Preparation method of intelligent waterproof coating with self-healing function

Abstract

The invention provides a preparation method of an intelligent waterproof coating with a self-healing function. The method comprises the steps as follows: crushing treatment, preparation of a first dispersion liquid, preparation of a second dispersion liquid, preparation of a mixed dispersion liquid, standing reaction, thixotropic treatment, preparation of a mixed solution, ultrasonic dispersion treatment and defoaming treatment. By the aid of the waterproof coating prepared with the preparation method, when concrete is prone to water seepage due to cracking or cracks make contact with the air,the repair agent can be automatically subjected to a damp curing reaction with seeped water or moisture in the air so as to repair cracks of the concrete, the service life of a concrete material canbe prolonged, the prepared waterproof coating is non-toxic, odorless, safe and environmentally friendly, a special water-resistant structure is formed on the surface of a film of the waterproof coating prepared through ultrasonic dispersion treatment, so that the film surface has very high hydrophobic and waterproof properties, high water resistance, alkali resistance and ultraviolet resistance and higher elongation at break, tensile strength and automatic repair function and cannot be lost easily.

Description

technical field [0001] The invention relates to the field of waterproof coatings, in particular to a preparation method of a self-healing intelligent waterproof coating. Background technique [0002] Concrete material is essentially a heterogeneous porous material. Under the erosion of carbon dioxide, water, chloride ions and sulfates, etc., it is inevitably corroded by external factors. Salt compounds penetrate into the concrete and pass through the water. The evaporation of the salts in the concrete will continue to concentrate, and finally form crystals, and the crystallization process is often accompanied by the increase in volume, which will cause cracking and damage to the concrete material, and the service life of the concrete material will be greatly shortened. [0003] In order to reduce the cracking and damage of concrete materials, waterproof coatings are generally used to protect concrete materials. There are two types of waterproof coatings on the market. One is...

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Problems solved by technology

[0002] Concrete material is essentially a heterogeneous porous material. Under the erosion of carbon dioxide, water, chloride ions and sulfates, etc., it is inevitably corroded by external factors. Salt compounds penetrate into the concrete and pass through the water. The evaporation of salts in the concrete is continuously concentrated, and finally crystallization is formed, and the crystallization process is often accompanied by the increase in volume, which will cause cracking and damage to the concrete material, and the service life of the concrete material will be greatly shortened.

[0003] In order to reduce the cracking and damage of concrete materials, waterproof coatings are generally used to protect concrete materials. There are two types of waterproof coatings on the market. One is polyurethane waterproof coatings, which are generally made of polyurethane and coal tar as raw materials. The other is polymer cement-based waterproof coatings, which are composed of emulsions synthesized by various water-based polymers and high-quality cement mixed with various additives, but the tar gas volatilized by polyurethane waterproof coatings is highly toxic and difficult to remove , the polymer cement-based waterproof coating is not wear-resistant, and the waterproof effect is not good enough

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