×

Active binder propellants incorporating burning rate catalysts

  • US 4,139,404 A
  • Filed: 06/15/1976
  • Issued: 02/13/1979
  • Est. Priority Date: 07/02/1975
  • Status: Expired due to Term
First Claim
Patent Images

1. An active binder propellant composition comprising, by weight:

  • (A) a nitrocellulose binder in the range 8-99.9 percent;

    (B) oxidizer or monopropellant in the range 0-60 percent; and

    (C) a burn rate catalyst, in the range 0.01-20 percent, which consists of certain decahydrodecaborate salts, having the common anion B10 H10-2 wherein the cation is selected from the group consisting of;

    (i) ammonium, wherein the salt has the formula (NH4)2 B10 H10 ;

    (ii) hydrazinium, wherein the salt has the general formula (NH2 NH3)B10 H10 ;

    (iii) substituted ammonium cations, wherein the salt has the general formula (R3 NH)2 B10 H10, wherein further R is selected from the group consisting of hydrogen and alkyl radicals containing less than six carbon atoms;

    (iv) substituted hydrazinium cations, wherein the salt has the general formula (R2 NNR2 H)2 B10 H10 wherein further R is selected from the group consisting of hydrogen and alkyl radicals containing less than six atoms,wherein said burn rate catalyst is further the resultant product of a coprecipitation of one of said group of decahydrodecaborate salts, and a solid oxidizing agent, by the process of;

    (i) dissolving both the decahydrodecaborate (-2) salt and the solid oxidizing agent in a mutually soluble solvent, at a temperature sufficiently high to maintain said salt and said oxidizing agent in solution;

    (ii) forming a pressurized stream of said solution and bringing said solution stream together with a pressurized stream of a miscible nonsolvent, under conditions of extreme turbulence within a mixing chamber, to effect a substantially complete coprecipitation;

    (iii) recovering the coprecipitated product by filtering the effluent from said mixing chamber, and washing said product with an inert and nonsolvent fluid;

    (iv) drying the product to remove all remaining fluid.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×