Process for producing aromatic polycarbonate
US6300459A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 21, 2000 |
| Grant date | Oct 9, 2001 |
| Priority date | — |
| Expiry date | Jan 21, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G64/42
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
An aromatic polycarbonate and an active-hydrogen compound are subjected to the transesterification reaction in the presence of a transesterification catalyst under a reduced pressure condition followed by reaction with a salicylic acid ester derivative expressed by the following chemical formula (1), ##STR1## {wherein X is methyl or ethyl, and Y is a carbonyl group or a divalent functional group expressed by the following formula (2), ##STR2## (where Z is an alkylene group having a carbon number of 1 to 30, an arylene group having a carbon number of 6 to 30 or an aralkylene group having a carbon number of 7 to 30)}. An aromatic polycarbonate having a high molecular weight can be produced by this process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.