Flake zinc powder and nano silica doped epoxy zinc rich primer and preparation method thereof

Abstract

A flake zinc powder and nano silica doped epoxy zinc rich primer includes a main agent and a curing agent in the weight ratio of 15: 1-19: 1. The main agent comprises the following components by weight: 6-12 parts of epoxy resin, 5 parts of a solvent, 68-80 parts of a spherical zinc powder, 2.6-9 parts of a flake zinc powder, 4 parts of nano silica, 1-1.8 parts of an anti-sedimentation agent, 0.4-1.2 parts of a wetting dispersant and 1-3 parts of polyamide wax. The curing agent composition contains the following components by weight: 90-95 parts of a curing agent and 5-9 parts of a solvent. The preparation method is as below: adding epoxy resin into the solvent, and adding the rest of the main agent, grinding and mixing evenly; evenly mixing the curing agent and solvent into a curing agent composition; preparing the main agent and the curing agent according to the mass ratio of 12: 1-19: 1 for preparation of a coating paint; and drying to reach above 80% of solid in the coating film. Addition of the flake zinc powder and nano silica reduces the pore among the particles in the filler and enhances the corrosion resistance.

Description

technical field [0001] The invention relates to a flaky zinc powder and nano silicon dioxide doped epoxy zinc-rich primer and a preparation method thereof. Background technique [0002] Most of the existing zinc-rich primers are packaged in three components: component A includes film-forming base material, solvent, filler and additives, component B is curing agent, and component C is zinc powder, which are mixed according to the specified ratio during construction It is uniform and used after heating. The disadvantage is that the zinc powder content in the formed coating is low. It is inconvenient to weigh many times during construction. It is not easy to stir evenly and affect the anti-corrosion performance of the coating. [0003] In view of this, the present invention is proposed. Contents of the invention [0004] The object of the present invention is to provide a kind of anti-corrosion flaky zinc powder and nano silicon dioxide doped epoxy zinc-rich primer. [0005...

AI Technical Summary

Problems solved by technology

[0002] Most of the existing zinc-rich primers are packaged in three components: component A includes film-forming base material, solvent, filler and additives, component B is curing agent, and component C is zinc powder, which are mixed according to the specified ratio during construction It is uniform and used after heating. The disadvantage is that the zinc powder content in the formed coating is low. It is inconvenient to weigh many times during construction, and it is not easy to stir evenly, which will affect the anti-corrosion performance of the coating.