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Thermosetting fluorine powder coating resin and its preparing method

A powder coating and thermosetting technology, applied in powder coatings, coatings, etc., can solve the problems of high resin manufacturing cost, complex process, and difficult operation control, etc., achieve excellent construction performance, simple synthesis process, and reduce production costs.

Inactive Publication Date: 2009-06-03
辽宁氟材料研究院有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The fluorine powder coating resin obtained by this method has the characteristics of excellent weather resistance, high gloss, and high impact strength, but this method has the disadvantages of high resin manufacturing cost, complicated process, and difficult operation control.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] A 2L high-pressure reaction kettle with electromagnetic stirring is used. There is a jacket heating and cooling device inside the kettle, and an electric heating device is attached to the outer wall of the kettle. Before the experiment, the high-pressure reaction kettle was vacuumed and deoxidized, and the oxygen concentration in the kettle was less than 45ppm. Then, 1092.0g trifluorotrichloroethane, 300.0g deoxygenated deionized water, 123.1g vinyl butyrate, 51.0g hydroxybutyl vinyl ether, 81.1g vinyl tertiary carbonate, 7.0g methacrylic acid, replace twice with high-purity nitrogen in the kettle, remove residual oxygen in the recovery solution, feed 219.0g chlorotrifluoroethylene, while stirring, slowly heat up, when When the temperature rises to 35°C, add 3.5g of diisobutyryl peroxide with a high-pressure metering pump to maintain the reaction temperature between 33 and 37°C. After 4 hours, cool the autoclave with water to stop the reaction, and discharge the remainin...

Embodiment 2

[0063] The operation steps and equipment are the same as in Example 1, except that the difference from Example 1 is: add 936.0g trifluorotrichloroethane, 400.0g deoxygenated deionized water, 61.1g vinyl acetate, 53.0g hydroxypropyl vinyl ether, 84.2g Vinyl tert-carbonate, 11.0g undecylenic acid. 242.0 g of chlorotrifluoroethylene was introduced. When the temperature rises to 50°C, add 15.5g of diisopropyl peroxydicarbonate with a high-pressure metering pump to maintain the reaction temperature between 48 and 52°C. After 8 hours, cool the autoclave with water to stop the reaction, and discharge the remaining residue in the reaction kettle. Unreacted monomer. Add 600.0 g of deionized water to the kettle twice, and recover the solvent by distillation under reduced pressure. Finally, 406.0 g of granular polymer was obtained. The experimental data and the physical properties of the copolymers are listed in Table 1.

Embodiment 3

[0065] A 2L high-pressure reaction kettle with electromagnetic stirring is used. There is a jacket heating and cooling device inside the kettle, and an electric heating device is attached to the outer wall of the kettle. Before the experiment, the high-pressure reactor was vacuumed and deoxidized, and the oxygen concentration was less than 45ppm, and then 750.0g deoxygenated deionized water, 68.8g vinyl acetate, 42.2g hydroxyethyl vinyl ether, 109.2g tertiary vinyl carbonate, 3.7g undecene were added acid, replace the kettle with high-purity nitrogen twice to remove the residual oxygen in the recovery solution, feed 250.0g tetrafluoroethane, then feed 233.0g chlorotrifluoroethylene, and slowly heat up while stirring, when the temperature When the temperature rises to 55°C, use a high-pressure metering pump to add 12.7g of dicyclohexyl peroxydicarbonate to maintain the reaction temperature between 53 and 57°C. After 6 hours, cool the autoclave with water to stop the reaction, an...

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PUM

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Abstract

The invention relates to a thermosetting fluorine powder coating resin and its preparing method. Said resin cosegment is composed of monomer chlorotrifluoroethylene, alkanoic acid vinyl ester, hydroxyalkyl vinyl ether, alkyl olefine acid. in presence of organic peroxide initiator, using solution precipitation polymerization process, choicing low boiling mixed solvent of aliphatic halogenated hydrocarbon and deoxy deionizing water, by vacuum distillation, removing and recovering the solvent to synthesize fluorine powder coating resin. The invention has advantages of applying solution precipitation polymerization system, synthesizing thermosetting fluorine powder coating resin with good storage stability, copolymerized resin hydroxyl value 35-55mg KOH / g, acid number3.0-8.0mgKOH / g,gamma transition temperature 39-70deg.C. The resin has good intermiscibility with curing agent, good wetting dispersibility with pigment and additive. The coating has good adhesive force, high hardness, high lustre, and good weathering resistance, chemical resistance and decorating.

Description

technical field [0001] The invention relates to a thermosetting fluorine powder coating resin and a preparation method thereof. More specifically, the present invention relates to a thermosetting fluorine powder coating resin mainly composed of chlorotrifluoroethylene and a method for manufacturing the thermosetting fluorine powder coating resin by a solution precipitation polymerization process. Background technique [0002] Powder coatings do not contain solvents at all, can be completely converted into coating films, and have the characteristics of high coating efficiency, good protection and decoration performance, and meet the requirements of the coating industry for saving resources and energy, reducing environmental pollution, and improving work efficiency. , has received extensive attention from all over the world, and thus achieved rapid development. [0003] Solvent-based room temperature curing or medium and low temperature baking fluorine coatings have excellent...

Claims

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Application Information

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IPC IPC(8): C09D127/12C09D5/03
Inventor 巩永忠蔡玉波黄之祥王雷由继业
Owner 辽宁氟材料研究院有限公司
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