Alternative phthalocyanine dyes suitable for use in offset inks
AssigneeSilverbrook Research Pty Ltd
InventorsScott Matthew Starling, Simone Charlotte Vonwiller, Damon Donald Ridley, Kia Silverbrook
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Abstract
A phthalocyanine phthalocyanine salt suitable for formulation in a solvent-based or oil-based ink vehicle is disclosed. The phthalocyanine comprises one or more sulfonate groups and a counterion of at least one sulfonate group is an ammonium cation comprising at least 15 carbon atoms. Ammonium salts of sulfonated gallium naphthalocyanines exemplify such phthalocyanine salts.
Claims18
A phthalocyanine salt comprising one or more sulfonate groups, wherein a counterion of at least one sulfonate group is an ammonium cation comprising at least 20 carbon atoms.
Dependencies are inferred from the claim text.