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Low-temperature-curing polyester resin for powder paints, powder paint using resin and preparation method thereof

A technology of powder coating and polyester resin, applied in the direction of powder coating, polyester coating, coating, etc., can solve the problems of application limitation, increase energy consumption, affect production efficiency, etc., reduce consumption and waste, and expand application fields , the effect of meeting the requirements of industrial scale production

Active Publication Date: 2015-04-08
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

Excessively high curing temperature not only limits its application in the fields of engineering plastics, wood and metal alloy materials, but also increases energy consumption and affects production efficiency

Method used

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  • Low-temperature-curing polyester resin for powder paints, powder paint using resin and preparation method thereof
  • Low-temperature-curing polyester resin for powder paints, powder paint using resin and preparation method thereof
  • Low-temperature-curing polyester resin for powder paints, powder paint using resin and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A low-temperature curing polyester resin for powder coatings, the composition and molar ratio of its raw materials are: 6.5 mol of neopentyl glycol, 2 mol of 1,3-butanediol, 0.5 mol of trimethylolpropane, 1,2,5 - Pentatriol 1mol, isophthalic acid 6.4mol, terephthalic acid 2.2mol, maleic anhydride 1.1mol, adipic acid 0.55mol, pyromellitic dianhydride 0.77mol, monobutyltin oxide 0.015mol, anti Oxidant 1010 0.01mol.

[0026] The preparation method of low-temperature curing type polyester resin for powder coating comprises the following steps:

[0027] A, the neopentyl glycol of formula quantity, 1,3 butanediol, trimethylolpropane, 1,2,5-pentanetriol are added in the there-necked flask that stirring and reflux condenser tube are housed, mix and stir and Heating and melting below 130°C;

[0028] B. Adding isophthalic acid, terephthalic acid, maleic anhydride and adipic acid in the above-mentioned mixed alcohol, and adding 0.1-0.2% monobutyltin oxide of the total amount of ...

Embodiment 2-4 and comparative example 1-2

[0032] 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.

[0033] Table 1 Composition and properties of polyester resin

[0034]

[0035]

[0036] As can be seen from Table 1, the glass transition temperatures of the polyester resins of Examples 2-4 are all lower than Comparative Examples 1-2 whose raw material content is not within the scope of the present invention; in addition, the softening point is also lower than that of Comparative Example 1 and 2.

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Abstract

The invention relates to a low-temperature-curing polyester resin for powder paints. According to the polyester resin, the varieties and quantity of high-branching-degree tribasic alcohols in polyalcohols are increased; and in the aspect of polybasic acid raw material selection, the quantity of the high-activity polybasic acid m-phthalic acid is increased, maleic anhydride and adipic acid are compounded, and high-activity pyromellitic dianhydride is used. The powder paint prepared from the polyester resin can be cured at the low temperature of 140-160 DEG C, and has the advantages of favorable curing film-forming property and favorable leveling property.

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 low-temperature curing polyester resin for powder coatings and a powder coating 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, conventional powder coatings require relatively high temperatures during cur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/52C08G63/85C09D167/06C09D5/03
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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