Patent · US Active

Degassing extruder for degassing a polymer material and method for degassing a syrup consisting of polymers, solvents and/or monomers using a degassing extruder

US8585275B2 · kind B2 · utility

0Cited by

9References

27Claims

0Family size

Assignee

Evonik Röhm GmbH · DE

Inventors

Ruediger Carloff · Darmstadt, DE
Joachim Heid · Reichelsheim, DE
Heinz Vetter · Weiterstadt, DE

Key dates

Filing date	Aug 12, 2008
Grant date	Nov 19, 2013
Priority date	—
Expiry date	Sep 28, 2029

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB29C48/767
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

The invention relates to a vented extruder (1) for the devolatilization of a polymer material, encompassing at least one extruder barrel (2) with at least one rotatably driven extruder screw (3) mounted in the extruder barrel (2), and with at least one material feed and with at least one extrudate outlet, and also with at least one vent zone (9). A particular feature of the vented extruder (1) is that the gas output for the gas arising in the vent zone (9) has been provided upstream of the material feed, in relation to the direction of conveying of the polymer material.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.