Process for continuous synthesis of poly (ether-ester-amide) sequence copolycondensates
US4208493A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 28, 1978 |
| Grant date | Jun 17, 1980 |
| Priority date | — |
| Expiry date | Dec 28, 1998 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J10/02
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A process to synthesize poly (ether-ester-amide) sequence copolycondensates by the reaction in a molten condition between a dicarboxylic polyamide, in which the carboxylic functions are located at the chain-ends, and a polyoxyalkoylene with hydroxylated chain-ends, in the presence of a catalyst. This reaction is performed continuously in a thin-film reaction space through which the reaction mixture passes continuously under turbulent flow conditions. This process, which involves much shorter reaction times, produces sequence copolycondensates with better mechanical properties than corresponding substances obtained by batch processes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.