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A trifunctional β-hydroxyalkylamide, its preparation method and powder coating composition containing it

A hydroxyalkylamide and trifunctional technology, used in the field of powder coating curing agent, can solve the problems of easy breaking of particles into powder, rough surface of particles, low particle strength, etc., to reduce particle breakage, high evaporation efficiency and high hardness. Effect

Active Publication Date: 2020-02-14
HUANGSHAN HUAHUI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The products made by the above method all have the problems of high water absorption (up to about 1.5%) and easy caking
In addition, due to the low strength of the particles produced by ordinary steel strip cooling and crushing, the particles are easily broken into powder during transportation, the surface of the particles is rough, and the water absorption rate is still high, reaching about 1%.

Method used

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  • A trifunctional β-hydroxyalkylamide, its preparation method and powder coating composition containing it
  • A trifunctional β-hydroxyalkylamide, its preparation method and powder coating composition containing it
  • A trifunctional β-hydroxyalkylamide, its preparation method and powder coating composition containing it

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] A kind of preparation method of trifunctional degree β-hydroxyalkylamide, the composition of main raw material is as follows:

[0063] Adipic acid 40mol%

[0064] Diethanolamine 30mol%

[0065] Monoethanolamine 30mol%

[0066] The catalyst is potassium amide, and the dosage is 1% of the total mass of raw materials.

[0067] The preparation method specifically comprises the following steps:

[0068] A. Add the adipic acid, diethanolamine, monoethanol, and catalyst in the recipe amount into the reaction kettle, and carry out a fully mixed reaction according to the following settings: raise the temperature to 90°C for a full amidation reaction for 3 hours, and wait until there is no solid matter in the reaction kettle After the existence, the temperature was raised to 110°C, and the vacuum reaction was carried out for 2 hours, and the vacuum degree was controlled below 0.01Mpa;

[0069] B. When there is no obvious distillate in the reaction kettle, the temperature is r...

Embodiment 2

[0074] A kind of preparation method of trifunctional degree β-hydroxyalkylamide, the composition of main raw material is as follows:

[0075] Adipic acid 20mol%

[0076] Diethanolamine 40mol%

[0077] Monoethanolamine 40mol%

[0078] The catalyst is lithium diisopropylamide, and the dosage is 2% of the total mass of raw materials.

[0079] The preparation method specifically comprises the following steps:

[0080] A. Add adipic acid, diethanolamine, monoethanol, and catalyst into the reaction kettle, and carry out a fully mixed reaction according to the following settings: raise the temperature to 100°C for full amidation reaction for 2 hours, and wait until there is no solid matter in the reaction kettle After the existence, the temperature is raised to 120°C, and the vacuum reaction is carried out for 1 hour, and the vacuum degree is controlled below 0.02Mpa;

[0081] B. When there is no obvious distillate in the reaction kettle, the temperature is raised to 130°C under ...

Embodiment 3

[0086] A kind of preparation method of trifunctional degree β-hydroxyalkylamide, the composition of main raw material is as follows:

[0087] Adipic acid 50mol%

[0088] Diethanolamine 30mol%

[0089] Monoethanolamine 20mol%

[0090] The catalyst is potassium methylate, and the dosage is 0.5% of the total mass of raw materials.

[0091] The preparation method specifically comprises the following steps:

[0092] A. Add adipic acid, diethanolamine, monoethanol, and catalyst into the reactor, and carry out a fully mixed reaction according to the following settings: raise the temperature to 80°C for a full amidation reaction for 4 hours, and wait until there is no solid matter in the reactor After the existence, the temperature is raised to 100°C, and the vacuum reaction is carried out for 3 hours, and the vacuum degree is controlled below 0.01Mpa;

[0093] B. When there is no obvious distillate in the reaction kettle, the temperature is raised to 160°C under the protection of...

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Abstract

The invention relates to a tri-functionality beta-hydroxyalkylamide curing agent, its preparation method and a powder coating composition containing the tri-functionality beta-hydroxyalkylamide. The preparation method comprises that diethanolamine, monoethanolamine and adipic acid as main raw materials undergo an amidation reaction. The curing agent particles obtained by the preparation method have smooth surfaces, low water absorption and high strength and solve the problem that the beta-hydroxyalkylamide powdery product or particle product obtained by solvent crystallization purification or vacuum distillation, then cooling and fragmentation in the market has a high water absorption rate, can be broken easily, has low strength and can be pulverized easily in the transport process. The product obtained by the preparation method has high hydroxyl equivalent and thus the product can be used for preparation of a thick pinhole-free powdery coating having excellent curing film-forming ability.

Description

technical field [0001] The invention belongs to the field of curing agents for powder coatings, and in particular relates to a trifunctional β-hydroxyalkylamide, a preparation method thereof and a powder coating composition containing the same. Background technique [0002] β-hydroxyalkylamide is a kind of substance with 4-functionality β-hydroxyl, its highly reactive β-hydroxyl can cross-link with the carboxyl group in the resin molecule, so it can be used as a curing agent for carboxyl functional resins In the field of coatings, especially powder coatings. As a new type of powder coating curing agent, β-hydroxyalkylamide can not only provide excellent weather resistance, heat resistance, corrosion resistance and other application properties, but also has the advantages of non-toxic, non-irritating and low-temperature curing, so it is highly regarded Researchers in the field of powder coatings are concerned. [0003] Traditional β-hydroxyalkylamide curing agents for powde...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C233/18C07C231/02C09D167/00C09D5/03C09D7/61C09D7/63
CPCC07C231/02C08K5/20C08K2003/2241C08K2003/3045C09D5/033C09D167/00C07C233/18
Inventor 林光伟杨志萍汤增荣叶敏汪泽军王永垒
Owner HUANGSHAN HUAHUI TECH