A super explosion-proof and impact-resistant composite coating and its preparation method

Abstract

The invention provides a super explosion-proof and impact-resistant composite coating and a preparation method thereof. The composite coating provided by the invention is formed by alternate spraying of flexible coating materials and rigid coating materials, and the number of spray coating layers is 2n+1 layers , n is a positive integer; the preparation is as follows: use two high-pressure spraying equipment to perform wet-on-wet lamination spraying alternately, one of which sprays flexible coating materials and the other sprays rigid coating materials; the film thickness of each spraying is 0.10 ‑0.80mm; first spray the flexible coating material to form the first coat, then spray the rigid coating material to form the second coat, then spray the flexible coat material on the second coat, the flexible coat and Rigid coats are sprayed alternately, and the interval between each spray is less than the gel time of the coating. The coating not only has ultra-high tensile strength, tear strength and other properties, but also has good low-temperature flexibility, mechanical properties of elongation at break, good overall performance, and meets the needs of fields with higher requirements for explosion-proof and impact resistance.

Description

Technical field [0001] The present invention relates to the field of coating materials, and more particularly to a super-exploitation impact composite coating and a preparation method thereof. Background technique [0002] The polyurea elastomer coating is combined with the excellent properties of polyurea with rapid spray, on-site curing construction, so that it exhibits unparalleled superiority in the engineering application. The spray polyurea elastomer material has the characteristics of solvent, fast, fast, temperature and temperature irritation, shortness of humidity and temperature, and mechanical properties than traditional coatings. Ships, water conservancy, transportation, machinery, mine wear and other industries have broad application prospects. Currently sprayed polyurea elastomeric materials are widely used in industrial red-proof, especially building waterproof protection, such as roof waterproof protection, floor waterproof and anti-corrosion resistance, tunnel wa...

AI Technical Summary

Problems solved by technology

For example, CN 104497823 A discloses a kind of explosion-proof energy-absorbing polyurea elastic coating and its preparation method. Because the method is to directly add ordinary filler carbon black and titanium dioxide to the amino-terminated polyether and the amino-terminated chain extender, the dispersibility of the filler is Poor, directly affects the mechanical properties of the coating

CN 108192493 A discloses a preparation method of graphene and carbon nanotube reinforced anti-corrosion and bulletproof coatings. In order to improve the dispersibility of inorganic nanofillers graphene and carbon nanotubes, the method introduces disperse agent, and in order to reduce the viscosity, an inert diluent silicone oil is also added. Although it is helpful for the dispersion of inorganic nano fillers, the dispersant and inert diluent do not participate in the chemical reaction, which is unfavorable to the film strength and modulus of the coating.

[0004] CN 111548712 A discloses fast-curing polyurea explosion-proof coating for buildings and its preparation method and CN106753151 A discloses an explosion-proof impact polyurea coating and its preparation method. These two coatings meet the explosion-proof impact performance to a certain extent, but In order to take into account low temperature flexibility, the amount of graphene added should not be too much, and the mechanical properties of tensile strength and tear strength cannot be taken into account at the same time. At the same time, graphene is difficult to disperse. Although it has been modified, the actual dispersion is still difficult to reach the ideal level. The strength is less than 145N / mm, which limits its performance improvement and cannot meet the requirements of explosion-proof and impact-resistant applications with both tensile strength and tear strength.