Process for the improvement of the homogeneity of highly reactive of highly reactive polycondensates

US4788017A · kind A · utility

Assignee

• Messer Griesheim GmbH · DE

Inventors

• Franz R. Schlomer · Dormagen, DE
• Wolfgang Volker · Tönisvorst, DE
• Hartwig Hupfer · Bargteheide, DE
• Karl-Erich Ott · Hamburg, DE
• Bodo Müller · Tornesch, DE

Key dates

• Filing date: Aug 27, 1987
• Grant date: Nov 29, 1988
• Expiry date: Aug 27, 2007

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B29C2035/165
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

The homogeneity of highly reactive polycondensates is improved in a process involving batch operations in a reactor, followed by extrusion and then cooling by a coolant to the point of solidification after which the polycondensates are milled and removed. The cooling is carried out with a low-boiling liquified gas.