Organic silicon modified bi-component solvent-based polyurethane anti-corrosive coating and preparation method thereof

Abstract

The invention discloses an organic silicon modified bi-component solvent-based polyurethane anti-corrosive coating and a preparation method thereof. The coating consists of a component A and a component B, wherein the component A is synthesized from the following raw materials in percentage by mass: 5-70 percent of organic silicon modified polyester polyol, 5-60 percent of pigment-filler, 10-50 percent of mixed solvent, 0-0.05 percent of catalyst, 1-5 percent of flatting agent, 0-0.2 percent of coupling agent, 0.3-0.5 percent of anti-settling agent, 0.1-0.5 percent of wetting dispersant, 0.2-1.4 percent anti-skinning agent and 0.2-0.5 percent of defoaming agent; and the component B is 5-50 percent of TDI-TMP addition product. The coating has the properties of high solid content, high adhesion, high temperature resistance, wear resistance, moisture and heat resistance, resistance to acid attack, hydrophobic property, normal temperature construction and the like, and is suitable for preventing corrosion of ordinary metal and concrete facilities, particularly for preventing corrosion of a desulfurated chimney inner wall of a power station, and overcomes the defects existing in the conventional anti-corrosive coating.

Description

technical field [0001] The invention relates to a polyurethane anticorrosion coating and a preparation method thereof, in particular to an organosilicon-modified two-component solvent-type polyurethane anticorrosion coating. Background technique [0002] At present, coal-fired power generation accounts for more than 70% of the total power generation. According to relevant data, coal-fired power will account for about 62.6% by 2015, and will still account for more than 50% by 2050. It can be seen that the pattern of electricity dominated by coal-fired power will continue to grow. It won't change for a long time. Driven by environmental protection policies, coal-fired power stations have installed flue gas desulfurization facilities, and 95% of these facilities have adopted wet desulfurization technology. Relevant studies have shown that no matter whether the wet desulfurization system is equipped with a gas heat exchanger (GGH) or not, the flue gas temperature of the chimney...

AI Technical Summary

Problems solved by technology

At present, the chimney anticorrosion project not only has the economic problem of high cost, but also lacks scientific analysis and experimental research on the characteristics of chimney corrosion and various anticorrosion technologies, resulting in the failure of chimney anticorrosion after desulfurization in many power stations.

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