Accession Number:

AD0901463

Title:

Ambient Temperature Cure Catalysts for Carboxy Binder Systems.

Descriptive Note:

Technical rept. Jan 70-Mar 72,

Corporate Author:

MIDWEST RESEARCH INST KANSAS CITY MO

Report Date:

1972-04-01

Pagination or Media Count:

207.0

Abstract:

Propellants based on carboxylic acid-epoxide and carboxylic acid-aziridine binder systems and containing up to 85.5 solids AP, Al can be mixed, cast, and cured completely and successfully at 25 or - 1 C. High solids loadings and ease of processing are possible because the chromium catalyst used Cr 2-ethyl hexanoate acts as a surfactant at the concentration level employed. The binder prepolymers to which this cure system has been applied include Telagen CT, PBAN, and HC-434. For the ambient cure system, chromium salts are excellent catalysts for both epoxide and aziridine systems. Catalyst levels vary from 0.5 to 1.5 wt. of the binder depending on the specific prepolymer. Certain propellant ingredients and additives were shown to affect processing andor cure. Surveillance studies of model, binder, and propellant samples have shown no detrimental aging effects due to the presence of the cure catalyst. The CrOct catalyzed propellants age as well as 140 F cured control propellants. The Telagen-epoxide ambient-cured binder system is ready for scale-up beyond the 40-lb. batch scale size, 85.5 total solids propellant demonstrated in this program. Author

Subject Categories:

  • Solid Rocket Propellants

Distribution Statement:

APPROVED FOR PUBLIC RELEASE