Synthesis of Novel Alkyl Phosphinate Double Salt and its Application in PA6

In this paper, zinc magnesium methyl cyclohexylphosphinate double salt (ZnMg (MHP)) was synthesized and used as flame retardant for PA6. The structure and the flammability of ZnMg (MHP) had been studied. The results presented that the LOI of PA6 with 20wt% filler loading improved from 21.2% to 31.4%, and the vertical burning test passed UL94 V-0 rating. TG analyses showed that ZnMg (MHP) had excellent thermal stability. DSC displayed that ZnMg (MHP) melted at 235°C. The tests of flammability revealed that ZnMg (MHP) had a strong inhibition effect on heat release rate (HRR) of the composites.