Preparation method of coating structure with functions of flame retardance and thermal insulation

Abstract

The invention relates to the technical field of functional coatings and aims to provide a preparation method of a coating structure with functions of flame retardance and thermal insulation. The preparation method comprises steps as follows: flame-retardant and thermal-insulation slurry is sprayed to the surface of a substrate through spray painting, and a substrate provided with coating layers is formed; n coating layers are sprayed, the thickness of each coating layer is 40-50 mu m, and n is larger than or equal to 1; during spray painting, the later layer is sprayed after the former layer is air-dried; the substrate provided with the coating layers is subjected to heat treatment in a high-temperature furnace at the temperature of 400 DEG C for 30 min, then the surface is cleaned with clear water, and the coating structure with the functions of flame retardance and thermal insulation is obtained. The thermal conductivity of the product can reach 0.15 W / m*K or be lower than 0.15 W / m*K, and the thermal conductivity of a general thermal insulation coating layer is 0.3 W / m*K; the adhesive force can be higher than the national standard level 1; the coating layer is non-combustible at a high temperature. Therefore, the coating structure with the functions of flame retardance and thermal insulation has the characteristics of high thermal insulation and flame retardance. The cost of raw materials is lower, the preparation technology is simple, and the adhesive force of the coating layers is good; the coating structure adopts a conventional concrete slab or a cement board as the substrate and facilitates large-scale industrial production.

Description

technical field [0001] The invention belongs to the technical field of functional coatings, in particular to a method for preparing a coating structure with flame-retardant and heat-preserving functions. Background technique [0002] Making full use of and saving energy is a major issue in the sustainable development of human beings, and the use of suitable thermal insulation materials is an effective measure to solve this issue. The current thermal insulation coating is mainly sprayed with polyurethane foam and other polymers. With the rapid development of my country's polyurethane industry in recent years, sprayed polyurethane rigid foam has been identified as the preferred material for building thermal insulation and energy efficiency. And it has received extensive attention in the industrial and architectural fields. However, although polyurethane foam insulation material has excellent thermal insulation performance, its main component is organic matter, which is not res...

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Problems solved by technology

However, although polyurethane foam insulation material has excellent thermal insulation performance, its main component is organic matter, which is not resistant to aging, and is flammable. It is easy to cause serious safety problems such as fire when used on a large area of ​​building surface. Therefore, it is necessary to develop a Insulation coating with both thermal insulation performance and flame retardant effect to improve safety performance

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