JPH10114899A - Detergent composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a detergent which has not only excellent cleaning ability for a printed board and miniature parts, but also safety, by compounding a hydrocarbon solvent, a polyoxyalkylene dialkyl ether and a specific aromatic compound such as benzil alcohol. SOLUTION: This detergent composition comprises (A) a hydrocarbon solvent, (B) a polyoxyalkylene dialkyl ether of formula (I) (wherein, each of R<1> and R<2> is a 1-6C alkyl group or a 2-6C alkenyl group, (m) is 2 to 4, (n) is 1 to 4, and the groups indicated within () may be different one another), and (C) a monocyclic aromatic compound of formula (II) (wherein R<3> is H, a 1-3C alkyl group, a 2-3C alkenyl, (p) is 0 to 2, (q) is 2 to 4 and (r) is 0 to 4 and the groups indicated with in () may be different one another). With respect to (A), a hydrocarbon having 12 to 14 carbon atoms is used for maintaining low flamability and the detergency for an interstice. Particularly, a 12-14C monoolefin is preferred. As (B), use is made of a compound wherein the group indicated within () is oxy-ethylene or oxy-propylene. (C) is particularly benzil alcohol. A formulation comprising 12 to 20wt.% of (B) and 7 to 30wt.% of (C) is preferred. Addition of an amine compound to this detergent composition results in further enhancing the detergency.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a cleaning composition. More specifically, the present invention relates to a cleaning composition which is excellent in removing contaminants existing on surfaces of precision parts, jigs and the like, and has high fire safety.

[0002]

2. Description of the Related Art Conventionally, organic components such as solder flux, solder paste, liquid crystal, oil and fat, machine oil, cutting oil, grease, and the like, which are present on the surface of precision parts and jigs and tools used in an assembling process are mainly used. To remove the contaminants, a chlorine-based solvent such as trichloroethylene and tetrachloroethylene, a chlorofluorocarbon-based solvent such as trichlorotrifluoroethane, and an alkaline aqueous cleaning agent in which a surfactant and a builder are mixed with sodium orthosilicate and caustic soda are used. It is used.

[0003] However, chlorine-based solvents and chlorofluorocarbon-based solvents are both inferior in fire safety, toxicity, environmental pollution, and the like. In addition, when an alkaline aqueous detergent is used for precision parts, etc., it is difficult to clean. If it remains on the surface of an object, there is a disadvantage that it adversely affects plastic parts and the like.

In recent years, in the field of printed circuit boards for precision components,
As a new mounting method, a so-called BGA (ball grid arra
y) method and CSP (chip size package) method were developed,
The mounting density of precision parts is rapidly increasing. Along with this, the gap between precision parts has become even smaller, 1 mm or less, and the cleaning operation is becoming more difficult. In addition, the situation in which jigs and tools used in the assembling process become complicated and miniaturized, and a large number of parts must be cleaned at one time is increasing. Thus, for example,
It is becoming an extremely bad condition for cleaning that the gaps between components such as small electronic components, metal processed products such as bolts and nuts, and other small workpieces are narrowed and the components overlap each other.

[0005] For cleaning such components, glycol ether-based detergents and hydrocarbon-based solvents have been used as substitutes for CFC-based solvents.

However, when these glycol ether-based detergents and hydrocarbon-based solvents are used, it is difficult to sufficiently clean narrow portions of the gap, and it takes a long time to clean and increases the shower pressure. However, there is a drawback that parts must be adversely affected because ultrasonic waves must be applied strongly during cleaning. Further, glycol ether-based detergents have a disadvantage that they are inferior in cleaning properties of oil and fat stains, and hydrocarbon-based solvents have extremely limited types of stains such as fluxes that can be removed by washing.

Therefore, in recent years, detergents combining hydrocarbons and glycol ethers such as polyoxyalkylene glycol alkyl ethers have been proposed (JP-A-5-306481 and JP-A-5-306482).

However, none of the above-mentioned cleaning agents has a sufficient cleaning property for cleaning a narrow gap between components.

[0009]

SUMMARY OF THE INVENTION The present invention has been made in view of the above prior art, and has been applied to solder flux, solder paste, liquid crystal, oil and fat, machine oil and cutting oil of narrow gaps of precision parts and the like. It is a first object of the present invention to provide a detergent composition capable of quickly cleaning and removing dirt such as naphthenic mineral oil and grease used with low physical force.

It is a second object of the present invention to provide a detergent composition having excellent fire safety.

[0011]

The gist of the present invention is that (A)
A hydrocarbon solvent, (B) a general formula (I):

[0012]

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Wherein R ¹ and R ² are an alkyl group having 1 to 6 carbon atoms or an alkenyl group having 2 to 6 carbon atoms, m is an integer of 2 to 4, n is an integer of 1 to 4, n C _m H _2m Os may be the same or different), and (C) a compound represented by the general formula (I)
I):

[0014]

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(Wherein R ³ is a hydrogen atom, an alkyl group having 1 to 3 carbon atoms or an alkenyl group having 2 or 3 carbon atoms,
p is 0 or an integer of 1-2, q is an integer of 2-4, r is 0
Or an integer of 1 to 4, wherein r C _q H _2q Os may be the same or different, respectively. .

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION As described above, the cleaning composition of the present invention comprises (A) a hydrocarbon solvent, (B) a general formula (I):

[0017]

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Wherein R ¹ and R ² are an alkyl group having 1 to 6 carbon atoms or an alkenyl group having 2 to 6 carbon atoms, m is an integer of 2 to 4, n is an integer of 1 to 4, n C _m H _2m Os may be the same or different), and (C) a compound represented by the general formula (I)
I):

[0019]

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(Wherein R ³ is a hydrogen atom, an alkyl group having 1 to 3 carbon atoms or an alkenyl group having 2 or 3 carbon atoms,
p is 0 or an integer of 1-2, q is an integer of 2-4, r is 0
Or an integer of 1 to 4, and each of the r C _q H _2q Os may be the same or different.)

The hydrocarbon solvent used in the present invention is a component for sufficiently cleaning narrow gaps of precision parts.

The carbon number of the hydrocarbon solvent is preferably 10 or more, especially 12 or more in order to lower the flammability, and in order to sufficiently clean narrow gaps. It is preferably 18 or less, especially 14 or less. Particularly preferred carbon number is 12
~ 14. The kinematic viscosity at 25 ° C. is preferably 0.7 cSt or more, especially 1 cSt or more, in order to lower the flammability, and 5 cSt in order to sufficiently clean narrow gaps.
Hereinafter, it is particularly preferable that it is 3 cSt or less.
A particularly preferred kinematic viscosity is 1-3 cSt.

Representative examples of the hydrocarbon solvent include, for example, a linear or branched alkane having the above carbon number, and a linear or branched alkene having the above carbon number.

Specific examples of the hydrocarbon solvent include linear or branched alkanes such as decane, undecane, dodecane, tridecane, tetradecane, pentadecane, hexadecane, heptadecane and octadecane; decene, undecene, dodecene Linear or branched alkenes such as tridecene, tetradecene, pentadecene, hexadecene, heptacene and octadecene. These hydrocarbon solvents may be used alone or in combination of two or more. Among them, mono-olefins having 10 to 14 carbon atoms represented by decene, undecene, dodecene, tridecene and tetradecene are particularly excellent in detergency, and therefore can be suitably used in the present invention. is there. Further, monoolefins having 12 to 14 carbon atoms are particularly preferable in that flammability is further reduced and detergency is further improved.

The content of the hydrocarbon solvent in the detergent composition is at least 30% by weight, preferably at least 50% by weight, in order to sufficiently clean narrow gaps between precision parts. And preferably 80% by weight in order to improve the solubility to various stains.
Hereinafter, it is particularly preferable to be 70% by weight or less.

The polyoxyalkylene dialkyl ether compound used in the present invention is a component for sufficiently cleaning narrow gaps between precision parts and the like, similarly to the hydrocarbon-based solvent.

The polyoxyalkylene dialkyl ether compound has the general formula (I):

[0028]

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Wherein R ¹ and R ² are an alkyl group having 1 to 6 carbon atoms or an alkenyl group having 2 to 6 carbon atoms, m is an integer of 2 to 4, n is an integer of 1 to 4, n pieces of C _m H _2m O may be respectively identical or those can be expressed by different may be) used.

In the general formula (I), R ¹ and R
² is an alkyl group having 1 to 6 carbon atoms or an alkenyl group having 2 to 6 carbon atoms, respectively.

Representative examples of the alkyl group include a methyl group, an ethyl group, a propyl group, an isopropyl group, a butyl group, an isobutyl group, a pentyl group, an isopentyl group, a hexyl group and an isohexyl group.

Further, typical examples of the alkenyl group include a vinyl group, a propenyl group, an isopropenyl group, a butenyl group, an isobutenyl group, a pentenyl group, an isopentenyl group, a hexenyl group and an isohexenyl group.

Among the above R ¹ and R ² , one having 1 carbon atom
The alkyl groups of Nos. To 4 are particularly suitable for use in the present invention because they have low viscosity and excellent detergency.

In the above formula (I), m is an integer of 2 to 4, preferably 2 or 3. C _m H _2m
O is an oxyethylene group when m is 2,
When m is 3, it is an oxypropylene group.
n is an integer of 1 to 4, preferably 2 or 3. The n C _m H _2m Os may be the same or different.

Specific examples of the polyoxyalkylene dialkyl ether compound represented by the general formula (I) include, for example, diethylene glycol dimethyl ether,
Diethylene glycol methyl ethyl ether, diethylene glycol methyl propyl ether, diethylene glycol diethyl ether, diethylene glycol methyl butyl ether, diethylene glycol ethyl propyl ether, diethylene glycol methyl pentyl ether, diethylene glycol ethyl butyl ether, diethylene glycol dipropyl ether, diethylene glycol methyl hexyl ether, diethylene glycol ethyl pentyl ether, diethylene glycol propyl butyl ether , Diethylene glycol ethylhexyl ether, diethylene glycol propyl pentyl ether, diethylene glycol dibutyl ether; their corresponding triethylene glycol dialkyl ethers or tetra ethers Glycol dialkyl ether; dipropylene glycol dialkyl ethers corresponding to them, tripropylene glycol dialkyl ether or tetraethylene glycol dialkyl ether. Among these polyoxyalkylene dialkyl ether compounds, diethylene glycol methyl propyl ether, diethylene glycol diethyl ether, diethylene glycol methyl butyl ether, diethylene glycol ethyl propyl ether,
Diethylene glycol ethyl butyl ether, diethylene glycol dipropyl ether, diethylene glycol propyl butyl ether, diethylene glycol dibutyl ether, dipropylene glycol dimethyl ether, triethylene glycol dimethyl ether, etc. are excellent in detergency and low inflammability. It can be used.

The content of the polyoxyalkylene dialkyl ether compound represented by the general formula (I) in the detergent composition is set at 10 so that narrow gaps between precision parts can be sufficiently washed. Weight% or more,
It is preferably at least 12% by weight, and more preferably at most 50% by weight, especially at most 20% by weight, in order to improve the solubility to various stains.

The aromatic monocyclic compound used in the present invention is
It is a component for imparting solubility to various stains to the cleaning composition.

As described above, the aromatic monocyclic compound has the general formula (II):

[0039]

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(Wherein R ³ is a hydrogen atom, an alkyl group having 1 to 3 carbon atoms or an alkenyl group having 2 or 3 carbon atoms,
p is 0 or an integer of 1-2, q is an integer of 2-4, r is 0
Or an integer of 1 to 4, and r C _q H _2q Os may be the same or different).

In the above formula (II), R ³ is a hydrogen atom, an alkyl group having 1 to 3 carbon atoms or an alkenyl group having 2 or 3 carbon atoms.

The alkyl group includes a methyl group, an ethyl group, a propyl group and an isopropyl group.

The alkenyl group includes a vinyl group, a propenyl group and an isopropenyl group.

In the general formula (II), an aromatic monocyclic compound in which R ³ is a hydrogen atom is particularly suitable for use in the present invention because of its low viscosity and excellent detergency.

In the general formula (II), p is 0 or 1
It is an integer of 2, preferably 0 or 1. q is an integer of 2 to 4. q is preferably 2 or 3, and C _q H _2q O is an oxyethylene group when q is 2, and an oxypropylene group when q is 3. r is 0 or an integer of 1 to 4, preferably 0 or 1. The r C _q H _2q Os may be the same or different.

Specific examples of the aromatic monocyclic compound include:
For example, phenol, ethylene glycol phenyl ether, diethylene glycol phenyl ether, triethylene glycol phenyl ether, benzyl alcohol, ethylene glycol benzyl ether, diethylene glycol benzyl ether, triethylene glycol benzyl ether, methyl benzyl alcohol, ethyl benzyl alcohol, isopropyl benzyl alcohol, etc. can give. Among these, benzyl alcohol and ethylene glycol phenyl ether, particularly benzyl alcohol, are preferably used in the present invention because of their high solubility in various soils.

The content of the aromatic monocyclic compound in the detergent composition is set so as to impart solubility to various stains to the detergent composition, and the content of the hydrocarbon-based solvent and the general formula (I)
In order to improve the compatibility with the polyoxyalkylene dialkyl ether compound represented by the formula and to obtain a uniform detergent composition, the content is preferably 5% by weight or more, especially 7% by weight or more, and the obtained detergent composition 50% by weight or less to prevent the viscosity of the product from becoming too high
In particular, it is preferably at most 30% by weight.

In the present invention, it is preferable to use an amine compound in order to impart more excellent detergency to the obtained detergent composition by saponification.

Representative examples of the amine compound include an amine compound having 1 to 5 nitrogen atoms and a molecular weight of 50 to 300. The number of nitrogen atoms is 1 to
The reason why it is preferably set to 5 is to promote solubilization of dirt. Further, the molecular weight is preferably set to 50 or more because it is possible to suppress the odor of the obtained detergent composition, and it is preferable to set the molecular weight to 300 or less to further improve the detergency. Because you can.

Specific examples of the amine compound include alkanolamines such as monoethanolamine, diethanolamine, triethanolamine, dimethylethanolamine, dibutylethanolamine, aminoethylethanolamine, methylethanolamine and methyldiethanolamine; (2-ethylhexyloxy) propylamine, 3-ethoxypropylamine, 3
Alkoxypropylamines such as -methoxypropylamine; morpholines such as morpholine, methylmorpholine, ethylmorpholine and 3-aminopropylmorpholine;
Piperazine, triethyldiamine, pentamethyldiethylenetriamine, tetramethylpropylenediamine and the like can be mentioned. These amine compounds can be used alone or in combination of two or more. Further, in the present invention, as the amine compound, for example, a compound to which an alkylene oxide such as ethylene oxide, propylene oxide or butylene oxide has been added can be suitably used.

The content of the amine compound in the detergent composition is 0.1% by weight or more, preferably 0.5% by weight, in order to sufficiently impart detergency to the resulting detergent composition by saponification. % Or more, and preferably 5% by weight or less, particularly preferably 3% by weight or less from the viewpoint of imparting saponification action.

The detergent composition of the present invention may contain, if necessary, components usually used in detergents, such as a surfactant, hydroxyethylaminoacetic acid, and hydroxyethyl, as long as the object of the present invention is not impaired. A chelating compound such as an aminocarboxylate such as iminodiacetic acid and ethylenediaminetetraacetic acid, a preservative, a rust preventive, a defoaming agent such as silicone, an antioxidant, and the like may be appropriately compounded.

The detergent composition of the present invention may be used in a non-aqueous system, or may be used after being diluted with water to an appropriate concentration.

The water is not particularly limited as long as it does not inhibit the purpose of the cleaning composition of the present invention. Specific examples of such water include, for example, ultrapure water, pure water, ion-exchanged water, distilled water, and ordinary tap water. Also,
The amount of the water is not particularly limited, but is preferably 3 to 15 parts by weight, especially 5 to 12 parts by weight, based on 100 parts by weight of the detergent composition, from the viewpoint of fire safety and detergency. .

The kinematic viscosity of the cleaning composition of the present invention is 5 cSt or less, especially 3 at 25 ° C., so that narrow gaps in precision parts can be sufficiently cleaned.
It is preferably cSt or less. The kinematic viscosity at 25 ° C. is preferably 0.7 cSt or more, because the composition comprising a compound having a low molecular weight and a low kinematic viscosity has high flammability.

The cleaning composition of the present invention preferably has a flash point of 70 ° C. or higher, especially 80 ° C. or higher, in order to enhance fire safety. The flash point is
For example, by adjusting the types and amounts of the hydrocarbon solvent, the polyoxyalkylene dialkyl ether compound and the aromatic monocyclic compound, the desired flash point can be adjusted.

The cleaning composition of the present invention is applicable to stains mainly composed of organic substances. Examples of such organic-based dirt include solder flux, solder paste, liquid crystal, oil and fat, machine oil, cutting oil, grease, and the like. In particular, the cleaning composition of the present invention comprises:
It can be suitably used for cleaning solder flux, solder paste, liquid crystal, oil and fat, machine oil, cutting oil and the like that have entered a narrow gap of not more than mm.

Therefore, the cleaning composition of the present invention can be suitably used for removing dirt substances present on the surface of, for example, precision parts and jigs.

The method for cleaning using the cleaning composition of the present invention is not particularly limited. For example, after performing ultrasonic cleaning or immersion cleaning using the cleaning composition of the present invention,
The method of continuously performing the rinsing operation with a solvent or hot water is a method that can be preferably employed in the present invention because the washing can be performed efficiently. In addition to such a method, for example, a cleaning method such as a vibration method, a submerged method, or an air spray method is a method that can be suitably adopted in the present invention.

[0060]

EXAMPLES Next, the cleaning composition of the present invention will be described in more detail with reference to Examples, but the present invention is not limited to only these Examples.

Examples 1 to 19 and Comparative Examples 1 to 4 The components shown in Table 1 were mixed in the proportions shown in Table 1 to prepare detergent compositions.

Next, the cleaning composition obtained was examined for its ability to remove contaminants, and its physical properties, such as kinematic viscosity at 25 ° C. and flash point, according to the following methods. Table 2 shows the results.

(A) Removability of contaminants 20 mm × 25 mm × 1 mm (thickness) glass plate
A 0 μm spacer is provided, and another glass plate of the same size is placed on the spacer, and the gap between the two glass plates is 200 μm.
To produce a narrow pitch cell.

Next, after filling the gaps of the cells with the following contaminants, the cells were immersed in the obtained cleaning solution composition, and an ultrasonic cleaner (manufactured by Sharp Corporation, product number:
UT-305, condition: 35 kHz, 200 W / 8.6
Washing is performed at 40 ° C. for 5 minutes using L).

<Stained Substance> Flux When using a flux, baking is performed at 230 ° C. for 5 minutes. Flux A: BGA flux Flux B: BGA flux Flux C: Cream paste Naphthenic mineral oil Naphthenic mineral oil A: "Uniquench" (Nippon Oil Co., Ltd.)
Naphthenic mineral oil B: "Unicut Terami" (Nippon Oil Co., Ltd.)

Next, dirt residues on the glass plate of the cell and around the cell are observed using a magnifying glass (240 times) and evaluated based on the following evaluation criteria.

(Evaluation Criteria) 残渣: No residue of dirt substance ○: Little residue of dirt substance △: Slight residue of dirt substance ×: Many residue of dirt substance

(B) Kinematic viscosity at 25 ° C. Kinematic viscosity at 25 ° C. is measured using a Canon Fenske viscometer (manufactured by Kusano Scientific Instruments).

(C) Flash point Cleveland open cup (Cl) specified in JIS K 2265
eaveland Open Cup).

[0070]

[Table 1]

[0071]

[Table 2]

From the results shown in Table 2, Examples 1 to 19
Each of the cleaning compositions obtained in Example 1 has excellent removability of flux, naphthenic mineral oil and liquid crystal, and among them, Examples 1, 3, 5, 6, 8, 10, 11, and 1
Since the amine compound is used in the detergent composition obtained in 3, it can be seen that these compounds are particularly excellent in their removability.

Further, it can be seen that all of the cleaning compositions obtained in Examples 1 to 19 have a low kinematic viscosity, are excellent in fluidity, and have a high dissolution rate of dirt.

Further, since the cleaning compositions obtained in Examples 1 to 19 all have a flash point of 70 ° C. or higher, it can be seen that they have excellent safety against fires and the like.

[0075]

EFFECT OF THE INVENTION The cleaning composition of the present invention quickly removes dirt such as solder flux, solder paste, and naphthenic mineral oil used in machine oil and cutting oil in narrow gaps of precision parts and the like. And has an excellent effect of cleaning and removing. Among them, the detergent composition of the present invention using an amine compound has an effect of exhibiting particularly excellent detergency against these stains.

The cleaning composition of the present invention having a low viscosity of 5 cSt or less has excellent fluidity, and thus has an effect of quickly removing dirt.

Further, the cleaning composition of the present invention having a flash point of 70 ° C. or higher has safety against fire during storage and a low risk of ignition when heated and washed.
It has an effect of being excellent in safety against fire and the like.

Claims (7)

[Claims] (1) a hydrocarbon solvent, (B) a general formula (I): (Wherein, R ¹ and R ² each represent an alkyl group having 1 to 6 carbon atoms or an alkenyl group having 2 to 6 carbon atoms, and m represents 2 to 4
Integer, n is an integer of 1 to 4, n pieces of C _m H _2m O or may be respectively identical polyoxyalkylene alkyl ether compound represented by different may be), and (C) General formula (II): (Wherein, R ³ is a hydrogen atom, an alkyl group having 1 to 3 carbon atoms or an alkenyl group having 2 or 3 carbon atoms, p is 0 or an integer of 1 to 2, q is an integer of 2 to 4, r is 0 or 1-4
_Wherein r C _q H _2q Os may be the same or different, respectively.) 2. A hydrocarbon solvent of 30 to 80% by weight, a polyoxyalkylene dialkyl ether compound of 10 to 50%.
The cleaning composition according to claim 1, comprising 5% by weight and 5 to 50% by weight of an aromatic monocyclic compound. 3. The cleaning composition according to claim 1, further comprising (D) an amine compound. 4. The cleaning composition according to claim 3, wherein the amine compound has 1 to 5 nitrogen atoms and a molecular weight of 50 to 300. 5. The cleaning composition according to claim 3, wherein the content of the amine compound is 0.1 to 5% by weight. 6. The cleaning composition according to claim 1, which has a kinematic viscosity at 25 ° C. of 5 cSt or less. 7. A flash point of 70 ° C. or higher.
The cleaning composition according to any one of the above.