Patent · US Expired

Dyestuff mixtures

US5295999A · kind A · utility

4Cited by

4References

9Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Rolf Hinrichs · Hamburg, DE
Peter Wild · Odenthal, DE

Key dates

Filing date	Jan 21, 1993
Grant date	Mar 22, 1994
Priority date	—
Expiry date	Jan 21, 2013

Classification

Technology area (CPC D)Textiles; Paper
CPC primaryD21H21/28
WIPO fieldBasic materials chemistry
WIPO sectorChemistry

Abstract

The dyestuff mixtures comprising the dyestuff of the formula (I) ##STR1## and a dyestuff of the formula ##STR2## wherein R.sub.1 and R.sub.2 independently of one another represent alkyl, cycloalkyl or aryl, and/or tautomeric forms of the dyestuffs of the formulae (I) and/or (II), are particularly suitable for the preparation of concentrated, storage-stable dyestuff solutions which, apart from a small amount of alkanolamines, comprise no further water-soluble organic solubilising agents.

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