KR101579786B1 - Paint stripping composition, production method thereof and stripping method using the composition - Google Patents
Paint stripping composition, production method thereof and stripping method using the composition Download PDFInfo
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- KR101579786B1 KR101579786B1 KR1020150070772A KR20150070772A KR101579786B1 KR 101579786 B1 KR101579786 B1 KR 101579786B1 KR 1020150070772 A KR1020150070772 A KR 1020150070772A KR 20150070772 A KR20150070772 A KR 20150070772A KR 101579786 B1 KR101579786 B1 KR 101579786B1
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D9/00—Chemical paint or ink removers
- C09D9/005—Chemical paint or ink removers containing organic solvents
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Abstract
Description
The present invention relates to a composition for peeling paint, a method for producing the same, and a method for selectively peeling paint from a painted product using the same.
Generally, a large amount of various parts used in automobiles, household appliances, daily necessities and other fields are coated on the surface of plastic resin. The coating material used for coating these plastic resins is mostly used as a thermosetting coating material due to the coating property and the adhesion with the plastic resin which is an adhered material. In order to recycle the thermoplastic resin used as the material, Recycling is almost impossible with the processing method.
Accordingly, various methods have been tried to overcome these problems. As a method for effectively peeling a coating film, a coating film peeling by a chemical method is generally used.
Particularly, a ball made of polytetrafluoroethylene (PTFE) is used as a masking ball used in a masking process of a coating line such as an automobile wheel, and the surface of the Teflon ball is contaminated due to coating during a coating operation. Therefore, when the used Teflon balls are reused, the contaminated paint on the surface of the Teflon balls is removed as a releasing agent selectively releasable to the paint film, and then reused.
However, the conventional paint stripper has a problem that the surface of the Teflon can not be reused because of its strong acidity or basicity when it is used in Teflon. In particular, there is a problem that the paint film formed on the surface of the Teflon ball can be peeled off without damaging the surface of the Teflon ball A composition is required.
Accordingly, it is an object of the present invention to provide a composition for peeling paint, which is peeled off from the surface of the plastic paint without damaging the surface of the plastic resin, taking the technical requirements into consideration.
Another object of the present invention is to provide a method for producing the paint peeling composition.
Another object of the present invention is to provide a method for selectively peeling a coating film formed on the surface of an article using the composition for peeling off the paint.
According to an aspect of the present invention,
100 parts by weight of water;
Based on 100 parts by weight of the water, at least one member selected from the group consisting of methanol, ethanol, propanol, isopropyl alcohol, butyl alcohol, pentanol, hexanol, heptanol, ethyl alcohol, ethylene glycol, propylene glycol, glycerol, erythol, xylitol, 100 to 200 parts by weight of at least two alcohols selected from diethylene glycol, triethylene glycol, tetraethylene glycol, polyol, dipropylene glycol, pentaethylene glycol, hexaethylene glycol, tripropylene glycol, polyvinyl alcohol and polyethylene glycol;
10 to 20 parts by weight of an inorganic alkali hydroxide, based on 100 parts by weight of the water; And
And 15 to 25 parts by weight of methylene chloride based on 100 parts by weight of the water.
Preferably, the alcohols may include 80-100 parts by weight of isopropyl alcohol and 50-70 parts by weight of methanol based on 100 parts by weight of the water.
Also preferably, the inorganic alkali hydroxide may be at least one or more selected from the group consisting of lithium hydroxide, sodium hydroxide and potassium hydroxide.
Also preferably, the composition is characterized in that it is for peeling off a coating film formed on a polytetrafluoroethylene base material.
According to another aspect of the present invention,
1) adding 10 to 20 parts by weight of an inorganic alkali hydroxide to 100 parts by weight of water based on 100 parts by weight of the water, heating the mixture to 40 to 50 degrees Celsius and then stirring to dissolve the inorganic alkali hydroxide; And
2) 100 to 200 parts by weight of at least two alcohols and 15 to 25 parts by weight of methylene chloride are added to the dissolution solution after the first step, based on 100 parts by weight of the water, followed by stirring to prepare a release composition; , ≪ / RTI >
Wherein the peeling composition is a composition for peeling the paint described above.
According to another aspect of the present invention,
a) removing the coating film formed on the surface of the article by putting the peeling article into the composition for peeling off the paint and leaving it standing;
b) after the step a), the step of re-stripping the coating film remaining on the surface of the article by adding hydrogen peroxide and leaving it standing; And
and c) removing the article after the step b), and then washing the article. The present invention also relates to a method for selectively removing a coating film formed on a surface of an article.
Preferably, the surface of the article is made of one kind of plastic material selected from the group consisting of polypropylene, acrylic resin, polyamide, polyoxymethylene, polycarbonate or polytetrafluoroethylene.
The composition for stripping paint according to the present invention has an effect of exhibiting excellent peeling performance without damaging the surface of the plastic resin.
Further, when the peeling method using the paint peeling composition of the present invention is used, there is no damage to the surface of the coating material such as a Teflon ball, so that the coating material can be continuously reused.
1 is a photograph of a paint-contaminated teflon ball, according to an embodiment of the present invention.
FIG. 2 is a photograph of a state in which a paint-contaminated Teflon ball is immersed in a paint peeling composition according to an embodiment of the present invention.
FIG. 3 is a photograph of a Teflon ball taken out from a paint peeling composition according to an embodiment of the present invention.
FIG. 4 is a photograph of a teflon ball which is prepared by adding hydrogen peroxide to a composition for peeling off a paint, removing it from the paint, and washing it. FIG.
Hereinafter, the present invention will be described in detail.
The present invention relates to a composition for peeling a neutral paint which can solve the problem that the composition for peeling off the paint is strongly acidic or basic and damages the surface of the base material, particularly the surface of the plastic base material, .
Thus, according to one aspect of the present invention, there is provided a composition comprising: 100 parts by weight of water; Based on 100 parts by weight of the water, at least one member selected from the group consisting of methanol, ethanol, propanol, isopropyl alcohol, butyl alcohol, pentanol, hexanol, heptanol, ethyl alcohol, ethylene glycol, propylene glycol, glycerol, erythol, xylitol, 100 to 200 parts by weight of at least two alcohols selected from diethylene glycol, triethylene glycol, tetraethylene glycol, polyol, dipropylene glycol, pentaethylene glycol, hexaethylene glycol, tripropylene glycol, polyvinyl alcohol and polyethylene glycol; 10 to 20 parts by weight of an inorganic alkali hydroxide, based on 100 parts by weight of the water; And 15 to 25 parts by weight of methylene chloride based on 100 parts by weight of the water.
The alcohols facilitate the peeling of the coating film by swelling a soft segment forming a coating film, and include alcohols in which two or more selected from alcohols or polyhydric alcohols are mixed, and the content of alcohols is less than 100 parts by weight And when the content of the alcohol is more than 200 parts by weight, there is a problem that the surface of the substrate is damaged or the amount of evaporation is high, resulting in a high cost incurred in productivity. For example, when the coating film on the surface of the Teflon ball for peeling is peeled off, if it is below the alcohol content, it reacts very finely with the coating adhered to the teflon ball and does not peel off even if it is immersed for 48 hours or more. Particularly, after immersing in urethane, polypropylene, and epoxy paint for 96 hours, it was found that there was a trace of reaction but it was almost not peeled off. Also, when the content of alcohol exceeds the range of alcohol content, it is effective for exfoliating the applied paint due to strong penetration into the adhered paint, but the appearance hardness of the Teflon ball is lowered and there is a danger of explosion due to rapid reaction when added with hydrogen peroxide
Preferably, 80 to 100 parts by weight of isopropyl alcohol and 50 to 70 parts by weight of methanol are contained based on 100 parts by weight of the water. Particularly, isopropyl alcohol is non-polar and has high dissolving power and excellent cleaning ability, so that it has high penetration power during methanol and dilution, disperses adhered paint particles, and increases product stability.
Further, in the present invention, the inorganic alkali hydroxide serves as an alkali reactant to neutralize the peeling composition, thereby preventing the surface of the substrate from being damaged, allowing penetration into the polymer component constituting the coating film, Is used as a component for improving the adhesion. At this time, the inorganic alkali hydroxide should be contained in an amount of 10 to 20 parts by weight based on 100 parts by weight of the water. If the amount is less than the above range, penetration ability is deteriorated to deteriorate the peeling performance, so that the peeling process must proceed at a high temperature and the peeling time becomes long. When the above range is exceeded, the swelling phenomenon becomes serious and moisture or the organic solvent evaporates during the peeling step, so that it is precipitated as solid content and may cause damage to the surface of the substrate. At this time, the inorganic alkali hydroxide may be at least one or more selected from the group consisting of lithium hydroxide, sodium hydroxide and potassium hydroxide. In one embodiment of the present invention, 14.3 parts by weight of sodium hydroxide is used based on 100 parts by weight of water to improve its role as an alkali reactant and to improve the peeling effect, so that the peeling process is performed at a temperature range of 40 to 45 And the peeling time is also from 1 to 3 minutes, so that the efficiency of the peeling process can be improved and the cost can be reduced.
In the present invention, the methylene chloride is a component for peeling off the coating film formed on the surface of the substrate by reacting with the coating film, and the amount of the methylene chloride is 15 to 25 parts by weight based on 100 parts by weight of the water. If the amount is below the above range, the reaction with the coating film is not performed well and the peeling performance is deteriorated.
In addition, in the present invention, the peeling composition is particularly suitable for peeling a coating film formed on the surface of a plastic resin substrate, and preferably the composition is a composition for peeling paint for peeling a coating film formed on a polytetrafluoroethylene substrate to be.
The paint stripping composition of the present invention is prepared by dissolving an inorganic alkali hydroxide in water, adding an alcohol and methylene chloride, and stirring.
Therefore, according to another aspect of the present invention, there is provided a process for the preparation of an alkali metal hydroxide composition, comprising the steps of: 1) adding 10 to 20 parts by weight of inorganic alkali hydroxide to 100 parts by weight of water based on 100 parts by weight of water, heating to 40 to 50, Dissolving the lockside; And 2) adding 100 to 200 parts by weight of at least two alcohols and 15 to 25 parts by weight of methylene chloride based on 100 parts by weight of the water to the dissolving solution after the first step and then stirring to prepare the exfoliating composition , Wherein the release composition prepared is a composition for peeling off the paint described above.
The paint peeling composition of the present invention can selectively remove the coating film formed on the surface of the article by immersing the article to be peeled, treating hydrogen peroxide once more, and then washing it.
Therefore, according to another aspect of the present invention, there is provided a method for peeling off a paint, comprising the steps of: (a) removing a coating film formed on a surface of the article by putting the peeling article into a composition for peeling off the paint; b) after the step a), the step of re-stripping the coating film remaining on the surface of the article by adding hydrogen peroxide and leaving it standing; And c) removing the article after the step b), and then washing the article.
In the step (a) of the present invention, the article is dipped in the paint peeling composition to swell the coating film formed on the surface of the article while allowing the coating film and the paint peeling composition to react and peel off, 1 to 10 hours.
In the step b) of the present invention, the coating film partially peeled off from the peeled product by the peel-off composition in the step a) is completely peeled off, and hydrogen peroxide is added . At this time, the above-mentioned temperature is preferably 30 minutes to 1 hour.
Also, in the step c) of the present invention, after the article having been subjected to the step b) is removed, the article is peeled off by washing.
In the present invention, the surface of the article may be made of one kind of plastic material selected from the group consisting of polypropylene, acrylic resin, polyamide, polyoxymethylene, polycarbonate or polytetrafluoroethylene. Most preferably, the article may be a polytetrafluoroethylene-based ball.
Hereinafter, the present invention will be described in detail with reference to examples, but the scope of the present invention is not limited thereto.
≪ Example 1 > Preparation of composition for peeling paint
Sodium hydroxide was added to the weight of water, heated to 45 degrees Celsius, stirred until sodium hydroxide was completely dissolved, and then cooled to 20 degrees Celsius. Next, isopropyl alcohol (IPA), methylene chloride (MC) and methanol (MT) were added, followed by stirring for about 2 hours to prepare a paint peeling composition. The prepared composition showed a pH of 6.5-7.
The composition and content of the composition according to this example are shown in Table 1 below.
≪ Comparative Example 1 &
The composition for peeling paint was prepared in the same manner as in Example 1, except that the content of isopropyl alcohol and methyl alcohol was 20% and 10%, respectively.
≪ Test Example 1 > Peeling using a paint peeling composition
Teflon balls (Diofron, Korea), which is used in automobile coating line and contaminated with paint, were prepared.
The prepared Teflon balls were placed in the paint peeling composition prepared in Example 1 and allowed to stand for 1 hour. Next, 3% hydrogen peroxide was added thereto, and after leaving for 5 minutes, the Teflon ball was taken out and washed to separate the contamination film formed on the Teflon ball.
FIG. 1 shows a photograph of a Teflon ball impregnated with the above-mentioned paint, and it can be confirmed that the Teflon ball is painted on the entire ball.
FIG. 2 is a photograph showing the injection of Teflon balls into the paint peeling composition.
FIG. 3 is a photograph of the Teflon ball taken out from the paint peeling composition. Referring to FIG. 3, it can be confirmed that the coating film is peeled off.
FIG. 4 shows photographs of Teflon balls which were prepared by adding hydrogen peroxide to the composition for peeling off the paint, taken out, and washed. Referring to FIG. 4, it can be seen that the coating film remaining on the Teflon ball was completely peeled off and the Teflon ball was bleached.
≪ Test Example 2 > Peeling using a paint peeling composition
In order to confirm the peeling effect, the contaminated paint film was peeled off in the same manner as in Test Example 1 by using the paint peeling composition prepared in Example 1 and Comparative Example 1 and a commercially available paint stripper.
The degree of peeling was measured at the ratio of the peeled area according to the peeling time, and it is shown in Table 2 below.
Referring to Table 2, when the peeling composition according to an embodiment of the present invention was used, the peeling was completely completed after 1 hour, but in Comparative Example 1, it was confirmed that only about 30% And 80% after 4 hours had elapsed, indicating that it was not completely peeled off. As compared with the commercially available product, the peeling degree of 35% was shown as a ratio after 4 hours, and it was confirmed that it was only 69% even after 8 hours. This indicates that when the coating film is peeled off using the peeling composition according to the present invention, the peeling effect of the Teflon can be remarkably improved and the peeling can be completed in a short time.
As described above, the paint peeling composition according to the present invention exhibits a neutral pH, and when applied to the surface of a plastic resin such as Teflon balls, the paint can be selectively and cleanly peeled without causing damage to the surface, It is possible to exhibit an excellent peeling effect as much as possible, and it can be confirmed that the peeling efficiency can be remarkably improved.
The present invention is not limited to the above-described embodiments, and various changes and modifications may be made without departing from the spirit and scope of the present invention. It can be understood that It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive.
Claims (7)
Based on 100 parts by weight of the water, at least one member selected from the group consisting of methanol, ethanol, propanol, isopropyl alcohol, butyl alcohol, pentanol, hexanol, heptanol, ethyl alcohol, ethylene glycol, propylene glycol, glycerol, erythol, xylitol, 100 to 200 parts by weight of at least two alcohols selected from diethylene glycol, triethylene glycol, tetraethylene glycol, polyol, dipropylene glycol, pentaethylene glycol, hexaethylene glycol, tripropylene glycol, polyvinyl alcohol and polyethylene glycol;
10 to 20 parts by weight of an inorganic alkali hydroxide, based on 100 parts by weight of the water; And
And 15 to 25 parts by weight of methylene chloride based on 100 parts by weight of the water.
Wherein the alcohol comprises 80 to 100 parts by weight of isopropyl alcohol and 50 to 70 parts by weight of methanol based on 100 parts by weight of the water.
Wherein the inorganic alkali hydroxide is at least one or more selected from the group consisting of lithium hydroxide, sodium hydroxide and potassium hydroxide.
Wherein the composition is for peeling a coating film formed on a polytetrafluoroethylene substrate.
2) 100 to 200 parts by weight of at least two alcohols and 15 to 25 parts by weight of methylene chloride are added to the dissolution solution after the first step, based on 100 parts by weight of the water, followed by stirring to prepare a release composition; , ≪ / RTI >
Wherein the peel composition is a composition according to any one of claims 1 to 4.
b) after the step a), the step of re-stripping the coating film remaining on the surface of the article by adding hydrogen peroxide and leaving it standing; And
and c) removing the article after the step b), and washing the article.
Characterized in that the surface of the article is made of one kind of plastic material selected from the group consisting of polypropylene, acrylic resin, polyamide, polyoxymethylene, polycarbonate or polytetrafluoroethylene. / RTI >
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| Application Number | Priority Date | Filing Date | Title |
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| KR1020150070772A KR101579786B1 (en) | 2015-05-21 | 2015-05-21 | Paint stripping composition, production method thereof and stripping method using the composition |
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| KR1020150070772A KR101579786B1 (en) | 2015-05-21 | 2015-05-21 | Paint stripping composition, production method thereof and stripping method using the composition |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20000052701A (en) * | 1996-10-22 | 2000-08-25 | 존 그라함 로렌스 | Compositions and method for removing paint from a substrate |
| JP2002275394A (en) * | 2001-03-21 | 2002-09-25 | Neos Co Ltd | Aqueous coating-removing agent |
| JP2002309127A (en) * | 2001-04-11 | 2002-10-23 | Sansai Kako Kk | Release agent for photo-setting type resin coating and releasing method of the resin coating |
| KR20050065056A (en) | 2003-12-24 | 2005-06-29 | 두산인프라코어 주식회사 | Masking ball supply device for painting line of vehicle wheel |
| KR101152536B1 (en) | 2010-02-26 | 2012-06-01 | 경북대학교 산학협력단 | Paint Stripper Composition and Manufacturing Method thereof |
| KR101207501B1 (en) * | 2012-05-23 | 2012-12-03 | (주)삼일폴리머 | Composition of paint stripper and paint stripper |
-
2015
- 2015-05-21 KR KR1020150070772A patent/KR101579786B1/en active IP Right Grant
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20000052701A (en) * | 1996-10-22 | 2000-08-25 | 존 그라함 로렌스 | Compositions and method for removing paint from a substrate |
| JP2002275394A (en) * | 2001-03-21 | 2002-09-25 | Neos Co Ltd | Aqueous coating-removing agent |
| JP2002309127A (en) * | 2001-04-11 | 2002-10-23 | Sansai Kako Kk | Release agent for photo-setting type resin coating and releasing method of the resin coating |
| KR20050065056A (en) | 2003-12-24 | 2005-06-29 | 두산인프라코어 주식회사 | Masking ball supply device for painting line of vehicle wheel |
| KR101152536B1 (en) | 2010-02-26 | 2012-06-01 | 경북대학교 산학협력단 | Paint Stripper Composition and Manufacturing Method thereof |
| KR101207501B1 (en) * | 2012-05-23 | 2012-12-03 | (주)삼일폴리머 | Composition of paint stripper and paint stripper |
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