Polyestercarbonates and methods for the direct incorporation of acids into polycarbonate chains by SSP
US6365702B1 · kind B1 · utility
3Cited by
5References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 31, 2001 |
| Grant date | Apr 2, 2002 |
| Priority date | — |
| Expiry date | May 31, 2021 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G63/80
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A method for preparing a polyestercarbonate copolymer using solid state polymerization and polyestercarbonates prepared thereby is described. The method comprises preparing a mixture comprising partially crystalline bisphenol A polycarbonate oligomer and hydroxy acids, aliphatic diacids, cycloaliphatic diacids, aromatic diacids or aromatic triacids and subjecting that mixture to solid state polymerization to afford a polyestercarbonate copolymer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.