Wall alkali-resistant coating

Abstract

The invention relates to a wall alkali-resistant coating, which comprises a component A and a component B, wherein the proportion of the component A to the component B is (1 to 1.8) to (1 to 3); the component A is prepared from 10 to 40 parts of water, 0.2 to 0.5 part of preservative, 4 to 6 parts of diethyl ether, 0.2 to 0.3 part of defoaming agent, and 55 to 95 parts of water-based aliphatic amine modified epoxy curing agent; the component A is produced by the following steps of firstly adding appropriate amount of defoaming agent, preservative and diethyl ether into clear water, uniformly dispersing, adding the water-based aliphatic amine modified epoxy curing agent, uniformly dispersing, adding the defoaming agent, and stirring at low speed for defoaming; the component B is non-solvent type modified bisphenol-A epoxy resin. The wall alkali-resistant coating provided by the invention has good permeability and sealability, has excellent resistance to alkali and salt and water resistance when being applied in the surface of cement mortar, has high strength, and can completely prevent alkaline from overflowing; has resistance to alkali and nitrate superior to that of a traditional water-based polymer emulsion alkali-resistant primer. The wall alkali-resistant coating provided by the invention is water-based and environment-friendly without toxity.

Description

technical field [0001] The invention relates to a building material, in particular to an alkali-resistant coating for walls. Background technique [0002] In the past 30 years in my country, people's living standards have been greatly improved, and indoor home decoration has become more and more luxurious. However, due to insufficient waterproofing of corners or bathrooms or exterior walls, water vapor penetrates into the interior surface, and alkaline substances overflow with water vapor. From time to time, the phenomenon of returning nitrate and efflorescence to long white hair appeared, and the masters in the decoration industry and even the decoration companies were helpless. It is difficult to prevent and eliminate when new houses are decorated, and more than 50% of old houses have such problems that bother people. These parts are repeatedly removed and painted, causing huge waste and losses. There is an urgent need in the market for materials that can completely eradic...

AI Technical Summary

Problems solved by technology

[0003] Nowadays, the majority of paint manufacturers and even some international brands, in the product instructions or specific technical disclosures, all tell that after scraping the putty on the wall and polishing it, first apply the anti-alkali primer and then the top coat, which cannot completely prevent it. The efflorescence on the wall returns to nitration; because the putty layer is always damaged by the efflorescence, which also damages the decorative materials such as wall paint or wallpaper

[0004] First scrape the putty and then apply the anti-alkali primer. The primer is on the putty and cannot protect the wall base, that is, the putty layer; the above-mentioned anti-alkali primers are all traditional water-based polymer emulsion anti-alkali primers, which are not enough to resist the inside of the wall. Because of the spillage force produced by moisture seepage and efflorescence, it cannot protect the bottom layer and decorative layer of the wall; at the same time, solvent-based epoxy resin has a good effect in anti-alkali treatment, but it contains a large amount of volatile harmful substances, which is not environmentally friendly.