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High-corrosion-resistance fluororesin powder coating composition

A high-corrosion-resistant powder coating technology, applied in powder coatings, anti-corrosion coatings, coatings, etc., can solve the problems of damaged surface gloss, compactness and non-stickiness, rough surface, damaged fluidity, etc., to achieve enhanced protection performance , Improve corrosion resistance, improve the effect of swelling resistance

Inactive Publication Date: 2021-11-05
SHANDONG HUAFU FLUORO CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] These technologies are limited to the use of physical barrier properties of flake mica powder, and damage the fluidity, rough surface, damage to surface gloss, compactness and non-stickiness, and the decrease in fluidity cannot make powder coatings suitable for roll lining molding and other limitations.

Method used

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  • High-corrosion-resistance fluororesin powder coating composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] Substrate treatment and primer-coated test panels were taken out of the oven, sprayed a layer of ETFE / ZSH micro-sheet powder coating composition 1 with a Wagner spray gun while hot, and put into the oven again and baked at 295-300°C for 20 minutes , By baking at a temperature above the melting point of ETFE, the ETFE is melted and leveled to form a film, and the thickness of the film is about 100 μm at a time, and the baking temperature and time are controlled to make the coating smooth and glossy without bubbles. The spray-bake was repeated 3 times to obtain a coated laminate coating. According to the atlas test, the peeling and blistering time is greater than 30 days. The test results are shown in Table 1.

Embodiment 2

[0061] Substrate treatment and primer-coated test panels were taken out of the oven, sprayed a layer of ETFE / ZSH micro-sheet powder coating composition 2 with a Wagner spray gun while hot, and put them into the oven again and baked at 295-300°C for 20 minutes , By baking at a temperature above the melting point of ETFE, the ETFE is melted and leveled to form a film, and the thickness of the film is about 100 μm at a time, and the baking temperature and time are controlled to make the coating smooth and glossy without bubbles. The spray-bake was repeated 4 times to obtain a coated laminate coating. The test results are shown in Table 1.

Embodiment 3

[0063] Substrate treatment and primer-coated test panels were taken out of the oven, sprayed a layer of ETFE / ZSH micro-sheet powder coating composition 3 with a Wagner spray gun while hot, and put them into the oven again and baked at 295-300°C for 20 minutes , By baking at a temperature above the melting point of ETFE, the ETFE is melted and leveled to form a film, and the thickness of the film is about 100 μm at a time, and the baking temperature and time are controlled to make the coating smooth and glossy without bubbles. The spray-bake was repeated 3 times to obtain a coated laminate coating. The test results are shown in Table 1.

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Abstract

The invention relates to a high-corrosion-resistance fluororesin powder coating composition and a preparation method thereof. The high-corrosion-resistance fluororesin powder coating composition can be used for preventing corrosion of a base material and preventing corrosive acid and other chemicals from permeating the base material so as to protect the base material. The existence of inherent pores and defects in a coating formed by fluororesin can accelerate the failure of the coating, so that the application and development of a coating protection technology are limited. Therefore, in order to further enhance the protection performance of the fluororesin coating, the effect of constructing a fluororesin powder coating synergistic protection system is achieved by selecting the multifunctional flaky filler, the flow promoter is optimally fumed silica, and when the fumed silica is used as the high-temperature-resistant powder coating, the composition can be used for electrostatic spraying and also can be used for a roller coating forming process with high requirements on powder fluidity.

Description

technical field [0001] The invention relates to the field of coatings, in particular to a highly corrosion-resistant fluororesin powder coating composition. Background technique [0002] The actual service life of PFA, PVDF, FEP, ETFE and other fluororesins exceeds twenty years. The actual short board of anti-corrosion performance is that the surface gloss of the coating film is inferior to that of ordinary coatings due to the fluidity of the fluororesin after melting. The interface between the coating film and the substrate corrodes the substrate, and the generated gas accumulates at the interface to form bubbles and cause the coating film to peel off. The penetration of strong solvent organic solvents (fluorocarbons at high temperature, some ketones, etc.) will swell the coating film, resulting in a decrease in the strength and deformation of the coating film, and loss of protective properties. These defects make the service life of the fluororesin coating much less than...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D123/08C09D5/03C09D5/08C09D7/61B05D5/00B05D7/24B05D1/38
CPCC09D123/0892C09D5/033C09D5/038C09D5/08B05D5/00B05D7/24B05D1/38B05D7/584C08K7/00C08K3/30
Inventor 宿梅香郭希刚冯奕轩冯波王帅
Owner SHANDONG HUAFU FLUORO CHEM
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