Ink jet inks containing polyacrylamides
AssigneeE. I. Du Pont de Nemours and Company
InventorsDavid Herbert Donovan, Gregg Allen Lane, Chaucer C. Tang
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Abstract
Ink jet ink compositions containing an aqueous carrier medium, an aqueous carrier medium insoluble colorant, a structured polymeric dispersant and a film-forming polyacrylamide polymer having a weight average molecular weight of 500-100,000 exhibit reduced film cracking, rapid drying, excellent image definition, are storage stable and have excellent decap properties and, when used in combination with a differently colored ink, result in reduced bleed in multi-colored printed elements.
Claims7
A process for creating a multicolor printed element having reduced color bleed, the process comprising:
- (a) printing a first ink onto a substrate;
- (b) printing a second ink onto the substrate and in contact with said first ink;
- wherein at least one of said first and second inks comprises an aqueous carrier medium, an aqueous carrier medium insoluble colorant, a structured polymeric dispersant and a film-forming polyacrylamide polymer having a weight average molecular weight of 500-100,000.
Dependencies are inferred from the claim text.