Water-based rust-proof primer with rust and preparation method thereof

Abstract

The invention relates to the field of chemical anti-corrosion coatings, particularly to a water-based rust-proof primer with rust and a preparation method thereof. The water-based rust-proof primer with rust uses a vinyl emulsion, a core-shell-structured acrylic emulsion and a phosphate-modified acrylic acid emulsion as base materials. The preparation method comprises the following steps: firstly,selecting the main base material, i.e., the vinyl emulsion; then synthesizing the auxiliary base materials, i.e., the core-shell-structured acrylic resin emulsion and the phosphate-modified acrylic emulsion; and then with the above three emulsions as the base materials, mixing the base materials with a rust conversion agent, an antifreezing agent, a wetting agent, an antifoaming agents and otheradditives to prepare the water-based rust-proof primer with rust. The obtained water-based rust-proof primer with rust is low in VOC content, safe and environment-friendly, convenient to construct, good in compatibility with common anti-corrosion topcoats, good in rust conversion effect, strong in adhesion and long in an antirust period, and has wide application prospects.

Description

technical field [0001] The invention relates to the field of chemical anticorrosion coatings, in particular to a water-based antirust primer with rust and a preparation method thereof. Background technique [0002] The treatment of the substrate has a great influence on the protective performance of the coating. Generally, the coating of anti-corrosion coatings has strict requirements on the treatment of the substrate, and the rust removal level is often required to reach Sa2.5 or St3. When the surface corrosion of the substrate is serious, the derusting work needs to spend a lot of manpower. In order to reduce the workload of rust removal, two approaches are mainly taken. One approach is to use low surface finish coatings, which generally have a lower viscosity to facilitate penetration into the substrate. For example, epoxy primer with low surface treatment, which allows the substrate to remain firmly attached to the scale and old paint film; another way is to apply rust...

AI Technical Summary

Problems solved by technology

The disadvantage is that local organic acid residues on the unevenly rusted surface will reduce the protective performance of the paint film. The vinylidene chloride polymer has a large molecular weight, a high glass transition temperature, and low adhesion to the substrate.

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