Bleed alleviation using zwitterionic surfactants and cationic dy

Details Bleed alleviation using zwitterionic surfactants and cationic dy Bleed alleviation using zwitterionic surfactants and cationic dy

1991-08-28

1992-04-21

Dixon, Jr., William R.

Compositions: coating or plastic

Coating or plastic compositions

Metal-depositing composition or substrate-sensitizing...

106 22, 106 23, 106 30, 8543, C09D 1100

Patent

active

051064162

ABSTRACT:
Color bleed (the invasion of one color into another on the surface of the print medium) using ink-jet inks is alleviated by employing zwitterionic surfactants (ph-sensitive or pH-insensitive) or ionic or non-ionic amphiphiles. The inks of the invention comprise a vehicle and a cationic dye. The vehicle typically comprises a low viscosity, high boiling point solvent, one or two amphiphiles at concentrations above their critical micelle concentration (cmc), while the dye typically comprises any of the dyes commonly employed in ink-jet printing. The amount of surfactants/amphiphile is described in terms of its critical micelle concentration (cmc), which is a unique value for each amphiphile. Above the cmc, micelles form, which attract the dye molecule and thus control the color bleed. Below the cmc, there is no micelle formation, and thus no control of the color bleed.

REFERENCES:
patent: 3615754 (1971-10-01), Grotshall
patent: 3642502 (1972-02-01), Schneider
patent: 3870528 (1975-04-01), Edds et al.
patent: 4165399 (1979-08-01), Germonprez
patent: 4210566 (1980-07-01), Murray
patent: 4225475 (1980-09-01), Carumpalos
patent: 4398915 (1983-08-01), Panto et al.
patent: 4400216 (1983-08-01), Arora
patent: 5026427 (1991-06-01), Mitchell et al.

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