High-performance epoxy zinc-rich antirust primer and preparation method thereof

Abstract

The invention provides high-performance epoxy zinc-rich antirust primer and a preparation method thereof, and relates to the technical field of coating. The primer comprises a component A and a component B. The component A includes: 10-15 parts of water-based epoxy resin, 3-7 parts of organic bentonite, 1-2 parts of polyamide wax slurry, 50-55 parts of zinc powder, 5-10 parts of rare earth praseodymium powder, 2-4 parts of polymerized iron phosphate powder, 10-12 parts of fumed silica, 0.2-1 part of a TEGO-KL245 high-efficiency substrate wetting agent, 1-1.5 parts of an R-760F water-based flash rust inhibitor, 0.5-2 parts of a dispersant, 0.3-0.7 part of an anti-settling agent, 1-3 parts of a cellulose derivative, 4-8 parts of n-butanol, and 100-120 parts of water. The component B includes: 40-60 parts of a cashew nut shell oil modified polyamide curing agent, 4-8 parts of a CMP-410 epoxy resin active toughening agent, 2-4 parts of methyldiethanolamine, 1-2 parts of propylene glycol monomethyl ether, 1-2 parts of a silane coupling agent, 0.1-1 part of a defoamer, 0-0.3 part of a corrosion inhibitor and 30-50 parts of ethanol. The primer has various excellent properties, has excellent salt mist resistance and water resistance and high mechanical strength and meets application requirements.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to a high-performance epoxy zinc-rich antirust primer and a preparation method thereof. Background technique [0002] Various corrosion damages inevitably occur during the use of steel materials, seriously affecting their safety and service life. Therefore, coating protection methods are often used to slow down the damage caused by corrosion of steel materials. Epoxy zinc-rich primer is a special coating composed of epoxy resin and zinc powder as the main raw materials, thickeners, fillers, additives, solvents, etc. It is mainly used for anti-corrosion treatment of steel pipes, storage tanks, steel structures and containers. Epoxy zinc-rich primer has excellent anti-corrosion performance on the substrate, is easy to apply, and has good compatibility with other topcoats. At present, its disadvantage is that the solvent volatilizes and pollutes the environment. With the improvement...

AI Technical Summary

Problems solved by technology

The invention reacts the hydroxyl group of the epoxy resin with phthalic anhydride by modifying the epoxy resin, and introduces a highly polar carboxyl group. The epoxy resin itself becomes a dispersant with strong dispersion ability, which can efficiently disperse and chelate graphite Graphene and resin chelate and evenly disperse in the coating system to achieve the best anti-corrosion effect. In addition, the sheet-like structure of graphene makes the paint film more dense, and the path for corrosive gas to enter is longer to further enhance the anti-corrosion effect , but it uses toluene as a co-solvent, which is neither environmentally friendly nor harmful to the user's human body

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