CN112175442A - Powder coating paint remover and preparation method thereof - Google Patents
Powder coating paint remover and preparation method thereof Download PDFInfo
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- CN112175442A CN112175442A CN202011166016.1A CN202011166016A CN112175442A CN 112175442 A CN112175442 A CN 112175442A CN 202011166016 A CN202011166016 A CN 202011166016A CN 112175442 A CN112175442 A CN 112175442A
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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
- C09D9/04—Chemical paint or ink removers with surface-active agents
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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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- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Paints Or Removers (AREA)
Abstract
The invention relates to the technical field of paint depainting, in particular to a powder paint depainting agent and a preparation method thereof, which solve the problem that most of the depainting agents in the prior art are water systems and are easy to damage a base material after depainting, and comprise the following components: a main solvent, a cosolvent, a promoter, a penetration aid, a surfactant, a thickening agent and tea polyphenol; wherein, the main solvent is dichloromethane, the cosolvent is methanol, the accelerant is inorganic base, the surfactant is OP-10, the penetration auxiliary agent is AEO-3 emulsifier, and the thickening agent is magnesium stearate. Aiming at paint removal of the powder coating, the powder coating is dissolved into the paint remover by a dissolving method, so that heterogeneous included angles and atomized powder can be fully dissolved, and the paint removal of a workpiece is more thorough; the alkaline formula of an anhydrous system is adopted, so that active metals such as aluminum, zinc and the like do not damage a base material after paint removal, and the formula has low cost, high paint removal efficiency, safe use and convenience.
Description
Technical Field
The invention relates to the technical field of paint remover, in particular to a powder paint remover and a preparation method thereof.
Background
The powder coating is used as a substitute of a solvent type coating, and is environment-friendly, convenient and fast to construct and popular in the coating market due to the fact that the powder coating does not contain an organic solvent. Like the traditional coating, the powder coating also has poor spraying phenomenon in the coating, and can be polished and recoated when the local part is slightly poor, but the powder coating needs to be removed and recoated when the local part is seriously poor.
Although the traditional methylene chloride type acidic paint remover can swell powder coating, gaps of some isomeric pieces cannot be completely swelled and peeled due to limited space, so that paint removal is incomplete, other workpieces which are sprayed on one side are not required to be sprayed on the back, but atomized powder is on the workpieces, and the traditional methylene chloride type acidic paint remover cannot swell the powder coating on the atomized part and cannot realize complete paint removal. The traditional acidic and alkaline paint removers have corrosion phenomena on active metals such as aluminum, zinc and other base materials, and the aim of removing paint without damaging the base materials cannot be well fulfilled.
Therefore, we propose a powder coating paint remover and a preparation method thereof to solve the above problems.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides a powder coating paint remover and a preparation method thereof.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides a powder coating paint remover which comprises the following components in parts by weight: 70-75 parts of main solvent, 20-25 parts of cosolvent, 0.5-3 parts of accelerant, 0.5-1 part of penetration aid, 0.3-0.6 part of surfactant, 5-8 parts of thickening agent and 7-13 parts of tea polyphenol.
Preferably, the powder coating paint remover comprises the following components in parts by weight: 72 parts of main solvent, 22 parts of cosolvent, 2 parts of accelerant, 0.8 part of penetration aid, 0.5 part of surfactant, 6 parts of thickener and 9 parts of tea polyphenol.
Preferably, the main solvent is dichloromethane, the cosolvent is methanol, the accelerant is inorganic base, the surfactant is OP-10, the penetration aid is an AEO-3 emulsifier, and the thickener is magnesium stearate.
Preferably, the accelerator is sodium hydroxide, and the concentration of the sodium hydroxide is 2-15%.
Preferably, the preparation method of the powder coating paint remover comprises the following steps:
s1: weighing the components in parts by weight;
s2: slowly adding methanol into sodium hydroxide while stirring, and continuously stirring at 50-60 ℃ until the methanol is completely dissolved;
s3: standing to reduce the temperature of the solution to room temperature, then adding dichloromethane, stirring, continuously stirring for 20-30 min, then heating to 40-50 ℃, adding magnesium stearate and tea polyphenol, and continuously stirring until the magnesium stearate and the tea polyphenol are completely dissolved;
s4: and adding AEO-3 and OP-10 into the solution obtained in the step S3, and uniformly and completely stirring to obtain the paint remover.
Preferably, in S3, the solution is allowed to stand to cool to room temperature, then dichloromethane is added and stirred, stirring is continued for 25min, then the temperature is increased to 45 ℃, magnesium stearate and tea polyphenol are added and stirring is continued until complete dissolution.
Compared with the prior art, the invention is directed at the paint removal of the powder coating, and the powder coating is dissolved into the paint remover by a dissolving method, so that isomeric included angles and atomized powder can be fully dissolved, and the paint removal of workpieces is more thorough; the alkaline formula of an anhydrous system is adopted, so that active metals such as aluminum, zinc and the like do not damage a base material after paint removal, and the formula has low cost, high paint removal efficiency, safe use and convenience.
Detailed Description
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. In case of conflict, the present specification, including definitions, will control. When "mass, concentration, temperature, time, or other value or parameter is expressed as a range, preferred range, or as a range defined by a list of upper preferable values and lower preferable values, this is to be understood as specifically disclosing all ranges formed from any pair of any upper range limit or preferred value and any lower range limit or preferred value, regardless of whether ranges are separately disclosed. For example, a range of 1 to 50 should be understood to include any number, combination of numbers, or subrange selected from 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, or 50, and all fractional values between the above integers, e.g., 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, and 1.9. With respect to sub-ranges, specifically consider "nested sub-ranges" that extend from any endpoint within the range. For example, nested sub-ranges of exemplary ranges 1-50 may include 1-10, 1-20, 1-30, and 1-40 in one direction, or 50-40, 50-30, 50-20, and 50-10 in another direction. "
The present invention is further illustrated below with reference to specific examples in which various processes and methods not described in detail are conventional methods well known in the art. Materials, reagents, devices, instruments, apparatuses and the like used in the following examples are commercially available unless otherwise specified.
Example one
The invention provides a powder coating paint remover which comprises the following components in parts by weight: 70 parts of main solvent, 20 parts of cosolvent, 0.5 part of accelerant, 0.5 part of penetration aid, 0.3 part of surfactant, 5 parts of thickening agent and 7 parts of tea polyphenol.
The main solvent is dichloromethane, the cosolvent is methanol, the accelerant is sodium hydroxide, the concentration of the sodium hydroxide is 2%, the surfactant is OP-10, the penetration aid is an AEO-3 emulsifier, and the thickening agent is magnesium stearate.
Further, the embodiment also comprises a preparation method of the powder coating paint remover, which comprises the following steps:
s1: weighing the components in parts by weight;
s2: slowly adding methanol into sodium hydroxide while stirring, and continuously stirring at 50 ℃ until the methanol is completely dissolved;
s3: standing to reduce the temperature of the solution to room temperature, adding dichloromethane, stirring, continuously stirring for 20min, heating to 40 ℃, adding magnesium stearate and tea polyphenol, and continuously stirring until the magnesium stearate and the tea polyphenol are completely dissolved;
s4: and adding AEO-3 and OP-10 into the solution obtained in the step S3, and uniformly and completely stirring to obtain the paint remover.
Example two
The invention provides a powder coating paint remover which comprises the following components in parts by weight: 72 parts of main solvent, 22 parts of cosolvent, 1 part of accelerant, 0.7 part of penetration aid, 0.4 part of surfactant, 6 parts of thickener and 9 parts of tea polyphenol.
The main solvent is dichloromethane, the cosolvent is methanol, the accelerant is sodium hydroxide, the concentration of the sodium hydroxide is 7%, the surfactant is OP-10, the penetration aid is an AEO-3 emulsifier, and the thickening agent is magnesium stearate.
Further, the embodiment also comprises a preparation method of the powder coating paint remover, which comprises the following steps:
s1: weighing the components in parts by weight;
s2: slowly adding methanol into sodium hydroxide while stirring, and continuously stirring at 55 ℃ until the methanol is completely dissolved;
s3: standing to reduce the temperature of the solution to room temperature, adding dichloromethane, stirring, continuously stirring for 24min, heating to 44 ℃, adding magnesium stearate and tea polyphenol, and continuously stirring until the magnesium stearate and the tea polyphenol are completely dissolved;
s4: and adding AEO-3 and OP-10 into the solution obtained in the step S3, and uniformly and completely stirring to obtain the paint remover.
EXAMPLE III
The invention provides a powder coating paint remover which comprises the following components in parts by weight: 74 parts of main solvent, 24 parts of cosolvent, 2 parts of accelerant, 0.8 part of penetration aid, 0.5 part of surfactant, 7 parts of thickener and 11 parts of tea polyphenol.
The main solvent is dichloromethane, the cosolvent is methanol, the accelerant is sodium hydroxide, the concentration of the sodium hydroxide is 13%, the surfactant is OP-10, the penetration aid is an AEO-3 emulsifier, and the thickening agent is magnesium stearate.
Further, the embodiment also comprises a preparation method of the powder coating paint remover, which comprises the following steps:
s1: weighing the components in parts by weight;
s2: slowly adding methanol into sodium hydroxide while stirring, and continuously stirring at 58 ℃ until the methanol is completely dissolved;
s3: standing to reduce the temperature of the solution to room temperature, adding dichloromethane, stirring, continuously stirring for 28min, heating to 48 ℃, adding magnesium stearate and tea polyphenol, and continuously stirring until the magnesium stearate and the tea polyphenol are completely dissolved;
s4: and adding AEO-3 and OP-10 into the solution obtained in the step S3, and uniformly and completely stirring to obtain the paint remover.
Example four
The invention provides a powder coating paint remover which comprises the following components in parts by weight: 75 parts of main solvent, 25 parts of cosolvent, 3 parts of accelerant, 1 part of penetration aid, 0.6 part of surfactant, 8 parts of thickener and 13 parts of tea polyphenol.
The main solvent is dichloromethane, the cosolvent is methanol, the accelerant is sodium hydroxide, the concentration of the sodium hydroxide is 15%, the surfactant is OP-10, the penetration aid is an AEO-3 emulsifier, and the thickening agent is magnesium stearate.
Further, the embodiment also comprises a preparation method of the powder coating paint remover, which comprises the following steps:
s1: weighing the components in parts by weight;
s2: slowly adding methanol into sodium hydroxide while stirring, and continuously stirring at 60 ℃ until the methanol is completely dissolved;
s3: standing to reduce the temperature of the solution to room temperature, adding dichloromethane, stirring, continuously stirring for 30min, heating to 50 ℃, adding magnesium stearate and tea polyphenol, and continuously stirring until the magnesium stearate and the tea polyphenol are completely dissolved;
s4: and adding AEO-3 and OP-10 into the solution obtained in the step S3, and uniformly and completely stirring to obtain the paint remover.
Comparative example 1
The powder coating paint remover comprises the following components in parts by weight: 75 parts of main solvent, 25 parts of cosolvent, 3 parts of accelerant, 1 part of penetration aid, 0.6 part of surfactant and 13 parts of tea polyphenol.
The main solvent is dichloromethane, the cosolvent is methanol, the accelerant is sodium hydroxide, the concentration of the sodium hydroxide is 15%, the surfactant is OP-10, the penetration aid is an AEO-3 emulsifier, and the thickening agent is magnesium stearate.
The preparation method of the powder coating paint remover comprises the following steps:
s1: weighing the components in parts by weight;
s2: slowly adding methanol into sodium hydroxide while stirring, and continuously stirring at 60 ℃ until the methanol is completely dissolved;
s3: standing to reduce the temperature of the solution to room temperature, adding dichloromethane, stirring, continuously stirring for 30min, heating to 50 deg.C, adding tea polyphenols, and continuously stirring until completely dissolved;
s4: and adding AEO-3 and OP-10 into the solution obtained in the step S3, and uniformly and completely stirring to obtain the paint remover.
Comparative example No. two
The powder coating paint remover comprises the following components in parts by weight: 75 parts of main solvent, 25 parts of cosolvent, 3 parts of accelerant, 1 part of penetration aid, 0.6 part of surfactant and 8 parts of thickener.
The main solvent is dichloromethane, the cosolvent is methanol, the accelerant is sodium hydroxide, the concentration of the sodium hydroxide is 15%, the surfactant is OP-10, the penetration aid is an AEO-3 emulsifier, and the thickening agent is magnesium stearate.
The preparation method of the powder coating paint remover comprises the following steps:
s1: weighing the components in parts by weight;
s2: slowly adding methanol into sodium hydroxide while stirring, and continuously stirring at 60 ℃ until the methanol is completely dissolved;
s3: standing to reduce the temperature of the solution to room temperature, then adding dichloromethane, stirring, continuously stirring for 30min, then heating to 50 ℃, adding magnesium stearate, and continuously stirring until the magnesium stearate is completely dissolved;
s4: and adding AEO-3 and OP-10 into the solution obtained in the step S3, and uniformly and completely stirring to obtain the paint remover.
COMPARATIVE EXAMPLE III (with Water System)
The method comprises the following steps: sequentially adding benzyl alcohol and ethyl acetate into a preparation container;
step two: adding water, adding ethanol, and stirring;
step three: adding a surfactant;
step four: adding formic acid;
step five: adding liquid paraffin and a corrosion inhibitor;
step six: adding the thickening agent and stirring for ten minutes at normal temperature.
The paint strippers prepared in the first to fourth examples and the first to third comparative examples were mixed with water at a concentration of 5% by mass to prepare working liquids, and 1L of the working liquids were used for stripping work to calculate stripping areas, and the results are shown in Table 1 below:
TABLE 1
| Area of paint removal (m)2) | Damage condition of substrate | |
| Example one | 8.1 | Is free of |
| Example two | 8.3 | Is free of |
| EXAMPLE III | 8.3 | Is free of |
| Example four | 8.4 | Is free of |
| Comparative example 1 | 7.3 | Is free of |
| Comparative example No. two | 7.1 | Is free of |
| Comparative example No. three | 6.2 | Is provided with |
According to the above table 1, the first to fourth embodiments of the present invention have good paint removal effects, no substrate damage occurs after paint removal, high safety, and low cost.
In the comparison between the fourth example and the first comparative example, other conditions are the same, and magnesium stearate serving as a thickening agent is not used in the first comparative example, so that the final paint removing area is reduced, and the using effect of the paint remover is reduced;
in comparison between example four and comparative example two, in comparative example two, the tea polyphenol added in the configuration of S3 is removed, so that the paint removing area of the finally prepared paint remover after use is reduced, and the use effect of the paint remover is also reduced;
in the third comparative example, the existing aqueous system is adopted to prepare the paint remover, so that the paint removing effect is poor, and the condition of base damage occurs after paint removing.
In conclusion, aiming at the paint removal of the powder coating, the powder coating is dissolved into the paint remover by a dissolving method, so that heterogeneous included angle and atomized powder can be fully dissolved, and the paint removal of workpieces is more thorough; the alkaline formula of an anhydrous system is adopted, so that active metals such as aluminum, zinc and the like do not damage a base material after paint removal, and the formula has low cost, high paint removal efficiency, safe use and convenience.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (6)
1. The powder coating paint remover is characterized by comprising the following components in parts by weight: 70-75 parts of main solvent, 20-25 parts of cosolvent, 0.5-3 parts of accelerant, 0.5-1 part of penetration aid, 0.3-0.6 part of surfactant, 5-8 parts of thickening agent and 7-13 parts of tea polyphenol.
2. The powder coating paint remover according to claim 1, characterized by comprising the following components in parts by weight: 72 parts of main solvent, 22 parts of cosolvent, 2 parts of accelerant, 0.8 part of penetration aid, 0.5 part of surfactant, 6 parts of thickener and 9 parts of tea polyphenol.
3. The powder coating paint remover according to claim 1 or 2, wherein the main solvent is dichloromethane, the cosolvent is methanol, the accelerator is inorganic base, the surfactant is OP-10, the penetration aid is AEO-3 emulsifier, and the thickener is magnesium stearate.
4. The paint remover for powder coating according to claim 3, wherein the accelerator is sodium hydroxide, and the concentration of the sodium hydroxide is 2-15%.
5. A method for preparing the paint stripper for the powder coating according to any one of claims 1 to 4, which is characterized by comprising the following steps:
s1: weighing the components in parts by weight;
s2: slowly adding methanol into sodium hydroxide while stirring, and continuously stirring at 50-60 ℃ until the methanol is completely dissolved;
s3: standing to reduce the temperature of the solution to room temperature, then adding dichloromethane, stirring, continuously stirring for 20-30 min, then heating to 40-50 ℃, adding magnesium stearate and tea polyphenol, and continuously stirring until the magnesium stearate and the tea polyphenol are completely dissolved;
s4: and adding AEO-3 and OP-10 into the solution obtained in the step S3, and uniformly and completely stirring to obtain the paint remover.
6. The method for preparing the paint remover for powder coating according to claim 1, wherein in S3, the solution is allowed to stand to cool to room temperature, then dichloromethane is added and stirred, stirring is continued for 25min, then the temperature is raised to 45 ℃, magnesium stearate and tea polyphenol are added and stirring is continued until complete dissolution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202011166016.1A CN112175442A (en) | 2020-10-27 | 2020-10-27 | Powder coating paint remover and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011166016.1A CN112175442A (en) | 2020-10-27 | 2020-10-27 | Powder coating paint remover and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114045062A (en) * | 2021-12-10 | 2022-02-15 | Oppo广东移动通信有限公司 | Ceramic deinking agent, ceramic part deinking method and electronic equipment |
Citations (2)
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|---|---|---|---|---|
| CN106398379A (en) * | 2016-12-01 | 2017-02-15 | 丁文龙 | Water-based anticorrosive composite paint remover for ship having deodorizing function and preparation method thereof |
| CN108084772A (en) * | 2017-12-22 | 2018-05-29 | 澧县津溥包装制品有限责任公司 | A kind of printing ink washing agent and preparation method |
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2020
- 2020-10-27 CN CN202011166016.1A patent/CN112175442A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106398379A (en) * | 2016-12-01 | 2017-02-15 | 丁文龙 | Water-based anticorrosive composite paint remover for ship having deodorizing function and preparation method thereof |
| CN108084772A (en) * | 2017-12-22 | 2018-05-29 | 澧县津溥包装制品有限责任公司 | A kind of printing ink washing agent and preparation method |
Non-Patent Citations (1)
| Title |
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| 梁治齐: "《实用清洗技术手册》", 31 January 2000, 化学工业出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114045062A (en) * | 2021-12-10 | 2022-02-15 | Oppo广东移动通信有限公司 | Ceramic deinking agent, ceramic part deinking method and electronic equipment |
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