Anti-shedding corrosion-resistant modified epoxy coating and preparation method thereof

Abstract

The invention discloses an anti-shedding corrosion-resistant modified epoxy coating. The anti-shedding corrosion-resistant modified epoxy coating comprises a component A and a component B, wherein the component A is a two-component composition which is prepared by mixing an A component and a B component according to a ratio of 1 to 1.5; the A component comprises the following components in parts by mass: nanometer montmorillonite silicate, a coupling agent and a barrier function filler which are in a mass ratio of 1 to 1 to 1.5; the B component comprises the following components in parts by mass: 20-35 parts of black silicon carbide, 25-30 parts of fine-grained aluminium oxide, 1-5 parts of zinc oxide, 10-15 parts of ethyl orthosilicate, 5-10 parts of auxiliary materials, 40-50 parts of epoxy acrylic resin, 20-35 parts of a polyolefin elastomer, 10-15 parts of talcum powder, 5-10 parts of a thixotropic agent and 0.5-1 part of composite rare earth. The component B further comprises the following components in parts by weight: 10-15 parts of a dispersing agent, 2-6 parts of a wetting agent, 20-50 parts of a curing agent, 2-6 parts of a flatting agent, 5-10 parts of a thickening agent, 5-10 parts of hydroxyethyl cellulose, 1-5 parts of a pH regulator, 50-60 parts of organic silicon modified epoxy resin, 5-10 parts of antimonous oxide and 5-10 parts of a coalescing agents.

Description

technical field [0001] The invention relates to the field of production and preparation of a corrosion-resistant coating, in particular to an anti-shedding and corrosion-resistant modified epoxy coating and a preparation method thereof. Background technique [0002] The steel structure in the atmospheric environment is affected by sunlight, wind and sand, rain and snow, frost and dew, and temperature and humidity changes throughout the year, among which oxygen and moisture in the atmosphere are important factors that cause corrosion of outdoor steel structures, causing electrochemical corrosion; industrial The gas contains SO2, CO2, NO2, CI2, H2S and NH3, etc. Although the content of these components is small, the corrosion hazards to steel cannot be ignored, among which SO2 has the greatest impact, and CI2 can destroy the passivation film on the metal surface ; These gases dissolve in water and become acidic, forming acid rain and corroding metal facilities. [0003] Among...

AI Technical Summary

Problems solved by technology

Epoxy coatings have excellent adhesion, mechanical strength and corrosion resistance, as well as good alkali resistance, water resistance, and insulation, and are one of the most widely used varieties in coatings; but at present, the cost of pure epoxy coatings is high, and China Patent No. CN200810140802.7, the name of the invention is "A Recoatable Universal Epoxy Antirust Paint with a Single Curing Agent Realizing Four Seasons Construction", which discloses a low molecular weight bisphenol A epoxy resin as a base material. The anti-corrosion coating with branched active diluent is introduced into the formula. This patent belongs to pure epoxy resin coating, and the cost is high. Compared with the high-cost pure epoxy resin coating, the cost of modified epoxy coating is low, and its performance can be compared with pure Epoxy coatings rival, attracting attention