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Corrosion-resistant weather-resistant high-storage-performance polyester resin for powder coating

A technology of polyester resin and powder coating, which is applied in the field of polyester resin for powder coating, powder coating and coating, which can solve the problems of poor corrosion resistance, complex formula, attention to corrosion resistance, etc., and achieve excellent corrosion resistance , strong key energy, and cost reduction effect

Active Publication Date: 2021-06-15
SHANDONG SHANGHE POWER TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the current powder coatings have the disadvantages of complex formula, poor corrosion resistance, or only focus on corrosion resistance, and the comprehensive performance is not comprehensive enough.

Method used

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  • Corrosion-resistant weather-resistant high-storage-performance polyester resin for powder coating
  • Corrosion-resistant weather-resistant high-storage-performance polyester resin for powder coating

Examples

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Comparison scheme
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preparation example Construction

[0032] The present invention provides the preparation method of above-mentioned polyester resin simultaneously, and the steps are as follows:

[0033] (1) Add the formulated amount of neopentyl glycol, ethylene glycol, fluorine-containing glycol, and optional isosorbide into a three-necked flask equipped with a stirring and reflux condenser, mix and stir and heat at 100-140°C melt;

[0034] (2) Continue to raise the temperature to 150-180°C, add the formulated amount of terephthalic acid, fluorine-containing dicarboxylic acid and catalyst, pass nitrogen gas and raise the temperature to 180-190°C to start the esterification reaction and produce esterified water to distill out, and then gradually Raise the temperature to 22-250°C, react for 5-10 hours until 95% of the esterification water is discharged, and the acid value reaches 12-15mgKOH / g;

[0035] (3) Then cool down to 200-210°C, add the formula amount of isophthalic acid, and then continue to gradually raise the temperatu...

Embodiment 1

[0041] A polyester resin for powder coatings with corrosion resistance, weather resistance and high storage performance. 54.0g, neopentyl glycol 60.9g, ethylene glycol 12.1g, 2,2,3,3-tetrafluoro-1,4-butanediol 21.1g, isosorbide 11.4g; the catalyst is tetrabutyl titanate 0.02mol.

[0042] The preparation method step of polyester resin is as follows:

[0043] (1) Add the prescribed amount of neopentyl glycol, ethylene glycol, 2,2,3,3-tetrafluoro-1,4-butanediol, and isosorbide into a three-necked flask equipped with a stirring and reflux condenser , mixed and stirred and heated and melted at 130°C;

[0044] (2) Continue to raise the temperature to 170°C, add the formulated amount of terephthalic acid, 2,6-difluoro-terephthalic acid and tetrabutyl titanate catalyst, and raise the temperature to 180°C with nitrogen gas to start the esterification reaction and generate ester Distill off the water, then gradually raise the temperature to 240°C, react for 5-10 hours until 95% of th...

Embodiment 2

[0047] A polyester resin for powder coatings with corrosion resistance, weather resistance and high storage performance. 54.0g, neopentyl glycol 60.9g, ethylene glycol 12.1g, 2,2,3,3-tetrafluoro-1,4-butanediol 21.1g, isosorbide 15.2g; the catalyst is tetrabutyl titanate 0.02mol.

[0048] The preparation method step of polyester resin is as follows:

[0049] (1) Add the prescribed amount of neopentyl glycol, ethylene glycol, 2,2,3,3-tetrafluoro-1,4-butanediol, and isosorbide into a three-necked flask equipped with a stirring and reflux condenser , mixed and stirred and heated and melted at 130°C;

[0050] (2) Continue to raise the temperature to 170°C, add the formulated amount of terephthalic acid, 2,6-difluoro-terephthalic acid and tetrabutyl titanate catalyst, and raise the temperature to 180°C with nitrogen gas to start the esterification reaction and generate ester Distill off the water, then gradually raise the temperature to 240°C, react for 5-10 hours until 95% of th...

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Abstract

The invention relates to the technical field of powder coatings, in particular to polyester resin for a powder coating with corrosion resistance, weather resistance and high storage performance, the powder coating and a coating. The polyester resin is prepared from, by weight, 90-125 parts of terephthalic acid, 22-30 parts of fluorine-containing dicarboxylic acid, 46-60 parts of isophthalic acid, 50-70 parts of neopentyl glycol, 10-14 parts of ethylene glycol, 18-24 parts of fluorine-containing dihydric alcohol; through reasonable matching of the components, the glass transition temperature of the polyester resin is improved, and the polyester resin has excellent corrosion resistance and weather resistance.

Description

technical field [0001] The invention relates to the technical field of powder coatings, in particular to a polyester resin for powder coatings with corrosion resistance, weather resistance and high storage performance, powder coatings and coatings. Background technique [0002] At present, most of the anticorrosion of steel-plastic pipelines still adopts the traditional painting process, which not only causes environmental pollution, but also has low production efficiency, serious waste of raw materials, poor anticorrosion effect, poor adhesion, and easy peeling of the paint surface, which needs to be carried out at regular intervals. Repainting, while the powder coating production process and actual use will not produce harmful substances, it is an environmentally friendly anti-corrosion material, and has strong adsorption to pipelines, long service life, simple production process, and greatly improves anti-corrosion efficiency. It is widely used in the pipeline industry. F...

Claims

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Application Information

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IPC IPC(8): C08G63/682C08G63/85C09D5/03C09D5/08C09D167/02
CPCC08G63/6826C08G63/85C09D167/02C09D5/03C09D5/08Y02A20/20
Inventor 张冉曹成壮郑忠伟
Owner SHANDONG SHANGHE POWER TECH
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