Ink additives for improved ink-jet performance

Compositions: coating or plastic – Coating or plastic compositions – Marking

Reissue Patent

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C106S031490, C106S031580

Reissue Patent

active

11258587

ABSTRACT:
Oxo anions (both singly and multiply charged), such as phosphates, polyphosphates, and phosphate esters, serve as additives, and in the case of cationic dyes, may serve as replacement counter-ions, for use in thermal ink-jet inks to reduce kogation significantly. The addition of such additive essentially eliminates kogation for the life of ink pens. Further, such additives will prevent kogation for inks containing dyes with negatively-charged water-solubilizing groups, such as sulfonate and carboxylate.

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