Accession Number:

AD0882728

Title:

Synthesis and Evaluation of Curing Agents.

Descriptive Note:

Final technical rept. 4 Mar 68-2 Sep 70,

Corporate Author:

ESSO RESEARCH AND ENGINEERING CO LINDEN N J GOVERNMENT RESEARCH LAB

Report Date:

1970-12-01

Pagination or Media Count:

225.0

Abstract:

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

Subject Categories:

  • Organic Chemistry
  • Solid Rocket Propellants

Distribution Statement:

APPROVED FOR PUBLIC RELEASE