Highly corrosion-resistant shop primer

Abstract

The invention relates to a highly corrosion-resistant shop primer which is prepared from the following raw materials in parts by weight: 45-50 parts of epoxy acrylic resin, 5-10 parts of polyvinyl acetate, 8-10 parts of polyether modified siloxane, 1-3 parts of hydroxyethyl methacrylate phosphate, 0.1-0.3 part of white carbon black, 2-6 parts of mica powder, 20-30 parts of phthalocyanine blue, 2-5 parts of sodium nitrite, 3-7 parts of ethanol, 0.2-0.5 part of a dispersing agent, 20-24 parts of n-butyl alcohol and 1-3 parts of a modified aliphatic curing agent 2280. A coating formed by the shop primer prepared by the invention has excellent adhesion strength, excellent high-temperature resistance, high coating quality, strong weather fastness, excellent corrosion resistance and low use cost.

Description

technical field [0001] The invention relates to a paint, in particular to a high corrosion-resistant shop primer. Background technique [0002] Shop primer is the first paint applied after surface treatment of the steel plate. It can also be called pretreatment primer or maintenance primer. The demand market for shop primer is very broad. The past products include zinc phosphating primer, epoxy zinc-rich paint, epoxy iron red shop primer, and inorganic zinc silicate shop primer. [0003] At present, the quality requirements for shop primers are as follows: it is generally required that a single-layer paint film of about 20μ coated on steel plates should have at least 3 months of rust resistance in marine atmospheres or industrial atmospheres, and at the same time have good corrosion resistance. Impact resistance and toughness, the heat-affected area of ​​the paint film is small and has low toxicity during welding, cutting and pyrotechnic correction, especially when the pai...

AI Technical Summary

Problems solved by technology

However, the shop primers currently on the market often have poor thermal stability, insufficient weather resistance, and unstable coating after film formation during use, which greatly affects the anti-corrosion performance of the coating.

Especially in oil tankers and offshore oil platforms, when the pretreatment primer is used for large-scale steel components, the above situation is more common, and the poor anti-corrosion performance of the coating will cause great damage to the steel structure.

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