Patent · US Expired

Mixtures of azo dyes for navy to black hues

US5431699A · kind A · utility

2Cited by

4References

6Claims

0Family size

Assignee

BASF SE

Inventors

Arno Lange · Bad Dürkheim, DE
Uwe Nahr · Schifferstadt, DE
Walter P. Sieber · Elmira, CA
Volker Walther · Bad Dürkheim, DE

Key dates

Filing date	Jan 28, 1994
Grant date	Jul 11, 1995
Priority date	—
Expiry date	Jan 28, 2014

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S8/922
WIPO fieldBasic materials chemistry
WIPO sectorChemistry

Abstract

Dye mixtures contain PA1 a) one or more azo dyes of the formula I ##STR1## where Y.sup.1 is hydrogen, C.sub.1 -C.sub.6 -alkyl, C.sub.1 -C.sub.4 -alkoxy or unsubstituted or substituted C.sub.1 -C.sub.8 -alkanoylamino or C.sub.3 - or C.sub.4 -alkenylamino or PA2 Y.sup.2 and Y.sup.3 are each hydrogen or unsubstituted or substituted C.sub.1 -C.sub.6 -alkyl PA1 b) the azo dye of the formula II ##STR2## where L is allyl which may be partially replaced by or may furthermore be hydrogen and PA1 c) optionally, an azo dye of the formula III and/or IV as described in the specification.

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