Water-based printing ink compositions containing a lignin acetate binder
AssigneeWestvaco Corporation
InventorsJames E. Miller, Jr., Peter Dilling
Life of this patent
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Abstract
An improved water-based printing ink composition comprising, in aqueous medium, a colorant selected from the group consisting of a dispersed dye, a pigment, and mixtures thereof; and a water-insoluble non-sulfonated lignin acetate binder for the colorant. Also disclosed is a method of producing the improved water-based printing ink composition by reductively acetylating a non-sulfonated lignin to form a lignin acetate, drying the lignin acetate, and combining the dried lignin acetate in aqueous medium with a printing ink colorant.
Claims5
An improved water-based printing ink composition comprising, in aqueous medium, a colorant selected from the group consisting of a dispersed dye, a pigment, and mixtures thereof;
- and a water-insoluble non-sulfonated lignin acetate binder for the colorant.
A method of producing an improved water-based printing ink composition having improved color in application comprising the steps of:
- (a) providing a water-insoluble non-sulfonated lignin;
- (b) reductively acetylating the non-sulfonated lignin to form a lignin acetate compound of reduced color content;
- (c) subjecting the resultant lignin acetate to a drying step;
- and
- (d) combining the dried lignin acetate, in aqueous medium, with a printing ink colorant selected from the group consisting of a dispersed dye, a pigment, and mixtures thereof.
Dependencies are inferred from the claim text.