Patent · US Expired

Process for the spin-dyeing of polymers or copolymers of acrylonitrile

US4020037A · kind A · utility

5Cited by

4References

2Claims

0Family size

Assignee

Hoechst GmbH · DE

Inventors

Manfred Hahnke · Kelkheim, DE
Theodor Papenfuhs · Frankfurt, DE
Wolfgang Teige · Kelkheim, DE

Key dates

Filing date	Nov 26, 1974
Grant date	Apr 26, 1977
Priority date	—
Expiry date	Nov 26, 1994

Classification

Technology area (CPC D)Textiles; Paper
CPC primaryD01F6/38
WIPO fieldTextile and paper machines
WIPO sectorMechanical engineering

Abstract

The novel improved process of the invention for spin-dyeing of acid-modified polymers or copolymers of acrylonitrile with basic dyestuffs wherein the spinning solutions of the polymers contain the basic dyestuffs in form of their free dyestuff bases as anhydro or carbinol bases is conducted with completely transparent spinning solutions avoiding clogging and mechanical abrasion of the spinning nozzles and yields filaments and fibers which do not show matting effects but have a high tinctorial strength and good and improved fastnesses to rubbing, to light and to wet-processing.

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