Robust process for the synthesis of polyestercarbonates
US6307005A · kind A · utility
8Cited by
5References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 29, 1999 |
| Grant date | Oct 23, 2001 |
| Priority date | — |
| Expiry date | Oct 29, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G63/79
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention related to a method for preparing a polyestercarbonate, the method comprising: PA1 a) reacting a dihydric phenol and a diacid having from 12 to about 30 carbon atoms in the presence of an effective amount of carbonate precursor, thereby forming a reaction mixture, wherein the pH of the reaction mixture is maintained in an initial pH range of from about 8.5 to about 9.5 for about 50% to about 95% of the total carbonate precursor addition, and a second pH range of from about 10 to about 12 for the remainder of the carbonate precursor addition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.