Moisture-curing epoxy zinc phosphate over-rust primer

Abstract

The invention provides a moisture-curing epoxy zinc phosphate over-rust primer which is prepared by mixing a component A and a component B in a weight ratio of 8:1, wherein the component A comprises 35-50% of epoxy resin, 5-7% of 509 zinc chrome yellow, 5-7% of 309 zinc chrome yellow, 5-7% of 109 zinc chrome yellow, 5-8% of iron oxide red, 6-8% of zinc phosphate, 5-9% of aluminum tripolyphosphate, 6-9% of diphenyl guanidine chromate, 6-8% of dimethylbenzene, 2-4% of n-butanol and 5-8% of cyclohexanone; and the component B comprises 85-90% of ketoimine modified fatty acid epoxy resin, 5-10% of dimethylbenzene and 3-5% of n-butanol. The invention has the advantages of excellent film-forming property, excellent anticorrosive and anti-rust properties, favorable adhesive force for the substrate, favorable flexibility and favorable impact resistance, and can quickly cure to form a film in a high-humidity environment (the relative humidity is less than or equal to 95%).

Description

technical field [0001] The invention belongs to the technical field of painting, and in particular relates to a moisture-curing epoxy zinc phosphate primer with rust. [0002] Background technique [0003] At present, solvent-based rust-resistant anti-corrosion coatings such as epoxy resin and chlorinated rubber are widely used in harbors, ship repairing, marine development projects, Anticorrosion of metal components in power stations, bridge engineering, petrochemical and other industries. However, in the rainy and humid seasons and coastal areas with alternating dry and wet, the relative humidity of the air is above 80%, which provides conditions for the action of oxygen and water. The corrosion of metal substrates is obviously intensified, and the curing rate of coatings is slower than that of substrates. Speed, the water film is easy to form between the coating and the surface of the substrate, which affects the adhesion of the substrate, and the crosslinking density of...

AI Technical Summary

Problems solved by technology

However, in the rainy and humid seasons and coastal areas with alternating dry and wet, the relative humidity of the air is above 80%, which provides conditions for the action of oxygen and water. The corrosion of metal substrates is obviously intensified, and the curing rate of coatings is slower than that of substrates. Speed, the water film is easy to form between the coating and the surface of the substrate, which affects the adhesion of the substrate, and the cross-linking density of the coating film decreases, which affects the service life and anti-corrosion effect of the coating.

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