Method for preparing small particle size coated ammonium perchlorate

摘要

A method for preparing aziridine coated ammonium perchlorate (AP) of weight median diameters (WMD) ranging from about 0.25 to about 5. 0 micrometers is disclosed. The method employs either an unlined stainless steel or a polyurethane lined vibro-energy grinding mill wherein a high purity aziridine compound is used as the grinding aid and the coating agent for the AP. The coated AP product extends the pot-life for hydroxyterminated polybutadiene (HTPB) propellant formulations.