Water-based paint for anticorrosion treatment of copper pipes of two devices of air conditioner and preparation method of water-based paint

Abstract

The invention provides a water-based paint for anticorrosion treatment of copper pipes of two devices of an air conditioner. The paint, including 100 parts wholly, comprises the following components in parts by weight: 15-30 parts of water-based epoxy modified acrylic resin, 0.2-0.5 part of organic amine, 8-15 parts of a low-temperature baking curing agent, 1-6 parts of an adhesion promoter, 0.05-0.5 part of a wetting agent, 0.05-0.5 part of a flatting agent and the balance of water, wherein the water-based epoxy modified acrylic resin is prepared from the following components in parts by weight: 50 to 70 parts of water-soluble acrylic resin, 5 to 15 parts of epoxy resin, 3 to 5 parts of acrylic acid, 2 to 5 parts of phosphorus-containing monomer, 0.2 to 0.5 part of peroxide initiator, 2 to 5 parts of ethylene glycol butyl ether and 1 to 3 parts of isoparaffin solvent. The anticorrosive treatment water-based paint for the copper pipes of the two devices of the air conditioner is good in wetting and leveling effect on the surfaces of the copper pipes, good in adhesion performance and good in anticorrosive effect. The invention also provides a preparation method of the water-based paint for the anticorrosion treatment of the copper pipes of the two devices of the air conditioner.

Description

technical field [0001] The invention relates to the technical field of water-based coatings, in particular to a water-based coating for anti-corrosion treatment of copper pipes of two air conditioners and a preparation method thereof. Background technique [0002] The pipes of the two air conditioners are made of copper, and the two ends of the two devices are U-shaped bends or elbows. If the outer surface of the copper tube assembled into the air conditioner is in direct contact with the air, after the acidic and alkaline gases in the environment adhere to the surface of the copper tube base material for a long time, ant nest corrosion will occur, resulting in refrigerant leakage, and the air conditioner will lose its effect. The salt content is high, especially in areas with high humidity and high temperature. [0003] In the prior art, copper tube anticorrosion treatment methods mainly include copper tube tinning and copper tube surface coated with an oxide film. For ex...

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Problems solved by technology

For example, the Chinese patent CN105401177A uses an electroplating process to carry out tin-plating pretreatment on copper pipes. This treatment scheme has the following defects: 1. The anti-corrosion effect is not good; 2. The treatment process is relatively complicated, which seriously affects the production efficiency of air-conditioning manufacturers; 3. The acid-base and Electroplating solution, etc. cause secondary environmental pollution; 4. Affect the heat conduction effect of copper tubes

Chinese patent CN107904586A first uses electrolytic degreasing, and then soaks in potassium sulfate solution to form an oxide film on the surface of the copper tube. This solution also has poor anti-corrosion effect and environmental pollution problems.

[0004] In addition, air-conditioning manufacturers also try to coat the surface of copper pipes to improve the anti-corrosion properties of the coating, but at present there are mainly the following problems after trying many products: 1. Residual oil stains on the surface of copper pipes, etc. The product has poor wetting and adhesion on the surface of the substrate, and the coating cannot be applied or the coating is easy to fall off; 2. The anti-corrosion effect of the coating is poor

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