Monoazo reactive dyes and solutions thereof
AssigneeZeneca Limited
InventorsBrian Lamble, Aiden Lavery, John A. Taylor
Life of this patent
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Abstract
A high strength aqueous solution comprising a first and second dye each of which, in the free acid form, is of Formula (1): ##STR1## wherein: R.sup.1 is NH.sub.2 or alkyl; W is H, alkyl or alkoxy; X is a labile atom or group; A is ##STR2## Y is H or alkyl; Z is an optionally substituted phenyl group; and n has a value of 1 to 3; provided that (i) the groups defined by A in the first and second dye are different to one another; and (ii) the solution contains less than 5% by weight of inorganic compounds. Also claimed are compositions and dyes of Formula (1).
Claims16
A high strength aqueous solution comprising a first and second dye each of which, in the free acid form, is of Formula (1):
- ##STR10## wherein:
- R.sup.1 is NH.sub.2 or alkyl;
- W is H, alkyl or alkoxy;
- X is a halogen atom or a quaternary ammonium group;
- A is ##STR11## Y is H or alkyl;
- Z is phenyl group having one ortho halo or alkyl substituent, a sulpho substituent, or both an ortho halo or alkyl substituent and a sulpho substituent;
- and
- n has a value of 1 to 3;
- provided that
- (i) the groups defined by A in the first and second dye are different to one another;
- and
- (ii) the solution contains less than 5% by weight of inorganic compounds.
Dependencies are inferred from the claim text.