Patent · US Expired

Process for dyeing evenly synthetic fibrous materials

US4252532A · kind A · utility

2Cited by

12References

12Claims

0Family size

Assignee

Hoechst GmbH · DE

Inventors

Friedrich Engelhardt · Frankfurt, DE
Karl Hintermeier · Frankfurt am Main, DE
Joachim Ribka · Offenbach am Main, DE
Ralf Zimmermann · Bensberg, DE

Key dates

Filing date	Nov 18, 1977
Grant date	Feb 24, 1981
Priority date	—
Expiry date	Nov 18, 1997

Classification

Technology area (CPC D)Textiles; Paper
CPC primaryD06P3/54
WIPO fieldTextile and paper machines
WIPO sectorMechanical engineering

Abstract

Process for dyeing evenly synthetic fiber materials and mixtures thereof with natural fibers, with water-insoluble disperse dyestuffs according to the exhaust method, which comprises adding water-soluble or dispersible linear polyesters that have been obtained by polycondensation of dicarboxylic acids with diols, including sulfo-groups-containing chain links, with an average molecular weight of 800 to 5,000, combined with surface-active oxethylation products, at a blend ratio of 1:0.25 to 1:1.5, as dispersing system with levelling action to the aqueous dyeliquors, besides said dyestuffs and pH-controlling substances.

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