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US 5,969,112 AGranted
Yellow cationic dyes having flocculating properties
AssigneeLexmark International, Inc.
InventorsJames F. Feeman, Jing X. Sun
Life of this patent
Estimating the term…
Abstract
A flocculating dye reduces bleed between two inks when they are applied side by side. A first ink comprises the flocculating dye which flocculates the dispersant-pigment of the second ink.
Claims3
A flocculating dye of the structural formula selected from the group consisting of:
- ##STR34## wherein each m is independently about 0 to 6;
- each R is independently lower (C.sub.1-4) alkyl, arylalkyl or hydroxyalkyl;
- R.sub.5 is lower (C.sub.1-4) alkyl or CO.sub.2 M;
- R.sub.6 is H, halogen, lower alkyl or lower alkoxyl;
- each R.sub.7 is independently H, lower alkyl or lower alkoxyl;
- each R.sub.3 is independently lower (C.sub.1-4) alkyl or hydroxyalkyl;
- ##STR35## m' is about 0 to 6;
- and A is --OH or --NH.sub.2.
5 more elements
A flocculating dye of structural formula selected from the group consisting of:
- ##STR36## wherein Y.sub.1 is ##STR37## and R.sub.6 is H, halogen, lower alkyl or lower alkoxyl.
A flocculating dye of the structural formula selected from the group consisting of:
- ##STR38## wherein each M is independently H.sup..sym., Na.sup..sym., K.sup..sym., Li.sup..sym., or N.sup..sym. (R.sub.2).sub.4 and each R.sub.2 is independently H, lower (C.sub.1-4) alkyl or hydroxyalkyl.
Dependencies are inferred from the claim text.