Energetic copolymers and method of making same
US4483978A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 18, 1982 |
| Grant date | Nov 20, 1984 |
| Priority date | — |
| Expiry date | May 18, 2002 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G65/2669
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Energetic copolymers having repeating mer units derived from different monomers, one or both of which have pendant energetic groups such as azido, nitro or nitrato groups. Copolymers have improved formulating characteristics compared to homopolymers of the energetic monomers; e.g., they are less crystalline or less viscous. Preferably the monomers are cyclic oxides having three to six atoms in the ring. The energetic monomers are preferably azido, nitro or nitrato derivatives of oxetane or THF. Copolymerization is preferably carried out by cationic polymerization using an adduct of the preinitiator precursor (e.g., 1,4-butane diol) and a catalyst suitable for cationic polymerization (e.g., boron trifluoride etherate) which is employed in stoichiometric proportion to the monomers and a low molecular weight, low polydispersity copolymer results. Certain novel monomers also are provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.