TW201333185A - Washing agent composition and washing method using same - Google Patents

Abstract

The purpose of the present invention is to provide a non-flammable washing agent composition which has high washing performance against stains including a machining oil and a flux, does not require the use of any other rinsing solution such as pure water, enables an object washed with the washing agent composition to be dried directly, can be re-used repeatedly through the collection by distillation or the like, and does not undergo phase separation and therefore enables washing in a steady manner. A non-flammable washing agent composition characterized by comprising water, diethylene glycol diethyl ether and a water-soluble solvent and having a cloud point of 30 DEG C or higher and lower than 100 DEG C.

Description

Detergent composition and cleaning method using the same

The present invention relates to a detergent composition comprising water, diethylene glycol diethyl ether and a water-soluble solvent, and a cleaning method using the detergent composition.

More specifically, in the various industrial fields such as automobiles, machinery, precision machinery, motors, electronics, etc., the cleaning power of the processing oil or the flux adhered to the processed parts and the like is good and has good. A dry non-flammable detergent composition and a cleaning method using the detergent composition.

In various industrial fields, in order to remove dirt adhering to metal parts, electronic parts, and semiconductor parts, a halogen-based solvent, a hydrocarbon-based detergent, a glycol ether-based detergent, a water-based detergent, and a quasi-aqueous system are used. Various detergents such as detergents.

However, the chlorine-based solvent is highly harmful to the human body or the environment, and is subject to many regulations and the like, and there is a problem that it is not easy to handle. Since hydrocarbon-based detergents or glycol ethers are flammable, it is necessary to make the cleaning equipment an explosion-proof specification, or to provide equipment measures such as fire prevention equipment, and, as prescribed by the fire protection law, The greater the volume of processing, the greater the need for adequate management. Aqueous detergent or quasi-aqueous detergent is not flammable, Therefore, it is not necessary to be an explosion-proof device. However, in these detergents, a non-volatile component such as a surfactant is blended. Therefore, after washing, it is necessary to rinse with pure water or the like. These drainage treatments require a large amount of equipment or equipment. Further, since recycling by distillation or the like cannot be performed, there are many problems such as liquid management or regular exchange of the detergent and the rinsing agent become complicated.

In order to solve these problems, it is proposed to be a non-chlorinated non-flammable detergent which does not contain a surfactant (see, for example, Patent Documents 1 to 5). However, even in any of them, the solubility of the oil component is lacking. The detergency is insufficient, and the performance required for all drying properties, recyclability, and the like cannot be satisfied.

[Previous Technical Literature] [Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open No. Hei 8-283973

[Patent Document 2] Japanese Patent Laid-Open Publication No. Hei 9-255995

[Patent Document 3] Japanese Patent Laid-Open No. 11-19986

[Patent Document 4] Japanese Patent Laid-Open Publication No. 2004-238442

[Patent Document 5] Japanese Patent Laid-Open Publication No. 2004-107561

SUMMARY OF THE INVENTION An object of the present invention is to provide a rinsing liquid which can improve the cleansing property of a process oil or a flux, and which does not require pure water or the like and which can be directly dried after washing and can be recovered by distillation. Wait The non-flammable detergent composition which can be reused and reused without repeated phase separation can be subjected to stable washing.

The present inventors have repeatedly conducted various reviews in order to solve the above problems, and as a result, it has been surprisingly found that a certain solvent composition can reduce the solubility of the oil component even if the water is blended in order to eliminate the ignitability. Even if the water concentration of the non-priming solution is maintained, the solubility of the oil component necessary for washing the parts and the like can be maintained, so that the present invention can be completed.

That is, the detergent composition of the present invention is a non-priming detergent composition characterized by comprising water, diethylene glycol diethyl ether and a water-soluble solvent, and clouding (clouding) Point) is 30 ° C or more and 100 ° C is not full.

Hereinafter, the present invention will be described in more detail.

The water of the detergent composition of the present invention is not particularly limited as long as it has a function of eliminating the flash point of the detergent composition, and it is preferable to use a small amount of impurities for the influence of parts or a washing machine or It is a case where the influence on the finishing quality after washing or the like is small, such as distilled water or ion-exchanged water.

Here, the non-priming property is judged by the Cleveland open flash point measurement method (JIS K2265).

The diethylene glycol diethyl ether of the detergent composition of the present invention has low harmfulness and is excellent in drying property. When this water is added, it dissolves at room temperature and becomes a homogeneous solution. When heating, the water system is phased. The cloud point is shown by the amount of water combined and less than about 30 ° C. Further, when a water-soluble solvent is added, the cloud point rises while increasing the solubility of the oil component, indicating good detergency. In addition, when the amount of addition of the water-soluble solvent is increased and the cloud point is 100° C. or more, the solubility of the oil component is insufficient, and the detergency is also deteriorated. The solvent which does not contain diethylene glycol diethyl ether is a problem in which the washing property and the washing unevenness are caused by the addition of water and the flash point is eliminated.

The water-soluble solvent of the detergent composition of the present invention is not particularly limited as long as it is a water-soluble solvent, and is a water-soluble solvent which is soluble in water even at a temperature of about 30 ° C or higher. Since the drying ratio is deteriorated due to the mixing ratio, the boiling point is preferably 210 ° C or lower, and examples thereof include ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, and ethylene glycol single. Propyl ether, ethylene glycol monobutyl ether, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, diethylene glycol monopropyl ether, propylene glycol monomethyl ether, propylene glycol Glycol ethers such as monoethyl ether, propylene glycol monopropyl ether, dipropylene glycol monomethyl ether, dipropylene glycol monoethyl ether; ethylene glycol, diethylene glycol, propylene glycol, hexanediol, and different Ethylene glycols such as pentadiene hexanediol; methoxybutanol such as 3-methoxy-1-butanol and 3-methyl-3-methoxy-1-butanol; a lactate such as an ester or ethyl lactate; a cyclic ether alcohol such as tetrahydrofurfuryl alcohol or decyl alcohol; or γ-butyrolactone. These may be used alone or in combination of two or more.

Even in the above-mentioned water-soluble solvent, propylene glycol, diethylene glycol monoethyl ether, dipropylene glycol monomethyl ether, 3-methyl-3-methoxy group having a boiling point of 170 ° C or more and 210 ° C or less 1-butanol and diethylene glycol methyl ethyl ether are also due to changes in the composition of diethylene glycol diethyl ether Less, therefore, it is desirable, particularly preferably propylene glycol, diethylene glycol monoethyl ether or dipropylene glycol monomethyl ether having a flash point higher than diethylene glycol diethyl ether.

The detergent composition of the present invention has a cloud point of 30 ° C or more and 100 ° C or less, and further improves the solubility of the oil component. Therefore, it is particularly preferably 50 ° C or more and 90 ° C or less.

Further, the term "cloud point" as used in the present invention means a temperature at which a transparent solution is turbid due to a change in temperature, and is similar to a phenomenon due to an aqueous solution of a nonionic surfactant, and means that the solvent is separated at the temperature of the solution. The predominant phase and the water-based phase, the transparent solution begins to produce turbid temperatures.

The water, the diethylene glycol diethyl ether and the water-soluble solvent of the detergent composition of the present invention are effective in starting to exert the intended detergent composition by cultivating all the components, in particular, It is an ideal composition for washing which is suitable for the inclusion of the oil component such as the processing oil or the flux. In other words, the solubility of the water component and the diethylene glycol diethylene ether or the combination of only water and a water-soluble solvent to form a non-priming composition oil component is low, and sufficient washing cannot be obtained. Sex. Further, only a combination of diethylene glycol diethyl ether and a water-soluble solvent is used as a flammable solution.

In view of the fact that the ratio of the detergent composition of the present invention is such that the detergency and the ignitability are lost, the water system is preferably 5% by volume or more and 30% by volume or less, and particularly preferably 10% by volume or more and 25% by volume or less. From the viewpoint of the solubility of the oil component and the non-combustible composition, the diethylene glycol diethyl ether is preferably 40% by volume or more and 90% by volume. The amount is preferably 5% or less, particularly preferably 50% by volume or more and 80% by volume or less. From the viewpoint of the solubility of the cloud point and the oil component, the water-soluble solvent is preferably 1% by volume or more and 40% by volume or less, and particularly preferably 5% by volume or more and 30% by volume or less.

The detergent composition of the present invention may further contain other polyol derivatives, esters, ethers and the like insofar as the properties of the composition are not impaired. In addition, it may also contain an oxidation inhibitor such as 2,6-di-tert-butyl-p-cresol (BHT), thymol, catechol, etc., an amine alcohol, an alkylamine, a benzotriazole Corrosion inhibitors and rust inhibitors such as iron, copper and zinc such as azoles and benzothiazoles.

The detergent composition of the present invention contains water, diethylene glycol diethyl ether and a water-soluble solvent, and the total content thereof is preferably 80% by volume or more, more preferably 95% by volume or more, or may be 100% by volume.

The detergent composition of the present invention does not contain a nonvolatile substance such as a surfactant, and is composed of a component which is easily volatilized. Therefore, other rinse liquid is not required, and it can be directly dried. The washed matter after washing may be subjected to a drying method using a conventional detergent such as warm air drying, suction drying, spin drying, vacuum drying or the like.

The drying temperature of the washed object after washing is preferably 50° C. or higher and 120° C. or lower, and the drying time is preferably 10 seconds or longer and 1 hour or shorter, more preferably 30 seconds or longer and 0.5 hours or shorter.

Further, after washing, the rinsing may be carried out by washing with a low boiling point solvent such as water or isopropyl alcohol, or may be dried. The detergent composition of the present invention is water-soluble, so that even a complicated shape of the washed matter can be borrowed Rinsing with water can reduce the amount of detergent released to the atmosphere when it is dry. Further, the detergent dissolved in these rinse liquids can be recovered and reused by distillation or phase separation.

The detergent composition of the present invention can be used for washing liquids which are contaminated by the treatment of oil or the like by a batch or continuous type of distillation machine without causing deterioration in composition or cleaning performance. Separate and recover the dirt components and use them repeatedly. Further, the distillation machine to be used is not particularly limited, and a vacuum (reduced pressure) distillation machine is usually preferred.

Further, the detergent composition of the present invention is added to a weak solvent for dirt such as water, and phase separation can be performed on the dissolved dirt by washing, and the separated dirt can be removed by a water separator or the like. The oil-water separation system can combine the oil-water separation method using the difference in specific gravity with the separation accuracy of the oil component, the oil-water separation method which is efficiently separated by the coalescer, and the filter or the ultrafiltration membrane. The separation method or the like is suitably used, and the separated liquid system can recover the detergent by distillation or phase separation.

The detergent composition of the present invention may be applied to the removal of ink, resist, polishing or the like in addition to the dirt of the processing oil or the flux.

The washing method for washing the parts or the like to which any one of the processing oil and the flux is applied by using the detergent composition of the present invention is not particularly limited, and for example, ultrasonic cleaning, jet cleaning, and impregnation can be used. The washing, the shaking washing, the spin washing, the spray washing, the jet washing, the vacuum washing method, and the like can be used alone or in combination of several types in consideration of the required cleanliness or the required time.

The use of the detergent composition of the present invention for the attachment of processing oil and assistance The temperature at which the components of any of the fluxes are washed is preferably 0 ° C or more and 90 ° C or less, more preferably 10 ° C or more and 70 ° C or less. Further, the washing time is preferably 1 second or longer and 1 hour or shorter, more preferably 10 seconds or longer and 0.5 hours or shorter.

The detergent composition of the present invention can be used in various industrial fields such as automobiles, machinery, precision machinery, motors, electronics, etc., and has good detergency for processing oil adhered to treated parts and the like, and does not require other rinsing. After the washing, the liquid can be directly dried, and can be repeatedly reused by distillation or the like, and can be non-ignited and can be washed safely.

In the following, the present invention will be described in more detail by way of examples, but the invention is not limited to these examples.

<Measurement of cloud point>

In the glass container, the test liquid was added, stirred, and gradually heated. When the temperature of each test liquid rose by about 1 ° C, the appearance of the liquid was observed, and the temperature of white turbidity was used as a cloud point.

<Detergency test>

The bolt (M8×20) of the water-insoluble cutting oil agent sold in the market was immersed in 100 ml of various detergent compositions held at a temperature of 35 ° C for 3 minutes of ultrasonic cleaning (frequency 38 kHz, output 200 W) After that, it was dried at 70 ° C for 1 hour by warm air. After drying, determine the amount of residual oil component of the bolt, The evaluation of the detergency was carried out by the following evaluation criteria.

Evaluation criteria ◎: Residual oil content Less than 10μg

○: residual oil component 10 μg or more, 50 μg or less

△: Residual oil component 50 μg or more, 100 μg or less

×: residual oil component 100 μg or more

<Drying test>

The aluminum plate (15 cm ψ × 0.4 mmt) was immersed in a detergent at 40 ° C, pulled up and quietly suspended for 30 seconds, and then subjected to liquid cutting, and then dried by a warm air of 50 ° C, and dried. time. The evaluation criteria for dryness are as follows.

Evaluation criteria ◎: 70 seconds under full

○: 70 seconds or more, 80 seconds or less

△: 80 seconds to 100 seconds is not full

×: 100 seconds or more

<Measurement of flash point>

The flash point was measured in accordance with JIS K 2265 using a Cleveland open flash point tester.

Evaluation criteria ○: no flash point

×: There is a flash point

<Comprehensive evaluation>

Comprehensive evaluation was carried out by the following evaluation criteria.

Evaluation criteria ◎: The evaluation of the detergency and the dryness were ◎, and the evaluation of the flash point was ○

○: The evaluation of the detergency and the dryness are both ◎ or one of them is not ×, and the evaluation of the flash point is ○

×: Washability, dryness and flash point are all ×

In addition, the meanings of the abbreviations in the tables are as follows.

DEGDE: Diethylene glycol diethylene ether

PG: propylene glycol

DEGE: Diethylene glycol monoethyl ether

DPGM: dipropylene glycol monomethyl ether

MMB: 3-methyl-3-methoxy-1-butanol

MMBA: 3-methyl-3-methoxy-1-butyl acetate (water-insoluble solvent)

DEGEM: Diethylene glycol methyl ethyl ether

PNB: propylene glycol monobutyl ether (water insoluble solvent)

DPGB: dipropylene glycol monobutyl ether (water insoluble solvent)

DPGP: dipropylene glycol monopropyl ether (water-insoluble solvent)

PNP: propylene glycol monopropyl ether

Example 1~14

The detergent composition containing the water, diethylene glycol diethyl ether and the water-soluble solvent described in Table 1 was prepared, and the obtained detergent composition was evaluated.

Comparative Example 1~12

The detergent composition shown in Table 1 was prepared, and the obtained detergent composition was evaluated.

Comparative Example 2, which does not use water, Comparative Examples 3 to 9, 11, and 12 which do not use diethylene glycol diethyl ether, and the detergent compositions of Comparative Examples 1 and 10 which do not use a water-soluble solvent It is more deteriorated than the detergent composition described in the examples.

[Industrial Availability]

The detergent composition of the present invention can be used in various industrial fields such as automobiles, machinery, precision machinery, motors, and electronics, and can be used for washing oil or the like attached to a treated part or the like.

In addition, the entire disclosure of the specification, the scope of the patent application, and the summary of the disclosure of the Japanese Patent Application No. 2011-258050, filed on Nov. 25, 2011.

Claims (8)

A non-priming detergent composition comprising water, diethylene glycol diethyl ether and a water-soluble solvent, having a clouding point of 30 ° C or more and 100 ° C or less. The detergent composition of claim 1, wherein the water-soluble solvent is propylene glycol, diethylene glycol monoethyl ether, dipropylene glycol monomethyl ether, 3-methyl-3-methoxy One or more selected from the group consisting of 1-butanol and diethylene glycol methyl ethyl ether. The detergent composition according to claim 1 or 2, wherein the water is 5% by volume or more and 30% by volume or less, the diethylene glycol diethyl ether is 40% by volume or more, and the water-soluble solvent is 40%. Capacity% or less. The detergent composition according to any one of claims 1 to 3, wherein the diethylene glycol diethyl ether is 50% by volume or more and 80% by volume or less. The detergent composition according to any one of claims 1 to 4, wherein the water-soluble solvent is 5 vol% or more and 30 vol% or less. The detergent composition according to any one of claims 1 to 5, wherein the cloud point is 50 ° C or more and 90 ° C or less. The detergent composition according to any one of claims 1 to 6, wherein the water-soluble solvent is propylene glycol, diethylene glycol monoethyl ether or dipropylene glycol monomethyl ether. A cleaning method characterized by using a detergent composition according to any one of claims 1 to 7 to wash a part of any one of a processing oil and a flux.