Aqueous rust-conversion rust-inhibiting primer

Abstract

The invention relates to a water-based rust conversion antirust primer which is characterized in that: the primer comprises the following components with the corresponding percentage by weight : main conversion agent 5-35, auxiliary conversion agents 2-15, film forming material 40-55, penetrant 0.2-1.0, humectant 1-10, anti-forming agent 0.1-0.5, corrosion inhibitor 0.2-0.5 and solvent 0.5-8; the process is as follows: adding deionized water to a charging basket and heating the water to 60-80 DEG C with aliphatic alcohol polyethenoxy ether added, adding propylene glycol and starting a high-speed dispersion machine for agitation, later on adding tributyl phosphate, potassium sorbate, tannic acid and one of the auxiliary conversion agents and cooling down to 20-33 DEG C after agitating for 30-55 minutes, and adding vinyl chloride-modified acrylic resin latex and discharging material after agitating for 10-20 minutes. The invention has the advantages of direct application to steel surfaces with rust, thorough conversion of rust, excellent adhesive force of a conversion film, good flexibility, adaptation to various forms, and good compatibility with various top coatings.

Description

technical field [0001] The invention relates to a water-based rust conversion anti-rust primer, which can be applied to any kind of rusted steel surface, without derusting the substrate, and can be directly applied to convert it into a primer with good antirust performance, which belongs to the primer Lacquer technology field. Background technique [0002] According to statistics, the world releases 20 million tons of hydrocarbons into the atmosphere every year, of which 10 million tons are organic solvents, most of which are produced by the coating industry. The organic solvent discharged into the atmosphere during paint manufacturing is 20% of the paint output, and the organic solvent volatilized into the atmosphere during the paint coating process is 50%-80% of the paint amount. These organic volatiles emitted into the atmosphere can poison people and even cause cancer. Organic compounds emitted into the atmosphere react chemically under sunlight, producing many active ...

AI Technical Summary

Problems solved by technology

[0006] 1. Tannic acid and maleic acid only have the transformation effect on iron rust, and cannot form a film after transformation. There are no other film-forming substances in the formula, so that the transformation product has no adhesion, sealing performance, and extremely poor anti-corrosion effect;

[0007] 2. Nonylphenol polyoxyethylene ether has the effect of improving penetration, but it is already a banned surfactant in Europe, and has the risk of genetically changing organisms;

[0008] 3. Sodium nitrite is also carcinogenic and should be limited in use

[0009] The research on water-based rust conversion anti-rust primer abroad began in the 1970s, and it has a history of nearly 20 years in China. Although many technicians have done some work in the conversion of rust and made some progress, they have not been able to solve the problem with resins. There is a problem with cooperation, so it cannot be promoted in the market