Synthesis of New Flame Retardant from Enzymatic Hydrolyzed Lignin and Its Flame Retardant Property

Copolymers of enzymatic hydrolyzed lignin,formaldehyde and meta-phenylene diamine were prepared using orthogonal design.The SBR composites containing the copolymer as flame retardant and microencapsulated red phosphorus as acid source were prepared.The effect of addition level of copolymer on the flame retardant property and physical property was investigated.The results showed that,the optimized formulation and preparation condition of copolymer were as follows: enzymatic hydrolyzed lignin 30 g,formaldehyde 0.2 mol,metaphenylene diamine copolymer 0.1 mol,temperature 80 ℃,time 3 min,mass fraction of sodium hydroxide 0.03.When the addition levels of the copolymer and microencapsulated red phosphorus were 60 and 10 phr respectively,the flame retardant rating of SBR composite reached FV-0,and the comprehensive physical property of that was good.