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A kind of low-temperature curable polyester resin and its preparation method and application

A polyester resin, curing technology, applied in polyester coatings, powder coatings, coatings, etc., can solve the problem of high energy consumption, achieve high activity, reduce energy consumption, and good stability

Active Publication Date: 2021-01-26
HUANGSHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the traditional HAA system powder coating needs to be fully cured at 200°C / 12min, resulting in high energy consumption in the entire coating process

Method used

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  • A kind of low-temperature curable polyester resin and its preparation method and application
  • A kind of low-temperature curable polyester resin and its preparation method and application
  • A kind of low-temperature curable polyester resin and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 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 molar amounts of raw material components:

[0025]

[0026] The preparation method of the low-temperature curing type polyester resin described in the present embodiment comprises the following steps:

[0027] (1) Mix the terephthalic acid and dimethyl 2,3-pyridinedicarboxylate in the formulation amount, and control the temperature to be lower than 130°C for heating and melting;

[0028] (2) Add the 2-ethyl-1,3-hexanediol, neopentyl glycol, and 1,6-hexanediol diglycidyl ether in the formula amount to the above-mentioned mixed material, and add the selected amount of the The above-mentioned catalyst, under the protection of nitrogen, gradually raised the temperature to 200°C for reaction; then added the 2-hydroxypropionic acid and 1,2,4-trihydroxybenzene in the formula amount, slowly raised the t...

Embodiment 2

[0033] 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 molar amounts of raw material components:

[0034]

[0035] The preparation method of the low-temperature curing type polyester resin described in the present embodiment comprises the following steps:

[0036] (1) Mix the terephthalic acid and dimethyl 2,3-pyridinedicarboxylate in the formulation amount, and control the temperature to be lower than 130°C for heating and melting;

[0037] (2) Add the described 2-ethyl-1,3-hexanediol, neopentyl glycol, 1,6-hexanediol diglycidyl ether of formula amount to above-mentioned mixture material, and add the selected amount of all The above catalyst, under the protection of nitrogen, gradually raised the temperature to 190°C for reaction; then added the formula amount of 2-hydroxypropionic acid and 1,2,4-trihydroxybenzene, slowly raised the temperature and...

Embodiment 3

[0042] 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 molar amounts of raw material components:

[0043]

[0044]

[0045] The preparation method of the low-temperature curing type polyester resin described in the present embodiment comprises the following steps:

[0046] (1) Mix the terephthalic acid and dimethyl 2,3-pyridinedicarboxylate in the formulation amount, and control the temperature to be lower than 130°C for heating and melting;

[0047] (2) Add the described 2-ethyl-1,3-hexanediol, androstenediol, neopentyl glycol, 1,6-hexanediol diglycidyl ether of formulation amount in the above-mentioned mixed material, and Add a selected amount of the catalyst, under the protection of nitrogen, gradually raise the temperature to 195°C for reaction; then add the formula amount of 2-hydroxypropionic acid and 1,2,4-trihydroxybenzene, slowly raise t...

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Abstract

The invention belongs to the technical field of powder coatings, specifically relates to a low-temperature curing polyester resin, and further discloses its preparation method and its application for preparing powder coatings. The low-temperature curable polyester resin of the present invention is polymerized by using high-activity monomer raw materials, and the activity of the finally obtained polyester resin is relatively high and the molecular chain is relatively soft through the mutual cooperation and synergistic effect of the various components. , the softening point is reduced, ensuring good low-temperature leveling, and can achieve full curing at 150 ° C, which greatly reduces energy consumption, and the polyester resin and its prepared powder coating have good stability and excellent curing and film formation. Moreover, the leveling property of the powder coating is good, and the performance in all aspects is good, meeting the coating film requirements of ordinary HAA polyester resin.

Description

technical field [0001] The invention belongs to the technical field of powder coatings, specifically relates to a low-temperature curing polyester resin, and further discloses its preparation method and its application for preparing 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 solvent-based coatings and has become ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G63/685C09D167/00C09D5/03
CPCC08G63/685C09D5/03C09D167/00
Inventor 王永垒李海云江蓉邢楠楠魏文静朱梦泽张雅文
Owner HUANGSHAN UNIV
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