Ink compositions for thermal ink printing

Details Ink compositions for thermal ink printing Ink compositions for thermal ink printing

1997-10-30

1998-06-30

Klemanski, Helene

Compositions: coating or plastic

Coating or plastic compositions

Marking

106 3149, 106 3175, 106 3178, C09D 1102

Patent

active

057727449

ABSTRACT:
Disclosed is an ink composition which comprises water, a colorant, betaine, wherein n is an integer of from about 8 to about 20 and B is a cation. In one specific embodiment, n is 10 and B is (HO--CH.sub.2 CH.sub.2).sub.2 NH.sub.3.sup.+. In another specific embodiment, the tertiary amine is 1-methylimidazole. In yet another specific embodiment of the present invention, the colorant is an anionic dye with carboxylate groups, sulfonate groups, or both carboxylate and sulfonate groups. Also disclosed is a process for preparing the aforementioned ink composition wherein a to centrifugation. Also disclosed are ink jet printing processes employing the aforementioned ink.

REFERENCES:
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patent: 4880565 (1989-11-01), Rose et al.
patent: 5019166 (1991-05-01), Schwarz
patent: 5156675 (1992-10-01), Breton et al.
patent: 5389133 (1995-02-01), Gundlach et al.
patent: 5401303 (1995-03-01), Stoffel et al.
patent: 5531815 (1996-07-01), Gundlach et al.
patent: 5540765 (1996-07-01), Gundlach et al.
patent: 5560766 (1996-10-01), Gundlach
patent: 5560770 (1996-10-01), Yatake
patent: 5690722 (1997-11-01), Pawlowski

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