On-line properties analysis of a molten polymer by raman spectroscopy for control of a mixing device
US7483129B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 22, 2005 |
| Grant date | Jan 27, 2009 |
| Priority date | — |
| Expiry date | Jul 13, 2026 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F2400/02
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Method and systems for online analysis of a polymeric material within a mixing device are provided. In certain embodiments, the methods and systems subject the polymeric material to Raman spectroscopy analysis. The Raman spectroscopy provides analysis of polymer properties that may include melt index, density, viscosity, molecular weight, molecular weight distribution, weight ratios of different polymers comprising the polymeric material, additive concentrations, crosslinking agent concentrations, scissoring agent concentrations, and combinations thereof. The spectroscopy results can be used to provide process control to adjust operating parameters of the mixing device and/or an associated polymerization process. The mixing device may be an extruder. The methods and systems may also include a processor for evaluating the results of the Raman analysis and automatically adjusting the mixing device and/or polymerization processes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.