Patent · US Active

Method for producing highly condensed solid-phase polyesters

US7977448B2 · kind B2 · utility

0Cited by

31References

20Claims

0Family size

Assignee

Lurgi Zimmer GmbH · DE

Inventors

Brigitta Otto · Lenzen (Elbe), DE
Hans Reitz · Rosbach, DE
Holger Bachmann · Weiterstadt, DE
Klaus Kirsten · Mainz, DE

Key dates

Filing date	Feb 25, 2005
Grant date	Jul 12, 2011
Priority date	—
Expiry date	Sep 25, 2026

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/31786
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

The invention relates to a continuous or discontinuous method for the production of highly condensed polyesters in the solid state, comprising a crystallization of a polyester material, wherein the crystallization is carried out in the presence of a gas with a dew point of (less than or equal to) ≦approximately −10° C. The invention also relates to a method for the production of polyester formed bodies using the polyester material obtained for the production of bottles, films and high strength threads.

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