A New Energetic Mixed Formal Plasticizer, Using Diformal as Eutectic Material

BDNPF/A is a useful energetic plasticizer, but mixed formal, which consists of BDNPF, DNPBF, and BDNBF, is anticipated to be better than BDNPF/A in chemically, thermally and economically. Last year, we successfully synthesized and characterized the mixed formal that has minimum contents of diformal. It is well known that the existing mixed formal always has an 8 ~ 10 % of diformal. At first, we attempted to reduce the diformal content. During this study, we have got the ability to control diformal content variably. In order to control the diformal content, synthetic procedure and reaction condition were modified and adjusted precisely. From this result, we used the diformal as a new eutectic agent and proposed the new component of mixed formal. The thermogravimetry (TG) analysis of the new mixed formal plasticizer shows an acceptable stability for practical applications. This new plasticizer is expected to be cheaper than the existing mixed formal because only one compound of starting material, DNP-OH, is required, DNB-OH will not be used for this process, and the yield of formalization reaction was increased from 75% to more than 90%. Furthermore, this plasticizer does not crystallize at -20 . Finally, we confirmed that the diformal is more effective than the existing eutectic material produced with DNB-OH. The synthesis, characteristics and application of the new two-component mixed formal will be discussed.