22- 22- 22- 22- AN ENERGETIC PLACITIZER COMPRISING A EUTETIC MIXTURE OF BIS22-DINITROPROPYLFORMAL 22-DINITROPROPYL 22-DINITROBUTYL FORMAL AND BIS22-DINITROBUTYLFORMAL AND A PREPARATION METHOD THEREOF

摘要

PURPOSE: An energetic nitro-formal plasticizer for explosive formulations comprises eutectic mixture mixed with bis(2,2-dinitropropyl)formal(BDNPF), 2,2-dinitropropyl 2,2-dibutyl formal(DNPBF) and bis(2,2-dinitrobutyl)formal(BDNPF). The energetic nitro-formal plasticizer exhibits superior thermal/chemical properties with less production cost. CONSTITUTION: The molecular ratio of BDNPF/DNPBF/BDNPF in formulation of this plasticizer is in the range 20-68%/28-50%/4-30%. The plasticizer is allowed to contain diformal, however its content is desirable controlled to be not more than 3%. The preparation method of this plasticizer comprises the steps of (i) dissolving 2,2-dinitropropanol and 2,2-dinitrobutanol in the mole ratio of 3 to 6:1 at 0 to 30deg.C in an organic solvent like methylene chloride; (ii) at 20deg.C or lower, adding sulfuric acid solution in which formaldehyde sources such as paraformaldehyde and s-trioxane is dissolved; (iii) refining obtained mixture.