Manufacture of propellant compositions and propellant charges

Details Manufacture of propellant compositions and propellant charges Manufacture of propellant compositions and propellant charges

1983-05-27

2000-03-14

Miller, Edward A.

Plastic and nonmetallic article shaping or treating: processes

Explosive or propellant article shaping or treating

149 194, 149 199, 149 1992, G06B 2100

Patent

active

060368942

ABSTRACT:
This invention relates to the manufacture of composite propellants containing rubbery binders and particulate non-binder ingredients. The process consists of curing a mixture of a functionally-terminated hydro-carbon prepolymer and a cross-linking agent to form a viscoelastic first binder composition, mixing the binder with non-binder ingredients to form a plastic propellant, and rubberising at least a part of the plastic propellant by adding to it a further quantity of the cross-linking agent, provided the propellant is formed into a propellant charge while still in a plastic state. The further quantity of the cross-linking agent may be mixed in with the plastic propellant prior to forming, or applied to the surface of the plastic propellant after having been formed into a charge.
In a preferred embodiment of the invention, the prepolymer consists of an hydroxy-terminated polybutadiene having a molecular weight of about 3000 and a functionally of about 2.2, and the cross-linking agent consists of isophorone diisocyanate.

REFERENCES:
patent: 3296043 (1967-01-01), Fluke et al.
patent: 4069365 (1978-01-01), Rembaum
patent: 4092189 (1978-05-01), Betts
patent: 4156700 (1979-05-01), Tremblay et al.
patent: 4196129 (1980-04-01), Rhein et al.
patent: 4337103 (1982-06-01), Elrick et al.

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