Patent · US Expired

Process for preparing acrylic filaments and fibers

US4507257A · kind A · utility

3Cited by

10References

8Claims

0Family size

Assignee

Hoechst GmbH · DE

Inventors

Walter Fester · Königstein, DE
Bernd Huber · Schorndorf, DE
Lieselotte Wappes · Frankfurt am Main, DE

Key dates

Filing date	Mar 7, 1983
Grant date	Mar 26, 1985
Priority date	—
Expiry date	Mar 7, 2003

Classification

Technology area (CPC D)Textiles; Paper
CPC primaryD06M11/13
WIPO fieldTextile and paper machines
WIPO sectorMechanical engineering

Abstract

The invention relates to a process for preparing wet- or dry-spun filaments and fibers of polymers which consist to more than 50% by weight of acrylonitrile units and which are continually treated with an aqueous solution containing copper(I) ions during the fiber production process but before a first heat treatment above 100.degree. C. and the copper content in the fibrous material is fixed by heating to above 60.degree. C., preferably to above 100.degree. C. The filaments and fibers thus obtained can be dyed with acid dyestuffs, have bactericidal properties, and can be subjected to accelerated pre-oxidation.

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