Method of separating a polymer from a solvent
US6949622B2 · kind B2 · utility
23Cited by
36References
31Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 26, 2003 |
| Grant date | Sep 27, 2005 |
| Priority date | — |
| Expiry date | Aug 26, 2023 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C48/03
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A method of separating a polymer-solvent mixture is described wherein a polymer-solvent mixture is heated prior to its introduction into an extruder comprising an upstream vent and/or a side feeder vent to allow flash evaporation of the solvent, and downstream vents for removal of remaining solvent. The one-step method is highly efficient having very high throughput rates while at the same time providing a polymer product containing low levels of residual solvent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.