Process for producing biopolymer nanoparticles
US9011741B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 14, 2012 |
| Grant date | Apr 21, 2015 |
| Priority date | — |
| Expiry date | Sep 14, 2032 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K5/0025
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
In a process for producing a biopolymer nanoparticles, biopolymer feedstock and a plasticizer are fed to a feed zone of an extruder and the biopolymer feedstock is processed using shear forces. A crosslinking agent is added to the extruder downstream of the feed zone. The process has a production rate of at least 1.0 metric tons per hour. The feedstock and the plasticizer are preferably added separately to the feed zone. The extruder may have single flight elements in the feed zone. The temperatures in the intermediate section of the extruder are preferably kept above 100 C. The screw configuration may include two or more steam seal sections. Shear forces in a first section of the extruder may be greater than shear forces in an adjacent downstream section of the first section. In a post reaction section, water may be added to improve die performance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.