Direct disazo dyestuffs
AssigneeBayer Aktiengesellschaft
InventorsPeter Wild, Karin Hassenruck, Frank-Michael Stohr
Life of this patent
Estimating the term…
Abstract
Dyestuffs of the formula (I) ##STR1## wherein R.sup.1 and R.sup.4 independently of one another represent an acyl radical, R.sup.2 and R.sup.3 independently of one another represent hydrogen or unsubstituted or substituted C.sub.1 -C.sub.4 -alkyl, X represents a bridge member which is not fibre-reactive and n and m independently of one another represent 1 or 2, are outstandingly suitable for dyeing and printing substrates containing hydroxyl and/or amide groups, in particular for printing paper by the ink-jet method.
Claims11
Compound of the formula (I) ##STR76## wherein R.sup.1 and R.sup.4 independently of one another represent an acyl radical,
- R.sup.2 and R.sup.3 independently of one another represent hydrogen or unsubstituted or substituted C.sub.1 -C.sub.4 -alkyl,
- X represents a bridge member which is not fibre-reactive and
- n and m independently of one another represent 1 or 2.
Aqueous dyestuff preparation comprising 0.5 to 20% by weight of a dyestuff according to claim 1, 50 to 99.5% by weight of water, organic solvent or water and organic solvent.
Dependencies are inferred from the claim text.