Processing and curing aid for composite propellants
US5942720A · kind A · utility
6Cited by
17References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 29, 1993 |
| Grant date | Aug 24, 1999 |
| Priority date | — |
| Expiry date | Apr 29, 2013 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC06B45/10
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The processing and cure of high solids (>85%) composite propellants at ambient temperature and pressure is accomplished by using a small amount (.ltoreq.0.1 weight percent) of a liquid dialkyl tin catalyst, such as dibutyltindiacetate and dibutyltindilaurate. The propellant binder system is composed of a branched, oxygen-containing polymer, such as polyethers, polypropylene oxide, polybutylene oxide, high homologues or mixtures thereof, and a sterically hindered diisocyanate curing agent. The liquid dialkyl tin catalyst unexpectedly serves as a wetting agent to lower the viscosity of the composite propellant formulation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.