Cationically bridged tetrakisazo dyestuffs with variable couplers, their production and use
AssigneeSandoz Ltd.
InventorHelmut A. Moser
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Abstract
The invention relates to cationically bridged tetrakisazo compounds, corresponding to formula I, ##STR1## wherein the individual symbols are defined as in claim 1, as well as residues and liquid preparations thereof. The compounds and their preparations are used for dyeing and printing hydroxy-group-containing or nitrogen-containing organic substrates by a known method. Preferred substrates are textile materials which consist of or contain cellulose, especially cotton, or also bast fibres, leather and preferably paper or paper pulp products, especially wood-containing paper.
Claims12
A compound of formula I ##STR47## wherein K.sub.1 is any coupling component, B is any bridging member,
- K.sub.2 is a cationic pyridone coupler or a pyridone coupler which carries a tertiary amino group,
- A.sup.- is an anion and
- D is a divalent group which is a hydroxyalkylene, alkylene or xylylene;
- whereby each chromophore must contain at least two water-solubilizing groups and coupling must be asymmetrical.
Dependencies are inferred from the claim text.