Process for producing aromatic polyesters having increased degrees of polymerization
US4291152A · kind A · utility
16Cited by
7References
26Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 25, 1980 |
| Grant date | Sep 22, 1981 |
| Priority date | — |
| Expiry date | Mar 25, 2000 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G63/916
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A process for producing an aromatic polyester having an increased degree of polymerization. The process comprises reacting a hydroxyl-terminated, substantially linear, fiber-forming aromatic polyester having an aromatic dicarboxylic acid as a main acid component at an elevated temperature with a bi-cyclic imino ester compound of formula [I] or formula [II]. According to the process, the molecular chains of the aromatic polyester are bonded to each other by the terminal hydroxyl groups thereof to form rapidly the aromatic polyester having an increased degree of polymerization.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.