Method of making multi-base propellants from pelletized nitrocellulose
US6692655B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 9, 2001 |
| Grant date | Feb 17, 2004 |
| Priority date | — |
| Expiry date | Jul 22, 2021 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC06B45/22
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
In this method for making multi-base propellants, pelletized nitrocellulose is coated with an electrostatically insensitive liquid elastomer precursor or non-plasticizer while wetted in a non-solvent diluent, preferably in the absence of plasticizers. The non-solvent diluent is then substantially, if not completely, removed from the coated nitrocellulose. Then, the coated pelletized nitrocellulose is mixed with a plasticizer and optionally other ingredients and fillers, including energetic fuels such as nitroguanidine. The propellant formulation is then cast, and optionally cured with an acceptable curative, such as a diisocyanate or polyisocyanate. The resulting material may be visually (i.e., to the naked eye) homogeneous. Also, the coated nitrocellulose pellets present during processing have reduced sensitivity to electrostatic discharge.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.