Self-healing polymer cement waterproof coating and preparation method thereof

Abstract

The invention discloses self-repairing polymer cement waterproof paint and a preparation method thereof. The paint is double-component paint. A liquid material A is prepared from, by weight, 70-80% of polymer emulsion, 0.5-1% of hydroxyethyl cellulose, 3-5% of defoaming agent and the balance water. The powder material B is prepared from, by weight, 20-35% of Portland cement, 5-15% of high-water-absorption polymers-, 3-10% of silica dioxide powder, 1-3% of dispersing agent, 1-3% of water reducing agent, 5-15% of polymer serving as a microcapsule wall material, 3-5% of calcium hydroxide, 10-30% of quartz sand and the balance filler. By means of the technology, by adjusting the hydration rate of cement, the curing speed of the paint is adjusted; the curing time of the pain is controllable, and the paint can be used under the blockage conditions; when cracks appear, water-absorbing polymer can react in time. The paint can be repeatedly used, and active substances at non-crack positions are still in a dormant state and can play a role when cracks appear. The paint is a great breakthrough on the aspect of the building waterproof theory.

Description

technical field [0001] The invention belongs to the technical field of building waterproof materials, and in particular relates to a self-repairing polymer cement waterproof coating capable of automatically repairing leakage defects after leakage and a preparation method thereof. Background technique [0002] Waterproof coatings are excellent materials for waterproofing. At present, the waterproof coatings used in engineering are mainly polymer cement coatings, which have good adhesion to cement-based surfaces and good extensibility. And it can be constructed on wet base. It is very popular in engineering and is more popular in engineering projects. [0003] However, the waterproof coating has good adhesion to the cement (concrete) base surface. When the base concrete (or mortar) cracks, the coating will be pulled to make it break, causing leakage of the building and making the waterproof failure. [0004] Buildings with brick-concrete or concrete structures will have many...

AI Technical Summary

Problems solved by technology

This is a common problem in construction at present. Although scholars have made great efforts in various aspects, due to construction, maintenance and human factors, cracks in mortar and concrete are still inevitable.