Inkjet ink set

Abstract

An ink set is provided which produces a printed article having excellent physical durability. The ink set comprises a first liquid composition containing a reactive carbonyl group and a second liquid composition containing a co-reactive amine group, at least one of the first liquid composition and the second liquid composition further containing a coloring material. When the two inks are printed on a substrate in at least a partially overlapping arrangement, the reactive amine and reactive carbonyl species can crosslink to form a more durable image.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic view of various acrylic monomers that can be used to prepare polycarbonyl acrylic polymers containing reactive carbonyl groups, useful in the practice of this invention.

FIGS. 2 a, 2b and 2c are schematic views of various alpha-methyl styrene monomers that can be used to prepare other types of polycarbonyl polymers containing reactive carbonyl groups, useful in the practice of this invention.

FIGS. 3, 4, 5a-e, 6a-c, and 7 show various synthetic routes to form other types of polycarbonyl polymers.

FIGS. 8 and 9 illustrate various synthetic routes for the preparation of siloxanes with reactive carbonyl groups that can be used to form carbonyl functionalized inorganic oxide particles that can be used as the reactive carbonyl containing species in this invention.

FIGS. 10 a-c and 11a-b show examples of suitable compounds with coreactive amine groups, useful in the practice of this invention.

FIG. 12 shows a synthetic route to a polymer containing pendant amine group(s) useful in this invention.

FIG. 13 illustrates synthetic routes to amine functionalized inorganic oxide particles that can be useful in the practice of this invention.

Claims

1. An inkjet ink set comprising at least a first ink and second ink wherein, a) the first ink comprises a vehicle and a reactive carbonyl-group(s) containing species having at least one reactive carbonyl group; andb) the second ink comprises a vehicle and a reactive amine groups containing species having at least one reactive amine group.

2. The ink set of claim 1 wherein said first ink comprises a reactive carbonyl-group(s) containing species having at least two reactive carbonyl groups and/or said second ink comprises a reactive amine groups containing species having at least two reactive amine groups.

3. The ink set of claims 1 or 2 wherein either one or both of said first and second inks comprises colorant.

4. The carbonyl-group(s) containing species and the reactive amine-group(s) containing species are present, independently, in the form of an additive and/or associated with a colorant in the form of a dispersant adsorbed on a pigment colorant or a species chemically attached to the colorant.

5. The ink set of claim 1 further comprising a third and fourth ink wherein a) said third and fourth ink each independently comprise a reactive carbonyl-group(s) containing species having at least one reactive carbonyl group;b) said first, third and fourth inks comprise colorant; andc) said second ink is substantially colorless.

6. The ink set of claim 5 wherein said third and fourth ink each independently comprise a reactive carbonyl-group(s) containing species having at least two reactive carbonyl groups.

7. The ink set of claim 1 further comprising a third and fourth ink wherein a) said third and fourth ink each independently comprise a reactive amine groups containing species having at least one reactive amine groups;b) said second, third and fourth inks comprise colorant; andc) said first ink is substantially colorless.

8. The ink set of claim 7 wherein said third and fourth ink each independently comprise a reactive carbonyl-group(s) containing species having at least two reactive carbonyl groups.

9. The ink set according to any one of claims 5 to 8 wherein the first, third and fourth inks are cyan, yellow, and magenta colored inks.

10. The ink set according to any one of claims 1 to 9, wherein the reactive carbonyl-group(s) containing species is any one or combination of species depicted in C1-C8 as follows (C1) —C(═O)R1 (C2) —C(═O)H(C3) —X-(EWD)-C(R2)H—C(═O)—R2 (C4) (EWD)-CH—C(═O)—R2 (C5) —C(═NR1)R1 (C6) —C═C(NR3R3)R1 (C7) —C(—OR4)2R1 (C8) —C(—OR4)2Hand the reactive amine groups containing species is any one or combination of species depicted in A1-A5 as follows(A1) R—NH—NH2 (A2) R—C(═O)NH—NH2 (A3) R″R′C═N—NH2 (A4) R—NH—C(═O)NH—NH2 (A5) R′″NH—NH—C(═O)NH—NH2 and whereinR1=C1 to C10 alkyl, or aryl groupR2=C1 to C10 alkyl, or aryl group, or HR3=C1 to C10 alkyl, or aryl group or part of a ring,R4=C1 to C10 alkyl, or part of a ring,R, R′, and R″=alkyl or aryl linkage to multifunctional reactive amine species,R′″=H, or alkyl or aryl linkage to multifunctional reactive amine species, andEWD=electron withdrawing group.

11. A method for ink jet printing onto a substrate, comprising: (a) providing an ink jet printer that is responsive to digital data signals;(b) loading the printer with a substrate to be printed;(c) loading the printer with an ink as set forth in according to any one of claims 1 to 10;(d) printing onto the substrate using the ink or inkjet ink set in response to the digital data signals.

12. The method of claim 11 wherein printing onto the substrate includes at least some printed area of overlap between an ink comprising a reactive carbonyl-group(s) containing species and an ink comprising a reactive amine groups containing species.

13. The method of claim 11 further comprising the step of heating the printed substrate to accelerate the reaction of a reactive carbonyl-group(s) containing species with a reactive amine groups containing species.