THERMOPLASTIC EXPLOSIVE COMPOSITION AND METHOD FOR PRODUCTION THEREOF Russian patent published in 2021 - IPC C06B21/00 

FIELD: explosives.

SUBSTANCE: group of inventions relates to the field of technology for production of mixed thermoplastic explosive materials. The thermoplastic explosive composition contains diaminodinitroethylene, 3,4-bis-(4-nitrofurazan-3-yl)-furazan as explosive components and polybutyl methacrylate as an inert additive, at the following ratio of ingredients, wt.%: diaminodinitroethylene - 87 to 93 together with 3,4-bis-(4-nitrofurazan-3-yl)-furazan - 4 to 10, polybutyl methacrylate - the rest. The components of the composition are prepared. The components are mixed using a mixing apparatus. Input control of the powdered components of the mixed explosive composition for compliance of the physical and chemical characteristics of the explosive components with nominal values, namely, the melting point, the mass fraction of acetone-insoluble substances, moisture, volatile substances, the pH of the aqueous extract, is conducted initially. A suspension of the polymer inert component of the mixed explosive composition is taken in the form of polybutyl methacrylate; dissolved in an organic solvent - acetone, at a ratio of 1:5 to 1:7 wt. pts.; sustained until complete swelling to a gel state. The gel-like base of the inert component is introduced into a solution of the energy component of the mixed explosive composition - 3,4-bis-(4-nitrofurazan-3-yl)-furazan in acetone at a ratio of 1:3 to 1:5 wt. pts.; mixed in a mixer to homogeneity. A second powdered energy component - -insoluble diaminodinitroethylene - is introduced into the resulting homogeneous mixture of components. The mixture is mixed while heating until visually observed removal of the visible excess of the solvent – acetone. The mixture is sustained in an exhaust hood and mixed periodically to remove the solvent and eliminate caking. The mixture is dried until complete evaporation of the solvent - acetone - in a muffle furnace at a temperature of no more than 60°C, which is controlled by the weight method. The prepared composition is sent to the stage of pressing in a mould at a pressure of no less than 50 MPa.

EFFECT: reduction in the level of shock-wave sensitivity compared with the prototype is provided while maintaining high power indicators.

2 cl, 2 dwg