Process for the solid state polycondensation of polyester resins
US5708124A · kind A · utility
8Cited by
10References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 7, 1995 |
| Grant date | Jan 13, 1998 |
| Priority date | — |
| Expiry date | Dec 7, 2015 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G63/80
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Process for the solid state polycondensation of polyester resins, where an inert gas is circulating in a moving bed of polymer at a temperature between 180.degree. and 230.degree. C., characterized by the fact that the ratio by weight between the gas rate of flow per hour and that one of the discharged polymer is lower than 0.6.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.