Process for the production of polycarbonate
US6653434B2 · kind B2 · utility
24Cited by
11References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 19, 2001 |
| Grant date | Nov 25, 2003 |
| Priority date | — |
| Expiry date | Dec 19, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L41/0659
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A process for the production of polycarbonate by melt-polycondensing an aromatic dihydroxy compound and diphenylcarbonate, the process comprising adding the to polycarbonate under melt conditions a compound of the formula (1): wherein R1 and R3 may be the same or different and are selected from the group consisting of alkoxy, phenoxy, benzoxy, aryloxy, phenyl and aryl groups, R2 is selected from the group consisting of alkyl, phenyl, aryl, or aralkyl groups.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.