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Anticorrosion coating for sheet metal of air conditioner outdoor unit and preparation method thereof

A technology for air-conditioning outdoor units and anti-corrosion coatings, which is applied in the direction of anti-corrosion coatings, polyester coatings, coatings, etc., which can solve the problems of difficulty in popularization and application, poor overall performance of the coating film, and failure, and achieve improved UV aging resistance and hydrophobicity, enhanced salt spray corrosion resistance, and beneficial to popularization and application

Active Publication Date: 2021-01-26
HISENSE HOME APPLIANCES GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the relatively harsh marine atmospheric environment, ordinary polyester powder coatings cannot resist the damage of salt spray and ultraviolet rays in this environment, and the protective layer is easily damaged and fails.
At present, fluorocarbon powder coatings have been developed, whose UV aging resistance time is 1000 hours and salt spray corrosion resistance time is 1000 hours, which can meet the requirements of air conditioners in the marine atmospheric environment, but the preparation cost of the coating is high, and the promotion Difficult to apply
In addition, compared with ordinary polyester resins, silicone resins have better UV aging resistance and salt spray corrosion resistance, but using silicone resins alone to make anti-corrosion coatings is expensive and has poor adhesion to substrates. However, if silicone resin and polyester resin are used in combination, due to the poor compatibility of the two, silicone overflow will occur, which will eventually lead to poor overall performance of the coating film.

Method used

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  • Anticorrosion coating for sheet metal of air conditioner outdoor unit and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031]The anticorrosive coating for the sheet metal of the outdoor air-conditioning cabinet includes the following components in parts by weight: 50 parts of carboxyl-terminated polyester resin, 50 parts of silicone modified polyester resin, and 25 parts of triglycidyl isocyanurate , 10 parts of leveling agent, 1 part of benzoin, 1.0 part of silane coupling agent KH550, 25 parts of titanium dioxide, 5 parts of activated calcium carbonate; wherein the softening point of the carboxy-terminated polyester resin is 85-100°C; The hydroxyl content of the silicone modified polyester resin is 3% to 5%, and the softening point is 85 to 100°C; the leveling agent is a mixture of polyester powder and butyl acrylate polymer emulsion. The mass percentage of butyl acrylate polymerization emulsion is 10%.

[0032]The preparation method is as follows: adding titanium dioxide to the coupling agent, stirring and mixing on a high-speed mixer for 30 minutes; after drying the obtained mixture, triple shrinka...

Embodiment 2

[0034]The anticorrosive coating for the sheet metal of the outdoor air-conditioning cabinet includes the following components in parts by weight: 75 parts of carboxy-terminated polyester resin, 25 parts of silicone modified polyester resin, 15 parts of triglycidyl isocyanurate , 7.5 parts of leveling agent, 0.75 parts of benzoin, 0.75 parts of silane coupling agent KH560, 15 parts of titanium dioxide, 15 parts of activated calcium carbonate; wherein the softening point of the carboxy-terminated polyester resin is 85-100°C; The hydroxyl content of the silicone modified polyester resin is 3% to 5%, and the softening point is 85 to 100°C; the leveling agent is a mixture of polyester powder and butyl acrylate polymer emulsion. The mass percentage of butyl acrylate polymer emulsion is 10%.

[0035]The preparation method is as follows: adding titanium dioxide to the coupling agent, stirring and mixing on a high-speed mixer for 30 minutes; after drying the obtained mixture, triple shrinkage w...

Embodiment 3

[0037]The anticorrosive coating for the sheet metal of the outdoor air-conditioning cabinet includes the following components in parts by weight: 90 parts of carboxy-terminated polyester resin, 10 parts of silicone modified polyester resin, and 10 parts of triglycidyl isocyanurate , 5 parts of leveling agent, 0.5 parts of benzoin, 0.5 parts of silane coupling agent KH570, 5 parts of titanium dioxide, 25 parts of activated calcium carbonate; wherein the softening point of the carboxy-terminated polyester resin is 85-100°C; The hydroxyl content of the silicone modified polyester resin is 3% to 5%, and the softening point is 85 to 100°C; the leveling agent is a mixture of polyester powder and butyl acrylate polymer emulsion. The mass percentage of butyl acrylate polymer emulsion is 10%.

[0038]The preparation method is as follows: adding titanium dioxide to the coupling agent, stirring and mixing on a high-speed mixer for 30 minutes; after drying the obtained mixture, triple shrinkage wi...

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Abstract

The present invention proposes an anti-corrosion coating for the sheet metal of an outdoor unit of an air conditioner and a preparation method thereof. The anti-corrosion coating not only has excellent ultraviolet aging resistance and salt spray corrosion resistance, but also has low preparation cost and simple preparation method. It is beneficial to promote the application. The anticorrosion coating comprises the following components in parts by weight: 50-90 parts of carboxyl-terminated polyester resin, 10-50 parts of silicone-modified polyester resin, 10-25 parts of triglycidyl isocyanurate, leveling 5-10 parts of benzoin, 0.5-1 part of benzoin, 0.5-1.0 parts of coupling agent, 5-25 parts of titanium dioxide, and 5-25 parts of activated calcium carbonate.

Description

Technical field[0001]The invention belongs to the technical field of coatings, and particularly relates to an anticorrosive coating used for the sheet metal of an outdoor cabinet body of an air conditioner and a preparation method thereof.Background technique[0002]Sheet metal materials are widely used in the cabinets of outdoor units of air conditioners, which are extremely prone to rust and corrosion when exposed to the external environment for a long time. In order to improve the service life of the sheet metal material of the outdoor cabinet of the air conditioner, the powder coating is usually sprayed on the surface of the sheet metal material by electrostatic spraying, and then heated at high temperature to make the coating react to form a dense protective layer, which can remove the corrosive medium Separate from sheet metal materials to prevent corrosion of sheet metal materials.[0003]At present, most of the powder coatings used for the sheet metal of the outdoor air-conditio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D167/00C09D5/08C09D7/61C09D7/62C09D7/63
CPCC08K2003/2241C08K2003/265C08L2201/08C08L2205/025C08L2205/035C09D5/08C09D167/00C09D7/61C09D7/62C09D7/63C08L67/00C08L33/08C08K13/06C08K9/06C08K3/22C08K5/07C08K3/26C08K5/34926
Inventor 杨文宇刘忠民王伟戈
Owner HISENSE HOME APPLIANCES GRP CO LTD
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