JP5893519B2 - Cleaning liquid composition - Google Patents

Description

  The present invention relates to a cleaning liquid composition, and in particular, a composite of low-polarity dirt and high-polarity dirt adhering to parts handled in various industrial fields such as automobiles, machines, precision equipment, electricity, electronics, optics, etc. The present invention relates to a cleaning liquid composition that can be removed by washing.

  Parts (hereinafter referred to as “parts”) used in various industrial fields such as automobiles, machines, precision equipment, electricity, electronics, optics, etc. (i) are oily mainly composed of mineral oil during processing. Various processing oils from low polarity to high polarity, such as water-soluble processing oil emulsified in water by adding a surfactant to processing oil, mineral oil, etc., (ii) fine particles, etc. are used. In particular, a lot of water-soluble processing oil is used mainly for cutting and grinding, and parts manufactured through multiple processing steps use different processing oils for each process, so polar In many cases, various stains from low to high polarity are combined and adhered. Further, when performing machining such as cutting, grinding, and polishing, a wax is used as a temporary fixing adhesive for fixing the component to a jig. When the machining of the part is finished, the wax adhering to the part is removed. Various waxes are used depending on the application, from those having a low polarity to those having a high polarity.

When cleaning parts with a mixture of various types of dirt from low polarity to high polarity, water-soluble in chlorinated solvents such as trichlorethylene and methylene chloride, aqueous cleaners, and aqueous cleaners Semi-aqueous cleaning agents, hydrocarbon cleaning agents, alcohol-based cleaning agents such as isopropanol, glycol ether-based cleaning agents and the like in which a solvent is mixed are used. However, in any case, all the required items such as detergency, dryness, safety, economy, and harmfulness are all applied to parts with various dirts mixed and adhered from low polarity to high polarity. It cannot be satisfied.
Furthermore, for the purpose of further improving the properties such as detergency of these detergents, a detergent composition comprising diethylene glycol diethyl ether and 3-methyl-3-methoxy-1-butanol has been proposed (for example, , See Patent Document 1), there is no upper limit to the solubility of water, and in order to maintain detergency, equipment for removing water is required, which is inferior in economic efficiency.

  Furthermore, the present inventors have also studied a cleaning liquid composition containing an aromatic hydrocarbon, a surfactant, and water (see, for example, Patent Documents 2 and 3). However, these cleaning liquid compositions still have room for improvement in detergency against highly polar soils.

JP 2011-68858 A JP 2002-256285 A JP 2004-143409 A

  SUMMARY OF THE INVENTION An object of the present invention is to provide a cleaning liquid composition that can clean and remove dirt that is a mixture of low-polarity dirt and high-polarity dirt that adheres to a part.

  In order to solve the above problems, the present inventors have conducted intensive research, and as a result, based on linear saturated aliphatic hydrocarbons having higher water acceptability than aromatic hydrocarbons, surfactants and water By using a microemulsion-type cleaning liquid composition with a high saturated water content, it is possible to improve the cleaning power of highly polar dirt, and to remove dirt that is a mixture of low polarity dirt and highly polar dirt attached to the parts. It has been found that it can be removed by washing, and the present invention has been completed.

That is, the cleaning liquid composition of the present invention comprises (A) a linear saturated aliphatic hydrocarbon, (B) an anionic surfactant, (C) a nonionic surfactant, and (D) water, A) The content of the linear saturated aliphatic hydrocarbon is 60.0% by mass to 85.0% by mass with respect to the cleaning liquid composition, and the content of the (B) anionic surfactant is in the cleaning liquid composition. The content of the nonionic surfactant (C) is 2.0% by mass to 5.0% by mass with respect to the cleaning liquid composition. The content of the (D) water is 1.0% by mass to 20.0% by mass with respect to the cleaning liquid composition, and the (B) anionic surfactant and the (C) nonionic surfactant The total content ((B) + (C)) is 10.0% by mass to 20.0% by mass with respect to the cleaning liquid composition, The content ratio ((B) / (C)) of the anionic surfactant to the (C) nonionic surfactant is 2.0 to 5.0, and the (A) linear saturated aliphatic group Saturated water content measured by turbidity of a mixed solution obtained by adding water to a composition comprising hydrocarbon, (B) anionic surfactant, and (C) nonionic surfactant is 10% by mass or more. It is characterized by being.
The cleaning liquid composition is a mixed liquid obtained by adding water to a composition comprising (A) a linear saturated aliphatic hydrocarbon, (B) an anionic surfactant, and (C) a nonionic surfactant. When the saturated water content measured by the turbidity of the water is 10% by mass or more, the water is highly dispersed in the hydrocarbon, and while maintaining the cleaning power of the low polarity dirt, The detergency can be improved, and the dirt adhering to the parts, particularly, the dirt composed of the low polarity dirt and the high polarity dirt can be washed and removed.

In the present specification, “linear saturated aliphatic hydrocarbon” means a saturated aliphatic hydrocarbon having 0 branching.
Further, in this specification, “saturated water content” means turbidity of a mixed solution obtained by adding water to a composition comprising a linear saturated aliphatic hydrocarbon, an anionic surfactant, and a nonionic surfactant. The amount of water added to the composition when (JIS K0101) is 100 NTU (mass% with respect to the mixture of the composition and the water) is meant. Here, the turbidity of the mixed solution is measured using a turbidimeter (trade name: portable turbidimeter type 2100P, manufacturer name: Central Science Co., Ltd.).

  In the cleaning liquid composition of the present invention, water is added to the composition comprising (A) a linear saturated aliphatic hydrocarbon, (B) an anionic surfactant, and (C) a nonionic surfactant. It is preferable that the saturated water content measured by the turbidity of the liquid mixture is equal to or greater than the content of the water (D) with respect to the cleaning liquid composition.

  In the cleaning liquid composition of the present invention, (A) the linear saturated aliphatic hydrocarbon has 9 to 13 carbon atoms, (B) the anionic surfactant is a dialkyl succinate salt, ) The nonionic surfactant is preferably a sorbitan fatty acid ester.

  According to the present invention, it is possible to wash and remove dirt that is a combination of dirt having a low polarity and dirt having a high polarity attached to a component.

It is a graph which shows the relationship between the water density | concentration in Experimental example 2, and turbidity and the average particle diameter of a micelle. It is a photograph of the wave type cage with a nail used for the washing test of water-soluble processing oil. It is a determination sample in which the evaluation standard of the washing test of the simulated particles is ◎, (a) shows before washing, and (b) shows after washing. It is a determination sample in which the evaluation standard of the washing test of the simulated particles is “◯”, (a) shows before washing, and (b) shows after washing. It is a sample of the unwashed product of the flux washing test. This is a determination sample in which the evaluation standard of the flux cleaning test is ◎ (no residue). This is a determination sample in which the evaluation standard of the flux cleaning test is x (with white residue).

Hereinafter, embodiments of the present invention will be described in detail.
(Cleaning liquid composition)
The cleaning liquid composition of the present invention contains at least (A) a linear saturated aliphatic hydrocarbon, (B) an anionic surfactant, (C) a nonionic surfactant, and (D) water, and is further necessary. Depending on the, other ingredients are included.

<(A) Linear saturated aliphatic hydrocarbon>
There is no restriction | limiting in particular as carbon number of said (A) linear saturated aliphatic hydrocarbon, Although it can select suitably according to the objective, 9-13 are preferable, 10-13 are more preferable, 10-12 Is particularly preferred.
If the number of carbon atoms of the (A) straight-chain saturated aliphatic hydrocarbon is less than 9, the flash point of the cleaning liquid composition may become low and dangerous, and if it exceeds 13, the viscosity of the cleaning liquid composition may be The cleaning efficiency may decrease. On the other hand, when the carbon number of the (A) linear saturated aliphatic hydrocarbon is within the more preferable range or the particularly preferable range, it is advantageous in terms of both safety and cleaning efficiency.
In addition, you may mix the alkylbenzene and / or alkylnaphthalene which are mentioned later as said other component with said (A) linear saturated aliphatic hydrocarbon.

The (A) linear saturated aliphatic hydrocarbon is not particularly limited and may be appropriately selected depending on the intended purpose. Examples thereof include normal heptane (carbon number 7), normal octane (carbon number 8), normal Nonane (carbon number 9), normal decane (carbon number 10), normal undecane (carbon number 11), normal dodecane (carbon number 12), normal tridecane (carbon number 13), normal tetradecane (carbon number 14), normal pentadecane (Carbon number 15). These may be used individually by 1 type and may use 2 or more types together.
Among these, normal decane (carbon number 10), normal undecane (carbon number 11), and normal dodecane (carbon number 12) are preferable in terms of both safety and cleaning efficiency.

-(A) Content of linear saturated aliphatic hydrocarbon-
The content of the linear saturated aliphatic hydrocarbon (A) is not particularly limited as long as it is 60.0% by mass to 85.0% by mass with respect to the cleaning liquid composition, and is appropriately selected depending on the purpose. However, 75.0% by mass to 80.0% by mass is preferable.
When the content of the (A) linear saturated aliphatic hydrocarbon is 60.0% by mass or more based on the cleaning liquid composition, it is possible to improve the cleaning power against dirt with low polarity, and 85.0 The cleaning power with respect to highly polar dirt can be improved as it is below mass%. In addition, when the content of the straight chain saturated aliphatic hydrocarbon (A) is less than 75.0% by mass with respect to the cleaning liquid composition, the detergency against dirt with low polarity may be reduced. If it is more than 0.0% by mass, the detergency against highly polar dirt may be reduced.

<(B) Anionic surfactant>
There is no restriction | limiting in particular as said (B) anionic surfactant, According to the objective, it can select suitably, For example, sulfonates, such as petroleum sulfonate and funnel oil, sulfate ester salt, carboxylate, etc. Is mentioned. These may be used individually by 1 type and may use 2 or more types together.
Among these, (i) C8-C22 hydrocarbon sulfonate (sulfonate), (ii) C8-C18 sulfated oil (sulfate ester salt), (iii) C8-C8 18 alkyl sulfates (sulfate esters), (iv) dialkyl sulfosuccinic acid ester salts having 6 to 13 carbon atoms in the alkyl group, alkyl disulfates having 6 to 13 carbon atoms in the alkyl group, carbons in the alkyl group Succinic acid salts (carboxylates) such as polyoxyethylene alkylsulfosuccinic acid disalts having 6 to 13 are preferable from the viewpoint of forming a stable solubilized W / O emulsion, and in particular, di (2-ethylhexyl). Dialkyl sulfosuccinic acid ester salts (dialkyl succinic acid ester salts) having 6 to 13 carbon atoms in the alkyl group such as sodium sulfosuccinate are stable solubilized W / O esters. In terms of Rujon formation, it is preferably used.
In addition, when a substance other than alkylbenzene sulfonate is used as the sulfonate, for example, the substance is not a target substance for measures (PRTR) regarding grasping the amount released to the environment, and management becomes easy.
In addition, although a salt here is an alkali metal salt, alkaline-earth metal salt, ammonium salt, a C1-C5 alkanolamine salt, etc., the acid itself which does not form a salt may be used, for example. it can.

-(B) Content of anionic surfactant-
The content of the (B) anionic surfactant is not particularly limited as long as it is 8.0% by mass to 15.0% by mass with respect to the cleaning liquid composition, and is appropriately selected according to the purpose. However, 9.0 mass% to 15.0 mass% is preferable.
When the content of the (B) anionic surfactant is 8.0% by mass or more based on the cleaning liquid composition, it is possible to improve detergency against highly polar dirt, and 15.0% by mass. The detergency with respect to dirt with low polarity can be improved as follows. In addition, when the content of the (B) anionic surfactant is less than 9.0% by mass with respect to the cleaning liquid composition, the cleaning power against highly polar dirt may be reduced.

<(C) Nonionic surfactant>
The (C) nonionic (nonionic) surfactant is not particularly limited and may be appropriately selected depending on the intended purpose. Examples thereof include polyalkylene glycols and fatty acid esters. These may be used individually by 1 type and may use 2 or more types together.
Among these, fatty acid esters are preferable from the viewpoint of forming a stable solubilized W / O emulsion.

-Polyalkylene glycols-
There is no restriction | limiting in particular as said polyalkylene glycol, According to the objective, it can select suitably, For example, a polyoxyethylene polyoxypropylene block copolymer, polyoxyethylene polyoxypropylene alkyl ether, etc. are mentioned.
When the polyalkylene glycols are used, the thermal stability can be improved, and when the fatty acid esters are used, the detergency can be improved.
In addition, when a substance other than polyoxyethylene alkyl ether and polyoxyethylene alkyl phenyl ether is used as the polyalkylene glycol, for example, it is not a target substance for measures relating to grasping the amount released to the environment (PRTR). Easy to manage.

As the polyoxyethylene polyoxypropylene block copolymer,
_{HO- (C 2 H 4 O)} a - (C 3 H 6 O) b - (C 2 H 4 O) c -H, or,
_{HO- (C 3 H 6 O)} a - (C 2 H 4 O) b - (C 3 H 6 O) c -H
It is preferable that the molecular weight of polypropylene glycol (hydrophobic group) is 3500 or less, and the content of ethylene oxide in the total molecule is 50% by mass or less. In addition, a is preferably 2 to 160, b is preferably 10 to 60, and c is preferably 2 to 160.

As the polyoxyethylene polyoxypropylene alkyl ether,
R ¹ —O— (C ₃ H ₆ O) _n — (C ₂ H ₄ O) _m —H is a compound represented by R ¹ is an alkyl group having 6 to 16 carbon atoms, and n and m are 2 to 2 16 is preferred.

-Fatty acid esters-
The fatty acid esters are not particularly limited and may be appropriately selected depending on the intended purpose. Examples thereof include sorbitan fatty acid esters, ethylene glycol fatty acid esters, glycerin fatty acid esters, propylene glycol fatty acid esters, and polyoxy fatty acid esters. Can be mentioned. These may be used individually by 1 type and may use 2 or more types together.
Among these, sorbitan fatty acid esters are preferable from the viewpoint of forming a stable solubilized W / O emulsion.

-(C) Content of nonionic surfactant-
The content of the (C) nonionic surfactant is not particularly limited as long as it is 2.0% by mass to 5.0% by mass with respect to the cleaning liquid composition, and is appropriately selected according to the purpose. However, 3.0 mass%-5.0 mass% are preferable.
When the content of the (C) nonionic surfactant is 2.0% by mass or more based on the cleaning liquid composition, it is possible to improve the detergency against highly polar dirt, and 5.0% by mass. The detergency with respect to dirt with low polarity can be improved as follows.
Moreover, the cleaning power with respect to highly polar stain | pollution | contamination may fall that content of the said (C) nonionic surfactant is less than 3.0 mass% with respect to a cleaning liquid composition.

<Mass ratio of (B) anionic surfactant to (C) nonionic surfactant ((B) / (C))>
The mass ratio of (B) anionic surfactant to (C) nonionic surfactant ((B) / (C)) is not particularly limited as long as it is 2.0 to 5.0. Although it can select suitably according to, 2.0-4.0 are preferable.
When the mass ratio ((B) / (C)) is 2.0 to 5.0, it is possible to improve the cleaning power against highly polar dirt.
Further, when the mass ratio ((B) / (C)) is less than 2.0, the cleaning power against highly polar dirt may be reduced.

<Total content of (B) anionic surfactant and (C) nonionic surfactant ((B) + (C))>
The total content of (B) anionic surfactant and (C) nonionic surfactant ((B) + (C)) is 10.0% by mass to 20.0% with respect to the cleaning liquid composition. As long as it is mass%, there is no restriction | limiting in particular, Although it can select suitably according to the objective, 12.0 mass%-20.0 mass% are more preferable.
When the total content ((B) + (C)) is 10.0% by mass or more, it is possible to improve detergency against highly polar dirt, and when the total content is 20.0% by mass or less The detergency against low dirt can be improved.
Further, when the total content ((B) + (C)) is less than 12.0% by mass, the cleaning power against highly polar dirt may be reduced.

<(D) Water>
The content of the water (D) is not particularly limited as long as it is 1.0% by mass to 20.0% by mass with respect to the cleaning liquid composition, and can be appropriately selected according to the purpose. 5.0 mass%-20.0 mass% are preferable with respect to a composition, 5.0 mass%-15.0 mass% are more preferable, and 5.0 mass%-10.0 mass% are especially preferable.
When the content of the water (D) is 1.0% by mass or more with respect to the cleaning liquid composition, it is highly polar dirt, and the cleaning power against dirt other than wax can be improved. When it is 20.0% by mass or less, it is possible to improve the detergency of dirt with low polarity and dirt other than wax.
Further, when the content of the water (D) is less than 5.0% by mass with respect to the cleaning liquid composition, the detergency against a highly polar wax may be reduced, and the content is more than 15.0% by mass. If it exists, stability may worsen. On the other hand, when the content of the water (D) is in the more preferable range or in the particularly preferable range, it is advantageous in that both the cleaning power against dirt with high polarity and the cleaning power against dirt with low polarity can be increased. It is.
Moreover, when the content of the water (D) is equal to or less than the saturated water content, it is possible to prevent a poor rinse. Here, the saturated water content is defined by turbidity (JIS K0101), and if it is 100 NTU or less, the water content is defined as the saturated water content or less.
The cleaning composition of the present invention can be used by adjusting the amount of water in advance and contacting the object to be cleaned as it is, but once the composition having a low amount of water is adjusted, water is further added appropriately before cleaning. The water content can be adjusted. By the method of additionally adjusting the water content of the cleaning composition at the time of use, a high cleaning power can be obtained while suppressing quality fluctuations during storage and transportation.

<(E) Other ingredients>
The other component (E) is not particularly limited as long as it is a component that does not impair the effects of the present invention even when mixed or added, and can be appropriately selected depending on the purpose. Ingredients, various additives, and the like.
The other cleaning liquid component is not particularly limited and may be appropriately selected depending on the purpose. For example, hydrocarbons other than the hydrocarbon specified in the present invention (for example, trimethylbenzene, ethyltoluene, tetramethylbenzene, etc.) Alkylbenzene, for example, alkylnaphthalene such as methylnaphthalene, ethylnaphthalene, and dimethylnaphthalene), various alcohols, ketones, esters, polyethers, chlorine-free hydrofluorocarbons, N-methylpyrrolidone, cyclohexanone, and the like.
There is no restriction | limiting in particular as said additive, According to the objective, it can select suitably, For example, a rust preventive agent, antioxidant, antiseptic | preservative, etc. are mentioned.
The rust inhibitor is not particularly limited and may be appropriately selected depending on the purpose. For example, (i) fatty acid ester rust inhibitor such as pentaerythritol monoester and sorbitan monooleate; (ii) amine, Amine type rust preventives such as amine salts; (iii) carboxylic acid type rust preventives such as aromatic carboxylic acid, alkenyl succinic acid and naphthenate; (iv) organic sulfonic acid type rust preventives such as petroleum sulfonate; v) Organophosphate ester rust inhibitor; (vi) Oxidized paraffin rust inhibitor; and the like.

There is no restriction | limiting in particular as content of said (E) other component, Although it can select suitably according to the objective, 10.0 mass% or less is preferable with respect to a washing | cleaning liquid composition, 5.0 mass % Or less is more preferable, and 1.0 mass% or less is particularly preferable.
When the content of the (E) other component is more than 10% by mass with respect to the cleaning liquid composition, the cleaning power against highly polar dirt may be reduced. On the other hand, when the content of the (E) other component is within the more preferable range or the particularly preferable range, it is advantageous in terms of forming a stable solubilized W / O emulsion.

<Saturated water content>
The saturated water content is not particularly limited as long as it is 10% by mass or more, and can be appropriately selected according to the purpose, but is preferably 10% by mass to 35% by mass, and the (D) water It is preferable that it is more than the content with respect to the cleaning liquid composition.
When the saturated moisture content is 10% by mass or more, it is possible to improve detergency against highly polar dirt.
Further, when the saturated water content is less than 10% by mass, the cleaning power against highly polar dirt may be reduced, and when it exceeds 35% by mass, the cleaning power against low polarity dirt may be reduced. is there.
Moreover, it can prevent that it becomes a rinse defect that the said saturated water content is more than content with respect to the washing | cleaning liquid composition of the said (D) water.

<Average size of micelle formed in cleaning liquid composition>
In the cleaning liquid composition, micelles are formed.
There is no restriction | limiting in particular as an average particle diameter (Z-Average, scattered light reference average particle diameter) of the said micelle, Although it can select suitably according to the objective, 10 nm or less is preferable.
If the average particle diameter of the micelles is more than 10 nm, poor rinsing may occur.
The average particle diameter of the micelle is measured by a zeta potential / particle diameter / molecular weight measuring device (trade name: Zeta Sizer Nano, manufacturer name: Spectris Co., Ltd.).
In addition, when the particle size of the micelle of the cleaning liquid composition is 10 nm or less, the cleaning liquid composition is regarded as a solubilized W / O emulsion type.

<Method of contacting the cleaning liquid composition with the object to be cleaned>
Cleaning can be performed by bringing the cleaning liquid composition into contact with a component that is an object to be cleaned.
There is no restriction | limiting in particular as a method of making the said washing | cleaning liquid composition contact the said washing | cleaning target object, According to the objective, it can select suitably, Any of well-known methods can be used.
Specific examples of the method of bringing the cleaning liquid composition into contact with the object to be cleaned include, for example, (i) a method of wiping with a sponge impregnated with the cleaning liquid composition, and (ii) immersion and / or spraying in the cleaning liquid composition. And the method used.
In the immersion method, it is preferable to combine stirring, rocking, ultrasonic waves, air bubbling, or the like at the same time in order to enhance the cleaning effect.
Further, since the cleaning liquid composition contains a surfactant, the linear saturated aliphatic acid contained in the cleaning liquid composition is washed after the object to be cleaned is washed for the purpose of removing the surfactant and improving the drying property. It is preferable to perform rinsing with a hydrocarbon having a boiling point lower than that of the hydrocarbon, particularly an aliphatic hydrocarbon.

Embodiments of the present invention are illustrated below by examples, but the present invention is not limited to these examples.
(Experimental Examples 1-6)
(A) Hydrocarbon (linear saturated aliphatic hydrocarbon: normal undecane, normal dodecane; aromatic hydrocarbon: alkylbenzene (compound name: alkylbenzene having 9 to 11 carbon atoms, product name: EM Clean) 2000E, manufacturing company name: JX Nippon Oil & Energy Corporation, alkyl naphthalene (compound name: alkyl naphthalene having 12 to 13 carbon atoms, trade name: EM Clean 5000E, manufacturing company name: JX Nippon Oil & Energy Corporation) )), (B) anionic surfactant (dialkyl succinate ester salt: sodium di (2-ethylhexyl) sulfosuccinate), and (C) a nonionic surfactant (sorbitan fatty acid ester: sorbitan trioleate) Until the turbidity of the mixed liquid is 100 NTU as shown in Table 1. Table 1 shows the water concentration upon addition of (saturated water content (mass%)).
Moreover, the graph which shows the relationship between the water density | concentration, the turbidity, and the average particle diameter of a micelle in Experimental example 2 is shown in FIG.
The turbidity was measured using a turbidimeter (trade name: portable turbidimeter 2100P type, manufacturer: Central Science Co., Ltd.). The average micelle particle size was measured using a zeta potential / particle size / molecular weight measuring device (trade name: Zetasizer Nano, manufacturer: Spectris Co., Ltd.).

(Examples 1-10, Comparative Examples 1-6)
About the washing | cleaning-liquid composition which mix | blended each component as shown to Table 2-1-Table 2-8, as shown below, (i) Cleaning test of water-soluble processing oil, (ii) Cleaning test of simulated particle | grains, ( iii) A cleaning test for oily processing oil, (iv) a flux cleaning test, and (v) a measurement test for saturated water content (% by mass) were performed.

<(I) Cleaning test of water-soluble processing oil>
(1) First, the following water-soluble processing oils (i) to (vi) were diluted twice (50%) with distilled water.
(I) Castrol Hysol X (Category: A1 Type 2; Manufacturer name: BP Japan (
stock))
(Ii) Castol Arusol B (Category: Type A2 Type 2; Manufacturer: BP Japan Co., Ltd.)
(Iii) Castrol Syntilo 81 (Category: Type A3 No. 1; Manufacturer name: BP Japan Co., Ltd.)
(Iv) Chemic Chemi-Cool EA (Category: A1 type 2; manufacturer name: Chemic Co., Ltd.)
(V) Chemic Chemicool EX-630 (Category: Type A3 No. 1; Manufacturer name: Chemic Co., Ltd.)
(Vi) Idemitsu Daphne Aqua Cool CC (Category: A1 Type 1; Manufacturer: Idemitsu Kosan Co., Ltd.)
(2) Next, the simulated part (corrugated wave cage shown in FIG. 2 (manufactured by SUS)) is degreased and completely immersed in diluted water-soluble processing oils (i) to (vi), and warm air The sample was air-dried (40 ° C., 3 hours) using a dryer (trade name: SPHH-201, manufacturer name: ESPEC), and weighed.
(3) Next, in a predetermined cleaning liquid composition, ultrasonic cleaning (28 kHz, 25 ° C.) using an ultrasonic cleaner (trade name: W-113, manufacturer: Honda Electronics Co., Ltd.) Was performed for 3 minutes, rocked at 25 ° C. for 1 minute, and rinsed with normal decane.
(4) The residual oil content was calculated | required from the weight after drying for 20 minutes at 80 degreeC using the warm air dryer (brand name: SPHH-201, manufacturer company name: ESPEC).
(5) Evaluation was performed according to the following evaluation criteria. The results are shown in Tables 2-1 and 2-2.
○: Residual oil (residual oil amount) less than 0.001 g ×: Residual oil (residual oil amount) of 0.001 g or more

<(Ii) Simulated particle cleaning test>
(1) First, a 10% by mass aqueous solution of the water-soluble processing oils (iii) and (vi) was prepared.
(2) Next, a drop of a 10% by weight aqueous solution of the prepared water-soluble processing oil was applied to the degreased iron plate (SPCC-SB, JIS G3141, 30 mm × 30 mm × 1 mm, polished with # 240). .
(3) Next, 0.02 g of iron powder (electrolytic iron, manufacturing company name: Kanto Chemical Co., Ltd.) is sprayed on an iron plate coated with a 10% by weight aqueous solution of water-soluble processing oil, and about 5 mm from the edge of the iron plate. The test piece was prepared by drying at 120 ° C. for 3 hours using a warm air dryer (trade name: SPHH-201, manufacturer name: ESPEC).
(4) Put the prepared test piece into a beaker containing 50 mL of each room temperature cleaning solution composition, and use an ultrasonic cleaner (trade name: W-113, manufacturer: Honda Electronics Co., Ltd.) Ultrasonic cleaning (45 kHz) was performed for 3 minutes.
(5) After cleaning, the test piece was taken out from each cleaning liquid composition, and the iron powder remaining after draining was visually observed.
(6) Evaluation was performed according to the following evaluation criteria. The results are shown in Tables 2-3 and 2-4.
A: Iron powder cannot be confirmed.
○: Several iron powders remain.
Δ: Dozens of iron powder remained.
X: Several hundred pieces of iron powder remain.
FIG. 3 is a determination sample in which the evaluation standard of the simulated particle cleaning test is ◎, (a) shows before cleaning, (b) shows after cleaning, and FIG. 4 shows the evaluation standard of the cleaning test of simulated particles. It is a determination sample that is ◯, (a) shows before washing, and (b) shows after washing.

<(Iii) Cleaning test of oil-based processing oil>
(1) First, the weight of the degreased iron plate (SPCC-SB, JIS G3141, 30 mm × 30 mm × 1 mm, polished with # 240) was measured.
(2) Next, the iron plate whose weight was measured was completely immersed in industrial general-purpose oil (trade name: Lasus 150, manufacturer name: JX Nippon Oil & Energy Corporation), and a hot air dryer (trade name) : SPHH-201, manufacturer name: ESPEC), dried at 120 ° C. for 3 hours, cooled at room temperature, and weighed.
(3) The weighed iron plate was immersed in a beaker containing 100 mL of each room temperature cleaning solution composition for 2 minutes (no rocking, no ultrasonic cleaning, only immersion).
(4) The immersed iron plate (test piece) was taken out from each cleaning solution composition and immersed in a rinsing solution (normal decane) for 10 seconds.
(5) The test piece was taken out from each rinse liquid, dried for 40 minutes at 70 ° C. using a warm air dryer (trade name: SPHH-201, manufacturer name: ESPEC), and the mass of the test piece was measured.
(6) Evaluation was performed according to the following evaluation criteria. The results are shown in Tables 2-5 and 2-6.
○: Removal rate is 99% by mass or more ×: Removal rate is less than 99% by mass

<(Iv) Flux cleaning test>
(1) The following solder paste (cream solder) reflowed on a substrate (ICB-96PU) at 230 ° C. using a desktop reflow soldering apparatus (trade name: RF-221, manufacturer name: JAPAN PULSE LABORATORIES, INC) (I) or the following thread solder (ii) to (vi) attached with a soldering iron, using an ultrasonic cleaner (trade name: W-113, manufacturer: Honda Electronics Co., Ltd.) Then, ultrasonic cleaning (28 kHz) was performed for 2 minutes or 5 minutes, and the substrate after the cleaning was visually observed with a stereomicroscope (trade name: Stemi DV4, manufacturer name: Carl Zeiss).
(I) Solder paste (trade name: M705-330F-42-10.5, manufacturing company name: Senju Metal Industry Co., Ltd.)
(Ii) Thread solder (trade name: Sparkle solder 70, manufacturing company name: Senju Metal Industry Co., Ltd.)
(Iii) Thread solder (trade name: Sparkle ESC21, manufacturing company name: Senju Metal Industry Co., Ltd.)
(Iv) Thread solder (trade name: RZ21 PF305, manufacturer: Nihon Solder Co., Ltd.)
(V) Thread solder (trade name: SO3X7C-56M, manufacturer name: Mitsuteru Corporation)
(Vi) Thread solder (trade name: LLS219α, manufacturer: Solder Coat Co., Ltd.)
(2) Evaluation was performed according to the following evaluation criteria. The results are shown in Tables 2-7 and 2-8.
◎: No residue ○: Some residue △: Some residue ×: White residue Note that Fig. 5 is a sample of an unwashed product in the flux cleaning test, and Fig. 6 shows the evaluation criteria for the flux cleaning test. FIG. 7 is a determination sample in which the evaluation standard of the flux cleaning test is x (with white residue).

<(V) Measurement test of saturated water content (mass%)>
(A) A mixture of hydrocarbon, (B) anionic surfactant, and (C) nonionic surfactant mixed to a predetermined concentration shown in Table 2-1 to Table 2-8 The concentration (saturated water content (mass%)) when water was added until the turbidity of the solution reached 100 NTU was measured. The measurement results are shown in Tables 2-1 to 2-8. The turbidity was measured using a turbidimeter (trade name: portable turbidimeter 2100P type, manufacturer: Central Science Co., Ltd.).

(Examples 11-53, Comparative Examples 7-40)
About the washing | cleaning-liquid composition which mix | blended each component as shown to Table 3-1-Table 3-11, as shown below, (vi) Wax cleaning test (stirring), (vii) Wax cleaning test (copper board), ( v) A measurement test of a saturated water content (% by mass) was performed.

<(Vi) Wax cleaning test (stirring)>
The cleaning solution composition and the wax were mixed at 95: 5 (mass ratio) and stirred for 24 hours at room temperature. The evaluation results (stirring) of the dissolution test are shown in Tables 3-1 to 3-11. In addition, paraffin wax (trade name: Paraffin wax 135, manufacturing company name: Nippon Seiki Co., Ltd.) is used as a low polarity wax, Aqua Wax 553 (manufactured by Nikka Seiko Co., Ltd.) is used as a high polarity wax, and As an intermediate, Alcowax 542M (manufactured by Nikka Seiko Co., Ltd.) was used.

<(Vii) Wax cleaning test (copper plate)>
A copper plate with wax attached thereto was immersed in the cleaning liquid composition, irradiated with ultrasonic waves (28 kHz) for 2 minutes, and rinsed with normal decane for 30 seconds, and the surface of the copper plate was visually observed. The case where there was no residue such as wax was marked with ◯, and the others were marked with x (cleaning test). The evaluation results (copper plate) of the cleaning test are shown in Tables 3-1 to 3-11. As waxes, paraffin wax (trade name: paraffin wax 135, manufacturing company name: Nippon Seiki Co., Ltd.), ARCO wax 542M (manufactured by Nikka Seiko Co., Ltd.), and aqua wax 553 (Nika Seiko Co., Ltd.) Product).

<(V) Measurement test of saturated water content (mass%)>
A mixture of (A) hydrocarbon, (B) anionic surfactant, and (C) nonionic surfactant mixed to a predetermined concentration shown in Tables 3-1 to 3-11 The concentration (saturated water content (mass%)) when water was added until the turbidity of the solution became 10 NTU was measured. The measurement results are shown in Tables 3-1 to 3-11. The turbidity was measured using a turbidimeter (trade name: portable turbidimeter 2100P type, manufacturer: Central Science Co., Ltd.).

In Table 3-9, (B) petroleum sulfonate indicates sodium petroleum sulfonate (molecular weight 400), and (B) funnel oil indicates sodium castor oil sulfonate.

In Table 3-10, (B) petroleum sulfonate indicates sodium petroleum sulfonate (molecular weight 400), and (B) funnel oil indicates sodium castor oil sulfonate.

In Table 3-11, (A ′) aromatic hydrocarbon contains 99% by mass of alkyl naphthalene having 13 to 14 carbon atoms and dimethylnaphthalene and has a boiling point range of 260 ° C. to 275 ° C. Show.

  From Table 2-1 to Table 2-8, (A) linear saturated aliphatic hydrocarbon, (B) anionic surfactant, (C) nonionic surfactant, and (D) water, (A) The content of the linear saturated aliphatic hydrocarbon is 60.0% by mass to 85.0% by mass with respect to the cleaning liquid composition, and the content of the (B) anionic surfactant is the cleaning liquid composition. The content of the nonionic surfactant (C) is 2.0% by mass to 5.0% by mass with respect to the cleaning liquid composition. The (D) water content is 1.0% by mass to 20.0% by mass with respect to the cleaning liquid composition, the (B) anionic surfactant and the (C) nonionic surfactant. The total content ((B) + (C)) is 10.0% by mass to 20.0% by mass with respect to the cleaning liquid composition. The content ratio ((B) / (C)) of the cationic surfactant and the (C) nonionic surfactant is 2.0 to 5.0, and the (A) linear saturated aliphatic group Saturated water content measured by turbidity of a mixed solution obtained by adding water to a composition comprising hydrocarbon, (B) anionic surfactant, and (C) nonionic surfactant is 10% by mass or more. In this case, it is possible to clean and remove dirt that adheres to parts and that has low polarity and that is dirt other than wax and dirt that is highly polar and that is a combination of dirt other than wax. I understood.

  Furthermore, from Table 3-1 to Table 3-11, (A) linear saturated aliphatic hydrocarbon, (B) anionic surfactant, (C) nonionic surfactant, and (D) water are included. The content of the (A) linear saturated aliphatic hydrocarbon is 60.0% by mass to 85.0% by mass with respect to the cleaning liquid composition, and the content of the (B) anionic surfactant is a cleaning liquid. It is 8.0 mass%-15.0 mass% with respect to a composition, and content of the said (C) nonionic surfactant is 2.0 mass%-5.0 mass% with respect to a cleaning liquid composition. The content of the water (D) is 5.0% by mass to 20.0% by mass with respect to the cleaning liquid composition, and the (B) anionic surfactant and the (C) nonionic interface. The total content ((B) + (C)) with the activator is 10.0% by mass to 20.0% by mass with respect to the cleaning liquid composition, B) The content ratio ((B) / (C)) of the anionic surfactant to the (C) nonionic surfactant is 2.0 to 5.0, and the (A) linear saturation The saturated water content measured by the turbidity of a mixture obtained by adding water to a composition comprising an aliphatic hydrocarbon, the (B) anionic surfactant, and the (C) nonionic surfactant is 10% by mass. It was found that when the content was greater than or equal to%, dirt due to the wax adhering to the part, in particular, dirt composed of a combination of a low polarity wax and a high polarity wax could be washed and removed.

  The cleaning liquid composition of the present invention cleans dirt that is a combination of low-polarity dirt and high-polarity dirt that adheres to parts handled in various industrial fields such as automobiles, machinery, precision equipment, electricity, electronics, and optics. It is suitably used for removing.

Claims (3)

(A) a linear saturated aliphatic hydrocarbon, (B) an anionic surfactant, (C) a nonionic surfactant, and (D) water,
The content of the (A) linear saturated aliphatic hydrocarbon is 60.0% by mass to 85.0% by mass with respect to the cleaning liquid composition,
The content of the (B) anionic surfactant is 8.0% by mass to 15.0% by mass with respect to the cleaning liquid composition,
The content of the (C) nonionic surfactant is 2.0% by mass to 5.0% by mass with respect to the cleaning liquid composition,
The content of the water (D) is 1.0% by mass to 20.0% by mass with respect to the cleaning liquid composition,
The total content ((B) + (C)) of the (B) anionic surfactant and the (C) nonionic surfactant is 10.0% by mass to 20.0% with respect to the cleaning liquid composition. Mass%,
The content ratio ((B) / (C)) of the (B) anionic surfactant and the (C) nonionic surfactant is 2.0 to 5.0,
It was measured by the turbidity of a mixed solution in which water was added to the composition comprising (A) a linear saturated aliphatic hydrocarbon, (B) an anionic surfactant, and (C) a nonionic surfactant. A cleaning liquid composition having a saturated water content of 10% by mass or more.   It was measured by the turbidity of a mixed solution in which water was added to the composition comprising (A) a linear saturated aliphatic hydrocarbon, (B) an anionic surfactant, and (C) a nonionic surfactant. 2. The cleaning liquid composition according to claim 1, wherein the saturated water content is not less than the content of the water (D) with respect to the cleaning liquid composition. (A) carbon number of linear saturated aliphatic hydrocarbon is 9-13,
The (B) anionic surfactant is a dialkyl succinate salt,
The cleaning liquid composition according to claim 1, wherein the (C) nonionic surfactant is a sorbitan fatty acid ester.