Radiation curable type ink jet ink set and ink jet recording method

Patent metadata

Field	Value
Publication number	US-2016333201-A1
Application number	US-201615222304-A
Country	US
Kind code	A1
Filing date	Jul 28, 2016
Priority date	Feb 13, 2014
Publication date	Nov 17, 2016
Grant date	—

Abstract

A radiation curable type ink jet ink set contains a magenta ink which contains C. I. Pigment Red 57:1 in an amount of 2.0% by mass to 4.0% by mass and a yellow ink which contains C. I. Pigment Yellow 185 in an amount of 1.5% by mass to 4.0% by mass. An ink jet recording method includes a jetting step of jetting the yellow ink and/or the magenta ink contained in the radiation curable type ink jet ink set onto a substrate from an ink jet recording head, and a curing step of curing the magenta ink and/or the yellow ink by radiation irradiation.

First claim

What is claimed is:

1 . A radiation curable type ink jet ink set comprising:
a magenta ink which contains C. I. Pigment Red 57:1 in an amount of 2.0% by mass to 4.0% by mass; and a yellow ink which contains C. I. Pigment Yellow 185 in an amount of 1.5% by mass to 4.0% by mass.

2 . The radiation curable type ink jet ink set according to claim 1 ,
wherein both of the magenta ink and the yellow ink contain a polymer dispersant having an amine value of 35 mgKOH/g to 45 mgKOH/g.

3 . The radiation curable type ink jet ink set according to claim 2 ,
wherein the polymer dispersant is a copolymer having a monomer unit represented by the following Formula (1).

4 . The radiation curable type ink jet ink set according to claim 2 ,
wherein the polymer dispersant is a copolymer having a monomer unit represented by the following Formula (1), a monomer unit represented by the following Formula (2), and a monomer unit represented by the following Formula (3),

in the formulae, R 1 represents an alkyl group having 2 to 15 carbon atoms, and R 2 represents a polyalkylene oxide group having 10 to 50 carbon atoms that has a hydroxy group or an alkoxy group on a terminal.

5 . The radiation curable type inkjet ink set according to claim 3 ,
wherein in a case where the total content of the monomer units constituting the polymer dispersant is 100 mol %, the content of the monomer unit represented by Formula (1) in the polymer dispersant is 10 mol % to 30 mol %.

6 . The radiation curable type ink jet ink set according to claim 2 ,
wherein in a case where the content of C. I. Pigment Red 57:1 or C. I. Pigment Yellow 185 is denoted as Mp, and the content of the polymer dispersant is denoted as Md, a mass ratio of Md/Mp in each of the magenta ink and the yellow ink is 0.2 to 0.5.

7 . The radiation curable type ink jet ink set according to claim 1 ,
wherein both of the magenta ink and the yellow ink further contain a polyfunctional ethylenically unsaturated compound having one or more vinyl ether groups.

8 . The radiation curable type ink jet ink set according to claim 2 ,
wherein both of the magenta ink and the yellow ink further contain a polyfunctional ethylenically unsaturated compound having one or more vinyl ether groups.

9 . The radiation curable type ink jet ink set according to claim 3 ,
wherein both of the magenta ink and the yellow ink further contain a polyfunctional ethylenically unsaturated compound having one or more vinyl ether groups.

10 . The radiation curable type ink jet ink set according to claim 7 ,
wherein the polyfunctional ethylenically unsaturated compound having one or more vinyl ether groups is a polyfunctional ethylenically unsaturated compound having two or more vinyl ether groups.

11 . The radiation curable type inkjet ink set according to claim 1 ,
wherein both of the magenta ink and the yellow ink further contain 3-methyl-1,5-pentanediol diacrylate.

12 . The radiation curable type ink jet ink set according to claim 11 ,
wherein the content of the 3-methyl-1,5-pentanediol diacrylate in each of the magenta ink and the yellow ink is equal to or greater than 50% by mass.

13 . The radiation curable type ink jet ink set according to claim 11 ,
wherein the content of the 3-methyl-1,5-pentanediol diacrylate in each of the magenta ink and the yellow ink is 50% by mass to 75% by mass.

14 . The radiation curable type ink jet ink set according to claim 1 ,
wherein both of the magenta ink and the yellow ink further contain a trifunctional (meth)acrylate compound.

15 . The radiation curable type ink jet ink set according to claim 2 ,
wherein both of the magenta ink and the yellow ink further contain a trifunctional (meth)acrylate compound.

16 . The radiation curable type ink jet ink set according to claim 3 ,
wherein both of the magenta ink and the yellow ink further contain a trifunctional (meth)acrylate compound.

17 . The radiation curable type ink jet ink set according to claim 7 ,
wherein both of the magenta ink and the yellow ink further contain a trifunctional (meth)acrylate compound.

18 . The radiation curable type ink jet ink set according to claim 1 that is a radiation curable type ink jet ink set for a printed material used indoors.

19 . An ink jet recording method comprising:
(1) jetting the magenta ink and/or the yellow ink contained in the radiation curable type ink jet ink set according to claim 1 onto a substrate from an ink jet recording head; and (2) curing the jetted magenta ink and/or the yellow ink by radiation irradiation.

20 . The ink jet recording method according to claim 19 ,
wherein a printed material for indoor use is obtained.

Assignees

• Fujifilm Corp

Inventors

• Umebayashi Tsutomu

Classifications

• B41M7/0081

  using electromagnetic radiation or waves, e.g. ultraviolet radiation, electron beams · CPC title

• C09D11/322

  Pigment inks · CPC title

• C09D11/40

  Ink-sets specially adapted for multi-colour inkjet printing · CPC title

• C09D11/326 Primary

  characterised by the pigment dispersant · CPC title

• C09D11/03 Primary

  characterised by features other than the chemical nature of the binder · CPC title