portion is hardly cleaned <Rinseability> Evaluation criteria 4: Very good rinsing property 3: Good rinsing property 2: Some washing liquid that cannot be rinsed 1: A large amount of cleaning liquid that cannot be rinsed

3. Corrosion test 90% of liquid crystal panel washed, rinsed and dried at 40 ° C
After being stored in an RH environment for 30 days, the wiring portion of the liquid crystal panel was observed with a microscope and evaluated in the following four steps. <Corrosion resistance> Evaluation criteria 4: No corrosion 3: Slightly corrosive 2: Slightly corrosive 1: Corrosive

Examples 1 to 11 and Comparative Examples 1 to 3 Tables 1 and 2 show the formulations of cleaning agents and the results of performance evaluation.

[0049]

[Table 1]

[0050]

[Table 2]

[0051]

The cleaning agent of the present invention has excellent detergency against organic substances such as liquid crystal remaining in a narrow gap, and also has excellent rinsing properties after cleaning. Further, since the cleaning agent of the present invention has excellent cleaning stability at low and high temperatures, corrosion due to poor cleaning and poor rinsing does not occur on electronic components such as liquid crystal panels, and extremely reliable electronic devices. Parts can be manufactured efficiently at low cost.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI theme coat ゛ (Reference) C11D 3/32 C11D 3/32 17/08 17/08 H05K 3/26 H05K 3/26 EF term (reference 4H003 AB22 AB39 AC08 AE05 AE10 BA12 DA15 ED02 ED03 ED28 ED29 ED30 ED32 FA15 FA21 FA23 5E343 AA02 AA22 CC22 CC50 CC52 CC55 EE02 GG20

Claims (7)

[Claims] 1. A salt (A) represented by the general formula (1) and an anionic surfactant (B) and / or a melting point of not higher than 20 ° C.
An electronic component comprising: one or more solubilizing agents (C) selected from the group consisting of alcohols having 6 to 26 carbon atoms and fatty acids having a melting point of 20 ° C. or lower and 6 to 50 carbon atoms. Cleaning agent. Embedded image [Wherein, R ¹ is a hydrocarbon group having 1 to 24 carbon atoms, R ² , R ³
And R ⁴ are H, a hydrocarbon group having 1 to 24 carbon atoms or a group represented by the general formula (2), wherein R ¹ , R ² , R ³ , and R ⁴ are bonded to each other to form a ring. You may. X ^n- represents an n-valent phosphate ester anion (u) and / or an organic acid anion (v), and n represents an integer of 1 to 4. ─ (R ⁵ O) _p ─H (2) wherein R ⁵ is an alkylene group having 2 to 4 carbon atoms, and p is 1 to
Represents an integer of 6. ] 2. The cleaning agent according to claim 1, wherein (B) is a di (alkyl or alkenyl) sulfosuccinic acid ester salt. 3. The cleaning agent according to claim 1, wherein (A) is a salt formed by an anion exchange reaction between the corresponding quaternary ammonium carbonate and an acidic phosphate or an organic acid. 4. The cleaning agent according to claim 1, further comprising one or more hydrophobic solvents (D) and / or one or more hydrophilic solvents (E). (D) is a hydrocarbon having 8 to 20 carbon atoms,
A hydrophobic solvent selected from the group consisting of esters having 4 to 16 carbon atoms and glycol ethers having 1 to 8 carbon atoms in the alkyl group, wherein (E) is selected from the group consisting of water-soluble glycol ethers and water-soluble amides The cleaning agent according to any one of claims 1 to 4, which is a hydrophilic solvent. 6. The cleaning agent according to claim 1, further comprising water, a nonionic surfactant, a rust inhibitor, an antioxidant, a sequestering agent and / or a builder. 7. The content of (A) is from 0.5 to 95%, the content of (B) is from 0.5 to 95% and the content of (C) is from 0.5 to 95% based on the total weight of the detergent. 1 to 30%.
6. The cleaning agent according to any one of 6.