The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 20, 1990
Filed:
Aug. 04, 1989
Applicant:
Inventor:
Minn-Shong Chi, Newark, DE (US);
Assignee:
Thiokol Corporation, Ogden, UT (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C06B / ;
U.S. Cl.
CPC ...
149 199 ; 149 76 ;
Abstract
A composite propellant composition consisting essentially of ammonium perchlorate as an oxidizer, a carboxy-terminated polybutadiene binder, ammonium sulfate as a cooling agent, and a small proporation of at least one copper compound which functions as a ballistic modifier to lower the pressure exponent of the propellant over a useful pressure range for combustion of the propellant in a gas generator or other device. The copper compounds also lower the .pi..sub.k value of the composition, particularly at pressures exceeding 3000 psi (about 2000 N/cm.sup.2). Specifically exemplified copper compounds are copper chromite, copper phthalocyanine, and copper stearate.