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US 6,281,361 B1Granted
Dibenzonaphthyrones
AssigneeCiba Specialty Chemicals Corporation
InventorsPeter Nesvadba, Joachim Jandke
Life of this patent
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Abstract
Dibenzonaphthyrone of formula (I) wherein A1 and A2 independently of each other are unsubstituted or mono- to tetra-substituted o-C6-C18arylene, with the proviso that formula (I) does not represent a dibenzonaphthyrone of the formula The invention further relates to processes for the preparation thereof, to the use thereof for colouring/pigmenting high-molecular-weight organic material and to substance compositions comprising dibenzonaphthyrones.
Claims3
A dibenzonaphthyrone of formula (I)
- wherein A1 and A2 are each independently of the other unsubstituted or mono- to tetra-substituted o-C6-C18arylene, with the proviso that formula (I) does not represent a dibenzonaphthyrone of the formula
Dependencies are inferred from the claim text.