Highly-heat-resistant liquid silicate water-based heat-insulating coating material and preparation method thereof

Abstract

The invention relates to a highly-heat-resistant liquid silicate water-based heat-insulating coating material and a preparation method thereof. The coating material comprises the following components by weight percent: 45% to 60% of liquid silicate, 11% to 16% of ion exchange water, 3% to 5% of alkoxy silane, 0.5% to 1.5% of silicate nanopowder, 1% to 2.7% of wetting agent, 1% to 3% of mineral cellulose, 5% to 10% of ludox, 1.5% to 3.5% of ultrafine silica nanoparticle powder, 5% to 9% of sodium borate glass hollow spheres, 0.3% to 1.0% of phosphoric acid aqueous solution and 5% to 10% of inorganic filler. The preparation method comprises the following steps of: evenly mixing the liquid silicate with the ion exchange water; sequentially adding the alkoxy silane and the silicate nanopowder; sequentially adding the wetting agent, the mineral cellulose and the inorganic filler; adding the ludox and the ultrafine silica nanoparticle powder; adding the sodium borate glass hollow spheres; and finally, slowly adding the phosphoric acid aqueous solution, thereby obtaining a target product. The coating material provided by the invention is excellent in water resistance, heat resistance and heat insulation as well as simple in preparation process, broad in raw material source and low in cost, thereby being suitable for large-scale industrial production.

Description

technical field [0001] The present invention particularly relates to a high heat-resistant liquid silicate-based water-based heat-insulating coating and its preparation method, which can be widely used in various high-temperature equipment in industrial and civil fields, such as: ironmaking furnaces, heat treatment furnaces, kilns , high heat transmission pipes, family fireplaces, etc. Background technique [0002] Based on the current situation of global warming and energy saving and emission reduction, people's demand for energy-saving and environmentally friendly products is increasing day by day. For this reason, various countries are actively developing environmentally friendly high-efficiency building materials, and have made corresponding restrictions on the production and use of building materials that waste energy and are harmful to environmental protection. [0003] In recent years, with the rapid development of industries in various countries, ironmaking furnaces...

AI Technical Summary

Problems solved by technology

In order to adapt to this development trend, although many researchers have been involved in the research and development of water-based environmentally friendly liquid silicate-based high-temperature thermal insulation coatings, they have not solved the fatal problem of poor water resistance caused by the swelling and soaking of the coating film.

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