Fluid set for inkjet recording

Patent metadata

Field	Value
Publication number	US-12486419-B2
Application number	US-202218261555-A
Country	US
Kind code	B2
Filing date	Jan 17, 2022
Priority date	Jan 26, 2021
Publication date	Dec 2, 2025
Grant date	Dec 2, 2025

Abstract

A fluid set for inkjet printing comprises an aqueous ink jet ink and a co-reactive fluid. The ink jet ink comprises a pigment and a polymeric dispersing agent having a functional group capable of reacting with a primary or secondary amine. The co-reactive fluid comprises a compound having at least two functional groups selected from the group consisting of primary amines and secondary amines. The co-reactive fluid is preferably a primer, an inkjet ink or an over print varnish.

First claim

The invention claimed is:

1 . A fluid set comprising an aqueous ink jet ink and a co-reactive fluid, the ink jet ink comprises a pigment and a polymeric dispersing agent having a functional group represented by formula I, formula II, or formula III, the co-reactive fluid comprises a compound having at least two functional groups selected from the group consisting of primary amines and secondary amines:

wherein
R 1 is selected from the group consisting of a hydrogen, a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkenyl group, a substituted or unsubstituted alkynyl group, a substituted or unsubstituted aralkyl group, a substituted or unsubstituted alkaryl group, a substituted or unsubstituted aryl or heteroaryl group, COR 3 , and CN;
R 2 is selected from the group consisting of a hydrogen, a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkenyl group, a substituted or unsubstituted alkynyl group, a substituted or unsubstituted aralkyl group, a substituted or unsubstituted alkaryl group, a substituted or unsubstituted aryl or heteroaryl group, and COR 3 ;
or R 1 and R 2 represent the necessary atoms to form a five to eight membered ring;
R 3 is selected from the group consisting of a hydrogen, a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkenyl group, a substituted or unsubstituted alkynyl group, a substituted or unsubstituted aralkyl group, a substituted or unsubstituted alkaryl group, a substituted or unsubstituted aryl or heteroaryl group, OR 4 , and NR 5 R 6 ;
R 4 is selected from the group consisting of a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkenyl group, a substituted or unsubstituted alkynyl group, a substituted or unsubstituted aralkyl group, a substituted or unsubstituted alkaryl group, and a substituted or unsubstituted aryl or heteroaryl group;
R 5 and R 6 are each independently selected from the group consisting of a hydrogen, a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkenyl group, a substituted or unsubstituted alkynyl group, a substituted or unsubstituted aralkyl group, a substituted or unsubstituted alkaryl group, and a substituted or unsubstituted aryl or heteroaryl group;
or R 5 and R 6 represent the necessary atoms to form a five to eight membered ring;
X is selected from the group consisting of O and NR 7 ;
n represents 0 or 1;
R 7 is selected from the group consisting of a hydrogen, a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkenyl group, a substituted or unsubstituted alkynyl group, a substituted or unsubstituted aralkyl group, a substituted or unsubstituted alkaryl group, and a substituted or unsubstituted aryl or heteroaryl group; and
R 8 and R 9 are each independently selected from the group consisting of a hydrogen, a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkenyl group, a substituted or unsubstituted alkynyl group, a substituted or unsubstituted aralkyl group, a substituted or unsubstituted alkaryl group, and a substituted or unsubstituted aryl or heteroaryl group, or R 8 and R 9 represent the necessary atoms to form a five to eight membered ring.

2 . The fluid set of claim 1 , wherein the polymeric dispersing agent comprises at least 15 mol % of monomeric units having a functional group according to formula I relative to the total monomer composition.

3 . The fluid set of claim 1 , wherein the compound is a resin particle, having at least 5 functional groups selected from the group consisting of a primary amine and a secondary amine.

4 . The fluid set of claim 1 , wherein the compound is di- or trifunctional.

5 . The fluid set of claim 3 , wherein the resin particle is crosslinked.

6 . The fluid set of claim 3 , wherein the resin particle comprises a resin having at least one repeating unit comprising a primary amine.

7 . The fluid set of claim 6 , wherein the primary amine is selected from the group consisting of a vinyl amine and an allyl amine.

8 . The fluid set of claim 1 , wherein the co-reactive fluid comprises a flocculating agent selected from the group of multivalent salts and cationic resins.

9 . The fluid set of claim 8 , wherein the co-reactive fluid further comprises a white pigment.

10 . The fluid set of claim 1 , wherein the co-reactive fluid comprises a colorant.

11 . The fluid set of claim 1 , wherein the co-reactive fluid comprises an acrylic based resin, a urethane based resin, or a polyethylene wax.

12 . The fluid set of claim 6 , wherein the co-reactive fluid comprises an acrylic based resin, a urethane based resin, or a polyethylene wax.

13 . An inkjet recording method using the fluid set as defined in claim 1 comprising the steps of:
a) jetting the aqueous inkjet ink as defined in claim 1 onto a substrate;
b) applying the co-reactive fluid as defined in claim 1 before, after, or during the jetting of the inkjet ink; and
c) drying the applied fluid set by applying heat such as to obtain a temperature of the jetted ink of at least 60° C.

14 . An inkjet recording method using the fluid set as defined in claim 6 comprising the steps of:
a) jetting the aqueous inkjet ink as defined in claim 6 onto a substrate;
b) applying the co-reactive fluid as defined in claim 6 before, after, or during the jetting of the inkjet ink; and
c) drying the applied fluid set by applying heat such as to obtain a temperature of the jetted ink of at least 60° C.

Assignees

• Agfa Nv

Inventors

• Loccufier Johan
• Decoster Luc

Classifications

• B41J2/2107

  characterised by the ink properties (supplying ink in a solid state B41J2/17593) · CPC title

• B41J2/01

  Ink jet · CPC title

• C09D11/38

  characterised by non-macromolecular additives other than solvents, pigments or dyes · CPC title

• C09D11/326

  characterised by the pigment dispersant · CPC title

• C09D11/322

  Pigment inks · CPC title