Abstract:
Proposed is an emulsion explosive composition containing 80% to 95% by weight of an oxidizing agent aqueous solution containing hydrogen peroxide, nitrate, and diethylene triamine penta(methylene phosphonic acid) (DTPMPA), 0.1% to 10% by weight of an emulsifier, and 2% to 15% by weight of an oil. The emulsion explosive composition can effectively solve self-gassing problems caused by a reaction between hydrogen peroxide and nitrate.
Abstract:
A high density, generally recognized as safe hybrid rocket motor is described which has a density-specific impulse similar to a solid rocket motor, with good performance approaching or equal to a liquid rocket motor. These high density hybrid motors resolve the packaging efficiency/effectiveness problems limiting the application of safe, low cost hybrid motor technology.
Abstract:
The present application discloses an improved electrically controlled propellant wherein the electrically controlled propellant comprises at least one compound selected from the group comprising organosilanes, siloxanes, and poly(dimethylsiloxane)s.
Abstract:
A percussion primer composition including at least one explosive, at least fuel particle having a particle size of about 1500 nm or less, at least one oxidizer, optionally at least one sensitizer, optionally at least one buffer, and to methods of preparing the same.
Abstract:
According to the present invention, the ignition, combustion and explosion of hydrogen-air mixtures are dependent primarily on the presence of active intermediates (free atomic hydrogen, atomic oxygen and hydroxyl radicals) that serve as chain carriers and enable the propagation of reaction chains. These active intermediates rather than thermal energy are of primary importance to the oxidation process. The proposed inhibitor molecules capture these active intermediates. This capturing in turn suppresses the reaction chains. As a result, the oxidation of hydrogen in air, including the transition to combustion, the intensity of combustion, the transition from combustion to explosion and the intensity of explosion vary inversely with the inhibitor content. Even when the amount of inhibitor is too small to prevent ignition, a greater ignition source is needed and the intensity of combustion is reduced. The transition from combustion to explosion is also made more difficult or prevented. Moreover, the intensity of explosion, if it occurs, will be decreased. Consequently, the choice of inhibitor and control of its concentration in a hydrogen-air mixture provides for a method of regulating (1) the transition to combustion, (2) the intensity of combustion, (3) the transition from combustion to explosion and (4) the intensity of explosion. The proposed inhibitors include saturated or unsaturated hydrocarbons with one to eight carbon atoms that have a normal structure, an isostructure or a cyclical structure, including aromatics, and mixtures of such hydrocarbons.
Abstract:
A cap-sensitive flexible explosive composition of reduced flammability is provided by incorporating a finely divided, cap-sensitive explosive in a flame resistant polymeric binder system which contains a compatible flame retardant material.
Abstract:
An explosive composition is provided including as a sensitizer, a mixture of metriol trinitrate and diethylene glycol dinitrate, and including dimethylformamide as a polar compatibility additive.
Abstract:
A class of alkoxy substituted aromatic stabilizers is provided for double base propellant. These stabilizers are soluble in the energetic plasticizer employed in the propellant. These stabilizers are particularly suitable and useful in diisocyanate crosslinked composite modified double base propellant because they do not react with the crosslinking agents during preparation of the propellant and impart improved thermal stability to such propellants.
Abstract:
The invention is based on the discovery that when at least a part of the initial burning surface of an epoxy cured carboxy terminated rubber type composite propellant is coated with a propellant antioxidant material, an increase in resistance to oxidative hardening and an increase in strain capability is imparted to said surface. The invention provides (1) such a composite propellant coated at an initial burning surface with a propellant antioxidant in an amount sufficient to impart those unexpected improvements, (2) method involving coating the burning surface with the requisite amount of the propellant antioxidant material, and (3) a propellant rocket motor containing the above said propellant. When only a portion of the surface is subject to high strain, e.g. in slot areas, it is sufficient that only that portion of the burning surface be coated.
Abstract:
A ferrocenyl thiol compound is reacted with an unsaturated prepolymer to form a polymeric material suitable for use as a binder in composite propellant.