Low-temperature curing polyester resin for HAA system as well as preparation method and application thereof

A technology of polyester resin and low temperature, which is applied in the field of preparation of HAA system powder coating and low temperature curing polyester resin, which can solve the problem of high overall energy consumption and achieve the effect of reducing energy consumption and excellent comprehensive performance

Active Publication Date: 2018-08-17
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

[0004] However, the powder coating prepared by ordinary HAA-curable polyester resin needs to be fully cured at 180°C/15min, resulting in high overall energy consu

Method used

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  • Low-temperature curing polyester resin for HAA system as well as preparation method and application thereof
  • Low-temperature curing polyester resin for HAA system as well as preparation method and application thereof
  • Low-temperature curing polyester resin for HAA system as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The low-temperature curing polyester resin described in this embodiment, based on the total amount of the polyester resin, its preparation raw materials include the following raw material components in molar percentages:

[0027]

[0028] The preparation method of low-temperature curing polyester resin described in the present embodiment may further comprise the steps:

[0029] (1) Add the dimethyl isophthalate and glutaric anhydride of the selected amount into the mixer, and control the temperature to be heated and melted below 150°C;

[0030] (2) Add a selected amount of the 2-ethyl-1,3-hexanediol, butynediol, cyclohexane-1,2-dicarboxylic acid diglycidyl ester and estradiol to the above mixed material Alcohol, and add a selected amount of catalyst, gradually increase the temperature to 190 ° C under the protection of nitrogen, and add a selected amount of terephthalic acid to mix, then slowly increase the temperature until no obvious distillate is distilled out, an...

Embodiment 2

[0035] The low-temperature curing polyester resin described in this embodiment, based on the total amount of the polyester resin, its preparation raw materials include the following raw material components in molar percentages:

[0036]

[0037] The preparation method of the low-temperature curing polyester resin described in this embodiment is the same as that in Embodiment 1.

[0038] After testing, the low-temperature curing polyester resin prepared in this example has an acid value of 32 mgKOH / g and a softening point of 109°C.

Embodiment 3

[0040] The low-temperature curing polyester resin described in this embodiment, based on the total amount of the polyester resin, its preparation raw materials include the following raw material components in molar percentages:

[0041]

[0042] The preparation method of the low-temperature curing polyester resin described in this embodiment is the same as that in Embodiment 1.

[0043] After testing, the acid value of the low-temperature curing polyester resin prepared in this example is 30 mgKOH / g, and the softening point is 95° C.

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Abstract

The invention belongs to the technical field of powder coating, and particularly relates to a low-temperature curing polyester resin for an HAA system, and further discloses a preparation method thereof, and application thereof in preparing an HAA system powder coating. The low-temperature curing polyester resin provided by the invention is formed by performing copolymerization on highly-active monomer raw materials such as dimethyl isophthalate, phenylenediacetic acid, glutaric anhydride, 2-ethyl-1,3-hexanediol, butynediol, cyclohexane-1,2-dicarboxylic diglycidyl ester, estradiol and citric acid, the acid value of the finally obtained polyester resin is 30 to 35mgKOH/g, the softening point is 95 to 110 DEG C, and the activity of the polyester resin is high; furthermore, as the softening point is lowered, the fully curing of the polyester resin under the condition of 140 DEG C/20min can be realized, energy consumption in the powder coating technology is greatly reduced, and the performance of various aspects of the low-temperature curing polyester resin can better reach the using requirement of common HAA-cured polyester resin, and excellent combination property is realized.

Description

technical field [0001] The invention belongs to the technical field of powder coatings, and in particular relates to a low-temperature curing polyester resin for HAA systems, and further discloses its preparation method and its application for preparing HAA system powder coatings. Background technique [0002] Powder coating is a 100% solid powder that does not contain organic solvents. It is different from oil-based paints and water-based paints. It does not use solvent or water as a dispersion medium when coating, but uses air as a dispersion medium to evenly coat the workpiece. The surface is a new type of environmentally friendly paint that forms a special-purpose coating film after heating. Powder coating has the advantages of no VOC, environmental protection, energy saving, high construction efficiency and wide application range. With its advantages of economy, environmental protection, high efficiency and excellent performance, it is gradually replacing organic solven...

Claims

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Application Information

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IPC IPC(8): C08G63/553C08G63/85C09D167/06C09D5/03
CPCC08G63/553C08G63/85C09D5/03C09D167/06
Inventor 郑荣辉毕海鹏江蓉张齐王永垒冯小浩
Owner 黄山市向荣新材料有限公司
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