Process for the production of polyester copolymers
US4435562A · kind A · utility
11Cited by
6References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 6, 1983 |
| Grant date | Mar 6, 1984 |
| Priority date | — |
| Expiry date | May 6, 2003 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G63/78
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The invention is a process for esterifying organic dicarboxylic acid and diol at elevated temperatures and thereafter transesterifying the esterification product in the presence of a diol and a diester at elevated temperatures thereafter polymerizing the transesterification product in a condensation stage to form a polycondensed copolyester having an intrinsic viscosity from 0.2 to 0.9.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.