Dibenzo crown monomers and polymers formed therefrom
US5302729A · kind A · utility
6Cited by
2References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 16, 1991 |
| Grant date | Apr 12, 1994 |
| Priority date | — |
| Expiry date | Apr 16, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G71/02
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Novel bis(extraannular functionally-substituted phenylene) crown compounds, useful as chelating agents or in the synthesis of condensation polymers containing large semi-rigid macrocycles in the polymer backbone, are described. A broad range of functional groups (preferably in the 5-position) can be used in the 1,3-phenylene varieties. Carboxy functional groups are used in certain novel 1,2-phenylene crowns.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.