Method for manufacturing polycarbonate
US6455667B1 · kind B1 · utility
16Cited by
0References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 6, 1999 |
| Grant date | Sep 24, 2002 |
| Priority date | — |
| Expiry date | Dec 6, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G64/307
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention provides a method for manufacturing polycarbonate with excellent dwell stability (e.g., thermal stability and hue stability) during melting and molding, as well as with a low content of impurities. The present invention further relates to a method for manufacturing polycarbonate wherein the molten polycarbonate is filtered through a passivation treated metal filter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.