Light inorganic silicate fiber reinforcing fireproof paint and preparation method thereof

Abstract

The invention relates to a fireproof heat-insulation paint, in particular to a light inorganic silicate fiber reinforcing fireproof paint which is characterized by comprising the following materials in percentage by weight: 10%-30% of building gypsum powder, 5%-15% of silica sol, 15%-30% of soft clay, 5%-15% of cenospheres, 5%-20% of diatomite, 5%-15% of expanded vermiculites, 2%-10% of silicate fibers, 0.5%-5% of gypsum retarders and 0.5%-2% of damp-proofing agents. The light inorganic silicate fiber reinforcing fireproof paint is respectively packaged into a solid material and a liquid material and is the fireproof heat-insulation paint which has the advantages of environmental protection, acid-alkali resistance, light weight, noninflammability, heat insulation and sound absorption function.

Description

technical field [0001] The invention relates to a fireproof and thermal insulation coating, in particular to a light inorganic silicate fiber reinforced fireproof coating. The coating of the invention is suitable for fireproofing of buildings such as tunnels, underground garages, steel structures, and prestressed concrete structures. Background technique [0002] Fireproof coating refers to a type of coating that is applied on the surface of objects to prevent fire, prevent the spread of fire or isolate the source of fire, prolong the ignition time of the substrate or increase the thermal insulation performance to delay the structural damage time. According to the main purposes and objects of fire retardant coatings, it can be divided into decorative fire retardant coatings, cable fire retardant coatings, steel structure fire retardant coatings, and prestressed concrete floor slab fire retardant coatings. In addition, with the deepening of research, classifications such as ...

AI Technical Summary

Problems solved by technology

[0003] From the perspective of the composition of fire retardant coatings, it can be divided into two types: one is composed of organic and inorganic substances. This kind of fire retardant coating has poor aging resistance and degradation performance, and may not achieve fire protection effect after being oxidized for a long time. , and produce a large amount of toxic smoke, even if a large amount of flame retardants are added, since the boiling point of general flame retardants is less than 300°C, when a fire occurs, the ambient temperature can be as high as 1000-1200°C, and the flame retardants volatilize, so the fire performance is still not ideal

The other is composed of inorganic components. This kind of fireproof coating has good stability, oxidation resistance and radiation resistance. The fire resistance limit can be improved by increasing the coating thickness, but its decorative effect is poor, the area occupied is large, and the adhesion and physical Poor mechanical properties, poor moisture resistance, easy to crack, pulverize, peel off

Some inorganic fireproof coatings need to be maintained after construction, otherwise the overall strength of the coating will be affected, and sometimes there will be whitening and loosening of the surface, which will increase the difficulty of construction

[0004] In addition, whether it is an organic or inorganic combination of fire retardant coatings, most of them use the method of adding reinforcing fibers to avoid cracking of the coating. The added organic fibers (phenolic fibers, polypropylene fibers) have combustion properties, and it is only effective at low temperatures. However, it cannot avoid the occurrence of high-temperature cracking of the coating; and the added inorganic fibers (glass fiber, asbestos fiber, mineral wool, etc.) If the temperature is not higher than 800°C, the fiber will also lose its reinforcing effect

In addition, due to the great harm of asbestos to the human body, the country has banned the use of