Active-energy-ray-curable composition, active-energy-ray-curable ink, composition stored container, method and apparatus for forming two-dimensional or three-dimensional image, two-dimensional or three-dimensional image, structure, and processed product

Patent metadata

Field	Value
Publication number	US-9969894-B2
Application number	US-201615042928-A
Country	US
Kind code	B2
Filing date	Feb 12, 2016
Priority date	Mar 3, 2015
Publication date	May 15, 2018
Grant date	May 15, 2018

Abstract

An active-energy-ray-curable composition including: a cyan pigment; and a polymerizable compound, wherein a ratio of absorbance at a wavelength of 385 nm to absorbance at a wavelength of 620 nm is 0.65 or less.

First claim

What is claimed is:

1. An active-energy-ray-curable composition, comprising:
a cyan pigment in particle form;
a dispersant polymer; and
a polymerizable compound,
wherein the cyan pigment comprises C.I. pigment blue 15:4, and
wherein a ratio of absorbance of the composition at a wavelength of 385 nm to absorbance of the composition at a wavelength of 620 nm (A 385 , A 620 ) is 0.65 or less, and
wherein a distribution width of particle size distribution of pigment particles in the active-energy-ray-curable composition is 60 nm or less as determined by Formula (1):
Distribution width of particle size distribution=(84% cumulative volume particle diameter−16% cumulative volume particle diameter)/2  Formula (1).

2. The active-energy-ray-curable composition according to claim 1 ,
wherein an amount of the dispersant polymer is from 10-50% by mass relative to a total amount of the cyan pigment, and
wherein the ratio is 0.57 or less.

3. The active-energy-ray-curable composition according to claim 1 , wherein a 50% cumulative volume particle diameter of pigment particles in the active-energy-ray-curable composition is 100 nm or more but 160 nm or less.

4. The active-energy-ray-curable composition according to claim 1 , wherein a coloring density of a cured material having an average thickness of 10 μm is 2.00 or more, where the cured material is obtained through curing by irradiating the active-energy-ray-curable composition with active energy rays having an illuminance of 1 W/cm 2 and an irradiation dose of 500 mJ/cm 2 on a base.

5. The active-energy-ray-curable composition according to claim 1 ,
wherein change of viscosity of the active-energy-ray-curable composition as determined by Formula (2) below is 15% or less,
Change of viscosity (%)=| V−V 0 |/V 0 ×100  Formula (2),

wherein the Formula (2), V 0 is a viscosity at 25° C. before storage, and V is a viscosity at 25° C. after storage at 70° C. for 14 days.

6. The active-energy-ray-curable composition according to claim 1 , wherein the dispersant polymer is an amino group-containing dispersant polymer, and
wherein an amine value of the amino group-containing dispersant polymer is 10 mg KOH/g or more but 30 mg KOH/g or less.

7. The active-energy-ray-curable composition according to claim 5 , wherein the change of viscosity is 10% or less.

8. The active-energy-ray-curable composition according to claim 5 , wherein the change of viscosity is 5% or less.

9. An active-energy-ray-curable ink comprising
the active-energy-ray-curable composition according to claim 1 .

10. The active-energy-ray-curable ink according to claim 9 ,
wherein the active-energy-ray-curable ink is used for an inkjet.

11. A composition stored container comprising:
a container; and
the active-enemy-ray-curable composition according to claim 1 in the container.

12. An apparatus for forming a two-dimensional or three-dimensional image, the apparatus comprising:
a storing part containing an active-energy-ray-curable composition; and
an irradiator configured to irradiate the active-energy-ray-curable composition with active energy rays,
wherein the active-energy-ray-curable composition comprises:
a cyan pigment in particle form;
a dispersant polymer; and
a polymerizable compound,

wherein the cyan pigment comprises C.I. pigment blue 15:4,
wherein a ratio of absorbance of the composition at a wavelength of 385 nm to absorbance of the composition at a wavelength of 620 nm (A 385 /A 620 ) is 0.65 or less, and
wherein a distribution width of particle size distribution of pigment particles in the active-energy-ray-curable composition is 60 nm or less as determined by Formula (1):
Distribution width of particle size distribution=(84% cumulative volume particle diameter−16% cumulative volume particle diameter)/2  Formula (1).

13. The apparatus for forming the two-dimensional or three-dimensional image according to claim 12 , further comprising an ejecting device configured to eject the active-energy-ray-curable composition by an inkjet recording method.

14. A method for forming a two-dimensional or three-dimensional image, the method comprising
irradiating an active-energy-ray-curable composition with active energy rays,
wherein the active-energy-ray-curable composition comprises:
a cyan pigment in particle form;
a dispersant polymer; and
a polymerizable compound,

wherein the cyan pigment comprises C.I. pigment blue 15:4,
wherein a ratio of absorbance of the composition at a wavelength of 385 nm to absorbance of the composition at a wavelength of 620 nm (A 385 /A 620 ) is 0.65 or less, and
wherein a distribution width of particle size distribution of pigment particles in the active-energy-ray-curable composition is 60 nm or less as determined by Formula (1):
Distribution width of particle size distribution=(84% cumulative volume particle diameter−16% cumulative volume particle diameter)/2  Formula (1).

15. The method for forming the two-dimensional or three-dimensional image according to claim 14 , further comprising
ejecting the active-energy-ray-curable composition by an inkjet recording method.

16. The method for forming the two-dimensional or three-dimensional image according to claim 14 ,
wherein the active energy rays comprise light of a light-emitting diode.

17. A two-dimensional or three-dimensional image, which is obtained by irradiating the active-energy-ray-curable composition according to claim 1 with active energy rays.

18. A structure comprising:
a base; and
the two-dimensional or three-dimensional image according to claim 17 on the base.

19. A processed product, which is obtained by drawing the two-dimensional or three-dimensional image according to claim 17 .

Assignees

• Hirade Tomohiro
• Asami Tsuyoshi
• Ricoh Co Ltd

Inventors

• Hirade Tomohiro
• Asami Tsuyoshi

Classifications

• B29K2105/0032

  Pigments, colouring agents or opacifiyng agents · CPC title

• B33Y70/00

  Materials specially adapted for additive manufacturing · CPC title

• C09D11/322 Primary

  Pigment inks · CPC title

• B33Y10/00

  Processes of additive manufacturing · CPC title

• C09D11/101

  Inks specially adapted for printing processes involving curing by wave energy or particle radiation, e.g. with UV-curing following the printing · CPC title