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US 4,267,115 AGranted
Anthraquinone compounds
AssigneeSandoz Ltd.
InventorsWolfgang Frey, Wolfgang Schoenauer
Life of this patent
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Abstract
Water-soluble anthraquinone dyes which bear one or two 3,5,5-trimethylcyclohexylamino groups in the 1- and/or 4-positions and one or two -SO.sub.3 H groups bound either directly to a carbon atom of an aromatic ring or indirectly over an oxygen atom to a carbon atom of an aliphatic chain.
Claims3
A dye of the formula ##STR19## wherein p1 R.sub.2 is ##STR20## R.sub.5 is hydrogen, alkyl or alkoxy with 1 to 9 carbon atoms or halogen, --CH.sub.2 --CH.sub.2 --CH.sub.2 --, ##STR21## or ##STR22## --(O--CH.sub.2 --CH.sub.2).sub.p-- and m is 1 or 2.
Dependencies are inferred from the claim text.