Inkjet dyes exhibiting reduced kogation

Details Inkjet dyes exhibiting reduced kogation Inkjet dyes exhibiting reduced kogation

2009-05-14

2011-10-04

Klemanski, Helene (Department: 1734)

Compositions: coating or plastic

Coating or plastic compositions

Marking

C106S031490, C540S122000, C540S133000, C347S100000

Reexamination Certificate

active

08029611

ABSTRACT:
A salt of a sulfonated dye comprising an ammonium cation as a counterion. The ammonium cation comprises at least 3 hydroxyl groups. The salt is useful in reducing kogation in thermal inkjet printheads. One example of these salts is the compound of formula (II):wherein M is Ga(OH); and each of Z1+, Z2+, Z3+and Z4+is protonated 2,2-bis(hydroxymethyl)-2,2′,2″-nitrilotriethanol.

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