A processing method for increasing propellant burning rate

Explosive and thermic compositions or charges – Structure or arrangement of component or product – Solid particles dispersed in solid solution or matrix

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264 31, C06B 2100, C06B 4510

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046558608

ABSTRACT:
The effectiveness of the burning rate accelerator, iron oxide (Fe.sub.2 Ob.3), is enhanced, and a markedly improvement in the mechanical properties of a propellant composition are simultaneously achieved as a result of grinding a composite propellant paste in a roller mill instead of in a conventional sigma blade propellant mixer. The propellant paste is composed of a hydroxyl-terminated polybutadiene prepolymer, fluid-energy mill-ground ammonium perchlorate, dioctyl adipate, aluminum oxide, isophthaloyl bis-1-(2-methylaziridine), and iron oxide. The final product has a higher stress capability, higher strain capability, higher modulus, and higher gel fraction, and a burning rate that is about 80% higher as compared with sigma blade propellant ground and mixed propellant.

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