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Water-based paint remover as well as preparation method and using method thereof

A paint remover and water-based technology, which is applied in the field of water-based paint remover and its preparation, can solve the problems of large environmental pollution and high cost of paint remover, and achieve cost-friendly, pollution-free, strong paint-removing ability and low cost Effect

Inactive Publication Date: 2010-06-23
ANHUI JIANGNAN MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The commonly used paint removers include concentrated alkali type paint remover, strong acid paint remover, halogenated hydrocarbon type paint remover and non-halogenated hydrocarbon type organic paint remover, but the cost of these paint removers is higher, Environmental pollution is great, especially for electrophoretic paint films that have strong bonding and adhesion to the substrate after being baked, so it is difficult to completely remove this baked epoxy resin paint film with general paint removers

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0019] In the preparation method of the water-based paint remover of the present invention, wherein the sodium hydroxide and the alkali auxiliary agent are completely dissolved, and then the composite additive and the washing agent are added in sequence. After the composite additives and builders are added into the solution, the temperature of the solution is raised to 60-70° C., and the oxidizing agent is slowly added, and evenly stirred to completely dissolve each component.

[0020] When using the water-based paint remover of the present invention, the paint remover is directly put into the paint remover and soaked. Generally, it is preferred to heat the paint remover to 75-85° C. for soaking, which can reduce the paint removal time. After soaking, wash the paint-removing parts with water, then acid-wash the paint-removing parts to make the paint film swell and fall off, and finally wash with water. The paint-removing time is generally 8-100 minutes.

Embodiment 1

[0022] Sodium hydroxide 100g / L, alkali additive 120g / L, potassium permanganate 40g / L, composite additive 15g / L, sodium citrate 1.0g / L, wherein the alkali additive is a mixture of sodium carbonate and trisodium phosphate, The composite additive is a compound composed of sodium metasilicate: sodium benzenesulfonate at a ratio of 1:0.05.

[0023] Add sodium hydroxide and alkali additives to the water in turn. After they are completely dissolved, add compound additives and sodium citrate in turn, and then heat up to 70°C, then slowly add potassium permanganate. The whole process is under the condition of constant stirring After the solid solute is completely dissolved, it can be put into the paint-removing parts. The paint-removing parts are soaked in the paint remover at a temperature of 85°C, and then washed-acid-washed. The paint-removing time is 90-100 minutes. The rate can reach 100%.

Embodiment 2

[0025] Sodium hydroxide 80g / L, trisodium phosphate 100g / L, potassium permanganate 40g / L, composite additive 8g / L, potassium citrate 0.5g / L, wherein said composite additive is sodium silicate: triethanolamine is A compound composed of a ratio of 1:0.1.

[0026] Add sodium hydroxide and trisodium phosphate to the water in turn. After completely dissolving, add compound additives and potassium citrate in turn, and then heat up to 65°C, then slowly add oxidant. The whole process is carried out under the condition of constant stirring. After the solid solute is completely dissolved, it can be put into the paint-removing parts. The paint-removing parts are soaked in the paint remover at a temperature of 85°C, and then washed-acid-washed. The paint-removing time is 70-90 minutes, and the paint-removing rate It can reach 100%. The type of paint film is an electrophoretic epoxy resin paint film with a thickness of 15-25 μm, and an epoxy paint with a thickness of 20-45 μm is sprayed.

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PUM

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Abstract

The invention relates to a water-based paint remover as well as a preparation method and a using method thereof, belonging to the technical field of paint removers. The paint remover comprises water and the following components in percentage by weight: 4 percent-10 percent of sodium hydroxide, 8 percent-12 percent of alkali auxiliary agents, 2.5 percent-4 percent of oxidants, 0.5 percent-1.5 percent of complex additives, 0.01 percent-0.1 percent of builders, wherein the alkali auxiliary agents are sodium carbonates and / or trisodium phosphates; the oxidants are potassium permanganates or chromic anhydrides; the complex additives are silicates or compounds of the metasilicates and corrosion inhibitors; and the builders are citrates. The water-based paint remover has the advantages of high paint removing capacity, low cost, environmental protection without pollution and simple and convenient preparation method and using method without a large quantity of equipment investment.

Description

technical field [0001] The invention relates to the technical field of paint remover, in particular to a water-based paint remover and its preparation method and use method. Background technique [0002] After long-term exposure, the coating film will appear aging, peeling, cracking and falling off, which will cause the paint film to lose its protective effect, or the workpiece needs to be repaired due to size changes, so the original paint film needs to be completely removed. Paint removers are often used to remove the paint film. Remove old paint and reapply new paint for protection. The commonly used paint removers include concentrated alkali type paint remover, strong acid paint remover, halogenated hydrocarbon type paint remover and non-halogenated hydrocarbon type organic paint remover, but the cost of these paint removers is higher, Environmental pollution is great, especially for electrophoretic paint films that have strong bonding and adhesion to the substrate afte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D9/00
Inventor 王成林汪建国程宗保谢毅文黄开喜
Owner ANHUI JIANGNAN MACHINERY
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