Flame-retardant fireproof plate material and preparation method thereof

Abstract

The invention relates to the technical field of fireproof plates, and discloses a flame-retardant fireproof plate material and a preparation method thereof. Modified benzoxazine, an aromatic bromine modified phosphate flame retardant, polyvinyl chloride, lignocellulose and calcium carbonate are mixed, stirred, pressed, maintained and cut, and the flame-retardant fireproof plate material is obtained. Nitrogen and oxygen six-membered heterocycles in benzoxazine form a stable compound at a high temperature to prevent flame propagation; the silicon element promotes carbonization of combustion products to form a carbonaceous layer, and a cross-linked network formed by silicon-oxygen bonds improves the mechanical property of the fireproof plate material; a net-shaped structure formed by boron-oxygen bonds has high flame retardance; hydrogen fluoride generated by the fluorine element can interrupt the combustion chain reaction; aromatic bromine generates hydrogen bromide to cover the combustion surface, so that a flame-retardant effect is achieved; a carbonization layer is formed on the surface of the fireproof plate material through polymetaphosphoric acid generated by phosphate, so that a flame-retardant effect is achieved; the aromatic bromine modified phosphate flame retardant plays a plasticizing role in polyvinyl chloride, and the mechanical property of the polyvinyl chloride is improved.