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PVDF (Polyvinylidene Fluoride) fluorocarbon powder coating and preparation method thereof

A powder coating and fluorocarbon technology, applied in powder coatings, epoxy resin coatings, coatings, etc., can solve problems such as large energy consumption and environmental pollution, and achieve the effect of overcoming difficulty in crushing

Inactive Publication Date: 2014-04-02
常州市永丰油脂厂
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the currently dominant fluorocarbon coatings are liquid. In the prior art, the research of PVDF fluorocarbon powder coatings has also been reported. The PVDF powder coating is obtained by decompression distillation to remove the solvent; in the Chinese invention patent application No. 200910052569.1, PVDF is suspended in the solvent, and then the PVDF powder coating is obtained by spray drying; but this type of method still uses an organic solvent in the production process , inevitably pollute the environment, and consume a lot of energy in the process of solvent recovery

Method used

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  • PVDF (Polyvinylidene Fluoride) fluorocarbon powder coating and preparation method thereof
  • PVDF (Polyvinylidene Fluoride) fluorocarbon powder coating and preparation method thereof
  • PVDF (Polyvinylidene Fluoride) fluorocarbon powder coating and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Add 60 kg of PVDF resin, 5 kg of epoxy resin E12; 5 kg of acrylic resin; 15 kg of titanium dioxide; 1 kg of benzoin; 2 kg of BYK-307 leveling agent; German BYK BYK-4510 adhesion promoter 1 kg of agent; 2 kg of fluororubber 246 and 1 kg of boric acid. After the raw materials are melted and mixed at about 120 ° C, they are pressed into tablets, and then crushed into particles with a diameter of 0.5-1.5 cm, and then put into Chengdu Kunsen Micro-Nano Technology Co., Ltd. The KSBR-200 target jet mill produced by the company is finely ground, and the particles with a particle size of ≤30 μm are screened to obtain the finished PVDF fluorocarbon powder coating. The performance test is shown in Table 1:

[0032] Table 1. Fluorocarbon powder coating film performance test result table of embodiment 1

[0033]

[0034] The powder coating is applied to the metal surface with an electrostatic spray gun, and baked at 240°C for 10 minutes. The resulting coating has been subjected t...

Embodiment 2

[0036] Add 65 kg of PVDF resin, 5 kg of epoxy resin E14; 5 kg of acrylic resin; 18 kg of cobalt green; 1 kg of benzoin; 2 kg of BYK-310 leveling agent; German BYK BYK-4510 adhesion promoter 1 kg of agent; 3 kg of fluorine rubber 26 and 2 kg of boric acid. After the raw materials are melted and mixed at about 110 ° C, they are pressed into tablets, and then crushed into particles with a diameter of 1-1.5 cm, and then put into a target jet mill to grind , screened to obtain particles with a particle size of 15-30 μm to obtain the finished PVDF fluorocarbon powder coating, and the performance test is shown in Table 2:

[0037] Table 2. Fluorocarbon powder coating film performance test result table of embodiment 2

[0038]

[0039] The powder coating is applied to the metal surface with an electrostatic spray gun, and baked at 240°C for 10 minutes. The resulting coating has undergone a salt spray test (JIS K5400-9.1) for 5,000 hours, and has no adverse reaction to 10% hydrochlo...

Embodiment 3

[0041] Add 80 kg of PVDF resin, 8 kg of epoxy resin E20; 8 kg of acrylic resin; 20 kg of cobalt green; 1 kg of benzoin; 2 kg of BD-3232 leveling agent; German BYK-4510 adhesion promoter 2 Kg; 1 kg of metafluoride rubber and 3 kg of boric acid. The raw materials are melted and mixed at about 100°C, then pressed into tablets, and then crushed into particles with a diameter of 0.5-1cm. Get particles with a particle size of 15-20 μm to get the finished PVDF fluorocarbon powder coating. The performance test is shown in Table 3:

[0042] Table 3. Fluorocarbon powder coating film performance test result table of embodiment 3

[0043]

[0044] The powder coating is applied to the metal surface with an electrostatic spray gun, and baked at 240°C for 10 minutes. The resulting coating has undergone a salt spray test (JIS K5400-9.1) for 5,000 hours, and has no adverse reaction to 10% hydrochloric acid for 20 minutes.

[0045] The raw materials used in the present invention, unless oth...

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Abstract

The invention relates to a PVDF (Polyvinylidene Fluoride) fluorocarbon powder coating and a preparation method thereof. The coating is prepared from the following raw materials: 50-80 parts of PVDF resin, 2-10 parts of epoxy resin, 2-10 parts of acrylic resin, 10-20 parts of inorganic pigment, 1-2 parts of benzoin, 1-3 parts of a flatting agent, 1-2 parts of an adhesion promoter, 1-3 parts of fluororubber and 1-5 parts of boric acid. The preparation method comprises the steps: tabletting after fusing and mixing the raw materials; then, crushing the obtained tablets into particles with the diameters of 0.5-1.5cm; next, placing the particles into a target jet mill and milling finely; and screening to obtain particles with particle sizes of less than or equal to 30 microns, thus obtaining the finished product of the PVDF fluorocarbon powder coating. The preparation method disclosed by the invention is low in fusing and mixing temperatures and free of solvents so as to achieve energy-saving and environment-friendly effects; the defect that fluorocarbon resin is not easy to crush is overcome by using the target jet mill.

Description

[0001] technical field [0002] The invention belongs to the field of paint industry, and in particular relates to a PVDF fluorocarbon powder paint and a preparation method thereof. Background technique [0003] PVDF is polyvinylidene fluoride. PVDF fluorocarbon coating is currently the top product in metal building coatings. It has the longest proven weather resistance, and has excellent chemical corrosion resistance and excellent mechanical properties. Almost all Most advanced metal buildings use fluorocarbon coatings. However, the currently dominant fluorocarbon coatings are liquid. In the prior art, the research of PVDF fluorocarbon powder coatings has also been reported. The PVDF powder coating is obtained by decompression distillation to remove the solvent; in the Chinese invention patent application No. 200910052569.1, PVDF is suspended in the solvent, and then the PVDF powder coating is obtained by spray drying; but this type of method still uses an organic solvent ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D127/16C09D163/00C09D133/00C09D5/03C09D7/12
Inventor 龚玺王一飞
Owner 常州市永丰油脂厂
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