viscose fiber flame retardant 1, fix with original liquid of viscose fiber; 2, no halogen; viscose fiber flame retardantChemical name:     synthesis of 2.2-Dioxa-(5.5-dimethy1-1.3.2-dioxaphosphorinane)-2.2-disulfidemolecular formula: C10H20O5P2S2Cas...