KR102036089B1 - Cleaning composition - Google Patents

Abstract

The present invention provides a cleaning composition comprising a high boiling point organic solvent and two or more amines.

Description

Cleaner Composition {CLEANING COMPOSITION}

The present invention relates to a cleaning composition.

In general, in the case of paint pipes used for automobile body coating, etc., the main pipe is used as a pipe for transporting paint to the coating site. In addition, a plurality of branch pipes are formed by connecting a plurality of pipes, and a regulator and a spray gun for spraying a paint may be disposed at the intermediate part thereof.

As such, in a line for coating paint, various cleaning compositions, such as cleaning thinners, have been developed for cleaning pipes after paint coating.

In the paint pipe, aggregates of paint can be attached to the inner wall surface of the pipe for a long time. Such paint aggregates can cause paint failure by not only lowering the spray pressure of the paint but also attaching the coated material together with the paint. In order to remove such aggregates, cleaning of the paint pipe is necessary. For this purpose, according to the cleaning method of the prior art, the paint is extracted from all members constituting the tank, the main pipe, the branch pipe, and the like, and the cleaning thinner is circulated through the paint pipe. However, by simply circulating the cleaning thinner, it is not possible to remove the paint aggregates firmly attached to the pipe, in which case it is possible to clean the pipe using a specific acidic cleaner based on a chlorine-containing solvent. However, the use of such a chlorine-containing solvent is harmful, so there is a risk in cleaning, and disposal of it may cause environmental damage. In addition, since the chlorine-containing cleaner is strongly acidic to corrode the pipe, cumbersome post-treatment such as reduction treatment, neutralization treatment and rust prevention treatment is required after washing.

As another example of a pipe cleaning thinner, there is a method of removing residual paint by circulating through a pipe using a cleaning composition containing butyl cellussolve, isopropyl alcohol, and an aliphatic amine as an organic solvent. However, when the detergent composition is diluted with water, the use of a large amount of the detergent composition in water is required, and despite the large amount of use, it may be difficult to completely remove the water-based paint residue in the pipe.

Accordingly, there is a need for a cleaner composition having excellent cleaning power even if the content of volatile organic compounds (VOC) is reduced and a small amount of the detergent composition is diluted with water.

Republic of Korea Patent Publication No. 2013-0025913

The present invention provides a detergent composition that is environmentally friendly and can exhibit excellent cleaning power.

The present invention provides a cleaning composition comprising an organic solvent having a boiling point of 130 to 350 ° C., a first amine including a tertiary amine, and a second amine including at least one of primary or secondary amines.

Cleaning composition according to an embodiment of the present invention can reduce the content of Volatile Organic Compounds (VOC), and can further improve the cleaning power even using a small amount.

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

The terms or words used in this specification and claims are not to be construed as limiting in their usual or dictionary meanings, and the inventors may appropriately define the concept of terms in order to best explain their invention in the best way possible. It should be interpreted as meaning and concept corresponding to the technical idea of the present invention based on the principle that the present invention.

Cleaning composition according to an embodiment of the present invention comprises a second amine comprising at least one of a primary amine and a primary or secondary amine and an organic solvent having a boiling point of 130 to 350 ℃ and a tertiary amine Detergent compositions comprising two or more amines.

Cleaning composition according to an embodiment of the present invention can reduce the content of Volatile Organic Compounds (VOC) by using a high boiling point organic solvent in the above range, two or more amines having a different number of substituted hydrocarbon groups By using a mixture of dilution ratio with water can be reduced. In addition, detergent compositions containing these components are excellent in cleanability and can effectively and easily remove paint residues in piping.

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

The detergent composition according to the present invention includes an organic solvent having a boiling point of 130 to 350 ° C., specifically 160 to 250 ° C., thereby reducing the content of the volatile organic compound and easily dissolving the resin contained in the paint, thereby improving cleaning power. It can be further improved.

If the boiling point of the organic solvent exceeds the above range, when the cleaning composition after use is regenerated by fractionation, the required energy is excessively increased or a high boiling point component does not flow out during regeneration. The recovery rate of can be lowered. In addition, it may be difficult to stably obtain a detergent composition having sufficient detergency. In addition, when the boiling point is less than the above range, the volatilization amount may increase, and there may be a problem in that the cleaning power is reduced.

According to one embodiment of the invention, the organic solvent may be a glycol ether polyhydric alcohol having a boiling point in the above range, more specifically ethylene glycol-monoethyl ether, butyl carbitol, ethyl carbitol, propylene glycol- Methyl ether acetate, dipropylene glycol-methyl ether, triethylene glycol, ethylene glycol monobutyl ether, propylene glycol monopropyl ether, tripropylene glycol methyl ether, dipropylene glycol propyl ether, propylene glycol butyl ether, di One or more selected from propylene glycol-butyl ether, dipropylene glycol-propyl ether, propylene glycol-phenyl ether, propylene glycol diacetate, and dipropylene glycol-dimethyl ether. More specifically, the organic solvent may have a weight average molecular weight of 140 to 210 g / mol, a viscosity (25 ℃) of 1 to 6 cps. More specifically, the organic solvent is selected from butyl carbitol, ethyl carbitol, dipropylene glycol-methyl ether, dipropylene glycol-propyl ether, propylene glycol-phenyl ether, propylene glycol diacetate and dipropylene glycol-dimethyl ether. It may include any one or more. Since the organic solvent used according to an embodiment of the present invention is not affected by the deterioration of the detergency by water, even when water is added after the preparation of the detergent, the excellent detergency originally possessed by the organic solvent can be effectively exhibited. .

Meanwhile, the cleaner composition according to an embodiment of the present invention includes two or more amines including a first amine including a tertiary amine and a second amine including at least one or more of a primary or secondary amine. The amount of the composition can be significantly reduced to implement environmentally friendly properties. The two or more amines may play a role as a pH adjusting agent, and may play a role of helping to dissolve the resin contained in the paint well by improving compatibility with water.

 According to an embodiment of the present invention, the first amine including the tertiary amine may have a weight average molecular weight of 140 to 180 g / mol, a viscosity (25 ℃) of 500 to 650cps, pH of 9 to 13 .

In addition, the first amine is a tertiary amine, specifically, for example, at least one selected from triethanolamine, triethylenediamine, N, N-ditertbutylaniline, trimethylamine and tributylamine can do.

According to an embodiment of the present invention, the second amine may have a weight average molecular weight of 70 to 170 g / mol, a viscosity (25 ° C) of 1 to 10cps, pH of 9 to 13.

In addition, the second amine includes any one or more of primary and secondary amines, for example, N, N-dimethylethanolamine, N, N-diisopropylamine (N, N-diisopropylamine) , Diethanolamine, diphenylamine, diethylamine, aminopentane, and butylamine.

If the detergent composition includes only one amine, that is, the first amine or the second amine, the cleaning power may be significantly reduced, and a large amount of the detergent composition may be required by increasing the dilution ratio of water.

The mixing ratio of the first amine and the second amine may be in the range of 1.5: 1 to 6: 1 weight ratio. When the mixing ratio in the above range can be used to effectively improve the cleaning power even with the use of a small amount of the cleaning composition, it can implement environmentally friendly.

On the other hand, the mixing ratio of the two or more amines including the organic solvent, the first amine and the second amine may be 60 to 80: 20 to 40 by weight. If the content of the organic solvent is too high, compatibility with water may decrease, and if the content of the organic solvent is too small, the cleaning power may decrease.

When the detergent composition is diluted in water, in order to improve not only compatibility with water but also cleaning power, the detergent composition according to an embodiment of the present invention may be, for example, 15 to 30 parts by weight of the first amine and the second amine. It may include 5 to 10 parts by weight and 60 to 80 parts by weight of the organic solvent.

As such, the detergent composition according to one embodiment of the present invention may be used by diluting by mixing with water. When water is used as a diluent, it can be an environmentally friendly way to avoid the regulation of organic compounds. The water may use deionized water or pure water without exception.

When the detergent composition is diluted with water according to one embodiment of the present invention, the mixing ratio of water and the detergent composition may be 90 to 98: 2 to 10 weight ratio. That is, when the detergent composition including the composition of the present invention is diluted with water, the amount of the detergent composition can be reduced by 80% or more as compared to the detergent composition containing only a low boiling point organic solvent or one amine. Even when a small amount of the cleaning composition is used, the cleaning power can be significantly improved.

The detergent composition according to an embodiment of the present invention may have a pH of 9 to 13, and may satisfy the above range to effectively remove the water-based paint residue in the pipe.

In addition, since the cleaning composition of the present invention has little interference with the water-based paint and when diluted with water, the cleaning composition can be improved even with a small amount, it is particularly useful for piping such as paint robots and spray guns. Can be applied.

Hereinafter, the present invention will be described in detail with reference to Examples. However, embodiments according to the present invention can be modified in many different forms, the scope of the present invention should not be construed as limited to the embodiments described below. The embodiments of the present invention are provided to more completely explain the present invention to those skilled in the art.

Example

Example  One

A detergent composition was prepared using each component and content according to Table 1 below.

In detail, as the organic solvent, butylcarbitol having a boiling point of 230 ° C. was added to the reactor, and triethanolamine, which is a tertiary amine, was slowly added thereto under stirring. Then, N, N-dimethylethanolamine, a secondary amine, was slowly added to the reactor. The mixture was stirred for 10 minutes and then filtered with a 400 mesh filter to prepare a detergent composition. Dilution was added to the composition by adding distilled water to the content shown in Table 1.

Example  2 to 10

As shown in Table 1, butyl carbitol And a detergent composition was prepared in the same manner as in Example 1, except that the content of the two amines was changed. Dilution was added to the composition by adding distilled water to the content shown in Table 1.

Example  11 to 12

A detergent composition was prepared using each component and content according to Table 1 below.

Specifically, after the propylene glycol-acetate having a boiling point of 160 ° C. was added to the reactor as an organic solvent, triethanolamine, which is a tertiary amine, was slowly added thereto under stirring. Then, N, N-dimethylethanolamine, a secondary amine, was slowly added to the reactor. The mixture was stirred for 10 minutes and then filtered with a 400 mesh filter to prepare a detergent composition. Dilution was added to the composition by adding distilled water to the content shown in Table 1.

Example  13

A detergent composition was prepared using each component and content according to Table 1 below.

In detail, as the organic solvent, butylcarbitol having a boiling point of 230 ° C. was added to the reactor, and triethanolamine, which is a tertiary amine, was slowly added thereto under stirring. Then, aminopentane, the primary amine, was slowly added to the reactor. The mixture was stirred for 10 minutes and then filtered with a 400 mesh filter to prepare a detergent composition. Dilution was added to the composition by adding distilled water to the content shown in Table 1.

Comparative example  1 to 9

As shown in Table 2, except that the content of the organic solvent, amine, and water was changed, the cleaning composition was prepared in the same manner as in Example 1.

Dilution was added to the composition by adding distilled water in the amounts shown in Table 2.

division ingredient Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Example 7 Example 8 Example 9 Example 10 Example
11 Example
12 Example
13 abandonment
solvent Butyl Carbitol 2.28 2.45 2.63 2.63 2.27 2.45 2.28 2.8 5.2 1.3 2.63 Propylene Glycol-Diacetate 2.28 2.45 Amine Triethanolamine 0.87 0.7 0.56 0.61 0.95 0.86 1.03 0.53 2 0.5 0.87 0.7 0.56 N, N-dimethylethanolamine 0.35 0.35 0.31 0.26 0.28 0.19 0.19 0.2 0.8 0.2 0.35 0.35 Aminopentane 0.31 water Distilled water 96.5 96.5 96.5 96.5 96.5 96.5 96.5 96.47 92 98 96.5 96.5 96.5 total 100 100 100 100 100 100 100 100 100 100 100 100 100 1) Butyl carbitol: boiling point: 230 ° C., weight average molecular weight: 162 g / mol, viscosity (25 ° C.): 1.3 cps
2) Propylene glycol diacetate: boiling point: 161 ° C, weight average molecular weight: 160 g / mol ,, viscosity (25 ° C): 1.1 cps
3) Triethanolamine: weight average molecular weight: 149 g / mol, viscosity (25 ℃): 590cps, pH: 11
4) N, N Dimethylethanolamine: Weight average molecular weight: 89 g / mol, Viscosity (25 ° C.): 5 cps, pH: 11
5) aminopentane: weight average molecular weight: 87g / mol, viscosity (25 ℃): 3cps, pH: 11

division ingredient Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Comparative Example 5 Comparative Example 6 Comparative Example 7 Comparative Example 8 Comparative Example 9 Organic solvent Butyl Carbitol - 2.28 2.28 2.28 - 2.26 1.7 9.75 2.28 Isopropyl Alcohol 8.7 - - - - - - - - Butyl Cell Solution 13.6 - - - 2.28 - - - - Amine Triethanolamine - 1.22 - 0.87 0.87 0.62 1.3 3.75 0.87 N, N-dimethylethanolamine 0.7 - 1.22 - 0.35 0.62 0.5 1.5 AMP95
(Amino methyl propanol) 0.35 Methylamine 0.35 water Distilled water 77 96.5 96.5 96.5 96.5 96.5 96.5 85 96.5 total 100 100 100 100 100 100 100 100 100 1) Butyl carbitol: boiling point: 230 ° C., weight average molecular weight: 162 g / mol, viscosity (25 ° C.): 1.3 cps
2) Isopropyl alcohol: boiling point: 82 ° C., weight average molecular weight: 60 g / mol, viscosity (25 ° C.): 1.1 cps
3) Butyl Cellulsolve: 171 ° C, Weight average molecular weight: 118g / mol, Viscosity (25 ° C): 1.2cps
4) Triethanolamine: weight average molecular weight: 149 g / mol, viscosity (25 ° C): 590 cps, pH: 11
5) N, N Dimethylethanolamine: Weight average molecular weight: 89 g / mol, Viscosity (25 ° C.): 5 cps, pH: 11
6) AMP95 (aminomethylpropanol): weight average molecular weight: 89 g / mol, viscosity (25 ℃): 147 cps, pH: 11
7) Methylamine: weight average molecular weight: 31 g / mol, viscosity (25 ℃): 2cps, pH: 11

Experimental Example

1) Evaluation of cleaning power for pipe cleaning

The specimen of 50mm x 150mm size was immersed in the water-based automotive paint made of acrylic and melamine for 30 seconds and left for 5 minutes, and then immersed in each of the cleaning compositions prepared in Examples and Comparative Examples for 20 seconds, thereby providing a cleaning power (% ) Was evaluated according to the weight change before and after washing (the greater the change in weight, the better the cleaning ability). The results are shown in Table 3 below.

Cleaning power Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Example 7 Example 8 Example 9 Example 10 Example 11 Example 12 Example 13 71% 68% 65% 64% 68% 67% 68% 69% 69% 62% 63% 61% 62% Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Comparative Example 5 Comparative Example 6 Comparative Example 7 Comparative Example 8 Comparative Example 9 34% 54% 52% 27% 50% 52% 55% 47% 51%

As can be seen in Table 3, the cleaning composition of Examples 1 to 13 using two or more amines having a high boiling point organic solvent and a specific boiling point can be confirmed that the pipe cleaning power is superior to Comparative Examples 1 to 9. there was.

2) Evaluation of cleaning power for tank wall cleaning

50 mm x 150 mm sized specimens were prepared, and then the pipette was filled with the detergent compositions prepared in Examples and Comparative Examples, respectively. Thereafter, the specimen was inclined at an angle of 45 degrees, and the distance between the pipette and the specimen was fixed at 25 cm, and then the dropping amount of the cleaning composition was dropped one by one to check the number of drops of the cleaning composition when the steel sheet was exposed. The results are shown in Table 4 below.

Number of drops Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Example 7 Example 8 Example 9 Example 10 Example 11 Example 12 Example 13 16th 18 times 20 times 20 times Episode 19 18 times 18 times Episode 19 20 times Episode 21 Episode 23 24 times Episode 23 Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Comparative Example 5 Comparative Example 6 Comparative Example 7 Comparative Example 8 Comparative Example 9 Episode 28 Episode 26 Episode 28 Episode 28 Episode 26 Episode 26 Episode 29 25 times Episode 28

As can be seen in Table 4, the cleaning composition of Examples 1 to 13 using two or more amines having a high boiling point organic solvent and a specific boiling point can be seen that the steel sheet is revealed in less than 25 times the number of drops there was. On the contrary, the cleaning composition of Comparative Examples 1 to 9 was found to drop 25 times to 29 times in all to reveal the steel sheet.

Claims (6)

An organic solvent having a boiling point of 130 to 350 ° C.,
A first amine comprising a tertiary amine, and
A second amine comprising at least one or more of primary or secondary amines,
The mixing ratio of the first amine and the second amine is a weight ratio of 1.5: 1 to 6: 1,
15 to 30 parts by weight of the first amine, 5 to 10 parts by weight of the second amine and 60 to 80 parts by weight of the organic solvent.
delete The method according to claim 1,
The mixing ratio of the organic solvent and two or more amines is 60 to 80: 20 to 40 weight ratio of the cleaning composition.
delete The method according to claim 1,
The detergent composition is used in combination with water cleaning composition.
The method according to claim 5,
The mixing ratio of the water and the detergent composition is 90 to 98: 2 to 10 by weight ratio.