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Low pressure exponent propellants containing boron

  • US 5,074,938 A
  • Filed: 05/25/1990
  • Issued: 12/24/1991
  • Est. Priority Date: 05/25/1990
  • Status: Expired due to Fees
First Claim
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1. A cured composite propellant grain consisting essentially of:

  • A. from about 50% to about 75% by weight of an oxidizer consisting essentially of ammonium nitrate;

    B. from about 1% to about 20% by weight of a cured polymeric binder;

    C. from 0% to about 30% by weight of a nitrate ester plasticizer;

    D. from about 3.5% by weight to about 8% by weight of boron in free elemental form; and

    E. from 0% to about 3% by weight aluminum metal;

    said propellant having a pressure exponent not exceeding about 0.30 at a combustion pressure between about 2500 and about 7000 pounds per square inch (between about 1700 and about 4800 N/cm2).

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