Yellow disperse dye mixture which has a high level of light fastness
View Patent ↗The present inventions refers to a dye mixture comprising from 25 to 80% by weight with respect to the total dyestuff fraction of the yellow dyestuff represented by the structural formula [1] and from 75 to 20% by weight with respect to the total dyestuff fraction of a yellow dyestuff represented by the structural formula [2] wherein R denotes a C 1 to C 4 hydroxyalkyl group.
1. Dye mixture comprising from 25 to 80% by weight with respect to the total dyestuff fraction of the yellow dyestuff represented by the structural formula [1]
and from 75 to 20% by weight with respect to the total dyestuff fraction of a yellow dyestuff represented by the structure formula [2]
wherein R denotes a C 1 to C 4 hydroxyalkyl group.
2. Dye mixture according to claim 1 which contains from 50 to 70% by weight of the yellow dyestuff represented by the structural formula [1] and from 50 to 30% by weight of the yellow dyestuff represented by the structural formula [2].
3. Dye mixture according to claim 1 which further contains up to 15% by weight with respect to the total dyestuff fraction of the yellow dyestuff of the formula [3]
4. A method for dyeing polyester-based fibers in which a dyestuff mixture of claim 1 is used.
5. Dye mixture according to claim 2 which further contains up to 15% by weight with respect to the total dyestuff fraction of the yellow dyestuff of the formula [3]
6. Dye mixture according to claim 3 wherein the yellow dyestuff of the formula [3] is present in an amount from 5 to 15% by weight with respect to the total dyestuff.
7. Dye mixture according to claim 5 wherein the yellow dyestuff of the formula [3] is present in an amount from 5 to 15% by weight with respect to the total dyestuff.