A processing method for increasing propellant burning rate

Patent · Tue Apr 07 04:00:00 EDT 1987

OSTI ID:6799600

Sayles, D C

A processing method is described comprising milling in a roller mill; a propellant composition paste comprised of about 9.7 weight percent of a hydroxyl-terminated polybutadiene prepolymer binder system with an antioxidant content of about 0.1% to about 0.6% of polybutadiene polymer, and of an isophorone diisocyanate curing agent content of about 0.5% to about 2.0% of polybutadiene polymer; isophthaloyl bis-1-(2-methylaziridine) of about 0.3 weight percent; dioctyl adipate of about 2.0 weight percent; fluid-energy mill-ground ammonium perchlorate of about 86.0 weight percent; aluminum powder of about 1.0 weight percent; and iron oxide of about 1.0 weight percent. The burning rate and mechanical properties of the propellant composition are improved as compared with using a sigma blade mixer to mix a like propellant composition paste, the improvement in burning rate being increased from about 1.6 inches per second to about 2.8 inches per second at about 2000 psi. The mechanical property of stress is increased from about 145 to about 245 psi, the mechanical property of strain at maximum stress being increased from about 40 to about 45%, and the mechanical property of modulus being increased from about 290 to about 950 psi.

• Assignee: The Secretary of the Army, Washington, DC
• Patent Number(s): US 4655860
• OSTI ID: 6799600
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201 -- Chemical & Physicochemical Properties
400800* -- Combustion
Pyrolysis
& High-Temperature Chemistry
ALUMINIUM
AMMONIUM COMPOUNDS
AMMONIUM PERCHLORATES
ANTIOXIDANTS
BINDERS
BUTADIENE
CHALCOGENIDES
CHEMICAL PREPARATION
CHLORINE COMPOUNDS
COMBUSTION PROPERTIES
DIENES
ELEMENTS
HALOGEN COMPOUNDS
HYDROCARBONS
IRON COMPOUNDS
IRON OXIDES
ISOCYANATES
MACHINING
MECHANICAL PROPERTIES
MEDIUM PRESSURE
METALS
MILLING
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PERCHLORATES
POLYENES
POLYMERS
POWDERS
PROPELLANTS
QUANTITY RATIO
STRAINS
STRESSES
SYNTHESIS
TRANSITION ELEMENT COMPOUNDS