Preparation of polyester carbonates from polyanhydride ester intermediates
US4130548A · kind A · utility
17Cited by
3References
16Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 21, 1977 |
| Grant date | Dec 19, 1978 |
| Priority date | — |
| Expiry date | Oct 21, 1997 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G63/64
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A novel process is disclosed for the preparation of polyester carbonates containing both carboxylate and carbonate groups. The process is based on the making of a mixed polyanhydride ester of a dibasic acid which is reacted with a dihydroxy compound to form a hydroxy containing intermediate that is subsequently transformed into a polyester carbonate by means of a carbonate forming reagent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.