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US 3,956,270 AGranted
.beta.-Modified azo dye
AssigneeBASF SE
InventorsLeonhard von Rambach, Ewald Daubach, Bertold Honigmann
Life of this patent
Estimating the term…
Abstract
A new .beta.-modification of the dye of the formula: ##SPC1## Which is eminently suitable for dyeing polyesters in particular and which is surprisingly more stable under dyeing conditions than the modification already known.
Claims1
The dye of the formula:
- ##SPC3##
- which has the X-ray diffraction graph which exhibits the following principal lines:
- angle 10.99 11.72 14.00 14.79 25.35 26.25 26.50 2 H in- 44 98 60 35 42 100 43. ten- sity in %::
Dependencies are inferred from the claim text.