Azo dyestuffs
AssigneeBayer Aktiengesellschaft
InventorsHans-Joachim Vater, Horst Nickel, Hermann Henk
Life of this patent
Estimating the term…
Abstract
Azo dyestuffs of the formula ##STR1## wherein A, R.sub.1, m and n have the meaning given in the description. The dyestuffs are suitable for dyeing cellulose-containing materials, especially cotton, which may be natural or regenerated, as well as union fabrics containing cotton, and paper. The dyestuffs in general give red to violet, as well as reddish brown, color shades. The dyestuffs are distinguished by good light-fastness, substantivity and wet-fastness. Their great suitability for high temperature dyeing processes and for subsequent creaseproof finishing deserves particular mention.
Claims7
Azo dyestuffs of the formula ##STR23## wherein A is the radical of a non-copper-containing monoazo or disazo dyestuff of the naphthalene-azo-benzene, naphthalene-azo benzene-azo-benzene, benzene-azo-benzene, benzene-azo-benzene-azo-benzene, benzene-azo-benzene-azo-naphthalene, benzene-azo-naphthalene, benzene-azo-naphthalene-azo-benzene, benzene-azo-naphthalene-azo-naphthalene or naphthalene-azo-naphthalene series,
- R.sup.1 is amino, methylamino, dimethylamino, ethylamino, diethylamino, 2-hydroxyethylamino, bix-(2-hydroxyethyl)-amino, alkylamino, dialkylamino, methoxyethylamino, sulphatomethylamino, carboxymethylamino, N-methyl-N-carboxymethylamino, carboxyethylamino, N-methyl-N-sulphatomethylamino, sulphatoethylamino, N-methyl-N-sulphatoethylamino, cyclohexylamino, pyrrolidino, piperidino, 1-methylpiperazino, morpholino, 4-morpholineamino, benzylamino or said phenylamino or naphthylamino being unsubstituted or substituted by hydroxyl, halogen, alkoxy, carboxyl or sulpho, m is 0 or 1 and n is 1 or 2.
Azo dyestuffs of the formula ##STR25## wherein A.sub.1, A.sub.2 and A.sub.3 have the meaning given in claim 5 and
- R.sub.1 represents a substituent which is not fibre-reactive.
Dependencies are inferred from the claim text.