Cordant Technologies Inc.

Morton Thiokol Inc.

Roger R Hendrickson

Robert B Wardle

Thomas K Highsmith

R Scott Hamilton

Corey S McLeod

A process is disclosed for producing prills comprised of ammonium dinitramide The prills can include, if desired, one or more thermal stabilizers, and processing aid(s). Solid particulate ADN is introduced into the top of a melting column, allowed to melt to form pre-prills while passing through a hot-zone ('heated zone') in the prilling column. The pre-prills are allowed to spheridize in the presence of an upwardly blown inert medium which is counter current to the path of the ADN in the prilling column. The flow is designed not to blow the ADN out of the prilling column. The rate of spheridization (prill formation) can, if desired, be accelerated by providing additional cooling, such as refrigeration, to the cooling zone in the prilling column. The ADN prills are suitable for use in propellants.

Thermally-stabilized prilled ammonium dinitramide particles, and process

There is provided an improved process for preparing a composite propellant comprising (a) a polymeric binder, (b) a bonding agent, (c) a curing agent for the binder, (d) a metallic fuel, and (e) an ammonium salt oxidizer wherein the improvement resides in adding the metallic fuel to the propellant mix after all of the ammonium salt oxidizer has been added to the propellant mix.

Method for preparing propellants by late addition of metallic fuel

Composite solid propellants are provided containing, in an amount effective to reduce the burning rate of the propellant, at least one bitetrazole compound.

Growing community of inventors

Bear River City, UT, United States of America

Roger R Hendrickson