Polyester process
US6127080A · kind A · utility
9Cited by
13References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 10, 2000 |
| Grant date | Oct 3, 2000 |
| Priority date | — |
| Expiry date | Mar 10, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G63/83
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A process for the preparation of an unsaturated polyester which comprises (i) reacting an organic diol with a cyclic akylene carbonate in the presence of a first catalyst to thereby form a polyalkoxy diol, and (ii) optionally adding thereto a further amount of cyclic alkylene carbonate in the presence of a second catalyst, and (iii) subsequently polycondensing the resulting mixture with a dicarboxylic acid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.