Inventors:
James H. Godsey - Salt Lake City UT
James L. Jacox - Salt Lake City UT
Robert F. Keller - Salt Lake City UT
Richard J. Legare - Conyers GA
Assignee:
Hercules Incorporated - Wilmington DE
International Classification:
C06B 4910
Abstract:
An improved crosslinked double base propellant composition is provided which has an improved binder system. The binder system is based on nitrocellulose (NC) having an intrinsic viscosity of from about 0. 4 dl. /gram to about 1. 5 dl. /gram and a polyester polyol or polyether polyol (polyol), in which the weight ratio of NC/polyol is from about 0. 03/1 to about 0. 8/1. The binder crosslinking agents are diisocyanates, and the ratio of NCO groups of the diisocyanates to combined OH groups of nitrocellulose and polyol is from about 0. 7/1 to 1. 2/1. Energetic plasticizer such as nitroglycerin comprises from about 68% to about 82% by weight of the binder. The binder contains a stabilizer and is capable of high solids loading, i. e. , 70% to 77% solids.