Ammunition and explosives – Igniting devices and systems
Patent
1976-09-16
1977-10-11
Nelson, Peter A.
Ammunition and explosives
Igniting devices and systems
264 3E, 149 194, 149 195, F42B 516
Patent
active
040529436
ABSTRACT:
A typical rocket motor includes a motor casing containing a cast propellant onded to the casing and provided with a port through which combustion gases are delivered to the motor nozzle. During storage and operation, mechanical stresses in the propellant may produce tears resulting in motor malfunctions. Tear strength can be increased by reactively forming on selected port surface areas a thin-film cross-linked polymeric gel coating formed essentially of a highly functional polyglycol adipate and a polyfunctional isocyanate. Cross-linking with the propellant can be achieved by controlling the hydroxyl to isocyanate ratios of the coating and the propellant. The coating is particularly useful on XLDB (cross-linked, composite-modified double base) and on CMDB (composite-modified double-base) propellants.
REFERENCES:
patent: 3215028 (1965-11-01), Pitchford et al.
patent: 3445306 (1969-05-01), Satriana
patent: 3447980 (1969-06-01), Voigt, Jr.
patent: 3558285 (1971-01-01), Ciccone et al.
patent: 3713395 (1973-01-01), Carpenter et al.
patent: 3960088 (1976-01-01), Greever
patent: 3961476 (1976-06-01), Wasserman et al.
Critchlow Paul N.
Nelson Peter A.
Sciascia Richard S.
The United States of America as represented by the Secretary of
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