Blocked amine terminated polycarbonates and products obtained therefrom
US5068284A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 3, 1990 |
| Grant date | Nov 26, 1991 |
| Priority date | — |
| Expiry date | Aug 3, 2010 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G81/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Blocked amine terminated polycarbonate is provided which can be used to form anhydride terminated polycarbonates, or copolymers with various functionalized organic polymers. A blocked amino phenol, such as N-t-butoxycarbonyl tyramine can be used as a chain stopper under interfacial conditions to chain stop polycarbonate. The t-butoxycarbonyl can be removed by melt processing the polycarbonate to yield an amine end group which can be reacted with other polymers or with an organic dianhydride to form anhydride terminated polycarbonate. The anhydride terminated polycarbonates can be used to form copolymers with amine terminated polyamides.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.