Water-based ink for ink-jet recording

Patent metadata

Field	Value
Publication number	US-11434386-B2
Application number	US-201916262311-A
Country	US
Kind code	B2
Filing date	Jan 30, 2019
Priority date	Mar 30, 2018
Publication date	Sep 6, 2022
Grant date	Sep 6, 2022

Abstract

A water-based ink for ink-jet recording includes dyes and water. The dyes include a blue dye having a hue angle of 220° to 280°; a yellow dye having a hue angle of 70° to 120°; and a copper phthalocyanine dye. A mass ratio (C/B) of a content (C) of the copper phthalocyanine dye to a content (B) of the blue dye in an entire amount of the water-based ink is equal to or more than 0.5, and a total content of the dyes in the entire amount of the water-based ink is equal to or more than 6% by mass.

First claim

What is claimed is:

1. A water-based ink for ink-jet recording comprising dyes and water, the dyes comprising:
a blue dye having a hue angle of 220° to 280°;
a yellow dye having a hue angle of 70° to 120°; and
a copper phthalocyanine dye,
wherein a mass ratio (C/B) of a content (C) of the copper phthalocyanine dye to a content (B) of the blue dye in an entire amount of the water-based ink is equal to or more than 0.5, and
a total content of the dyes in the entire amount of the water-based ink is equal to or more than 6% by mass.

2. The water-based ink for ink-jet recording according to claim 1 , wherein the dyes further comprise a magenta dye having a hue angle of 330° to 360° or 0° to 10°.

3. The water-based ink for ink-jet recording according to claim 1 , wherein the following condition (1) is satisfied,
LB>LY>LC   (1)

in the condition (1),
LB: an OD value reduction percentage (%) of an image recorded on glossy paper at 100% Duty by use of 4% by mass of aqueous solution of the blue dye, the reduction percentage being determined by the following equation (I),
LY: an OD value reduction percentage (%) of an image recorded on glossy paper at 100% Duty by use of 4% by mass of aqueous solution of the yellow dye, the reduction percentage being determined by the following equation (I), and
LC; denotes an OD value reduction percentage (%) of an image recorded on glossy paper at 100% Duty by use of 4% by mass of aqueous solution of the copper phthalocyanine dye, the reduction percentage being determined by the following equation (I),
OD value reduction percentage (%)={( X−Y )/ X}× 100  (I)

in the equation (I),
X: an OD value of each of the images immediately after recording, and
Y: an OD value of each of the images after light irradiation is performed for 70 hours by use of a xenon weather meter.

4. The water-based ink for ink-jet recording according to claim 2 , wherein the following condition (2) is satisfied,
LB>LM>LC   (2)

in the condition (2),
LB: an OD value reduction percentage (%) of an image recorded on glossy paper at 100% Duty by use of 4% by mass of aqueous solution of the blue dye, the reduction percentage being determined by the following equation (I),
LM: an OD value reduction percentage (%) of an image recorded on glossy paper at 100% Duty by use of 4% by mass of aqueous solution of the magenta dye, the reduction percentage being determined by the following equation (I), and
LC: an OD value reduction percentage (%) of an image recorded on glossy paper at 100% Duty by use of 4% by mass of aqueous solution of the copper phthalocyanine dye, the reduction percentage being determined by the following equation (I),
OD value reduction percentage (%)={( X−Y )/ X}× 100  (I)

in the equation (I),
X: an OD value of each of the images immediately after recording, and
Y: an OD value of each of the images after light irradiation is performed for 70 hours by use of a xenon weather meter.

5. The water-based ink for ink-jet recording according to claim 2 , wherein the following condition (3) is satisfied,
LB>LY>LM>LC   (3)

in the condition (3),
LB: an OD value reduction percentage (%) of an image recorded on glossy paper at 100% Duty by use of 4% by mass of aqueous solution of the blue dye, the reduction percentage being determined by the following equation (I),
LY: an OD value reduction percentage (%) of an image recorded on glossy paper at 100% Duty by use of 4% by mass of aqueous solution of the yellow dye, the reduction percentage being determined by the following equation (I),
LM: an OD value reduction percentage (%) of an image recorded on glossy paper at 100% Duty by use of 4% by mass of aqueous solution of the magenta dye, the reduction percentage being determined by the following equation (I), and
LC: an OD value reduction percentage (%) of an image recorded on glossy paper at 100% Duty by use of 4% by mass of aqueous solution of the copper phthalocyanine dye, the reduction percentage being determined by the following equation (I),
OD value reduction percentage (%)={( X−Y )/ X}× 100  (I)

in the equation (I),
X: an OD value of each of the images immediately after recording, and
Y: an OD value of each of the images after light irradiation is performed for 70 hours by use of a xenon weather meter.

6. The water-based ink for ink-jet recording according to claim 1 , wherein the mass ratio (C/B) of the content (C) of the copper phthalocyanine dye to the content (B) of the blue dye in the entire amount of the water-based ink is equal to or more than 0.5 and equal or less than 8.0.

7. The water-based ink for ink-jet recording according to claim 1 , wherein the mass ratio (C/B) of the content (C) of the copper phthalocyanine dye to the content (B) of the blue dye in the entire amount of the water-based ink is equal to or more than 0.6 and equal or less than 3.5.

8. The water-based ink for ink-jet recording according to claim 1 , wherein the total content of the dyes in the entire amount of the water-based ink is equal to or more than 9% by mass.

9. The water-based ink for ink-jet recording according to claim 1 , wherein the total content of the dyes in the entire amount of the water-based ink is 6% by mass to 10% by mass.

10. The water-based ink for ink-jet recording according to claim 1 , wherein the blue dye has no phthalocyanine structure.

11. The water-based ink for ink-jet recording according to claim 1 , wherein the blue dye comprises C.I. Acid Blue 90.

12. The water-based ink for ink-jet recording according to claim 1 , wherein the yellow dye comprises at least one of C.I. Direct Yellow 86 and C.I. Direct Yellow 132.

13. The water-based ink for ink-jet recording according to claim 1 , wherein the copper phthalocyanine dye comprises C.I. Direct Blue 199.

14. The water-based ink for ink-jet recording according to claim 2 , wherein the magenta dye comprises a dye represented by the following formula (1):

in the formula (1),
n is 0, 1, or 2
each of R 1 , R 2 , and R 3 is a substituted or non-substituted alkyl group, a substituted or non-substituted alkoxy group, a halogen atom, a hydrogen atom, a hydroxyl group, a substituted or non-substituted carbamoyl group, a substituted or non-substituted sulfamoyl group, a substituted or non-substituted amino group, a nitro group, a sulfonic ester group, a substituted or non-substituted alkylsulfonyl group, a substituted or non-substituted arylsulfonyl group, a carboxy group, or a carboxylic ester group;
R 1 , R 2 and R 3 are identical to or different from each other;
each of R 4 , R 5 and R 6 is a hydrogen atom, a substituted or non-substituted alkyl group, a substituted or non-substituted alkenyl group, a substituted or non-substituted aryl group, a substituted or non-substituted aralkyl group, a substituted or non-substituted alicyclic group, or a substituted or non-substituted heterocyclic group;
R 4 , R 5 and R 6 are identical to or different from each other;
when any one of R 1 to R 6 has at least one acid group, the at least one acid group is non-neutralized acid or salt thereof;
each of three Ms is H, Li, Na, K, NH 4 , NH 3 CH 3 , N(CH 3 ) 4 , NH 3 C 2 H 5 , N(C 2 H 5 ) 4 , NH 2 (C 2 H 4 OH) 2 , NH 3 (C 2 H 4 NH) 5 , or C 2 H 4 NH 2 ; and
the three Ms are identical to or different from each other.

15. The water-based ink for ink-jet recording according to claim 1 , wherein the blue dye is C.I. Acid Blue 90,
the yellow dye is at least one of C.I. Direct Yellow 86 and C.I.

Assignees

• Brother Ind Ltd

Inventors

• Okuda Satoshi
• Maeda Mitsunori
• Tsuzaka Yuka

Classifications

• C09B47/04

  Phthalocyanines {abbreviation: Pc} · CPC title

• C09B29/095

  Amino naphthalenes · CPC title

• C09B55/009

  Azomethine dyes, the C-atom of the group -C=N- being part of a ring (Image) · CPC title

• C09D11/033

  characterised by the solvent · CPC title

• C09B67/0033

  Blends of pigments; Mixtured crystals; Solid solutions · CPC title