ADVANCED PROPELLANT SYNTHESIS.
Abstract
A process for the preparation of an inert terpolymer of allyl acrylate -acrylic acid - methyl acrylate, which on addition of tetrafluorohydrazine produces a polymer equivalent to NFPA prepolymer, has been developed. Thus, the handling of the hazardous intermediates in the production of NFPA prepolymer can be avoided. The continuous-process reactor for the preparation of the geminal bis(difluoramino) adduct of trifluoroacetoxy acetone, the precursor of geminal NFPA, has been modified. The new reactor provided yields of 88% of the desired geminal bis(difluoramine). A successful synthesis of all geminal bis(difloramine) plasticizers with an NF content of 60% has been worked out. A polyhydroxy compound, (ethylene glycol, glycerol, or pentaerythritol) is converted to the poly-propargyl ether. Hydrolysis of the acetylene functions provides a poly-ketone that can be difluoraminated smoothly with difluoramine-sulfuric acid. The synthesis of a nylon-6 type monomer, 5,5-bis (difluoramino)-2-azacycloheptanone, has been completed. Degradation studies on related caprolactams are also reported.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 03, 1967
- Accession Number
- AD0377976
Entities
People
- C. B. Colburn
- C. P. Haney
- J. E. Engle
- W. E. Hill
- W. H. Graham