Preparation method of flame-retardant thermal-insulation slurry

Abstract

The invention relates to the technical field of functional coatings and aims to provide a preparation method of flame-retardant thermal-insulation slurry. The preparation method comprises the following steps: adding a dispersant into deionized water, and stirring at the stirring speed of 800-1000 r / min for 30 min; stirring while successively adding nano-aluminium oxide sol and nano-silica aerogel, and continuously stirring for 1 h; and adding asbestos fiber, continuously stirring for 2 h until uniformly dispersed so as to obtain the flame-retardant thermal-insulation slurry. By the use of the flame-retardant thermal-insulation slurry, a coating structure with flame-retardant and thermal-insulation functions can be prepared. Thermal conductivity of the coating can reach 0.15 W / m.K and below, but thermal conductivity of a common thermal-insulation coating is about 0.3 W / m.K. Adhesive force of the coating can reach the national standard Class 1 and above. In addition, the coating is non-inflammable at high temperature. Thus, the flame-retardant thermal-insulation functional coating structure has characteristics of high thermal insulation and flame retardation. Cost of raw materials is low; the preparation technology is simple; and adhesive force of the coating is good. As a conventional concrete slab or a cement slab is used as a matrix, the coating structure is easy to realize large-scale industrial production.

Description

technical field [0001] The invention belongs to the technical field of functional coatings, and in particular relates to a method for preparing flame-retardant and heat-retaining slurry. 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 resistant to aging, ...

AI Technical Summary

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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