Pigmented inks and methods to improve ink performance

Details Pigmented inks and methods to improve ink performance Pigmented inks and methods to improve ink performance

2005-05-24

2005-05-24

Harlan, Robert D. (Department: 1713)

Compositions: coating or plastic

Coating or plastic compositions

Marking

C523S160000, C523S161000, C347S100000, C347S101000

Reexamination Certificate

active

06896724

ABSTRACT:
The present invention relates to a pigment dispersion and a method of producing a pigment dispersion by grinding a grind mixture comprising a pigment, a humectant, water, and a polymeric dispersant. The invention also relates to an ink composition comprising an aqueous carrier and a pigment dispersion produced by grinding a grind mixture comprising a pigment, a humectant, water, and a polymeric dispersant. The invention also relates to an ink composition comprising a pigment, a polymeric dispersant, a humectant, a basic dye, an aqueous carrier, wherein the pH of the ink composition is less than or equal to 7.

REFERENCES:
patent: 5364461 (1994-11-01), Beach et al.
patent: 5719204 (1998-02-01), Beach et al.
patent: 5891231 (1999-04-01), Gnerlich et al.
patent: 6053317 (2000-04-01), Morris et al.
patent: 6644799 (2003-11-01), Han-Adebekun et al.
patent: WO 02102905 (2002-12-01), None

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