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US 5,108,502 AGranted
Boronic acid dyes
AssigneeHewlett-Packard Company
InventorsNorman E. Pawlowski, Dale D. Russell, Karla M. Robotti
Life of this patent
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Abstract
Boronic dyes corresponding to the formula ##STR1## wherein D is an organic dye moiety, and n is 1 or 2 are described. Inks which are formulated for ink-jet printing and contain such a dye provide excellent images when printed on paper.
Claims20
An azo dye of the formula ##STR32## wherein Ar is a phenylene or substituted phenylene, Ar.sub.1 is an arylene or substituted arylene free of sulfonate groups, Ar.sub.2 is an aryl or substituted aryl free of sulfonate groups, m is 0 or an integer from 1 to about 4, and n is an integer from 1 to 2.
An ink-jet ink for use in an ink-jet printer comprising:
- (a) from about 0.05% to about 10% of a water soluble organic dye which has at least one boronic acid group on an aryl radical,
- (b) a pH adjuster to maintain the formulation at a pH from about 6 to about 9, and
- (c) the balance water.
Dependencies are inferred from the claim text.