Inkjet ink, inkjet recording method and production method of inkjet ink

• US 20040106700A1
• Filed: 11/26/2003
• Published: 06/03/2004
• Est. Priority Date: 11/26/2002
• Status: Active Grant

• Current Assignee: Fujifilm Corporation (Fujifilm Holdings Corporation)
• Original Assignee: Fuji Photo Film Co Limited (Fujifilm Holdings Corporation)
• Inventors: Ishizuka, Takahiro, Yabuki, Yoshiharu, Yamanouchi, Junichi
• Granted Patent: US 7,011,699 B2
• Time in Patent Office: Days
• US Class Current: 523/160
• CPC Class Codes: C09D 11/101 Inks specially adapted for printing processes involving curing by wave energy or particle radiation, e.g. with UV-curing following the printing
• CPC Class Codes: C09D 11/32 characterised by colouring agents

Abstract

The invention provides an inkjet ink which exhibits, at the printing particularly on paper, excellent ink permeability to eliminate the problem of soiling immediately after printing, can be polymerized in higher sensitivity after printing and enables the recording of an image excellent in water resistance and light fastness through polymerization curing, the inkjet ink comprising a coloring fine particle dispersion containing coloring fine particles and at least one oil-soluble dye, a polymerizable hydrophobic ethylenic unsaturated monomer and a polymerization initiator, the at least one oil-soluble dye having an oxidation potential of 1.0 V or more.

Claims

1. An inkjet ink comprising:

a coloring fine particle dispersion containing at least one oil-soluble dye;

a polymerizable hydrophobic ethylenic unsaturated monomer; and

a polymerization initiator,

wherein the at least one oil-soluble dye has an oxidation potential of 1.0 V or more.

2. The inkjet ink as claimed in claim 1, wherein the at least one oil-soluble dye is a compound represented by the following formula (M-I):

3. The inkjet ink as claimed in claim 1, wherein the coloring fine particle dispersion conatins the ethylenic unsaturated monomer in an amount of from 25 to 90 wt %.

4. The inkjet ink as claimed in claim 1, wherein the coloring fine particle dispersion contains the polymerization initiator.

5. The inkjet ink as claimed in claim 1, wherein the polymerization initiator is a polymerization initiator capable of generating a radical on heating or irradiation of an ultraviolet ray.

6. The inkjet ink as claimed in claim 1, wherein the hydrophobic ethylenic unsaturated monomer has a boiling point of 150°

C. or more.

7. The inkjet ink as claimed in claim 1, wherein coloring fine particles in the coloring fine particle dispersion have a volume average particle size of from 1 to 300 nm.

8. The inkjet ink as claimed in claim 1, which has a viscosity of 10 mPa·

s or less.

9. The inkjet ink as claimed in claim 2, wherein the compound represented by formula (M-I) is a compound represented by the following formula (M-II):

10. An inkjet recording method comprising:

recording an image by using the inkjet ink claimed in claim 1;

and

then polymerizing the hydrophobic ethylenic unsaturated monomer.

11. The inkjet recording method as claimed in claim 10, wherein the image is recorded on an image-receiving material comprising a support having thereon an ink-accepting layer containing a porous inorganic pigment.

12. A method for producing an inkjet ink, which is the inkjet ink claimed in claim 1, comprising emulsion-dispersing a solution containing a hydrophobic ethylenic unsaturated monomer and an oil-soluble dye in an aqueous medium to obtain a coloring fine particle dispersion.