Method for the devolatilization of thermoplastic materials
US4952672A · kind A · utility
14Cited by
11References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 11, 1988 |
| Grant date | Aug 28, 1990 |
| Priority date | — |
| Expiry date | Aug 11, 2008 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J2208/00548
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
This invention is a method and an apparatus for rapidly devolatilizing a product of a polymerization process containing at least one volatile material. The product is initially devolatilized in a high temperature zone, and the foamed devolatilized product is separated into a gas and a liquid polymer phase and rapidly removed therefrom to minimize depolymerization and degradation of the polymer. The partially devolatilized product is further devolatilized by feeding it into a rotatable chamber which is rotated at a sufficient angular velocity to create a high gravitational field to form a vapor and a polymer liquid pool.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.