Thermal insulating and fireproof board for external wall

Abstract

The invention relates to a thermal insulating and fireproof board for an external wall. The board is prepared by mixing a boron modified phenolic resin composite material with a refractory aggregate, butyronitrile or butylbenzene, inorganic acid or organic acid, a mixture of silicone and sodium dodecyl benzene sulfonate, and a carbon dioxide gas and then curing the materials. With good fireproof and flame resistant performances as well as good thermal insulation property, the thermal insulating and fireproof board for an external wall in the invention also has high strength, and its combustion performance can reach the national A1 grade standard.

Description

technical field [0001] The invention relates to building decoration materials, in particular to a thermal insulation and fireproof board for external walls. Background technique [0002] At present, about 80% of the thermal insulation and decorative panels of building exterior walls are organic combustible materials, including molded polystyrene boards, extruded polystyrene boards and polyurethane foam. The heat distortion temperature of polystyrene board is only 70 degrees Celsius to 98 degrees Celsius, and the glass transition temperature is 100 degrees Celsius. Polystyrene is composed entirely of carbon and hydrogen elements. It is extremely flammable in nature. When burning, the fire spreads quickly, reaching 15 meters per minute. The amount of combustion heat is large, and the amount of smoke is also large. After being exposed to fire, it shrinks and melts. , leading to the generation of cavities in the external insulation system, the burning is violent in the flashove...

AI Technical Summary

Problems solved by technology

Polyurethane insulation materials also produce a large amount of smoke and dust during the combustion process. After the smoke is inhaled by the human body, it will directly cause mechanical obstruction of the respiratory tract, reduce the effective breathing area of ​​the human lungs, and cause casualties.

[0003] Neither phenolic resin nor boron-modified phenolic resin can meet the requirements of fire protection and heat preservation of building exterior walls. Phenolic resin has poor heat resistance, low strength, high brittleness, poor toughness, and poor flame retardant effect, so it is impossible to be used for External wall insulation

Boron-modified phenolic resin only solves the problem of instantaneous high temperature resistance and reduces the thermal conductivity. The instantaneous high temperature resistance is only 600-700 degrees, and its oxygen index is 37-38, which also fails to meet the requirements of external wall fire insulation.