Back to results
US 9,546,279 B2Granted
Anthraquinone azo dyes
AssigneeHuntsman International LLC
InventorsRalf Petermann, Urs Lauk, Kevin Murer, Yvonne Pesek
Life of this patent
Estimating the term…
Abstract
Provided are anthraquinone azo dyes and dye mixtures which are distinguished by a very good build-up capacity and which also yield tinctorially strong dyeings or prints in a golden-yellow to orange shade having all around good properties, especially high temperature light fastness properties.
Claims3
An azo dye of the formula
- wherein R1 is hydrogen,
- R2 is hydroxy,
- R3 is hydrogen,
- R4 is hydrogen, and
- D represents a radical of the formula
- wherein R5 denotes C4H9 .
3 more elements
Dependencies are inferred from the claim text.