Concentrated solutions of anionic dyestuffs
AssigneeBayer Aktiengesellschaft
InventorsGuenther Boehmke, Werner Theuer, Konrad Nonn, Georg Pape
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Abstract
Anionic dyestuffs which contain as the cation at least one cation of the formula ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3 denote alkyl with 1-6 C-atoms, cycloalkyl with 5-7 C-atoms or aralkyl with 7-12 C-atoms or represent a group ##STR2## wherein R.sub.4 and R.sub.5 denote hydrogen, methyl or ethyl and n represents the numbers 1-20 Are suitable for the preparation of storage-stable, water-miscible, concentrated solutions.
Claims2
Anionic dyestuffs which contain a carboxyl or sulfonic acid substituent and from 1 mole per dyestuff molecule to 1 mole equivalent per mole of the acid group in the dyestuff molecule of at least one cation of the formula ##EQU6## wherein R.sub.1, R.sub.2, and R.sub.3 denote alkyl with 1-6 carbon atoms, cycloalkyl with 5-7 carbon atoms, aralkyl with 7-12 carbon atoms, or the group;
- ##EQU7## wherein R.sub.4 and R.sub.5 denote hydrogen, methyl or ethyl and n is a number from 1 to 20.
Dependencies are inferred from the claim text.