Synthesis and Evaluation of Curing Agents.
Final technical rept. 4 Mar 68-2 Sep 70,
ESSO RESEARCH AND ENGINEERING CO LINDEN N J GOVERNMENT RESEARCH LAB
Pagination or Media Count:
Curing agents for both carboxy- and hydroxy-functional prepolymers have been investigated. A series of new di- and trifunctional aziridines based on cis- and trans-2,3-dimethylaziridine have been synthesized and evaluated. These include N-acyl, N-carbamyl, N-sulfonyl, and perfluorobenzene aziridines. Reactivity was found to decrease in the following order N-carbamyl N-acyl perfluorobenzene N-sulfonyl-aziridines. Sulfonyl and perfluorobenzene aziridines require catalysts having higher catalytic activity than ZrAA4. N-carbamyl and N-acyl 2,3-dimethylaziridines were evaluated in CTPB propellants. Considering relative stability, stoichiometry and reaction rate, it was concluded that the trimesoyl trans-2,3-dimethyl aziridine3isophthaloyltrans-2,3-dimethyl aziridine2 is the best combination of tri- and diaziridines for CTPB propellant use of those synthesized and tested on this program. Two pure triisocyanates have been isolated from commercial sources and evaluated in gumstocks and propellants. Author
- Organic Chemistry
- Solid Rocket Propellants