Method for making polycarbonates
US5519105A · kind A · utility
5Cited by
9References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 10, 1994 |
| Grant date | May 21, 1996 |
| Priority date | — |
| Expiry date | May 10, 2014 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G64/24
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A composition and method is provided for making polycarbonate utilizing an effective amount of a binary catalyst system, comprising a phase transfer catalyst and a tertiary organic amine, as a condensation catalyst during the interfacial phosgenation of a bisphenol, such as bisphenol A. for improved phosgene utilization.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.