The United States of America as Represented by the Administrator of the

Frank Salazar

James W Bacak

Douglas W Harrington

Carl W Hohmann

Maureen L Dutton

Billy Charles Tipton, Jr

An automated propellant blending apparatus and method uses closely metered addition of countersolvent to a binder solution with propellant particles dispersed therein to precisely control binder precipitation and particle aggregation. A profile of binder precipitation versus countersolvent-solvent ratio is established empirically and used in a computer algorithm to establish countersolvent addition parameters near the cloud point for controlling the transition of properties of the binder during agglomeration and finishing of the propellant composition particles. The system is remotely operated by computer for safety, reliability and improved product properties, and also increases product output.

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Texas City, TX, United States of America

Frank Salazar