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US 6,150,509 AGranted
Water-insoluble yellow monoazo pigment
AssigneeDominion Colour Corporation
InventorsAlan Gray, Henry Lui, Dorothy-Grace Manarang
Life of this patent
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Abstract
A water-insoluble yellow monoazo pigment has the following formula (I): ##STR1##
Claims5
A water-insoluble yellow monoazo pigment having the following formula (I):
- ##STR3##
A process for preparing a water-insoluble pigment of the following formula (I):
- the process comprising diazotizing p-aminobenzamide to produce a diazonium compound, and
- coupling the diazonium compound with 5-acetoacetylaminobenzimidazolone.
Dependencies are inferred from the claim text.