Process for preparation of copolyester
US4767830A · kind A · utility
10Cited by
4References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 22, 1987 |
| Grant date | Aug 30, 1988 |
| Priority date | — |
| Expiry date | Sep 22, 2007 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G63/60
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The invention process comprises reacting a polyester with a hydroxy-aromatic carboxylic ester to effect the transesterification and then further polymerizing the product. The process is conducted so that the obtained product has a high molecular weight and does not contain impurities, without corrosion of a used reactor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.