Fluorocarbon powder coating for outdoor iron towers, and preparation method thereof

Abstract

The invention discloses a fluorocarbon powder coating for outdoor iron towers, and a preparation method thereof. The fluorocarbon powder coating is prepared from, by weight, 35-45 parts of polyvinylidene fluoride resin, 8-12 parts of polytetrafluoroethylene resin, 12-16 parts of super weather-proof polyester resin, 20-30 parts of cycloaliphatic epoxy resin, 12-18 parts of acrylic resin, 12-18 parts of epoxy modified alkyd resin, 2-5 parts of polyhexamethylene guanidine, 3-6 parts of modified graphene, 6-10 parts of nano-silica, 0.5-3 parts of nano-alumina, 4-10 parts of barium sulfate, 1.8-2.4parts of silane coupling agent KH-792, 0.2-0.4 part of calcium stearate, 0.3-0.5 part of benzoin, 0.5-1 part of a leveling agent and 4-8 parts of a TGIC curing agent. The fluorocarbon powder coatinghas the advantages of excellent mechanical properties and super strong weather resistance, super strong chemical resistance and super strong leveling property, and has the characteristics of crackingresistance, aging resistance and long service life when applied to outdoor iron towers, and the preparation method is simple, and can achieve industrial production.

Description

technical field [0001] The invention relates to the technical field of coating compositions, in particular to a fluorocarbon powder coating for outdoor iron towers and a preparation method thereof. Background technique [0002] Powder coating is a new type of solvent-free 100% solid powder coating, which has the characteristics of no solvent, no pollution, recyclable, environmental protection, saving energy and resources, reducing labor intensity and high mechanical strength of the coating film. Fluorocarbon powder coatings refer to powder coatings with fluororesin as the main film-forming substance, which have particularly superior weather resistance, heat resistance, low temperature resistance, chemical resistance, and unique non-stick and low friction properties. Different from solvent-based coatings, fluorocarbon powder coatings do not contain volatile compounds (VOC), reduce harm to the human body, comply with ROHS, do not contain toxic heavy metals, are environmentally...

AI Technical Summary

Problems solved by technology

However, pure fluorocarbon system powder coatings have inherent deficiencies in adhesion, pigment and filler wettability, etc., coupled with their high material costs, making pure fluorocarbon system powder coatings progress slowly in market application and promotion.

[0003] In recent years, due to the erratic outdoor climate, strong acid-base environment, high salt spray environment, high temperature difference environment and high humidity environment have put forward severe tests on the use effect and life of traditional anti-corrosion coatings. In the environment, the powder coating is easy to be corroded. In the environment of high temperature difference, the powder coating is easy to crack or even fall off due to expansion and contraction. In the hot and humid environment, the powder coating is easy to absorb moisture and form white spots on the surface, which affects the powder coating Layer usage and appearance properties

Therefore, the current outdoor powder coatings still have disadvantages such as poor chemical corrosion resistance, antibacterial performance, and water resistance, easy to crack, and short service life, which limits their application in the field of industrial chemical heavy-duty anti-corrosion.

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