A kind of solvent-free anticorrosion antistatic conductive coating and preparation method thereof

Abstract

The invention discloses a solvent-free anticorrosion static conductive coating. The coating is prepared from a component A and a component B in a weight part ratio of 100:(60-70), wherein the component A is anticorrosion static conductive paint which is prepared from the following raw materials in parts by weight: 60-70 parts of polyurethane grafted modified epoxy resin, 16-22 parts of semiconductor coated mica powder, 10-16 parts of hydrochloric acid doped conductive polyaniline and 2-4 parts of wetting dispersant; and the component B is a gamma-aminopropyl triethoxy silane curing agent. The invention also discloses a preparation method of the solvent-free anticorrosion static conductive coating. The coating disclosed by the invention is green and environmentally friendly and has stable static protection property, excellent salt-resistant and photoaging anticorrosion property and perfect mechanical properties while the transmittance of X-brand electromagnetic wave is not lower than 98%; and the coating is mainly applied to corrosion resistance and static protection of high-speed fighter radomes.

Description

technical field [0001] The invention relates to the technical field of electromagnetic functional coatings, in particular to a solvent-free anti-corrosion electrostatic conductive coating with high electromagnetic wave transmittance and a preparation method thereof. Background technique [0002] As a highly integrated airborne radar of light, machinery and electricity, it is the most important long-distance detection precision equipment. It has very high requirements on the temperature, humidity and air purification of the environment. It is usually necessary to install a radar radome to form a closed space to control the internal environment. parameter. In order to ensure the detection distance and accuracy of the radar antenna, the radome is required to have good electromagnetic wave transmission performance in the X-band of 8~12GHz. Therefore, the current radome uses fiberglass composite material to ensure the wave transmission efficiency, but this material is an insulat...

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Problems solved by technology

[0003] At present, domestic conductive coatings are generally solvent-based, which not only requires expensive organic solvents, but also consumes resources and causes serious pollution to the environment.

Coatings with chlorinated rubber as the film-forming substance have poor aging resistance in the South China Sea area, short storage period and service life, and are prone to gel deterioration

Acrylic polyurethane coatings and fluorocarbon polyurethane coatings have excellent aging resistance, but the drying is very slow, and the on-site construction effect is poor

Especially under the high temperature and high humidity environment, the viscosity of the coating will rise rapidly during the on-site construction process, and the coating film is prone to pinholes, which will affect the salt spray anti-corrosion performance

In addition, due to the high dielectric constant of existing domestic electrostatic conductive coatings, the electromagnetic wave transmittance in the X-band is mostly lower than 90%.

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