High-curing-speed low-viscosity polyurethane metal paint

Abstract

The invention discloses a high-curing-speed low-viscosity polyurethane metal paint. The high-curing-speed low-viscosity polyurethane metal paint comprises the following raw materials in parts by weight: 75-85 parts of tripolymer modified polyurethane, 20-25 parts of water-based acrylic resin, 5-10 parts of water-based phenolic resin, 3-6 parts of fumed silica, 12-15 parts of kieselguhr, 8-12 parts of sepiolite, 5-8 parts of precipitated barium sulphate, 13-16 parts of micro-capsulated red phosphorus, 3-4 parts of a preservative, 2-3 parts of a defoamer, 3-4 parts of a flatting agent and 5-6 parts of pigments, wherein modified polyurethane is prepared from polycaprolactone diol, polycarbonate diol, N,N-bis(2-hydroxyethyl)amino methylene diethyl phosphite, modified polytoluene diisocynate, diethylene glycol, 2-(hydroxymethyl)half-ester phenylborate, glucose, stannous octoate, bis(2-hydroxyethyl)aniline and N-propyl diethanolamine; modified polytoluene diisocynate is prepared by grafting polymerized polytoluene diisocynate with hydroxy siloxane.

Description

technical field [0001] The invention relates to the technical field of polyurethane coatings, in particular to a fast-curing and low-viscosity polyurethane metal coating. Background technique [0002] Most of the large-scale high-temperature liquid storage tanks or pipelines in my country currently use metal pipes, such as carbon steel and stainless steel. Generally, linings are added to the inner walls of these tanks and pipes or paints are directly painted on the inner walls to improve the high temperature resistance and corrosion resistance of these equipment and prolong their service life. Stainless steel or carbon steel tanks or inner walls of pipes are often protected by composite materials, but the process is complicated, the cost is high, and the popularity is low. At present, it is more common to use suitable coatings on the inner wall surface Form a protective coating, this kind of measure is simple and effective to implement, and the cost of use is low. At prese...

AI Technical Summary

Problems solved by technology

Stainless steel or carbon steel tanks or inner walls of pipes are often protected by composite materials, but the process is complicated, the cost is high, and the popularity is low. At present, it is more common to use suitable coatings on the inner wall surface Form a protective coating, which is simple and effective to implement, and the cost of use is low

At present, most coatings used on the inner wall of high-temperature storage tank pipes are polyurethane coatings, but the polyurethane coatings in the prior art are not ideal in terms of flame retardancy, water resistance, and heat resistance.