High-specific-weight high-zinc-content heavy-duty epoxy zinc-rich primer and preparation method thereof

Abstract

The invention provides a high-specific-weight high-zinc-content heavy-duty epoxy zinc-rich primer. The primer contains a component A and a component B and is characterized in that the component A contains epoxy resin, high-purity zinc powder, environment-friendly zinc phosphate, an assistant A/B, organic bentonite and a mixed solvent; the component B contains cardanol modified polyamide resin, an assistant C and a mixed solvent. The product provided by the invention has the characteristics of salt mist resistance and high specific weight, the solid content reaches 95%, the zinc content reaches 80%, the primer solid proportion reaches 3.0g/ml, and the salt mist resistance can achieve that a primer film is free from bubbling, rusting and peeling for more than 5,000 hours; the product can be extensively applied to the field of metallic heavy-duty products in relatively adverse climates and seaboards, such as bridges, steel structures, ships and petroleum pipelines.

Description

technical field [0001] The invention relates to the field of epoxy zinc-rich primer manufacturing, in particular to a heavy-duty anti-corrosion epoxy zinc-rich primer with high specific gravity and high zinc content and a preparation method thereof. Background technique [0002] Metal corrosion is a very serious problem faced by modern people, and this problem covers almost all fields of social production. Due to corrosion, a large amount of hard-won useful materials become waste, resulting in weakened protection, equipment failure, consumption of resources and huge economic losses, and indirectly caused problems such as environmental pollution. For a long time, people have used many technologies to protect metals and prevent corrosion. One of the most effective methods is to coat the metal surface with an anti-corrosion coating to isolate the corrosive medium from the metal substrate. [0003] Zinc-rich coating is a heavy-duty anti-corrosion coating with excellent corrosio...

AI Technical Summary

Problems solved by technology

However, due to technical and process limitations, the zinc powder content in existing zinc-rich primers is generally below 80%, which cannot guarantee the current transmission between zinc powders and between zinc powders and substrates

[0004] In addition, metals are more likely to be corroded in harsh climates and high salt spray environments such as coastal areas. The salt spray resistance of ordinary antirust paints is often not long enough to meet the needs of equipment.

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