Research And Application Of Several Flame Retardant Production Processes

The research of flame retardants has a broad application prospect in the field of fire prevention.This dissertation mainly studies the production process and application of several flame retardants.Improve current processes and carry out scale-up reaction to establish the foundation for industrial test.This experiment studies organic flame retardant 2,4,6-tris(2,4,6-tribromophenoxy)-1,3,5-triazine(TTBPC)laboratory scale synthesis and amplification synthesis with tribromophenol,cyanuric chloride and sodium hydroxide as raw materials.Emphasis on the catalyst of reaction and selection of reaction solvent and determination of reaction time and molar ratio of reactants.The molecular structure was characterized by melting point,NMR,elemental analysis and FT-IR and other means of detection.Experimental results show that the synthesis reaction should use water as the reaction solvent,sodium bisulfite as a reducing agent,the molar ratio of reactants : n(Tribromophenol):n(Sodium hydroxide):n(Cyanuric chloride)=3.05:3.4:1;Sodium tribromophenolate with a mass fraction of 50% add dropwise to cyanuric chloride under 5?.reacts at 90? for 6 h;The melting point of product is 225??230? and yield is 91.8%.The whole process using water as a solvent,green and environmentally friendly,There are no solid waste liquid waste will cause pollution.This experiment also has amplified the process,the melting point of product is 225??230? and yield is 83.1%.This experiment studies organic-inorganic hybridization flame retardant melamine hexamethylene phosphonate amplification synthesis with melamine,formaldehyde and sodium hydroxide,phosphorous acid as raw materials.Then react with magnesium carbonate to synthesize a flame retardant melamine hexamethylene phosphonate magnesium salt(MHMPMG);Optimize the synthesis amplification reaction conditions of the complexation reaction,the molecular structure was characterized by melting point,NMR,elemental analysis and FT-IR and other means of detection,determining the optimal reaction conditions for industrial amplification.Experimental results show that the synthesis reaction should use hydrochloric acid as the reaction solvent,magnesium carbonate as the reaction raw materials;n(hexamethylol melamine):n(phosphorous acid)=1:6.3;reacts at 96? for 8 h MHMP can be produced;n(MHMP):n(magnesium carbonate)= 3.25:1.Control p H to 7?9;reacts at 100? for 10 h,yield of the product is 83.1%.Using thermal gravimetric analysis(TGA)to study thermal stability of TTBPC and MHMPMG.Study the flame retardant properties and mechanical properties of TTBPC and MHMPMG in ABS by using limiting oxygen index(LOI),vertical burning(VB),Mechanical performance test.Study the flame retardant properties and mechanical properties of ABS composite material compounded TTBPC and MHMPMG.Testing the flame retardant properties and mechanical properties of the ABS composites added with the compounded two flame retardant.The compound flame retardant has better flame retardant effect,and the cost is more economical and plays a role of suppressing smoke and resisting droplets.