Stable oil-in-water ink emulsions based upon water-reducible nig

Details Stable oil-in-water ink emulsions based upon water-reducible nig Stable oil-in-water ink emulsions based upon water-reducible nig

1996-07-31

1998-05-05

Klemanski, Helene

Compositions: coating or plastic

Coating or plastic compositions

Marking

106 3126, 106 3147, C09D 1102

Patent

active

057468150

ABSTRACT:
A highly fluid water-based ink composition that comprises a stable oil-in-water emulsion of a water-reducible, water-insoluble nigrosine dye-containing solvent solution, preferably containing a high flash-point and high-boiling point solvent, homogeneously dispersed as small, finely divided dye-containing oil droplets in an aqueous carrier solution containing an emulsion stabilizer of a water-soluble resin. Water-insoluble nigrosine dyes are dissolved preferably in relatively low VOC and non-flammable solvent solutions containing non-ionic surfactants to form emulsifiable water-reducible true nigrosine dye-containing solutions. The water-reducible nigrosine dye-containing solutions are then stably emulsified as dye-containing oil droplets in aqueous solutions that contain water, optional solvent diluents, and water-soluble resins that serves as an emulsion stabilizer. The stable oil-in-water ink emulsion is suitable to be ejected through small ink-jet printer nozzles, or through dispensing tips of felt-tip or roller-ball pens, onto a porous substrate, such as paper, to construct a water-fast printed image on the substrate.

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