Patent · US Expired

Method for evaporating polymer solutions of thermoplastic polymers

US6534619B1 · kind B1 · utility

8Cited by

5References

9Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Thomas Elsner · Düsseldorf, DE
Jürgen Heuser · Krefeld, DE
Klemens Kohlgrüber · Lingen (Ems), DE
Christian Kords · Krefeld, DE

Key dates

Filing date	Feb 5, 2001
Grant date	Mar 18, 2003
Priority date	—
Expiry date	Feb 5, 2021

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08G64/406
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

This invention relates to a multistep process for evaporating polymer solutions of thermoplastic polymers and for removing volatile constituents from thermoplastic polymers by indirect heat exchange. The invention relates in particular to a process for evaporating volatile constituents out of polymer solutions using shell-and-tube heat exchangers having a special geometry, coiled-tube evaporators and extrusion evaporators.

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