Photoflash Compositions Desensitized by Coatants
Abstract
A process for blending photoflash powder was investigated in which the powder was coated with material for the purpose of decreasing the hazard. Various coatant candidates were applied by both coacervation and contact methods, and the resulting formulations characterized with respect to physico- chemical, sensitivity, stability, and performance properties. The method finally selected was contact coating from a wet medium employing an electrically conducting carbon black as coatant. During the program there was a scale-up from laboratory bench quantities to a 5 kg batch. For the larger batches a counter current mix muller was employed. The method is safer than the non-proprietary standard methods previously used, since the material is wet or damp throughout the blending process. Furthermore, the coating, by its ability to leak off voltage, reduces the electrostatic hazards during the blending and further processing of the powder. The product obtained is stable and equals the performance of the uncoated formulations.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1980
- Accession Number
- ADA094754
Entities
People
- B. Werbel
- F. R. Taylor
- S. Dallman
Organizations
- United States Army Armament Research, Development and Engineering Center