JP3160854B2 - CLEANING COMPOSITION FOR PARTICLE REMOVAL, PROCESS FOR PRODUCING THE SAME, AND CLEANING METHOD USING THE SAME - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a metal part, a resin part, a glass part, an electronic / electric board, a ceramic part, and the like, which are adhered during processing of a metal part, a resin burr debris, a polishing debris, and an abrasive grain. The present invention relates to a cleaning agent for cleaning and removing particles such as solder chips and ceramic chips, and more particularly to a cleaning composition comprising a hydrocarbon solvent as a main component and capable of removing adhered particles without adding moisture. The present invention relates to a manufacturing method and a cleaning method using the same.

[0002]

2. Description of the Related Art After processing metal parts, resin parts, glass parts, electronic / electrical substrates, and ceramic parts, non-polar liquid mineral oils such as cutting oil and press oil, fluxes, surfactants, etc. Particles, such as polar substances, metal cutting chips, resin burr chips, polishing chips, abrasive grains, solder chips, and ceramic chips. In addition, when manual work is performed, sweat generated from the human body and protein-containing oil and fat stains adhere. As described above, since non-polar, polar substances and particles are attached in a composite form, it is necessary to use a cleaning agent having an affinity for them.

Heretofore, chlorine-based or chlorofluorocarbon-based cleaning agents which are flame-retardant and supplied at low cost have been used for such purposes. However, fluorine-based solvents such as chlorofluorocarbons and chlorine-based solvents such as 1,1,1-trichloroethane have safety problems for the natural environment and the human body, such as pollution of groundwater and destruction of the ozone layer. It is becoming more and more regulated. For this reason, many water-based or emulsion-based cleaning agents have been studied as cleaning agents in place of chlorine-based or chlorofluorocarbon-based solvents.

For example, Japanese Patent Application Laid-Open No. Hei 9-132800 discloses an aqueous detergent containing (A) an inorganic phosphoric acid and (B) an amine, and further comprises a nonionic surfactant and / or a nonionic surfactant. It is stated that a glycol ether compound may be added. It is stated that this makes it possible to obtain a cleaning agent that achieves both particle removal and oil stain removal.

[0005] Examples of emulsion type detergents are disclosed in JP-A-9-125099 and JP-A-9-157798, etc., and are composed of a mixture of a non-aqueous solvent, a surfactant and water. Agent is proposed. Japanese Patent Application Laid-Open No. Hei 9-125093 proposes a cleaning agent comprising a non-aqueous solvent, a surfactant, water and an alcoholamine. Further, Japanese Patent Application Laid-Open No. 7-109493 discloses that in order to improve detergency against metal working oil, grease and the like, water is added to a nonionic surfactant and 3-methoxy-
A detergent to which 3-methyl-1-butanol is added is described.

These water-based or emulsion-based cleaning agents have high safety and high detergency against cutting chips and water-based stains. However, rust easily occurs on the metal surface, and some optical glasses dissolve the surface and become cloudy when they come in contact with an aqueous or emulsion-based cleaning agent. Further, the degreasing power for metal working oil, grease, and the like may be insufficient.

On the other hand, when a hydrocarbon-based cleaning agent, which is a petroleum-based solvent, is used alone, it is a non-polar solvent, so it is highly effective in cleaning mineral processing oils. It is difficult to remove cutting chips such as metal and glass generated during processing. For this reason, JP-A-3-146597 discloses a cleaning agent in which a polar substance such as an alcohol, an ether or a ketone is added to a hydrocarbon solvent to dissolve dirt, thereby improving the flux removing property and the particulate removing property such as cutting chips. And JP-A-7-503032.
However, in order to remove particles such as cutting chips, further improvement was required.

[0008]

SUMMARY OF THE INVENTION The present invention relates to a hydrocarbon-based solvent which does not use water-based, emulsion-based, chlorofluorocarbon-based or chlorine-based solvents and has no problems such as rust on metal surfaces and erosion of optical glass. (1) ・ Processing oil adhering to the surface of parts, ・ Metal cutting chips, resin burr chips, polishing chips, abrasive particles, solder chips, ceramic chips, etc., ・ Moisture, ・ Flux, grease-like surface activity It is suitable for efficiently removing polar substances such as detergents, and protein-containing grease from the human body. (2) Production of detergents, concentration control of surfactants,
It is an object of the present invention to provide a hydrocarbon-based particle-removing detergent composition that is easy to maintain, a method for producing the same, and a method for cleaning using the same.

[0009]

Means for Solving the Problems The present inventors have solved the above problems.
As a result of searching for cleaning agents to solve
(A) fatty acid alkanolamide, (b) general formula
R₁-NH (CH₂) ₃NH₂・ 2R₂-COOH (formula
Middle R₁, R₂Is an alkyl group having 7 to 22 carbon atoms)
N-alkyl trimethylene diamine (hereinafter referred to as N-alkyl
Fatty acid salt)
It has been found that the cleaning agent can solve the above-mentioned problem.

This cleaning agent is added to a hydrocarbon-based solvent in an amount of 0.0
1 to 20% by mass of a fatty acid alkanolamide;
A solution in which 1 to 40% by mass of N-alkyl trimethylenediamine fatty acid salt is dissolved is used as a stock solution, and this stock solution is used as it is or diluted with a hydrocarbon solvent to obtain a solution of 0.01 to 2%.
The cleaning composition for particle removal can contain a fatty acid alkanolamide in an amount of 0.01% by mass and an N-alkyl trimethylenediamine fatty acid salt in an amount of 0.01 to 5% by mass.

Further, when cleaning a part using this cleaning agent, it is effective to use (A) a method of cleaning with a cleaning agent followed by cleaning with a hydrocarbon-based solvent, and (B) a method of cleaning with oil stains. In the case of severe deterioration, it is effective to wash with a hydrocarbon solvent, then with the cleaning agent, and further with a hydrocarbon solvent. (C) Water-soluble dirt such as water-soluble processing oil is severe. In this case, it was found that a method of washing with water, washing with the detergent, and further washing with a hydrocarbon solvent was effective, and completed the present invention.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION As the hydrocarbon solvent used in the present invention, a commercially available hydrocarbon solvent can be used, and there is no particular limitation. However, it is preferable to select a solvent having low environmental pollution.
As such a solvent, a solvent having a main component having a carbon number of 5 to 20, preferably 7 to 16, and particularly preferably 9 to 15 can be used. Those having less than 5 carbon atoms have a low flash point, so there is a large risk of fire or explosion during work and there is a problem in safety. On the other hand, when the number of carbon atoms exceeds 20, the drying property is deteriorated, and the viscosity of the particle detergent composition is increased.

Further, when good drying properties are required, it is desirable to use a hydrocarbon having substantially the same carbon number or a mixture of two types of hydrocarbons having one different carbon number. . Examples of such a hydrocarbon-based solvent include a normal paraffin solvent having 5 to 17 carbon atoms, and a 6 carbon atoms obtained by polymerizing an olefin having 3 or 4 carbon atoms.
To 20 isoparaffin synthesis solvents.

Normal paraffin has 5 to 1 carbon atoms.
7, preferably 7 to 14 carbon atoms, particularly preferably 9 to 13 carbon atoms. If it exceeds 17,
In addition to the poor drying property, the viscosity of the particle detergent composition increases, and the performance of removing particles adhering to the object to be cleaned decreases, which is not preferable. Furthermore, there are some which do not become a solution state unless heated.

The isoparaffin synthesis solvent has 5 carbon atoms.
-20, preferably 8-16, particularly preferably 8-12
In general, it is practical to select an appropriate one from carbon numbers 6, 8, 9, 12, and 16 from the viewpoint of ease of synthesis. In this case, when mixing with a solvent having one different carbon number, use a combination of 8 and 9 or a combination with normal paraffin.

Next, the surfactant used in the present invention is represented by the general formula R ₁ -NH (CH ₂ ) ₃ NH ₂ .2R ₂ -C
An N-alkylpropylenediamine fatty acid salt represented by OOH (wherein R ₁ and R ₂ are alkyl groups having 7 to 22 carbon atoms) and a fatty acid alkanolamide are used in combination.

When the fatty acid alkanolamide and the N-alkylpropylenediamine fatty acid salt alone are dissolved in a hydrocarbon solvent, the fatty acid alkanolamide can be reduced to about 1%.
% By mass, the N-alkylpropylenediamine fatty acid salt dissolves only about 2% by mass. However, when both are mixed, the solubility is dramatically improved to about 20 times. Although the reason for this is not clear, this makes it extremely easy to manufacture the detergent, and to control and maintain the concentration of the surfactant. That is, when producing the particle detergent composition of the present invention, a concentrated product in which a surfactant is dissolved in a hydrocarbon solvent at a high concentration of 40% by mass or more is prepared in advance, and a predetermined surfactant is prepared. It can be diluted to a concentration with a hydrocarbon-based solvent and can be mass-produced in a short time without heating.

By the combined use of fatty acid alkanolamides,
Although the concentration of the surfactant can be greatly improved, if the concentration of the surfactant is too high, the viscosity of the solution becomes remarkably high, which causes a reduction in the particle cleaning performance. With regard to the amount of the N-alkylpropylenediamine fatty acid salt to be added, 0.01 to 5% by mass, preferably 0.5 to 3% by mass provides sufficient particle cleaning performance. When the addition amount is less than 0.01% by mass, the particle cleaning performance tends to be insufficient. On the other hand, if it exceeds 5% by mass, the viscosity of the solution becomes extremely large, and the particle cleaning performance may be reduced.

On the other hand, for fatty acid alkanolamides, 0.01 to 2% by mass, preferably 0.3 to 1% by mass.
Demonstrate sufficient particle cleaning performance. When the addition amount is less than 0.01% by mass, the particle cleaning performance tends to be insufficient. On the other hand, if it exceeds 3% by mass, the viscosity of the solution becomes extremely large, and the particle cleaning performance may be reduced.

The concentration ratio of the fatty acid alkanolamide to the N-alkyl propylene diamine fatty acid salt concentration is 0.01 to 2.0 times, preferably 0.1 to 1.5 times the N-alkyl propylene diamine fatty acid salt concentration. , More preferably in the range of 0.3 to 1.0 times. Within this range, the surfactant concentration can be greatly improved. If this is less than 0.01 times or exceeds 2.0 times, it becomes difficult to increase the surfactant concentration.

Thus, fatty acid alkanolamide and N
-By using a detergent whose solubility balance is adjusted by adding an alkylpropylenediamine fatty acid salt, the particulate matter can be quickly peeled and removed. In addition, polar substances and moisture can be removed.

Further, as an incidental effect of the N-alkylpropylenediamine fatty acid salt and the fatty acid alkanolamide, a rust-preventing action of metal can be mentioned. The rust-preventing action is improved as compared with the case where the N-alkylpropylenediamine fatty acid salt is used alone, and in this sense, it can be said that this is an effective combination.

The alkyl group of the amine component of the N-alkylpropylenediamine fatty acid salt has 7 to 2 carbon atoms.
2, preferably 10-20, more preferably 14-18
It is. Among them, octadecyl propylene diamine, hexadecyl propylene diamine, and tetradecyl propylene diamine can be particularly preferably used because they are easily available.
In addition, fatty acids having 7 to 22, preferably 8 to 20 carbon atoms can be used. Specifically, saturated fatty acids such as octanoic acid, decanoic acid, dodecanoic acid (lauric acid), tetradecanoic acid (myristic acid), hexadecanoic acid (palmitic acid) and octadecanoic acid (stearic acid), and unsaturated fatty acids such as oleic acid Fatty acids can be mentioned. Among these, unsaturated fatty acids such as oleic acid can be preferably used because of their lower melting point.

The N-alkylpropylenediamine fatty acid salt can be synthesized by various methods. For example, the corresponding N-alkyl primary amine and acrylonitrile are
A method in which a reaction is performed at 100 to 200 ° C. using a catalyst, hydrogenation is performed, and a fatty acid is added to the obtained N-alkyldiamine under a nitrogen atmosphere can be employed. The N-alkyl group and the fatty acid do not need to be
There is no problem in using a mixture of more than two kinds or a substance of natural origin. In particular, when beef tallow or vegetable oil is used as a raw material, the raw material is inexpensive, which is preferable in manufacturing a product at low cost.

On the other hand, fatty acid alkanolamides include fatty acids having 7 to 22, preferably 8 carbon atoms.
~ 20 can be used. Specifically, octanoic acid,
Examples thereof include saturated fatty acids such as decanoic acid, dodecanoic acid, tetradecanoic acid, hexadecanoic acid, and octadecanoic acid, unsaturated fatty acids such as oleic acid, mixtures thereof, and naturally occurring fatty acids. Among these, unsaturated fatty acids such as oleic acid can be preferably used because of their lower melting point. Examples of the amine include diethanolamine, monoethanolamine, monoiso-propanolamine, and a mixture thereof. As those obtained from the above fatty acids and amines, dodecanoic acid (lauric acid) monoethanolamide, dodecanoic acid diethanolamide, octadecanoic acid diethanolamide, octadecanoic acid monoethanolamide, oleic acid diethanolamide, oleic acid monoethanolamide, coconut oil Fatty acid diethanolamide, coconut oil fatty acid monoethanolamide, tetradecanoic acid (myristic acid) diethanolamide, tetradecanoic acid monoethanolamide, dodecanoic acid tetradecanoic acid diethanolamide, hexadecanoic acid (palmitic acid) diethanolamide, hexadecanoic acid monoethanolamide, dodecanoic acid Isopropanolamide, iso-octadecanoic acid diethanolamide, iso-octadecanoic acid monoethanolamide, palm kernel oil fatty acid Ethanolamide, but can be exemplified palm kernel oil fatty acid monoethanolamide, etc., dodecanoic acid monoethanolamide Among these, dodecanoic acid diethanolamide is preferable in view of easy availability.

The method for producing fatty acid alkanolamides includes, for example, a method in which a 2-fold molar amount of diethanolamine, monoethanolamine and monoiso-propanolamine is added to a predetermined amount of fatty acid, and the mixture is heated and dehydrated and condensed under a nitrogen stream. Can be used. As in the case of the N-alkylpropylenediamine fatty acid salt, the fatty acid to be used does not need to be a single component, and there is no problem in using a mixture of two or more or a naturally occurring fatty acid.

In order to further improve the detergency against polar fat and oil flux, fat and oily surfactant and the like, which are often used as a binder for adhered particles, an organic compound having a polar group can be added. Examples of the organic compound having a polar group include alcohols, ketones, ethers and esters, and the compounding ratio thereof is about 3 to 50%, preferably about 5 to 30%, and particularly preferably about 10 to 25%.
These organic compounds can be used alone or in combination of two or more.

The polar organic compound has 4 to 4 carbon atoms.
It needs to be 20. If the carbon number is 3 or less, there is a large risk of fire or blast in operation and there is a problem in safety,
On the other hand, if it exceeds 20, the detergency decreases. Among them, those having 6 to 17 carbon atoms, particularly 7 to 15 carbon atoms are preferable.

When alcohol is used as the organic compound having a polar group, the number of hydroxyl groups of the alcohol is 1 or 2
Choose one. When the number of hydroxyl groups is three or more, not only is the polarity too large, so that the detergency is insufficient, but also the solubility in hydrocarbons is lowered, such being undesirable. Specific examples of alcohols include, for example, 2-ethylhexanol, 1-hexanol, 1-octanol,
2-octanol, lauryl alcohol, oleyl alcohol, 2-hepten-1-ol, 10-undecen-1-ol, Guerbet alcohol, 2-cyclo-2-propanol, cycloundecanol, 1,2-dodecanediol, 1 , 2-octadecanediol, 1,16-
Synthetic or natural alcohols such as hexadecanediol and dipropylene glycol are mentioned.

As the ether compound, the hydrogen atom of the hydroxyl group of the alcohol is converted to an alkyl group having 1 to 4 carbon atoms, for example, a methyl group, an ethyl group, an n-propyl group, an i-propyl group, an n-butyl group, an i-butyl group. And a t-butyl group, which are obtained, for example, by reacting a halogenated hydrocarbon corresponding to the above alcohols. Further, a cyclic ether having five or more ring members can also be used. In an ether compound, the number of hydroxyl groups is reduced by replacing a hydrogen atom with a hydrocarbon group. Therefore, when the ether compound has a hydroxyl group, the number of hydroxyl groups is 0.
~ 2 items can be selected. Specific examples of the ether compound include dibutyl ether, propylene glycol monobutyl ether, 1,2-diethoxyethane, 1,8-cineole, diethylene glycol diethyl ether, diethylene glycol dibutyl ether,
Examples include propylene glycol methyl ether, anisole, dihexyl ether, dipentyl ether and the like. As the ketone compound, an alkyl group having 1 to 4 carbon atoms, for example, a methyl group, an ethyl group, an n-propyl group, an i-
Those having a propyl group, an n-butyl group, an i-butyl group, a t-butyl group and an alkyl group having 1 to 15 carbon atoms and having 4 to 20 carbon atoms in the molecule can be used. These can be synthesized by oxidation or catalytic dehydrogenation of the corresponding secondary alcohol.

The ester compound is also an alkyl group having 1 to 4 carbon atoms, for example, a methyl group, an ethyl group, an n-propyl group, an i-
Those having a propyl group, an n-butyl group, an i-butyl group, a t-butyl group and an alkyl group having 1 to 15 carbon atoms and having 5 to 20 carbon atoms in the molecule can be used. These can be synthesized by a dehydration reaction between an organic acid and an alcohol. Specific examples of the ester compound include butyl acetate, isopentyl acetate, 3-methoxybutyl acetate, butyl propionate, butyl butyrate, isopentyl isovalerate, methyl benzoate, diethyl malonate, and ethylene glycol monoacetate.

Further, in order to impart stability to the detergent, a phenolic and / or amine-based antioxidant is added in an amount of 10 to 1000 ppm as needed. A sulfur-based antioxidant is added to the detergent at 10 to 1000 ppm. This makes it possible to obtain a cleaning agent that can withstand use at a high temperature or use for a long period of time.

The parts and the like after the washing may be dried as they are after draining, but when trace amounts of fatty acid alkanolamide, N-alkylpropylenediamine fatty acid salt, etc. become a problem, continue to have 5 to 5 carbon atoms. After being immersed in a hydrocarbon solvent of No. 20, it is dried. Further, if the object to be cleaned is very dirty, the step of cleaning with a hydrocarbon solvent,
Subsequently, the fatty acid alkanolamide and N
-It is preferable to employ a step of washing with a detergent in which an alkyl propylene diamine fatty acid salt is dissolved, and a step of immersing in a hydrocarbon solvent. By doing so, not only can the cleaning efficiency be improved, but also the life of the cleaning agent can be extended.

[0034]

EXAMPLES Hereinafter, the present invention will be described in more detail with reference to examples, but the present invention is not limited thereto.

(Particle Detergency Test Method) Stainless steel plate (SU
S304, 3.0 mm x 12.5 mm x 75 mm) is polished with abrasive particles (blue powder) and the parts to which the particles are attached are cleaned with each cleaning agent 10
It was immersed in 0 mL (beaker), and ultrasonically washed at 40 ° C. (SILENTSONIC UT-304 (39 kHz) manufactured by Sharp Corporation). The washing state was visually observed. The criteria are as follows. ：: particles were completely removed. Δ: Slight particles remain. ×: Not washed at all.

Example 1 The following cleaning agent 1 was prepared.
Then, a test of particle detergency was performed according to the above test method.
Table 1 shows the evaluation results. Particles on the stainless steel plate surface
Had been completely removed.Cleaning agent 1  1st component Commercially available pure hydrocarbon type detergent (normal paraffin type); 98% by mass 2nd component Dodecanoic acid diethanolamide; 0.5% by mass 3rd component Hexadecylpropylenediamine oleate; 1.5% by mass

(Examples 2 and 3) The following cleaning agents 2 and
3 was prepared and subjected to a particle detergency test according to the above test method.
went. Table 1 shows the evaluation results. Grain on the surface of stainless steel plate
The child had been completely removed.Cleaning agent 2  1st component Commercially available pure hydrocarbon detergent (isoparaffin type); 98.5% by mass 2nd component Tetradecanoic acid diethanolamide; 0.5% by mass 3rd component Octadecyl propylene diamine oleate; 1.0% by mass

[0038]Cleaning agent 3  1st component Commercially available pure hydrocarbon detergent (mixed naphthene type); 98.5% by mass 2nd component Tetradecanoic acid diethanolamide; 0.5% by mass 3rd component Oleyl propylenediamine oleate; 1.0% by mass

(Comparative Examples 1 to 5) Kerosene as the detergent 4, a commercially available pure hydrocarbon-based detergent (normal paraffin-based) as the detergent 5, and a commercially available pure hydrocarbon-based detergent (isoparaffin-based) as the detergent 6 Using a commercially available pure hydrocarbon-based cleaning agent (naphthene-based) as the cleaning agent 7 and isopropanol as the cleaning agent 8, a particle cleaning test was performed in accordance with the test method described above. Table 1 shows the evaluation results. It can be seen that when the surfactant of the present invention is not added, sufficient particle cleaning performance cannot be obtained.

(Comparative Example 6) As the detergent 9, a commercially available emulsion-based detergent (water + solvent; 97% by mass, surfactant: 3% by mass) was used, and a test of particle detergency was carried out according to the above test method. went. Table 1 shows the evaluation results. In this case, particles could be completely removed.

(Comparative Example 7) As the cleaning agent 10,
Using 2-trichloroethylene, a test for particle cleanability was conducted according to the test method described above. Table 1 shows the evaluation results.
In this case, particles could be completely removed.

[0042]

[Table 1]

[0043]

EFFECTS OF THE INVENTION The use of the particle detergent of the present invention makes it possible to use a processing oil on a metal workpiece without using a halogenated solvent,
Particles, moisture and water-soluble soils can be quickly removed. Conventionally, it has been difficult to prepare a detergent with a hydrocarbon-based particle detergent, but the hydrocarbon-based particle detergent of the present invention can significantly increase the concentration of a surfactant. By preparing in advance, it is possible to easily manufacture a detergent having a predetermined concentration simply by diluting it with a solvent, and it is extremely easy to manufacture, to manufacture during use, and to control the concentration of a surfactant. High industrial value.

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ identification code FI C23G 5/036 C23G 5/036 (58) Investigated field (Int.Cl. ⁷ , DB name) C11D ^7/ 00-7/60 C11D 10/02 C23G 5/036 H05K 3/26 H01L 21/304

Claims (12)

(57) [Claims] 1. A hydrocarbon solvent comprising (a) a fatty acid alkanolamide, and (b) a general formula R ₁ —NH (CH ₂ ) ₃ N.
H ₂ · _{2R 2} -COOH (wherein _R 1, _{R 2} is 7 carbon atoms
And a N-alkyltrimethylenediamine fatty acid salt represented by formula (22). 2. The method according to claim 1, wherein the hydrocarbon solvent has 5 to 20 carbon atoms.
The detergent composition for removing particles according to claim 1, which is a hydrocarbon. 3. The particles according to claim 2, wherein the hydrocarbon-based solvent is a hydrocarbon having substantially the same carbon number or a mixture of hydrocarbons having two different carbon numbers. A cleaning composition for removal. 4. A stock solution obtained by dissolving both 0.01 to 20% by mass of a fatty acid alkanolamide and 0.01 to 40% by mass of an N-alkyl trimethylenediamine fatty acid salt in a hydrocarbon solvent. This undiluted solution is used as it is or diluted with a hydrocarbon-based solvent to obtain a particle-removing wash containing 0.01 to 2% by mass of a fatty acid alkanolamide and 0.01 to 5% by mass of an N-alkyl trimethylenediamine fatty acid salt. For producing an agent composition. 5. The method according to claim 1, wherein the hydrocarbon solvent has 5 to 20 carbon atoms.
The method for producing a detergent composition for removing particles according to claim 4, which is a hydrocarbon. 6. The particles according to claim 5, wherein the hydrocarbon solvent is a hydrocarbon having substantially the same carbon number or a mixture of hydrocarbons having two different carbon numbers. A method for producing a cleaning composition for removal. (A) a fatty acid alkanolamide,
(B) General formula R ₁ —NH (CH ₂ ) ₃ NH ₂ .2R ₂ —
Washing with a hydrocarbon solvent containing both N-alkyl trimethylene diamine fatty acid salt represented by COOH (wherein R ₁ and R ₂ are alkyl groups having 7 to 22 carbon atoms);
Subsequently, a cleaning method for removing particles comprising a step of cleaning with the hydrocarbon solvent. 8. The method according to claim 1, wherein the hydrocarbon solvent has 5 to 20 carbon atoms.
The cleaning method for removing particles according to claim 7, which is a hydrocarbon. 9. The particle according to claim 8, wherein the hydrocarbon-based solvent is a hydrocarbon having substantially the same carbon number or a mixture of hydrocarbons having two different carbon numbers. Cleaning method of removal. 10. A step of washing with a hydrocarbon solvent or water, (a) a fatty acid alkanolamide, (b) a general formula R ₁ —NH (CH ₂ ) ₃ NH ₂ .2R ₂ —COOH (wherein R ₁ , R ₂ consists of a step of washing with the hydrocarbon solvent containing a combination of both N- alkyl trimethylene diamine fatty acid salt represented by the alkyl group) of 7 to 22 carbon atoms, a step of washing with hydrocarbon solvents particles Cleaning method of removal. 11. The method according to claim 1, wherein the hydrocarbon solvent has 5 to 2 carbon atoms.
The cleaning method according to claim 10, wherein the hydrocarbon is 0. 12. The particles according to claim 11, wherein the hydrocarbon-based solvent is a hydrocarbon having substantially the same carbon number or a mixture of hydrocarbons having two different carbon numbers. Cleaning method of removal.