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A kind of anti-yellowing type β-hydroxyalkylamide curing agent and its preparation method and application

A technology of hydroxyalkyl amide and curing agent, which is used in the field of preparing powder coatings and anti-yellowing β-hydroxyalkyl amide curing agent, can solve the problems of poor anti-yellowing performance, etc., and achieve improved catalytic efficiency and anti-yellowing performance. excellent effect

Active Publication Date: 2021-08-31
HUANGSHAN HUAHUI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] For this reason, the technical problem to be solved by the present invention is to provide a kind of anti-yellowing type β-hydroxyalkylamide curing agent, to solve the problem of poor yellowing resistance of β-hydroxyalkylamide curing agent in the prior art;
[0009] The third technical problem to be solved by the present invention is to provide the above-mentioned anti-yellowing type β-hydroxyalkylamide curing agent for the purposes of preparing powder coatings, which has solved the problem of poor yellowing resistance of HAA type powder coatings in the prior art

Method used

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  • A kind of anti-yellowing type β-hydroxyalkylamide curing agent and its preparation method and application
  • A kind of anti-yellowing type β-hydroxyalkylamide curing agent and its preparation method and application
  • A kind of anti-yellowing type β-hydroxyalkylamide curing agent and its preparation method and application

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Experimental program
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Effect test

Embodiment 1

[0029] The yellowing-resistant β-hydroxyalkylamide curing agent described in this example uses a supported solid super-base catalyst Na / NaOH / Al 2 O 3 Prepare according to the following method: take a certain amount of nano-α-Al 2 O 3 (Particle size of 100-300nm) was added to the reactor, then high-purity argon (purity > 99%) was introduced into the reactor, and then the temperature was slowly raised to 350 ° C for high-temperature dehydration for 4 hours, and then cooled to 200 ° C. Add Metal sodium (controlling metal sodium and α-Al 2 O 3 The mass ratio is 1:5) After fully mixing, the temperature is increased to 500 °C for high temperature calcination for 12 h, and the supported solid super base catalyst Na / NaOH / Al is obtained. 2 O 3 .

[0030] The yellowing-resistant β-hydroxyalkylamide curing agent described in this embodiment is prepared according to the following method:

[0031](1) get diethanolamine 30mol, dimethyl adipate 60mol, add in the reactor 1 and fully mi...

Embodiment 2

[0038] The yellowing-resistant β-hydroxyalkylamide curing agent described in this example uses a supported solid super-base catalyst Na / NaOH / Al 2 O 3 Prepare according to the following method: take a certain amount of nano-α-Al 2 O 3 (Particle size of 100-300nm) was added to the reactor, and then high-purity argon (purity > 99%) was introduced into the reactor, and then the temperature was slowly raised to 400 ° C for high-temperature dehydration for 2 hours, and then cooled to 250 ° C. Add Metal sodium (controlling metal sodium and α-Al 2 O 3 The mass ratio of 1:10) was fully mixed, and the temperature was increased to 650 °C for high temperature calcination for 5 h to obtain a supported solid super base catalyst Na / NaOH / Al 2 O 3 .

[0039] The yellowing-resistant β-hydroxyalkylamide curing agent described in this embodiment is prepared according to the following method:

[0040] (1) get diethanolamine 65mol, dimethyl adipate 30mol, add in reactor 1 and mix fully, and ...

Embodiment 3

[0047] The yellowing-resistant β-hydroxyalkylamide curing agent described in this example uses a supported solid super-base catalyst Na / NaOH / Al 2 O 3 Prepare according to the following method: take a certain amount of nano-α-Al 2 O 3 (Particle size of 100-300nm) was added to the reactor, then high-purity argon gas (purity > 99%) was introduced into the reactor, and then the temperature was slowly raised to 380°C for high-temperature dehydration for 3h, and then cooled to 220°C, adding Metal sodium (controlling metal sodium and α-Al 2 O 3 The mass ratio is 1:8) After fully mixing, the temperature is increased to 580 °C for high temperature calcination for 8 h, and the supported solid super base catalyst Na / NaOH / Al is obtained. 2 O 3 .

[0048] The yellowing-resistant β-hydroxyalkylamide curing agent described in this embodiment is prepared according to the following method:

[0049] (1) get diethanolamine 45mol, dimethyl adipate 40mol, add in the reactor 1 and fully mix,...

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Abstract

The invention belongs to the technical field of powder coating curing agents, in particular to a yellowing-resistant β-hydroxyalkylamide curing agent, and further discloses its preparation method and its application for preparing powder coatings. The anti-yellowing type β-hydroxyalkylamide curing agent of the present invention uses diethanolamine and dimethyl adipate conventionally used in the prior art as raw materials, and is a loaded solid superbase catalyst prepared by means of high-temperature loading and calcination processes Na / NaOH / Al 2 o 3 Made by amidation reaction, the obtained β-hydroxyalkylamide curing agent product has high purity, the alkalinity of the catalyst hardly remains in the product, the final product has a low alkalinity, almost neutral, and the product is durable Excellent yellowing properties.

Description

technical field [0001] The invention belongs to the technical field of powder coating curing agents, and in particular relates to a yellowing-resistant β-hydroxyalkylamide curing agent, and further discloses a preparation method thereof and an 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 coatings and water-based coatings. It does not use solvent or water as a dispersion medium, but air as a dispersion medium, which is evenly coated on the workpiece. A new type of environmentally friendly coating that forms a layer of coating film with special purposes after heating. Compared with conventional coatings, powder coating compositions have no volatile solvents, and have the advantages of no VOC, environmental protection, energy saving, high construction efficiency and wide application range, which are more beneficial to ecology, health and safet...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C231/02C07C233/18B01J23/04C09D167/00C09D7/61C09D7/63C09D5/03
CPCB01J23/04C07C231/02C08K2003/2241C08K2003/3045C09D5/033C09D167/00C07C233/18C08K3/22C08K3/30C08K5/20
Inventor 林光伟杨志萍汪泽军叶敏汤增荣何领王永垒项纯
Owner HUANGSHAN HUAHUI TECH
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