Heterocyclic diazo dyestuffs

Abstract

Abstract DISAZO DYESTUFFS IN WHICH TWO MONOAZO DYESTUFF MOLECULES OF THE GENERAL FORMULA D-N=N-A-N(-R1)-R2 IN WHICH D REPRESENTS THE RESIDUE OF A MONOCYCLIC OR BICYCLIC DIAZO COMPONENT, A REPRESENTS A PARA-PHENYLENE RESIDUE AND R1 AND R2 EACH REPRESENTS AN ALKYL RESIDUE THAT MAY BE SUBSTITUTED, ARE LINKED TOGETHER THROUGH THE RESIDUES OF THEIR COUPLING COMPONENTS BY A BIFUNCTIONAL BRIDGING COMPONENT Z WHICH HAS NO DYESTUFF CHARACTERISTICS, AND IS ONE OF THE FOLLOWING FORMULAE: -S-, -S-S-, -NH-, -N(-CH3)-, -SO-, -SO2-, -CO- AND ESPECIALLY A GROUP OF THE FORMULA-X''-R5-X''-, IN WHICH X'' REPRESENTS AN OXYGEN ATOM, A SULPHUR ATOM OR AN -NH-GROUP, THE HYDROGEN ATOM OF WHICH MAY BE SUBSTITUTED BY AN ALKYL GROUP HAVING UP TO 4 CARBON ATOMS, ESPECIALLY A METHYL GROUP, AND R5 REPRESENTS A BIFUNCTIONAL ALIPHATIC, CYCLOALIPHATIC, ARALIPHATIC, AROMATIC OR HETEROCYCLIC RESIDUE, THE CARBON CHAIN OF WHICH MAY BE INTERRUPTED BY HETERO ATOMS, ESPECIALLY OXYGEN ATOMS, AND WHICH, WHEN THE TWO DIAZO COMPONENTS ARE HETEROCYCLIC RING SYSTEMS AND/OR X'' IS AN OXYGEN ATOM, IS PREFERABLY NOT A POLYMETHYLENE CHAIN AND IN WHICH BOTH OF THE MONOAZO DYESTUFF RESIDUES ARE JOINED TO THE BIFUNCTIONAL RESIDUE Z DIRECTLY VIA THE AROMATIC NUCLEUS A. THE DYESTUFFS ARE USED TO DYE SYNTHETIC FIBERS SUCH AS POLYESTER FIBERS. THE DYEINGS SO OBTAINED ARE VERY FAST TO LIGHT AND TO SUBLIMATION.

Inventors

• 👤 H Angliker
• 👤 R Peter

Bibliographic Details