Preparation method of compound acrylate resin coating for heat isolation and corrosion protection of pipeline

Abstract

The invention discloses a preparation method of a compound acrylate resin coating for heat isolation and corrosion protection of a pipeline. The preparation method has the advantages that the acid andalkaline modification is performed on the basis of lanthanum oxide and cerium oxide, so that the anti-corrosive property and anti-aging property are improved; the rare earth ions can form coordination bonds with polarity groups of hydroxyl groups, hydroxymethyl groups and the like in the molecules of the base material, so that the coating can produce coordination polymerizing and drying, and thequick dryness of a paint film is improved; a superfine silicon dioxide aerogel is respectively subjected to hydrophobic and hydrophilic modification by trimethylchlorosilane and 3-aminopropylsilanetriol, the hydrophobic groups and hydrophilic groups are respectively grafted to the surface of the superfine silicon dioxide aerogel, the good compatibility with the compound base material is realized,the microsphere is tightly bonded with the base material, the interface heat drag is smaller than the air heat drag, and the heat isolation effect is improved; a chlorosulfonated polyethylene emulsionand a styrene-acrylic emulsion are compounded, so that the anti-aging property and the anti-corrosive property of the coating are improved.

Description

technical field [0001] The invention relates to the technical field of heat-insulating coatings, in particular to a method for preparing a composite acrylic resin coating used for heat-insulating and anti-corrosion pipelines. Background technique [0002] In the petroleum refining and chemical industry, a large number of explosion and fire accidents are caused by pipeline oil and gas leakage caused by corrosion every year, which will cause huge human and financial losses. 30%. At present, petrochemical pipelines usually use a composite layer formed by "anticorrosion layer + heat insulation layer + protective layer" to achieve protection. The anti-corrosion layer is usually a general anti-corrosion primer; the thermal insulation layer is traditional rock wool and aluminum silicate roll felt, about 10-20 cm thick; the protective layer is a galvanized iron sheet or aluminum sheet with a diameter of 1-2 meters. The actual petrochemical pipelines are often relatively dense. Thi...

AI Technical Summary

Problems solved by technology

At present, most of the work focuses on the effect of the content and type of hollow microspheres on the thermal insulation effect, and little is involved in the mechanical properties, high temperature resistance and anti-corrosion properties of the coating itself.

In addition, the reported coatings generally need to be cured at a high temperature of 180-250 °C, which is not convenient for large-scale construction and application, and is also not conducive to energy saving and emission reduction. At the same time, the anti-corrosion performance is limited.