Continuous dynamic and efficient devolatilization method for polymer/volatile system based on high mass transfer interfaces
US12421329B1 · kind B1 · utility
Assignees
Inventors
Key dates
| Filing date | Apr 2, 2025 |
| Grant date | Sep 23, 2025 |
| Priority date | — |
| Expiry date | Apr 2, 2045 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2323/00
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The present application discloses a continuous dynamic and efficient devolatilization method for a polymer/volatile system based on high mass transfer interfaces, including the following steps: providing a dynamic single-screw devolatilizer, feeding a polymer solution to the devolatilizer, wherein the polymer solution includes polymer and volatile substances with small molecule weight, and the volatile substances include organic solvents, residual monomers, water or reaction by-products; conveying and compressing polymer materials by the screw downstream a devolatilization section, and extruding the polymer materials out of the dynamic single-screw devolatilizer directly; or providing a side-feeding extruder downstream of the devolatilization section and feeding plastic additives into a devolatilized polymer melt, and then melt blending the plastic additives with the devolatilized polymer melt at an end of the dynamic single-screw devolatilizer before exiting the dynamic single-screw devolatilizer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.