Method used for removing gloss of fluorocarbon varnish and applied on surface of steel structure

Abstract

A method used for removing gloss of fluorocarbon varnish and applied on the surface of a steel structure belongs to the technical field of chemical industry. The method comprises the following steps:using 72% of FEVE (fluoroethylene vinylether) fluorocarbon resin, 8% of a curing agent, 15% of a butyl acetate diluent and 5% of TS100 delustering powder as raw materials; placing the FEVE fluorocarbon resin into a high-speed dispersion machine, starting a stirring machine, uniformly stirring the mixture for 5min at the rotation speed of 1,000r / min, adding the TS100 delustering powder, and stirring the mixture for 15min at room temperature at the rotation speed of 2,000r / min; continuously stirring the mixture, adding the HDI curing agent at the speed of 4ml / s and stirring the mixture for 10min; continuously stirring the mixture at the rotation speed of 2,000r / min, adding the butyl acetate diluent at the speed of 2ml / s, stirring the mixture for 10min, stopping stirring, spraying uniformly dispersed low-gloss varnish onto a steel substrate, wherein after spraying is completed, the thickness of a monolayer dry film of a coating is 20mum, and the glossiness of the coating is 5. The methodhas the advantages of simple production process, good weather resistance, anti-corrosion property and high-temperature resistance.

Description

Technical field [0001] The invention belongs to the technical field of chemical engineering, and particularly relates to a method for eliminating the gloss of fluorocarbon varnish applied to the surface of a steel structure. Background technique [0002] Fluorocarbon coating is the collective name of a series of coatings with fluorocarbon resin as the main film-forming material. Fluorocarbon resin has a large number of C-F chemical bonds. The bond energy of C—F bond is as high as 485.6kJ / mol, so the polarity is small and the molecular structure is stable. From the structural point of view, the structural unit of the fluorocarbon resin contains 3 Fs, forming a spiral three-dimensional arrangement to tightly surround each C—C bond in the molecule, filling the gap of the C—C bond, and ensuring the structure to the greatest extent Integrity and tightness, which prevents many liquids and gases from penetrating the paint film. In addition to excellent corrosion resistance, fluorocarbo...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a method for eliminating the gloss of fluorocarbon varnish applied to the surface of steel structures, which solves the problem of reducing the high gloss of high-gloss fluorocarbon varnish as a protective coating for steel materials and affecting vision.