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Polyester resin applicable to wooden transfer powder coating, preparation method of polyester resin, and wooden transfer powder coating

A powder coating, wood grain transfer technology, applied in the field of polyester resin, can solve the problems of powder coating yellowing, reducing leveling, affecting the appearance of the coating, etc., to achieve high definition, high leveling, full color effects

Active Publication Date: 2018-12-07
黄山佳杰新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the polyester resins used in wood grain transfer powder coatings on the market mainly increase the activity of the resin and the crosslinking density of the layer surface by adding more additives in the later stage of the reaction, but too much additives, It is easy to make the powder layer yellow and change, reduce the leveling, and seriously affect the appearance of the layer

Method used

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  • Polyester resin applicable to wooden transfer powder coating, preparation method of polyester resin, and wooden transfer powder coating
  • Polyester resin applicable to wooden transfer powder coating, preparation method of polyester resin, and wooden transfer powder coating

Examples

Experimental program
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Effect test

Embodiment 1

[0024] In the synthesis reactor, put 120 parts of neopentyl glycol, 25 parts of 1,4-cyclohexanedimethanol, 20 parts of diethylene glycol, and 25 parts of trimethylolpropane, open the jacket heat transfer oil valve, and raise the temperature to 110 ℃, until the material is completely melted; put in 200 parts of terephthalic acid, 38 parts of adipic acid, and 1 part of monobutyltin oxide, cover the lid of the kettle, turn on the nitrogen protection, heat up to 240 °C for esterification reaction, and maintain it until The resin is transparent, and the acid value measured by sampling is 32mgKOH / g;

[0025] Lower the temperature to 235°C, add 40 parts of isophthalic acid, continue the reaction for 2 hours, and take a sample to measure the acid value to 50 mgKOH / g. The temperature was lowered to 225° C., and the reaction was carried out under vacuum for 2.5 hours. The acid value was 42 mgKOH / g and the viscosity was 3680 mpa.s (200° C.). Add 1 part of antioxidant 1001, lower the tem...

Embodiment 2

[0028] Put 260 parts of neopentyl glycol, 45 parts of 1,4-cyclohexanedimethanol, 25 parts of trimethylpentanediol, and 50 parts of trimethylolpropane into the synthesis reaction kettle, open the jacket heat transfer oil valve, and raise the temperature to 110°C until all materials are melted; put in 20 parts of terephthalic acid, 30 parts of adipic acid, 20 parts of fumaric acid, and 1.5 parts of monobutyltin oxide, cover the lid of the kettle, turn on the nitrogen protection, and gradually heat up to Carry out esterification reaction at 245°C until the resin is transparent, and the acid value is 37mgKOH / g by sampling;

[0029] The temperature was lowered to 235°C, and 400 parts of isophthalic acid was added, and the reaction was continued for 2 hours. The acid value was 56 mgKOH / g by sampling. The temperature was lowered to 220°C, and the reaction was carried out under vacuum for 3 hours. The acid value was 45mgKOH / g and the viscosity was 3650mpa.s (200°C). Add 1.5 parts of ...

Embodiment 3

[0032] In the synthesis reactor, put 380 parts of neopentyl glycol, 55 parts of trimethylpentanediol, 20 parts of 2-methyl-1,3-propanediol, and 45 parts of trimethylolpropane, and open the jacketed heat transfer oil valve. Raise the temperature to 110°C until all the materials are melted; put in 200 parts of terephthalic acid, 60 parts of adipic acid, 60 parts of fumaric acid, and 3 parts of monobutyltin oxide, cover the lid of the kettle, turn on the nitrogen protection, and gradually heat up Carry out esterification reaction at 245°C, maintain until the resin is transparent, and take a sample to measure the acid value to 40mgKOH / g;

[0033] Cool down to 235°C, add 380 parts of isophthalic acid, continue to react for 2 hours, and take a sample to measure the acid value to 60 mgKOH / g. The temperature was lowered to 225°C, and the reaction was carried out under vacuum for 3 hours. The acid value was 40mgKOH / g and the viscosity was 2950mpa.s (200°C). Add 3 parts of antioxidant ...

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Abstract

The invention relates to a polyester resin applicable to a wooden transfer powder coating, a preparation method of the polyester resin, and the wooden transfer powder coating. The polyester resin applicable to the wooden transfer powder coating is characterized by comprising reaction products of terephthalic acid, m-phthalic acid, adipic acid and / or fumaric acid and dihydric alcohol under the effects of a cross-linking agent and a catalyst, as well as antioxidants. The polyester resin contains the following raw materials in parts by weight: 20-200 parts of terephthalic acid, 40-400 parts of m-phthalic acid, 10-100 parts of adipic acid, 10-100 parts of fumaric acid, 100-500 parts of dihydric alcohol, 20-200 parts of a cross-linking agent, 0.5-4 parts of a catalyst and 0.5-4 parts of an antioxidant. Compared with the prior art, the wooden transfer powder coating prepared from the polyester resin disclosed by the invention has the advantages that the layer transfer effects of the coatinginclude the advantages of being full in color, high in leveling property, high in definition and excellent in yellowing resistance and tearing resistance.

Description

technical field [0001] The invention relates to a polyester resin suitable for wood grain transfer printing powder coatings, a preparation method thereof and wood grain transfer printing powder coatings. Background technique [0002] Powder coating wood grain transfer printing technology is a special process that allows the transfer printing ink on high-precision paper to sublimate and penetrate into the interior of the coating at a fixed temperature, so that the profile has a similar wood grain texture effect. Wood grain transfer powder coating will not change the mechanical properties of the original coating, such as hardness, wear resistance, impact resistance, salt spray, aging and other properties. In recent years, it has been widely used in aluminum alloy doors and windows, security doors, fire doors , steel and wood furniture, filing cabinets, computer casings, household appliances, metal decorations and other high temperature resistant metal materials. [0003] Acco...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/672C08G63/52C08G63/685C08G63/676C09D167/06C09D167/02C09D5/02
CPCC08G63/52C08G63/672C08G63/676C08G63/6854C09D5/02C09D167/02C09D167/06
Inventor 许俊杰汪洋俞介兵
Owner 黄山佳杰新材料科技有限公司
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