Apparatus and process for devolatilization of high viscosity polymers
US4954303A · kind A · utility
11Cited by
14References
40Claims
0Family size
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Key dates
| Filing date | Feb 10, 1989 |
| Grant date | Sep 4, 1990 |
| Priority date | — |
| Expiry date | Feb 10, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S425/812
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A devolatilizer, especially suitable for high viscosity polymers, comprising a vacuum chamber into the top of which the polymer is introduced after having passed through a tubular or equivalent heat exchanger, with a low shear mixer located in the vacuum chamber and a pumping device for removing the devolatilized polymer from the bottom of the vacuum chamber. Devolatilization of high viscosity polymers is achieved in this apparatus and method without severe degradation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.