Roofing polyurethane modified asphalt waterproof paint and preparation method thereof

Abstract

The invention relates to a roofing polyurethane modified asphalt waterproof paint and a preparation method thereof. The paint is prepared from a polyurethane prepolymer, 90# petroleum asphalt, modified nano calcium carbonate, vinyl trichloro silane, a tackifier, n-butyl acetate, citric acid, dibutyltin dilaurate, polyoxyethylene polyoxypropylene ether, fumed silica and a heat insulation material.The preparation method includes: using the polyurethane prepolymer and modified nano calcium carbonate to modify 90# petroleum asphalt; then adding vinyl trichloro silane, citric acid and n-butyl acetate, and stirring the substances evenly; then adding fumed silica, the tackifier, dibutyltin dilaurate and the heat insulation material, and stirring the substances evenly; then adding polyoxyethylenepolyoxypropylene ether and performing further stirring till no powder flotation; subjecting all the materials to shearing again on a high speed shearing machine until the 90# petroleum asphalt and the other materials are evenly dispersed, thus obtaining the product. The product has the advantages of good weather resistance, good heat insulation effect and good dispersibility.

Description

Technical field [0001] The invention relates to a preparation method of a coating, in particular to a polyurethane modified asphalt waterproof coating for roofing and a preparation method thereof, belonging to the technical field of chemical compositions and preparations thereof. Background technique [0002] Petroleum asphalt has good cohesiveness, aging resistance and waterproof ability, and has long been widely used as materials for road construction, waterproofing and sealing. It has the advantages of easy availability of raw materials and low price for waterproof engineering. It is one of the most widely used materials in waterproof and anti-seepage engineering at home and abroad; polyurethane asphalt has a wide range of applications, long life, weather resistance, deformation resistance, and tensile strength High, high elongation, strong adaptability to base layer shrinkage and cracking deformation, superior acid resistance, alkali resistance, anti-corrosion and waterproof ...

AI Technical Summary

Problems solved by technology

[0007] However, in the above-mentioned patent documents, the fillers therein are all unmodified, and there will be obvious disadvantages when filled in the coating: one is that the surface is hydrophilic and oleophobic, and the dispersibility in the coating is poor; the other is that calcium carbonate is combined with the coating body Poor strength, it can only play a compatibilizing role. When filling with a high proportion of calcium carbonate, the performance of the coating material will drop sharply, so that the product is difficult to be processed and used

[0008] And there is no search for polyurethane modified asphalt waterproof coatings for roofing, and the roof is the uppermost outer protective component of the building, which is used to resist the influence of unfavorable factors such as rain, snow, wind, frost, solar radiation, and temperature changes in nature. , to ensure a good use environment inside the building, and the waterproof coating used for the roof should meet the requirements of high weather resistance, environmental protection, not easy to age, long-term performance, thermal insulation, and then achieve the purpose of building energy saving, but there are not many in China at present. Mature technology, people are still researching and experimenting

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