Compound inorganic flame retardant and application thereof to carrying out flame retardance on EVA (ethylene-vinyl acetate copolymer) composite material

Abstract

The invention relates to a compound inorganic flame retardant and an application thereof to carrying out flame retardance on an EVA (ethylene-vinyl acetate copolymer) composite material. The compound inorganic flame retardant comprises hollow glass microspheres and inorganic flame retardants. By adopting the hollow glass microspheres and the hydroxide flame retardants to carry out synergistic flame retardance on EVA, not only are the oxygen index and vertical flammability reflecting melting and dropping resistance of the EVA material greatly increased and are the parameters such as heat release rate reduced, but also the viscosity of the EVA melts is obviously reduced and the processability of the EVA composite material is improved.

Description

technical field The invention belongs to the technical field of flame-retardant thermoplastic modification, and in particular relates to the compounding of hollow glass microspheres and inorganic flame retardants and their application in flame-retardant EVA composite materials. Background technique According to "Polymer Combustion and Flame Retardant Technology" (edited by Zhang Jun, Ji Kuijiang, Xia Yanzhi, etc., Chemical Press, April 2005), ethylene-vinyl acetate copolymer itself is a relatively flammable polymer material, and its oxygen index It is only 17.0-19.0%, and it increases with the increase of vinyl acetate content, but the char formation rate is low, and molten droplets are generated when burning, so it is required to be flame-retardant modified in many applications. At present, additive flame retardants are mainly used in the flame retardant treatment of ethylene-vinyl acetate at home and abroad. According to "Advanced Polymer Processing Technology" (Polymers ...

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Problems solved by technology

However, although ethylene-vinyl acetate treated with a hydroxide flame retardant or a hydroxide flame retardant and a synergist shows good flame retardancy, low smoke and non-toxicity, and a certain degree of droplet resistance, it is The required addition of flame retardants is relatively large, which reduces the mechanical properties of the material (such as tensile strength, breaking strength)

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