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US 8,696,766 B2Granted
Azopyridone disperse dyes, their preparation and use
AssigneeDyStar Colours Deutschland GmbH
InventorStefan Neubauer
Life of this patent
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Abstract
A dye of the general formula (I) where D is the residue of a diazo component; X is (C1-C6)-alkylene or oxygen-interrupted (C2-C6)-alkylene; R1 is methyl, ethyl or phenyl; R2 is hydrogen, cyano or carboxamido; R3 is phenyl or substituted phenyl; R4 is hydrogen or methyl or R3 and R4 combine with the atoms to which they are attached to form a five- or six-membered ring. The invention further relates to the process of the preparation of the dye of formula and its use.
Claims10
A dye of the general formula (I)
- where
- D is the residue of a diazo component;
- X is (Ci-C6)-alkylene or oxygen-interrupted (C2-C6)-alkylene;
- R1 is methyl, ethyl or phenyl;
- R2 is hydrogen, cyano or carboxamido;
- R3 is phenyl or substituted phenyl;
- R4 is hydrogen or methyl or R3 and R4 combine with the atoms to which they are attached to form a five- or six- membered ring.
4 more elements
Dependencies are inferred from the claim text.