Hydroxy terminated polybutadiene based polyurethane bound propellant grains
US4098626A · kind A · utility
148Cited by
1References
2Claims
0Family size
Assignee
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Key dates
| Filing date | Nov 15, 1976 |
| Grant date | Jul 4, 1978 |
| Priority date | — |
| Expiry date | Nov 15, 1996 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G18/69
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Salicylate esters have been found to be suitable blocking agents for polyisocyanates, enabling preparation of hydroxy terminated polybutadiene based polyurethane bound propellant grains having extended pot life. Unblocking occurs readily at normal propellant cure temperatures, allowing normal cure rates.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.