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Polyester resin for corrosion-resistant, weather-resistant and flame-retardant powder coating

A technology of polyester resin and powder coating, which is applied in the field of powder coating and coating, and polyester resin for powder coating. It can solve the problems of poor corrosion resistance, complex formula, and high requirements for coating flame retardancy, and achieve excellent performance. Corrosion resistance, strong bond energy, cost reduction effect

Active Publication Date: 2021-07-23
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 complex formulas and poor corrosion resistance.
Moreover, when high-temperature gas or fluid needs to be transported, the flame retardant performance of the coating is required to be high. The existing powder coatings pay less attention to the flame retardant performance, and cannot achieve a satisfactory flame retardant effect, or only pay attention to the flame retardant performance of the coating. Flame retardant effect, the overall performance of the obtained powder coating is not good

Method used

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  • Polyester resin for corrosion-resistant, weather-resistant and flame-retardant powder coating
  • Polyester resin for corrosion-resistant, weather-resistant and flame-retardant powder coating
  • Polyester resin for corrosion-resistant, weather-resistant and flame-retardant powder coating

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preparation example Construction

[0039] The present invention provides the preparation method of above-mentioned polyester resin simultaneously, and the steps are as follows:

[0040] (1) Add the formulated amount of neopentyl glycol, propylene glycol, fluorine-containing glycol, and optional deoxybenzoin into a reaction vessel equipped with a stirring and reflux condenser, mix and stir, and heat and melt at 100-140°C ;

[0041](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;

[0042] (3) Then cool down to 200-210°C, add the formula amount of isophthalic acid, and then continue to gradually raise the temp...

Embodiment 1

[0048] A corrosion-resistant, weather-resistant and flame-retardant polyester resin for powder coatings, the raw material composition and molar ratio are: 119.6g terephthalic acid, 32.3g 2,6-difluoro-terephthalic acid, 93.0 g isophthalic acid g, neopentyl glycol 66.7g, propylene glycol 24.3g, 2,2,3,3-tetrafluoro-1,4-butanediol 25.9g, deoxybenzoin 22.8g; the catalyst is tetrabutyl titanate 0.03mol .

[0049] The preparation method step of polyester resin is as follows:

[0050] (1) Add the formulated amount of neopentyl glycol, propylene glycol, fluorine-containing glycol, and deoxybenzoin into a reaction vessel equipped with a stirring and reflux condenser, mix and stir, and heat and melt at 100-140°C;

[0051] (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 ...

Embodiment 2

[0054] A corrosion-resistant, weather-resistant and flame-retardant polyester resin for powder coatings, the raw material composition and molar ratio are: 119.6g terephthalic acid, 32.3g 2,6-difluoro-terephthalic acid, 93.0 g isophthalic acid g, neopentyl glycol 66.7g, propylene glycol 24.3g, 2,2,3,3-tetrafluoro-1,4-butanediol 25.9g, deoxybenzoin 36.5g; the catalyst is tetrabutyl titanate 0.03mol .

[0055] The preparation method step of polyester resin is as follows:

[0056] (1) Add the formulated amount of neopentyl glycol, propylene glycol, fluorine-containing glycol, and deoxybenzoin into a reaction vessel equipped with a stirring and reflux condenser, mix and stir, and heat and melt at 100-140°C;

[0057] (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 ...

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Abstract

The invention relates to the technical field of powder coatings, in particular to a polyester resin for a corrosion-resistant, weather-resistant and flame-retardant powder coating, the powder coating and a coating, and the polyester resin is prepared from the following components in parts by weight: 102-138 parts of terephthalic acid, 26-38 parts of fluorine-containing dicarboxylic acid, 79-108 parts of isophthalic acid, 56-78 parts of neopentyl glycol, 20-28 parts of propylene glycol and 22-30 parts of fluorine-containing dihydric alcohol. Through reasonable matching of the components, the flame retardant property of the polyester resin is improved, a relatively good glass transition temperature is kept, 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 a corrosion-resistant, weather-resistant and flame-retardant powder coating, a powder coating and a coating. 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. For example, t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D167/02C09D5/03C09D7/61C09D5/18C09D5/08C08G63/682
CPCC09D167/02C09D5/033C09D5/18C09D5/08C08G63/6826C08K2003/2241C08K2003/3045C08K2003/265C08K3/22C08K3/30C08K3/26
Inventor 张冉曹成壮郑忠伟
Owner SHANDONG SHANGHE POWER TECH
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