Back to results
US 8,710,116 B2Granted
Inkjet ink
AssigneeE. I. Du Pont de Nemours and Company
InventorsJose Esteban Valentini, Dean M. Fake, Christian Jackson
Life of this patent
Estimating the term…
Abstract
This invention pertains to an ink for inkjet printing, in particular to an aqueous ink comprising a self-dispersing pigment colorant and certain soluble polymers which enhance print quality without compromising jetting performance.
Claims13
An aqueous inkjet ink composition comprising:
- (a) a self-dispersing pigment;
- (b) an aqueous vehicle;
- and
- (c) a structured polymer that is soluble in the aqueous vehicle, wherein said structured polymer is either
- i) a soluble AB or ABC block copolymer with an A block of benzyl methacrylate;
- or
- ii) a soluble graft copolymer, wherein said graft copolymer comprises 50-90% by weight, of a polymeric backbone and 10-50% by weight, of macromonomer side chains attached to the backbone at a single terminal point, and said graft copolymer has a weight average molecular weight of 5,000-100,000, wherein
- (i′) the polymeric backbone is hydrophobic in comparison to the side chains and consists essentially of polymerized phenoxyethylacrylate and ethoxytriethyleneglycol methacrylate, and up to 20% by weight, based on the weight of the graft copolymer, of polymerized methacrylic acid;
- and
- (ii′) the macromonomer sidechains have a weight average molecular weight of about 1,000-30,000 and consist of polymerized ethoxytriethyleneglycol methacrylate and 2-100% by weight, based on the weight of the macromonomer side chains, of polymerized methacrylic acid.
7 more elements
Dependencies are inferred from the claim text.