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Thermoset fluororesin powder coating preparation method

A powder coating and fluororesin technology, applied in powder coatings, coatings and other directions, can solve the problems of difficult process temperature control, affecting powder color and performance, affecting production efficiency, etc., achieving simple process, good storage stability at room temperature, Good quality product

Inactive Publication Date: 2015-09-23
JUHUA GROUP TECH CENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This makes it difficult to control the temperature of the process, and the existence of wall sticking will inevitably affect production efficiency
On the other hand, the desolvation heat of the spray drying device comes from the circulating hot gas, and the trace resin remaining in the circulating gas will be coked in the gas heater, and these coked products cannot be separated, which will affect the color and performance of the powder

Method used

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  • Thermoset fluororesin powder coating preparation method
  • Thermoset fluororesin powder coating preparation method
  • Thermoset fluororesin powder coating preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) Through the cycle process of vacuuming and high-purity nitrogen replacement, deoxidize the high-pressure reactor to make the oxygen content in the reactor less than 23ppm. Then, by weight fraction, add 40 parts of methyl isoamyl ketone, 60 parts of trichlorotrifluoroethane, 7 parts of hydroxybutyl vinyl ether, 1 part of undecylenic acid, 33.9 parts of n-butyl vinyl ether, Veova9 single 12 parts of body, 1.1 parts of tert-butyl peroxy tert-butyl valerate, and the inside of the kettle was replaced twice with high-purity nitrogen again to remove residual oxygen in the solvent, and 35 parts of chlorotrifluoroethylene and 10 parts of tetrafluoroethylene were introduced. Stir, slowly raise the temperature to 78°C to start the polymerization reaction, end the reaction after 20 hours of polymerization reaction, then cool the reactor to 30°C with cooling water, recover the unreacted gas phase monomer and discharge the material, filter the feed liquid with diatomaceous earth, ...

Embodiment 2～6

[0037] Using the same process as in Example 1, see Table 3 for the specific formulation and process of step (1) thermosetting fluororesin, and see Table 4 for the specific formulation of step (2) thermosetting fluororesin coating composition dispersion.

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Abstract

The invention discloses a thermoset fluororesin powder coating preparation method. The method includes the steps that 1, by weight, polymerized media, fluorine-containing monomers, functional-group-containing monomers, other monomers and initiators react with one another at the temperature of 58 DEG C to 95 DEG C for 10 h to 20 h, discharging and filtering are conducted after unreacted gas-phase monomers are cooled and recycled, and a thermoset fluororesin transparent solution is obtained; 2, by weight, the thermoset fluororesin transparent solution obtained in step 1 is placed into a closed container, then curing agents, titanium dioxide, flatting agents and defoaming agents are added to the thermoset fluororesin transparent solution to be evenly stirred, and thermoset fluororesin coating composition dispersion liquid is obtained; 3, the obtained thermoset fluororesin coating composition dispersion liquid obtained in step 2 is dried, and a thermoset fluororesin powder coating is obtained. The thermoset fluororesin powder coating preparation method has the advantages of being simple in process, high in yield and excellent in product performance.

Description

technical field [0001] The invention relates to a preparation method of a fluorine-containing coating, in particular to a preparation method of a thermosetting fluororesin powder coating. Background technique [0002] Thermosetting fluorocarbon powder coatings have extraordinary weather resistance, corrosion resistance and antifouling properties, and are widely used in: emerging marine engineering - offshore facilities, coastal and bay structures and offshore oil drilling platforms, etc.; modern transportation - Bridges, ships, containers, trains, automobiles, highway and railway guardrails, etc.; important energy industries - oil pipelines, oil tanks, power transmission and transformation equipment, nuclear power equipment and coal mining equipment, etc.; large industrial and mining enterprises - chemical, petrochemical, steel, Pipelines, storage tanks, equipment of chemical fertilizer factories and smelting equipment of large mines, etc. [0003] On the other hand, thermo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D127/18C09D127/16C09D127/12C09D5/03C08F214/24C08F214/26C08F214/22
Inventor 裴金东肖瑞厚刘海波张广欣王树华余晓斌
Owner JUHUA GROUP TECH CENT
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