Crosslinkable polycyclic polycarbonate oligomer and methods for their preparation and use
US4888411A · kind A · utility
33Cited by
1References
7Claims
0Family size
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Key dates
| Filing date | Jun 20, 1988 |
| Grant date | Dec 19, 1989 |
| Priority date | — |
| Expiry date | Jun 20, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G64/28
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Polycyclic polycarbonate (or thiol analog) oligomers are prepared from a mixture of at least one bishaloformate with at least one tetraphenol, or thio analogs thereof. Such mixture may also contain at least one dihydroxy or dimercapto compound. The oligomers are formed by the reaction of such mixtures with alkali metal hydroxides and various amines. The polycyclic oligomer mixtures may be converted to crosslinked polycarbonates or their thiol analogs.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.