Potassium substituted inks for ink-jet printers

Details Potassium substituted inks for ink-jet printers Potassium substituted inks for ink-jet printers

1990-11-05

1991-12-03

Dixon, Jr., William R.

Compositions: coating or plastic

Coating or plastic compositions

Metal-depositing composition or substrate-sensitizing...

106 20, C09D 1102

Patent

active

050697188

ABSTRACT:
The properties of inks employing copper phthalocyanine dyes having associated therewith sodium cations are improved by replacing the sodium cations with potassium cations. This ion exchange is preferably performed by passing a potassium-containing base through a strong acid resin to replace the H.sup.+ ions with K.sup.+ ions. The dye is then passed through the potassium-loaded resin to effect the ion exchange. Inks made from the potassium-substituted dyes evidence reduced crusting, increased idle time without causing drop ejection failures (soft plugs) and improved kogation without suffering any loss in print quality.

REFERENCES:
patent: 3945836 (1976-03-01), Miyata et al.
patent: 3945837 (1976-03-01), Miyata et al.
patent: 4685968 (1987-08-01), Palmer
patent: 4761180 (1988-08-01), Askeland
patent: 4786327 (1988-11-01), Wenzel et al.
patent: 4790880 (1988-12-01), Miller
patent: 4793860 (1988-12-01), Murakami et al.
patent: 4810292 (1989-03-01), Palmer et al.

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