ENERGETIC BINDER PRODUCTION.
Abstract
Large scale batch preparations of polyepichlorohydrin (PECH) and dehydrochlorinated PECH (DEPECH) have been carried out. A two-stage continuous reactor system for difluoramination of DEPECH to produce PBEP has been constructed and operated at a rate of 0.25 pound per hour. Forty pounds of material have been produced and sent out to propellant contractors. A brief investigation of the process variables has been carried out and near optimum conditions have been determined for the continuous system. PBEP solutions have been treated with carbon to give virtually colorless polymer with improved thermal stability but at the cost of some loss of fluorine. PBEP in methylene chloride and ethylene chloride has been shown to be stable at -10 C and 50 C for periods of 8 months and 4 weeks, respectively. An interaction between water and PBEP has been demonstrated with glass as a necessary third component. TDI reactions with PBEP, glycerol and water have been studied, both catalyzed and uncatalyzed. The unusual behavior of the uncatalyzed PBEP/TDI reaction has been noted and its relationship to the presence of a possible catalyst destroying constituent in the PBEP examined. The deactivating effect of PBEP on the dibutyltin diacetate catalyst at low catalyst levels has been demonstrated. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1968
- Accession Number
- AD0390201
Entities
People
- E. E. Ryder Jr
- Laura Hunter