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Polyester resin for ultra-weather-proof powder coating, powder coating with resin and preparing method for powder coating

A powder coating, polyester resin technology, applied in powder coatings, polyester coatings, coatings, etc., can solve the problems of chalking, easy breakage of chemical bonds, discoloration, etc., and achieve good film formation, strong hydrophobicity, and strong water resistance. Effect

Active Publication Date: 2015-04-22
黄山市向荣新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the unsaturated benzene ring and other groups of conventional polyesters for powder coatings, the chemical bonds in the polyester molecules are easily broken under the photooxidative degradation of ultraviolet rays and oxygen, resulting in powdering, embrittlement and discoloration. , making its outdoor weather resistance less than ideal

Method used

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  • Polyester resin for ultra-weather-proof powder coating, powder coating with resin and preparing method for powder coating
  • Polyester resin for ultra-weather-proof powder coating, powder coating with resin and preparing method for powder coating

Examples

Experimental program
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Effect test

Embodiment 1

[0019] A polyester resin for super weather-resistant powder coatings, its raw material composition and molar ratio are: 5.01mol of neopentyl glycol, 1.93mol of 1,3-cyclohexanediol, 1H, 1H, 10H, 10H-perfluoro- 0.76 mol of 1,10-decanediol; 6.0 mol of terephthalic acid, 1.6 mol of tetrafluoroisophthalic acid, 0.4 mol of hexafluoroglutaric acid; 0.013 mol of monobutyltin oxide.

[0020] The preparation method of polyester resin for super weather resistance powder coating comprises the following steps:

[0021] A. Add the neopentyl glycol, 1,6-cyclohexanediol, 1H, 1H, 10H, 10H-perfluoro-1, 10-decanediol in the formula amount into a three-necked flask equipped with a stirring and reflux condenser , mixed and stirred and heated and melted at 130°C;

[0022] B. Add the amount of terephthalic acid, hexafluoroglutaric acid and monobutyltin oxide catalyst, and gradually heat up in nitrogen atmosphere until no distillate is evaporated; the reaction temperature is not higher than 245 ° C,...

Embodiment 2-4 and comparative example 1-2

[0026] According to the formulation amounts listed in Table 1 below, the polyester resins of Examples 2-4 and Comparative Examples 1-2 were obtained according to the same preparation method as Example 1.

[0027] Table 1 Composition and properties of polyester resin

[0028]

[0029]

[0030] As can be seen from Table 1, the softening point and glass transition temperature of the polyester resin of Example 2-4 are all lower than Comparative Example 1-2 whose raw material content is not within the scope of the present invention; Example 1 and 2.

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Abstract

The invention relates to polyester resin for an ultra-weather-proof powder coating. Fluoro organic alcohol and fluoro organic acid serve as raw materials, the hydrophobicity of the fluoro raw materials is high, the film-forming property of the prepared product is good, extremely high waterproof, light resistant and thermal degradation capabilities are achieved, and the requirements for the industrial ordinary weatherproof performance and ultra-weather-proof performance in special fields can be met.

Description

technical field [0001] The invention belongs to the field of powder coating preparation; in particular, it relates to raw materials for powder coatings and a preparation method thereof and powder coatings using the raw materials, in particular to a polyester resin for super weather-resistant powder coatings, powder coatings using the resin and its preparation method. Background technique [0002] Since its appearance in the 1970s, powder coatings do not contain organic solvents and are 100% solid components. Compared with conventional coatings, powder coatings have the advantages of no pollution, saving energy and resources, high mechanical strength of coating films, and full recovery of excess coatings. Advantages, it is more and more widely used in the coating of household appliances, automobile industry, office appliances, metal materials, outdoor buildings and other shells. [0003] However, in the natural environment, the coating is affected by various natural factors,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/682C08G63/85C09D167/02C09D5/03
Inventor 郑荣辉鲍观良毕海鹏王永垒
Owner 黄山市向荣新材料有限公司
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