Red monoazo sulphonic acid dyestuffs for polyamide
AssigneeCiba-Geigy Corporation
InventorsPaul Lienhard, Fabio Beffa
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Abstract
Red monoazo dyestuffs frm diazotised 1-aminobenzene-2-sulphonic acid-N-methyl-N-cyclohexylamide or 1-amino-4-,-5- or -6-methyl-benzene-2-sulphonic acid-N-methyl-N-cyclohexylamide and 2-amino-8-hydroxynaphthalene-6-sulphonic acid are disclosed which are particularly distinguished by their good migration and levelling properties and excellent fastness to light. Said dyestuffs are moreover suitable for obtaining very even combination dyeings together with known blue or yellow acid dyestuffs. These dyestuffs are particularly suited for the dyeing of carpeting, upholstery fabrics and drapery materials.
Claims2
A process for the dyeing or printing of an organic fiber material selected from the group consisting of a basic modified polyolefin fiber material, polyurethane fiber material and natural or synthetic polyamide fiber material which comprises employing a monoazo dyestuff of the formula:
- ##STR6## wherein X.sub.1 represents hydrogen or the methyl group, and
- M.sup..sym. represents a colorless cation.
Dependencies are inferred from the claim text.