Explosive and thermic compositions or charges – Structure or arrangement of component or product – Solid particles dispersed in solid solution or matrix
Patent
1977-08-01
1978-05-30
Lechert, Jr., Stephen J.
Explosive and thermic compositions or charges
Structure or arrangement of component or product
Solid particles dispersed in solid solution or matrix
149 194, 149 199, 149 1992, 149 20, 149 21, 149 22, 149 76, 149110, 264 3C, C06B 4510
Patent
active
040921891
ABSTRACT:
A method of preparing high burning rate solid propellant grains that have od mechanical properties and the high burning rate solid propellant grains prepared from a multimodal blend of at least one ultra-high burning rate propellant that has been cured and ground to a predetermined particle size of from about 100 microns (0.1 millimeter) to about 5 millimeters and at least one uncured propellant composition that has high tensile strength and compatibility with the ultra-high burning rate propellant and that serves as a binder for the solid propellant grain when cured. The solid propellant grain which has good mechanical and physical properties and a high burning rate burns with a flame that moves through the grain as a plane wave. Even though the individual components have different burning rates, it is the rate of the plane wave through the grain that is controlled by the averaging of the rate of burning through each of the particles of the multimodal blend and the binder propellant.
The method includes preparing a cured ultra-high burning rate propellant that is subsequently ground and screened to a predetermined particle size. The ground and screened propellant is then combined with an uncured propellant that is subsequently cured to yield a high burning rate solid propellant grain with good mechanical properties.
REFERENCES:
patent: 3837938 (1974-09-01), Havey et al.
Edelberg Nathan
Gibson Robert P.
Lechert Jr. Stephen J.
The United States of America as represented by the Secretary of
Voigt Jack W.
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