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Preparation method of anti-aging agent for powder coating

An anti-aging agent, powder coating technology, applied in powder coatings, coatings, etc., can solve the problems of reducing the surface quality of powder coatings, poor dispersion of powder coatings, easy aging of powder coatings, etc., to improve scratch resistance. good curing effect and short melting time

Inactive Publication Date: 2018-03-20
安徽迈高化工科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Powder coatings are used in a wide range and are often applied in relatively complex environments. Especially the influence of light, heat and other factors cause powder coatings to be prone to aging. However, the use of existing anti-aging agents can improve the coating’s durability to a certain extent. Anti-aging performance, but the improvement effect is limited. At the same time, the existing anti-aging additives have poor dispersion in powder coatings, which will reduce the surface quality of powder coatings to a certain extent.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A method for preparing an anti-aging agent for powder coatings, comprising the following steps:

[0020] (1) Pulping:

[0021] Disperse the zeolite powder evenly in deionized water to prepare a zeolite powder suspension with a mass concentration of 8.5%, then add 1.2% sodium hydroxymethylcellulose by mass to the zeolite powder suspension, heat and stir evenly to obtain a mixed slurry ;

[0022] (2) Prepare the dispersion:

[0023] Mix maleic anhydride and polypropylene glycol uniformly at a mass ratio of 1:5 and stir for 40 minutes at a speed of 350r / min, then add 4-dimethylaminopyridine with 1.8% maleic anhydride mass, and keep warm at 78°C for 1.5 hours. Obtain the reaction liquid, then feed ammonia into the reaction liquid, the volume ratio of ammonia gas to the reaction liquid is 1:3, then raise the temperature to 55°C, and keep it warm for 3.5 hours to obtain the product;

[0024] (3) Synthesis:

[0025] The mixed slurry prepared in step (1) and the dispersion ...

Embodiment 2

[0031] A method for preparing an anti-aging agent for powder coatings, comprising the following steps:

[0032] (1) Pulping:

[0033] Disperse the zeolite powder evenly in deionized water to prepare a zeolite powder suspension with a mass concentration of 10.0%, then add sodium hydroxymethyl cellulose with a mass concentration of 1.7% to the zeolite powder suspension, heat and stir evenly to obtain a mixed slurry ;

[0034] (2) Prepare the dispersion:

[0035] Mix maleic anhydride and polypropylene glycol uniformly at a mass ratio of 1:7 and stir at a speed of 350r / min for 40min, then add 4-dimethylaminopyridine with 2.4% maleic anhydride mass, and keep warm at 78°C for 1.5 hours. Obtain the reaction liquid, then feed ammonia into the reaction liquid, the volume ratio of ammonia gas to the reaction liquid is 1:3, then raise the temperature to 55°C, and keep it warm for 3.5 hours to obtain the product;

[0036] (3) Synthesis:

[0037] The mixed slurry prepared in step (1) a...

Embodiment 3

[0043] A method for preparing an anti-aging agent for powder coatings, comprising the following steps:

[0044] (1) Pulping:

[0045] Disperse the zeolite powder evenly in deionized water to prepare a suspension of zeolite powder with a mass concentration of 9.2%, then add 1.5% sodium hydroxymethylcellulose by mass to the suspension of zeolite powder, heat and stir evenly to obtain a mixed slurry ;

[0046] (2) Prepare the dispersion:

[0047] Mix maleic anhydride and polypropylene glycol uniformly in a mass ratio of 1:6 and stir at a speed of 350r / min for 40 minutes, then add 4-dimethylaminopyridine with 1.9% maleic anhydride mass, and keep warm at 78°C for 1.5 hours. Obtain the reaction liquid, then feed ammonia into the reaction liquid, the volume ratio of ammonia gas to the reaction liquid is 1:3, then raise the temperature to 55°C, and keep it warm for 3.5 hours to obtain the product;

[0048] (3) Synthesis:

[0049] The mixed slurry prepared in step (1) and the dispe...

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Abstract

The invention discloses a preparation method of an anti-aging agent for a powder coating, and relates to the technical field of powder coating assistants. The preparation method comprises the following steps: (1) preparing dispersion liquid; (2) preparing modified liquid; (3) preparing premixed liquid; (4) mixing the premixed liquid and the modified liquid for reaction, and drying. The invention provides the preparation method of the anti-aging agent for the powder coating, wherein the prepared anti-aging agent has a good curing effect, good heat resistance and good wear-resisting property after being applied to the powder coating; by adding the anti-aging agent prepared by the method, dispersibility and fluidity of a powder coating mixture system are improved, compatibility with components in the powder coating system is good, melting time after mixing is short, and anti-aging property of a powder coating film can be obviously improved. Through high compatibility in the powder coating, hardness of the coating film can be greatly improved, and denseness of the coating can be improved, so that scratch resistance of the coating film is greatly improved.

Description

technical field [0001] The invention belongs to the technical field of powder coating additives, and in particular relates to a preparation method of an antiaging agent for powder coatings. Background technique [0002] Powder coating is a coating that contains 100% solids and is applied in powder form. It is different from general organic solvent-based coatings and water-based coatings. It does not use any organic solvent or water as a dispersion medium, but uses air as a dispersion medium. . Powder coatings are based on resins and pigments and fillers, adding necessary curing agents, additives, etc., mixed according to a certain proportion, the dispersion after melting and extrusion is cooled, then micro-crushed according to the predetermined particle size, and finally classified and screened. Made of powder coatings. Powder coatings are used in a wide range and are often applied in relatively complex environments. Especially the influence of light, heat and other factor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D5/03C09D7/61C09D7/65C08G65/332
CPCC09D5/033C08G65/3322
Inventor 刘厚武
Owner 安徽迈高化工科技有限公司
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