JPH10168488A - Cleaner composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a leaner composition having low viscosity, being excellent in the ability to dissolve and wash off fats and oils, machine oils, cutting oils, greases, liquid crystals and rosin fluxes, being capable of removing greasy stains from precision parts elaborated and reduced in size, jigs and tools, stains of rosin soldering flux used in assembling electronic components and desirably used e.g. cleaning e.g. highly multi-pin and narrow-pin-pitch IC packages. SOLUTION: This composition contains at least one polyoxyalkylene dialkyl ether represented by the formula (R<1> and R<2> are each a 1-6C alkyl or a 2-6C alkenyl; m is an integer of 2-4; n is an integer of 1-4; provided than n CHO groups may be the same or different from each other) and an amine compound and has a kinematic viscosity of 5mm<2> /s or below.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a cleaning composition. More specifically, it is suitable for removing dirt such as grease, machine oil, cutting oil, grease, liquid crystal, and rosin-based flux on the solid surface of electronic parts, precision parts or the jigs and tools used in the assembly processing process. Cleaning compositions that can be used.

[0002]

2. Description of the Related Art Conventionally, as a cleaning agent used for removing stains mainly composed of organic substances such as oils and fats present on solid surfaces such as precision parts and jigs, a chlorofluorocarbon solvent such as trichlorotrifluoroethane or the like is used. Chlorinated solvents such as trichloroethylene, perchlorethylene, trichloroethane, and ethylene chloride are used.

However, chlorofluorocarbons and trichloroethane have been abolished at the end of 1995 because of the risk of destruction of the ozone layer in the atmosphere. Other chlorinated solvents should be used as far as possible from the viewpoint of toxicity and environmental pollution. It is preferable to avoid it.

Therefore, in recent years, as a substitute for a CFC-based solvent and a chlorine-based solvent, for example, a detergent composition containing 50% by weight or more of an alkylene oxide compound such as an ether, an ester or an amine (Japanese Patent Laid-Open No. 3-62895). Japanese Patent Application Laid-Open No. Hei 4 (1994), and a detergent composition containing 50% by weight or more of an alkylene oxide compound such as an ether, ester, or amine and 0.05 to 5% by weight of an amine compound.
-57897).

However, with the recent advancement of the technology for assembling electronic parts, the number of pins in the IC package has been increased, the pin pitch of the parts to be cleaned has been reduced to about 0.3 mm, and the gap between the IC chip and the substrate has been reduced to 50 μm or less. Although the cleaning composition has a high viscosity, it takes a long time to remove dirt from these electronic components, and the cleaning property in a narrow portion is poor. There is a disadvantage that it decreases.

In recent years, the situation in which the shapes of jigs and tools used in the assembling process are becoming more complicated and smaller, and moreover, a large number of parts must be cleaned at once has been increasing. For this reason, for example, the gap between components such as metal workpieces such as bolts and nuts and other small workpieces is narrowing, and the components are overlapping each other, which is becoming an extremely bad condition for cleaning.

Therefore, if the cleaning temperature is set to a high temperature of 80 ° C. or higher in order to lower the viscosity and physically improve the cleaning effect, there is a possibility that electronic components and members of the cleaning machine are adversely affected. .

Further, as a detergent for rosin-based solder flux, a detergent containing a polyoxyalkylene monoalkyl ether as an active ingredient (Japanese Patent Application Laid-Open No. 3-152197), a mixture of a polyoxyalkylene alkyl ether and a nonionic surfactant (JP-A-3-227400), a detergent containing a polyoxyalkylene dialkyl ether as an active ingredient and only water (JP-A-8-27485), and the like have been proposed. .

[0009] However, the detergent described in JP-A-3-152197 has a higher viscosity than that of a polyoxyalkylene monoalkyl ether used as an active ingredient and a dialkyl ether having a similar molecular weight. There are drawbacks that it takes a long time to clean the narrow part and the cleaning property is reduced.

The detergent described in JP-A-3-227400 has a nonionic surfactant content of 5% by weight in order to solubilize the flux in the water rinsing step.
When the above adjustment is made, the viscosity of the cleaning composition increases, the cleaning property in a narrow portion is reduced, and cleaning water and rinsing water are easily foamed. Is difficult to perform.

The detergent described in JP-A-8-27485 has the disadvantage that if dirt accumulates in the detergent, flux will precipitate in the water rinsing step, deteriorating the detergency.

[0012]

DISCLOSURE OF THE INVENTION The present invention has been made in view of the above-mentioned prior art, and has a low viscosity, a solubility of fats and oils, a machine oil, a cutting oil, a grease, a liquid crystal, and a rosin-based flux. Excellent cleanability, for example, complicated and miniaturized precision parts, oil stains on jigs and tools, printed wiring boards,
Cleaning agent suitable for removing dirt from rosin-based solder flux used for the assembly of electronic components such as ceramic substrates, ceramic packages, and plastic packages, and for cleaning IC packages and the like with an increased number of pins and reduced size. It is intended to provide a composition.

[0013]

That is, the gist of the present invention is as follows.
(1) General formula (I):

[0014]

Embedded image

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, respectively) and an amine compound, and have a kinematic viscosity at 25 ° C. A cleaning composition having a particle size of 5 mm ² / s or less, (2) a cleaning composition having the general formula (II):

[0016]

Embedded image

Wherein R ³ is an alkyl group having 1 to 8 carbon atoms or an alkenyl group having 2 to 8 carbon atoms, p is an integer of 2 to 4, q is an integer of 1 to 4, and q _{(The pH 2pO} may be the same or different.) The cleaning composition according to the above (1), comprising a polyoxyalkylene monoalkyl ether represented by the formula (1): At least one of the general formula (III):

[0018]

Embedded image

Wherein R ⁴ and R ⁵ are an alkyl group having 1 to 4 carbon atoms or an alkenyl group having 2 to 4 carbon atoms, the total number of carbon atoms of R ⁴ and R ⁵ is 5 to 8, and r is 2 or 3, and s represents an integer of 1 to 4, and s C _r H _2r Os may be the same or different.) Or the cleaning composition according to (2), (4)
The cleaning composition according to any one of the above (1) to (3), wherein the content of the polyoxyalkylene dialkyl ether represented by the general formula (I) is 40 to 99.9% by weight, (5)
The cleaning composition according to the above (4), wherein the content of the polyoxyalkylene dialkyl ether represented by the general formula (III) is 5 to 75% by weight, (6) the amine compound has 1 to 5 nitrogen atoms. The cleaning composition according to any one of the above (1) to (5), which has a molecular weight of 50 to 300, and (7) the content of the amine compound is from 0.1 to 1.
The cleaning composition according to any one of (1) to (6), which is 0% by weight, and (8) the cleaning composition according to any one of (1) to (7), whose flash point is 70 ° C or more. About.

[0020]

DETAILED DESCRIPTION OF THE INVENTION As described above, the cleaning composition of the present invention has the general formula (I):

[0021]

Embedded image

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 n C _m H _2m Os may be the same or different, respectively) and an amine compound, and have a kinematic viscosity at 25 ° C. of 5 cSt. (Mm in SI unit)
² / s, the same applies hereinafter).

The cleaning composition of the present invention has one major feature in that the polyoxyalkylene dialkyl ether represented by the general formula (I) is used.

Thus, in the present invention, the use of the polyoxyalkylene dialkyl ether makes it possible for the detergent composition of the present invention to have a low viscosity,
Moreover, it exhibits excellent cleaning properties.

In the polyoxyalkylenedialkyl ether represented by 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. The carbon number of R ¹ and R ² is set to improve the solubility in water and to prevent the viscosity of the obtained detergent composition from becoming too high.
It is set to 6 or less, preferably 4 or less. Also, m is 2 to 4
Is preferably 2 or 3 from the viewpoint of low viscosity and appropriate water solubility. N is 1
It is an integer of ４4, but is preferably 2 or 3 in order to ensure that the viscosity of the obtained detergent composition does not become too high and has an appropriate water solubility.

Specific examples of the polyoxyalkylene dialkyl ether 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, and 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 ethyl hexyl ether, diethylene glycol Call propyl pentyl ether, diethylene glycol dibutyl ether; triethylene glycol dialkyl ethers corresponding to them,
Dipropylene glycol dialkyl such as dipropylene glycol dibutyl ether such as dipropylene glycol methyl butyl ether, dipropylene glycol ethyl propyl ether, dipropylene glycol ethyl butyl ether, dipropylene glycol dipropyl ether, dipropylene glycol propyl butyl ether and dipropylene glycol dibutyl ether Ethers; tripropylene glycol dialkyl ethers and the like corresponding thereto. These polyoxyalkylene dialkyl ethers can be used alone or as a mixture of two or more. Among these polyoxyalkylene dialkyl ethers, they have excellent detergency and low flammability. Diethylene glycol propyl butyl ether, diethylene glycol methyl propyl ether, triethylene glycol dimethyl ether,
Preferred are triethylene glycol methyl ethyl ether, triethylene glycol methyl propyl ether, triethylene glycol methyl butyl ether, triethylene glycol diethyl ether, triethylene glycol ethyl propyl ether and dipropylene glycol methyl ethyl ether.

Among the polyoxyalkylene dialkyl ethers represented by the general formula (I), from the viewpoint of simultaneously satisfying rinsing properties and wastewater treatment properties which are properties opposite to the rinsing properties, the general formula (I) III):

[0028]

Embedded image

(Wherein R ⁴ and R ⁵ are an alkyl group having 1 to 4 carbon atoms or an alkenyl group having 2 to 4 carbon atoms, the total number of carbon atoms of R ⁴ and R ⁵ is 5 to 8, and r is 2 or 3, and s represents an integer of 1 to 4, and s C _r H _2r O may be the same or different.) It is preferable to use a polyoxyalkylene dialkyl ether represented by the following formula:

Here, the above-mentioned rinsing property means that the washing step (the step of washing at a temperature of about 60 to 70 ° C. using the cleaning composition of the present invention by ultrasonic or immersion, spraying or the like). In the pre-rinsing step and the rinsing step, the cleaning agent attached to the cleaning object is rinsed (rinsed) with warm water, water, or the like. In addition, even if the dirt can be removed in the cleaning step, if the cleaning agent cannot be removed in the pre-rinsing step or the rinsing step, the organic matter derived from the cleaning composition may remain in the washed material. Become.

The above-mentioned waste water treatment property means that when the detergent composition removed from the washing in a pre-rinse tank is heated at a temperature higher than the cloud point, the oil layer (organic substances derived from the detergent composition) is removed. It refers to the ability to separate into an aqueous layer. By reusing the water layer, the load of the rinse waste liquid, and hence the cost required for wastewater treatment, can be significantly reduced, and the environment can be prevented from being adversely affected.

In the general formula (III), s is an integer of from 1 to 4, and among them, from the viewpoint that the viscosity of the obtained detergent composition does not become too high and has a suitable water solubility,
Or, it is more preferably 3, and particularly preferably 2.

Specific examples of the polyoxyalkylene dialkyl ether represented by the general formula (III) include 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 and the like. Dialkyl ethers: dipropylene glycol such as dipropylene glycol methyl butyl ether, dipropylene glycol ethyl propyl ether, dipropylene glycol ethyl butyl ether, dipropylene glycol dipropyl ether, dipropylene glycol propyl butyl ether, and dipropylene glycol dibutyl ether Lumpur dialkyl ether.

The polyoxyalkylene dialkyl ether represented by the general formula (I) can be converted into an alcohol having 1 to 6 carbon atoms in the presence of a catalyst such as caustic alkali.
While heating, an alkylene oxide having 2 to 4 carbon atoms (ethylene oxide, propylene oxide or butylene oxide) is added in a liquid or gaseous state, and the resulting mixture is allowed to react with a polyoxyalkylene monoalkyl ether. In the presence of a caustic alkali. Polymerization of the alkylene oxide can be carried out by a random addition polymerization method in which two or more kinds are mixed and reacted, a block addition polymerization method in which an alkylene oxide is sequentially added, or the like.

The polyoxyalkylene dialkyl ether thus obtained can be used after purifying to remove unreacted substances and catalysts.

The content of the polyoxyalkylene dialkyl ether represented by the above general formula (I) in the detergent composition is to prevent the viscosity of the detergent composition from becoming too high and to improve the detergency. 40% by weight
As described above, the content is preferably at least 60% by weight, and preferably 99.9% by weight or less, especially 99.5% by weight or less in consideration of the content of the amine compound, and water is added. In this case, the content is preferably 95% by weight or less, especially 93% by weight or less.

The content of the polyoxyalkylene dialkyl represented by the general formula (III) in the detergent composition is preferably at least 5% by weight in order to enhance the drainage treatment property, and the rinsing property is enhanced. 75% by weight for
The following is preferred. Therefore, when the polyoxyalkylene dialkyl ether represented by the general formula (III) is used alone as the polyoxyalkylene dialkyl ether represented by the general formula (I), the polyoxyalkylene dialkyl ether represented by the general formula (III) is used. The content of the oxyalkylene dialkyl ether is 40 to 75% by weight,
Especially preferably, it is 60 to 75% by weight.

The present invention also has one significant feature in that the polyoxyalkylene dialkyl ether is used in combination with an amine compound.

As described above, since the polyoxyalkylene dialkyl ether and the amine compound are used in combination, the detergent composition of the present invention not only has excellent detergency but also has a Soil can be easily solubilized. Further, even if the compounding amount of the amine-based compound is small compared to the nonionic surfactant, an excellent cleaning effect is exhibited, so that the obtained cleaning composition can be reduced in viscosity, Accordingly, there is an advantage that foaming is difficult to occur even when a cleaning method such as an air spray method is employed.

The number of nitrogen atoms of the amine compound used in the present invention is 1 to 3 from the viewpoint that the solubilizing power of dirt is good.
It is preferably 5. Further, the molecular weight is preferably 50 or more in order to reduce the odor of the obtained detergent composition, and 300 or less in order to prevent the viscosity from becoming too high and to improve the detergency. Is preferred.

Specific examples of the amine compound include amino alcohols such as monoethanolamine, diethanolamine, triethanolamine, dimethylethanolamine, dibutylethanolamine, aminoethylethanolamine, methylethanolamine and methyldiethanolamine; Alkoxypropylamines such as 3- (2-ethylhexyloxy) propylamine, 3-ethoxypropylamine and 3-methoxypropylamine; morpholines such as morpholine, methylmorpholine, ethylmorpholine and 3-aminopropylmorpholine; piperazine and triethyl Diamine, pentamethyldiethylenetriamine, tetramethylpropylenediamine and the like can be mentioned. These amine compounds can be used alone or in combination of two or more. Also,
In the present invention, as the amine compound, for example, a compound obtained by adding an alkylene oxide such as ethylene oxide, propylene oxide, or butylene oxide, or a carbonate obtained by reacting the amine compound with carbonic acid is preferably used. it can. Among these amine compounds, those having a low viscosity, for example, dimethylethanolamine, dibutylethanolamine, and the like are preferable in order to reduce the viscosity of the obtained detergent composition.

The content of the amine compound in the detergent composition is 0.1% by weight or more in order to improve the detergency when used in combination with the polyoxyalkylene dialkyl ether represented by the general formula (I). In particular, the content is preferably 0.5% by weight or more, and the effect of solubilizing dirt is not changed even if it is added excessively, and from the viewpoint of reducing the viscosity of the detergent composition, it is especially 10% by weight or less. It is preferable that the content be 5% by weight or less.

The detergent composition of the present invention has the general formula (II) for dissolving various stains and further improving the detergency.

[0044]

Embedded image

Wherein R ³ is an alkyl group having 1 to 8 carbon atoms or an alkenyl group having 2 to 8 carbon atoms, p is an integer of 2 to 4, q is an integer of 1 to 4, and q _{(the pH} may be the same or different), and a solvent may be blended.

Representative examples of the polyoxyalkylene monoalkyl ether represented by the general formula (II) include, for example, ethylene glycol monohexyl ether, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, diethylene glycol monopropyl ether, diethylene glycol monobutyl ether, Diethylene glycol monohexyl ether;
Triethylene glycol monomethyl ether, triethylene glycol monoethyl ether, triethylene glycol monopropyl ether, triethylene glycol monobutyl ether, diethylene glycol monohexyl ether; and propylene glycol monoalkyl ether corresponding thereto. These polyoxyalkylene monoalkyl ethers can be used alone or
A mixture of more than one species can be used.

Among these polyoxyalkylene monoalkyl ethers, diethylene glycol monohexyl ether and diethylene glycol monobutyl ether are preferable because of their excellent washing properties and water rinsing properties.

Representative examples of the solvent include benzyl alcohol, phenol, furfuryl alcohol, tetrahydrofurfuryl alcohol, N-methyl-2-pyrrolidone, N, N-dimethylacetamide and the like. These solvents can be used alone or in combination of two or more.

When the amounts of the polyoxyalkylene monoalkyl ether represented by the general formula (II) and the solvent are too large, the viscosity of the cleaning composition of the present invention becomes too high. It is preferable to adjust the content in the composition to be 35% by weight or less.
When the polyoxyalkylene monoalkyl ether represented by the general formula (II) and the solvent are used, the content of these compounds in the detergent composition of the present invention is 10% by weight or more, preferably 20% by weight or more. It is preferable to adjust so that

The cleaning composition of the present invention may optionally contain
A nonionic surfactant having 10 or more carbon atoms and having lipophilicity can be added from the viewpoint of improving the washing property and the water rinsing property.

Specific examples of the nonionic surfactant include, for example, polyoxyalkylene monoalkyl ether, polyoxyalkylene alkyl phenyl ether,
Examples include polyoxyalkylene alkyl fatty acid esters, polyoxyalkylene allyl phenyl ether, polyoxyalkylene sorbitan fatty acid esters, polyoxyalkylene alkylamines, and sorbitan fatty acid esters. Among them, those having an average HLB of 4 to 15, for example, polyoxyalkylene monoalkyl ether, polyoxyalkylene alkyl phenyl ether, etc., exhibit particularly excellent detergency and water rinsing property. Which can be suitably used.

The amount of the nonionic surfactant added is such that the kinematic viscosity at 25 ° C. of the cleaning composition of the present invention is 5 mm ^2.
/ S as long as it does not exceed / s, and there is no particular limitation.
Usually, the amount of the nonionic surfactant added is preferably adjusted so as to be contained in the cleaning composition of the present invention in an amount of 5% by weight or less, particularly preferably 3% by weight or less. In addition, in order to sufficiently develop detergency and water rinsing property by adding the nonionic surfactant, the amount of the nonionic surfactant to be added is determined in the cleaning composition of the present invention. It is preferably adjusted to contain 0.1% by weight or more, especially 0.5% by weight or more.

The detergent composition of the present invention may further contain other surfactants and defoamers such as silicone, if necessary, as long as the object of the present invention is not impaired.

The cleaning composition of the present invention comprises a polyoxyalkylene dialkyl ether represented by the general formula (I) and an amine compound, and if necessary, a compound represented by the general formula (I)
It contains a polyoxyalkylene monoalkyl ether represented by the formula (I), a solvent, a surfactant such as a nonionic surfactant, and an antifoaming agent such as silicone. If necessary, water is used as a balance. Be blended.

The water is not particularly limited, but usually, purified water, pure water, city water, ion-exchanged water and the like can be used.

The kinematic viscosity of the cleaning composition of the present invention is 5 ° C. at 25 ° C. in order to improve the solubility of dirt, shorten the cleaning time, and exhibit excellent cleaning properties.
It is adjusted by adjusting the amount of the polyoxyalkylene dialkyl ether so as to be not more than mm ² / s, preferably not more than 3.5 mm ² / s.

The detergent composition of the present invention preferably eliminates the need for explosion-proof treatment of the washing machine, enhances the safety against fire during storage, and eliminates the danger of ignition during heating and washing.

From this viewpoint, the flash point of the cleaning composition of the present invention is preferably 70 ° C. or higher, more preferably 100 ° C. or higher.

The cleaning composition of the present invention may have a flash point lower than 70 ° C. depending on its composition. In such a case, usually 5 parts of water is added to the cleaning composition of the present invention. ~ 2
If the content is about 0% by weight, the flash point can be 70 ° C. or higher. In addition, when the flash point of the cleaning composition of the present invention exceeds 100 ° C., it can be made non-hazardous by, for example, containing about 5 to 20% by weight of water.

The cleaning composition according to the present invention can be used for oils and fats, machine oils, cutting oils, greases, liquid crystals, rosin-based fluxes, etc. existing on the surface of electronic parts, precision parts or jigs and tools used for assembling and processing the same. It can be suitably used for removing dirt.

The method for cleaning using the cleaning composition of the present invention is not particularly limited. For example, ultrasonic cleaning or immersion cleaning using the cleaning composition of the present invention may be carried out at 60 to 70 times.
The method in which the washing is carried out at a temperature of about ° C and finally the operation of continuously rinsing with a solvent, hot water, water or the like is a method which can be preferably used in the present invention since the washing can be carried out efficiently. In addition to the above method, in the present invention, a cleaning method such as a vibration method, a submerged spray method, and an air spray method can be employed. In the first rinsing step (pre-rinsing step) to be performed after the cleaning, the cleaning agent composition is heated from the cleaning step to a temperature higher than the cloud point to separate the aqueous layer separated from oil-water. Reuse is preferred.

[0062]

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 17 and Comparative Examples 1 to 9 The components shown in Tables 1 and 2 were mixed in the proportions shown in Tables 1 and 2,
A cleaning composition was prepared.

Next, the physical properties of the obtained detergent composition are as follows:
Kinematic viscosity at 25 ° C, flash point, flux solubility,
Detergency and rinsing properties were examined based on the following methods.
Table 3 shows the results.

(A) Kinematic Viscosity at 25 ° C. Kinematic viscosity at 25 ° C. is measured using a Canon Fenske viscometer (manufactured by Kusano Scientific Instruments Co., Ltd., capillary viscometer).

(B) Flash point Cleveland open cup (Cl) specified in JIS K 2265
eaveland Open Cup). Table 3
Among them, “> 100” means that the measurement of the flash point was impossible due to the boiling of water before the flash point could be measured.

(C) Flux solubility: 20 mm × 25 mm × 1 mm (thickness)
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 gap between the cells with a flux (SPT-OZ-63-177F, manufactured by Senju Metal Co., Ltd.), 23
Bake at 0 ° C. for 5 minutes to prepare a test cell.

The obtained cell is immersed in a cleaning composition having the composition shown in Tables 1 and 2 at 60 ° C. for 30 minutes. At the time of immersion, no external stress such as agitation is intentionally applied to the detergent composition in order to examine the detergency with only the detergent composition.

Next, the cell was taken out of the cleaning composition,
Using a magnifier (10
Times).

(D) Detergency A 10 cm square ceramic chip is mounted on a 5 mm square IC chip via a solder ball provided on the substrate so that a gap between the IC chip and the substrate is 50 μm. The cleaning of the flux adhering to the connection part of the substrate and its periphery is performed using an air spray cleaning machine under the following cleaning conditions.

(Cleaning conditions) Cleaning agent tank: 2 tanks (washing temperature: 50 ° C.) Rinse: 3 tanks 2 city water tanks + 1 ion-exchanged water tank (washing temperature: room temperature) Spray pressure: 3 kg / cm ² (full cone Nozzle), distance between substrate and nozzle is 10cm Cleaning tact: 2 minutes (cleaning time per tank)

After the cleaning, all the IC chips are peeled off, and the appearance of the substrate is visually observed and evaluated based on the following evaluation criteria.

(Evaluation Criteria) A: No flux residue. ：: There are 1 to 3 flux residues. Δ: There are 4 to 10 flux residues. ×: Flux residue is present in 11 or more places.

(E) Detergency 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 naphthenic mineral oil into the gaps of the cells, the cells were immersed in the obtained cleaning liquid composition, and an ultrasonic cleaning machine (manufactured by Sharp Corp., product number: UT-3)
05, condition: 35 kHz, 200 W / 8.6 L) for 5 minutes at 40 ° C.

Next, dirt residues on the glass plate of the cell and around the cell are visually observed using a magnifying glass (× 10), and evaluated based on the following evaluation criteria.

(Evaluation Criteria) A: No residue of contaminants was found. ：: There are 1 to 3 residues of contaminants. Δ: There are 4 to 10 residues of contaminated substances. ×: Residues of contaminants are present in 11 or more places.

(F) Rinsing The liquid temperature of the obtained detergent composition was adjusted to 60 ° C., and a printed board (10 cm × 20 cm ²⁾ was sprayed at a spray pressure of 3 kg / cm ^2.
m, weight 100 g) and the nozzle is washed with an air spray (full cone nozzle) for 2 minutes on the printed circuit board so that the distance between the nozzle and the nozzle becomes 10 cm. The weight of the printed circuit board after washing is measured, and the initial weight of the printed circuit board (100
g) is subtracted from the weight of the printed circuit board after cleaning, and the “carry-in amount” of the cleaning composition from the cleaning tank to the pre-rinse tank is measured.

Next, ion-exchanged water at room temperature was sprayed onto the washed printed circuit board at a spray pressure of 3 kg / cm ^{2 so} that the distance between the printed circuit board and the nozzle was 10 cm. After pre-rinsing with a full cone nozzle, the operation is repeated once more to perform rinsing.

After rinsing, the printed circuit board was left at room temperature for 2 minutes, and then the printed circuit board was blown at a constant-temperature dryer (trade name).
The product was placed in Toyo Seisakusho, product number: FC-610) and dried at 80 ° C. for 20 minutes. Thereafter, the weight of the printed circuit board after drying was measured, and the initial weight of the printed circuit board (100 g) was measured.
The weight of the printed circuit board after drying is subtracted from the above to determine the “adhesion amount” of the cleaning composition that cannot be rinsed.

From the above results, the formula: [rinse rate] = [carry-in amount-adhered amount] ÷ [carry-in amount] × 10
The rinsing rate is determined based on 0, and the evaluation is performed based on the following evaluation criteria.

(Evaluation Criteria) 良好: Very good rinsing property (Rinse rate is 90% or more) ：: Good rinsing property (Rinse rate is 75% or more and less than 90%) Δ: Insufficient rinsing property (Rinse rate is poor) ×: Poor rinsing properties (rinse rate less than 50%)

In Tables 1 to 3, each compound means the following. [Polyoxyalkylene dialkyl ether] Diethylene glycol dimethyl ether: kinematic viscosity at 25 ° C: 1.1 mm ² / s, flash point: 5
6 ° C. Diethylene glycol methyl butyl ether: Kinematic viscosity at 25 ° C .: 1.7 mm ² / s, flash point: 1
02 ° C. diethylene glycol diethyl ether: kinematic viscosity at 25 ° C .: 1.4 mm ² / s, flash point: 7
5 ° C. Diethylene glycol isopropyl butyl ether: Kinematic viscosity at 25 ° C .: 2.4 mm ² / s, flash point: 1
15 ° C. triethylene glycol dimethyl ether: kinematic viscosity at 25 ° C .: 2.0 mm ² / s, flash point: 1
18 ° C. Triethylene glycol methyl isopropyl ether: Kinematic viscosity at 25 ° C .: 2.6 mm ² / s, flash point: 1
27 ° C. Triethylene glycol methyl isobutyl ether: Kinematic viscosity at 25 ° C .: 3.0 mm ² / s, flash point: 1
32 ° C. dipropylene glycol methyl ethyl ether: kinematic viscosity at 25 ° C .: 1.6 mm ² / s, flash point: 7
9 ° C. Diethylene glycol ethyl butyl ether: Kinematic viscosity at 25 ° C .: 2.3 mm ² / s, flash point: 1
12 ° C. Diethylene glycol dibutyl ether: Kinematic viscosity at 25 ° C .: 2.4 mm ² / s, flash point: 1
28 ° C

[Amine Compound] Methyldiethanolamine: Kinematic viscosity at 25 ° C .: 101 mm ² / s, flash point: 1
40 ° C. dibutylethanolamine: kinematic viscosity at 25 ° C .: 8 mm ² / s, flash point: 104
C. Methylethanolamine: Kinematic viscosity at 25 ° C .: 13 mm ² / s, flash point: 74
° C

[Other Compounds] C ₁₀ H ₂₁ (C ₂ H ₄ O) ₂ C ₂ H ₅ : Kinematic viscosity at 25 ° C .: 8.5 mm ² / s, flash point: 2
10 ° C. C ₆ H ₁₃ (C ₂ H ₄ O) ₅ C ₃ H ₇ : Kinematic viscosity at 25 ° C _. : 9.6 mm ² / s, flash point: 2
30 ° C. C ₈ H ₁₆ (C ₂ H ₄ O) ₂ CH ₃ : Kinematic viscosity at 25 ° C _. : 3.0 mm ² / s, flash point: 1
48 ° C. C ₄ H ₉ (C ₂ H ₄ O) ₂ H: kinematic viscosity at 25 ° C .: 5.2 mm ² / s, flash point: 1
20 ° C. C ₆ H ₁₃ (C ₂ H ₄ O) ₂ H: kinematic viscosity at 25 ° C .: 7.1 mm ² / s, flash point: 1
41 ° C. Benzyl alcohol: Kinematic viscosity at 25 ° C .: 5.2 mm ² / s, flash point: 9
4 ° C. Polyoxyethylene nonylphenyl ether: Kinematic viscosity at 25 ° C .: 120 mm ² / s, HLB: 1
2 Polyoxyethylene higher alcohol ether (carbon number of higher alcohol: 12 to 14): Kinematic viscosity at 25 ° C .: 40 mm ² / s, HLB: 1
0.5

[0087]

[Table 1]

[0088]

[Table 2]

[0089]

[Table 3]

From the results shown in Table 3, Examples 1 to 17
Each of the cleaning compositions obtained in (1) has a low viscosity and therefore has excellent fluidity, and is a compact and complicated precision part, jigs and tools, a narrowed liquid crystal panel, and a multi-pin structure. It can be seen that it can be suitably used for cleaning IC packages and the like that have become narrower.

Further, the cleaning compositions obtained in Examples 1 to 17 are all excellent in flux solubility and cleaning properties. Therefore, for example, printed circuit boards, ceramic substrates, It can be seen that the rosin flux is suitably used for removing dirt from a rosin solder flux used for assembling electronic components such as a ceramic package and a plastic package.

In addition, the cleaning compositions obtained in Examples 1 to 17 all have a flash point of 70 ° C. or higher, indicating that they have excellent safety against fires and the like.

Further, it can be seen that all of the cleaning compositions obtained in Examples 1 to 17 have excellent rinsing properties.

Experimental Example Using the cleaning compositions obtained in Examples 1 to 17 and Comparative Examples 1 to 9, the drainage treatment properties were examined in accordance with the following method. Table 4 shows the results.

[Wastewater treatment property (oil-water separation property)] As a pre-rinse solution, a 5% aqueous solution of a detergent composition is prepared, and heated at 60 ° C for 20 minutes. When heated, it separates into an aqueous layer and an oil layer (detergent) by cloud point development. TO of this water layer
From the C value and the TOC value of the aqueous solution before separation, the formula: [separation rate (%)] = [TOC value of aqueous solution before separation × weight of aqueous solution before separation−TOC value of aqueous layer after separation × after separation] Of the aqueous layer of the aqueous solution] ÷ [TOC value of aqueous solution before separation × weight of aqueous solution before separation] × 100, and the evaluation is performed based on the following evaluation criteria. The larger the separation rate, the better the drainage treatment property.

[0096] The TOC is an abbreviation of "Total Organic Carbon" which indicates total organic carbon.
Carbon contained in organic matter in water.

In the TOC, a sample is made slightly acidic, a purge gas is passed therethrough to remove inorganic carbon, a certain amount of this sample is put into a combustion section, and carbon dioxide generated by burning organic substances is converted into non-dispersed infrared rays. It is determined by measuring with a gas analyzer.

(Evaluation Criteria) A: Very good wastewater treatment (separation rate is 60% or more) B: Good wastewater treatment (separation rate is 30% or more and less than 60%) C: Slightly insufficient wastewater treatment (Separation rate is 10% or more 29
%) D: Insufficient wastewater treatment (separation rate is less than 10%)

[0099]

[Table 4]

From the results shown in Table 4, Examples 1 to 17 were obtained.
Among them, the cleaning compositions obtained in Examples 13 to 17 contain the polyoxyalkylene dialkyl ether represented by the general formula (III) in the range of 5 to 75% by weight. It turns out that it is what was very excellent in processability.

[0101]

The cleaning composition of the present invention has a low viscosity and is excellent in fluidity, so that it can be used for miniaturized and complicated precision parts, oil stains on jigs and tools, and a narrowed liquid crystal. ICs with liquid crystal stains on the panel, or with more pins and smaller size
It can be suitably used for cleaning dirt such as rosin-based flux such as a package.

Further, the detergent composition of the present invention is excellent in solubility of rosin flux, oil and fat, machine oil, cutting oil, grease, liquid crystal and the like, and also excellent in detergency. Dirt of rosin-based solder flux used for the assembly of electronic components such as printed wiring boards, ceramic substrates, ceramic packages and plastic packages, miniaturized and complicated precision parts, oil stains on jigs and tools, and narrowed liquid crystals The liquid crystal stain on the panel can be removed in a short time, and even when the cleaning is performed by the spray cleaning method in the air, the cleaning liquid and the water rinsing liquid are not easily foamed, so that the cleaning can be easily performed. This has the effect.

Further, the cleaning composition of the present invention has the general formula
When the polyoxyalkylene dialkyl ether represented by the formula (III) is contained in the range of 5 to 75% by weight, the effect of further improving the wastewater treatment property is exhibited.

Claims (8)

[Claims] 1. A compound of the 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 1-4, and at least one polyoxyalkylene alkyl ether represented by n C _m H _2m O may be the or different may be the same), amine A cleaning composition comprising a base compound and having a kinematic viscosity at 25 ° C. of 5 mm ² / s or less. 2. A compound of the general formula (II): (Wherein, R ³ is an alkyl group having 1 to 8 carbon atoms or an alkenyl group having 2 to 8 carbon atoms, p is an integer of 2 to 4, q is 1 to 4)
Of an integer, q number of C _p H _2p O in detergent composition according to claim 1, wherein each contains a polyoxyalkylene monoalkyl ether represented by may be different may be the same). 3. The method according to claim 1, wherein at least one of the polyoxyalkylene dialkyl ethers has the general formula (III): (Wherein R ⁴ and R ⁵ are an alkyl group having 1 to 4 carbon atoms or an alkenyl group having 2 to 4 carbon atoms, respectively, R ⁴ and R ⁵
Is 5 to 8, r is 2 or 3, and s is 1 to
The cleaning composition according to claim 1 or 2, wherein the composition is a polyoxyalkylene dialkyl ether represented by an integer of 4 and s C _r H _2r Os may be the same or different. 4. The polyoxyalkylene dialkyl ether represented by the general formula (I) has a content of 40 to 99.9.
The cleaning composition according to any one of claims 1 to 3, which is% by weight. 5. The polyoxyalkylene dialkyl ether represented by the general formula (III) has a content of 5 to 75% by weight.
The cleaning composition according to claim 4, which is: 6. The amine compound according to claim 1, wherein the amine compound has 1 to 5 nitrogen atoms and has a molecular weight of 50 to 300.
A cleaning composition according to any one of claims 1 to 5. 7. The content of the amine compound is 0.1 to 10
The cleaning composition according to any one of claims 1 to 6, which is in terms of% by weight. 8. The flash point is 70 ° C. or higher.
The cleaning composition according to any one of the above.