Thermal transfer recording sheet

Patent metadata

Field	Value
Publication number	US-9481192-B2
Application number	US-201514836799-A
Country	US
Kind code	B2
Filing date	Aug 26, 2015
Priority date	Feb 28, 2014
Publication date	Nov 1, 2016
Grant date	Nov 1, 2016

Abstract

An object of the present invention is to provide a thermal transfer recording sheet that enables high-chroma images to be formed, has a high color-developability that enables a wide color gamut to be achieved, and enables high-quality black images to be formed using process black. The thermal transfer recording sheet includes a base material, and a yellow dye layer including a yellow dye, a magenta dye layer including a magenta dye, and a cyan dye layer including a cyan dye that are disposed on the base material. The magenta dye, yellow dye, and cyan dye each contain specific compounds.

First claim

The invention claimed is:

1. A thermal transfer recording sheet comprising a base material and a colorant layer on the base material,
wherein the colorant layer includes a yellow dye layer comprising a yellow dye, a magenta dye layer comprising a magenta dye, and a cyan dye layer comprising a cyan dye,
the magenta dye containing a compound represented by General Formula (1),
the yellow dye containing a compound represented by General Formula (2), and
the cyan dye containing at least one compound selected from the group consisting of compounds represented by General Formulae (3) to (5),

wherein, in General Formula (1),
R 1 and R 2 each independently represent an alkyl group;
R 3 represents a hydrogen atom, an alkyl group, an aryl group having no substituents, or an aryl group having a substituent;
R 4 represents an alkyl group, an aryl group having no substituents, or an aryl group having a substituent; and
R 5 represents a hydrogen atom, an alkyl group, an aryl group having no substituents, an aryl group having a substituent, or —N(—R 6 )R 7 , R 6 and R 7 each independently represent a hydrogen atom, an alkyl group, or an acyl group, and R 6 and R 7 may be bonded to each other to form a ring,

wherein, in General Formula (2),
R 8 represents an alkyl group;
R 9 represents a hydrogen atom or an alkyl group;
R 10 represents an alkyl group, an aryl group having no substituents, an aryl group having a substituent, or an amino group;
R 11 represents a hydrogen atom, a cyano group, a carbamoyl group, a carboxylic acid ester group, or a carboxylic acid amide group;
R 12 represents a hydrogen atom, an alkyl group, an aryl group having no substituents, an aryl group having a substituent, or —N(—R 13 )R 14 , R 13 and R 14 each independently represent a hydrogen atom, an alkyl group, or an acyl group, and R 13 and R 14 may be bonded to each other to form a ring;
X represents a carbonyl group or a sulfonyl group; and
n is an integer of 1 to 3,

wherein, in General Formula (3), R 15 to R 19 each independently represent an alkyl group, an aryl group having no substituents, or an aryl group having a substituent,

wherein, in General Formula (4), R 20 and R 21 each independently represent an alkyl group, an aryl group having no substituents, or an aryl group having a substituent, and

wherein, in General Formula (5), R 22 to R 26 each independently represent an alkyl group, an aryl group having no substituents, or an aryl group having a substituent.

2. The thermal transfer recording sheet according to claim 1 , wherein R 3 in General Formula (1) is an alkyl group.

3. The thermal transfer recording sheet according to claim 1 , wherein R 3 in General Formula (1) is a tert-butyl group.

4. The thermal transfer recording sheet according to claim 1 , wherein any one of R 6 and R 7 in General Formula (1) is an alkyl group.

5. The thermal transfer recording sheet according to claim 1 , wherein the magenta dye contains, in addition to the compound represented by General Formula (1), at least one compound selected from the group consisting of compounds represented by General Formulae (6) to (9),

wherein, in General Formula (6), R 27 represents an alkyl group, an aryl group having no substituents, an aryl group having a substituent, or —(R 47 —O)n-R 48 , R 47 represents an alkylene, and R 48 represents an alkyl group,

wherein, in General Formula (7), R 28 and R 29 each independently represent an alkyl group, an aryl group having no substituents, or an aryl group having a substituent,

wherein, in General Formula (8), R 30 to R 34 each independently represent an alkyl group, an aryl group having no substituents, or an aryl group having a substituent, and

wherein, in General Formula (9), R 35 to R 38 each independently represent an alkyl group, an aryl group having no substituents, or an aryl group having a substituent.

6. The thermal transfer recording sheet according to claim 1 , wherein the yellow dye contains, in addition to the compound represented by General Formula (2), at least one compound selected from the group consisting of compounds represented by General Formulae (10) to (12),

wherein, in General Formula (10), R 39 and R 42 each independently represent an alkyl group, an aryl group having no substituents, or an aryl group having a substituent,

wherein, in General Formula (11), R 43 and R 44 each independently represent an alkyl group, an aryl group having no substituents, or an aryl group having a substituent, and

wherein, in General Formula (12), R 45 and R 46 each independently represent an alkyl group, an aryl group having no substituents, or an aryl group having a substituent.

7. The thermal transfer recording sheet according to claim 1 ,
wherein the magenta dye further contains a compound represented by General Formula (6) or a compound represented by General Formula (9), and
wherein the cyan dye further contains the compound represented by General Formula (3) or the compound represented by General Formula (4),

wherein, in General Formula (6), R 27 represents an alkyl group, an aryl group having no substituents, an aryl group having a substituent, or —(R 47 —O)n-R 48 , R 47 represents an alkylene, and R 48 represents an alkyl group, and

wherein, in General Formula (9), R 35 to R 38 each independently represent an alkyl group, an aryl group having no substituents, or an aryl group having a substituent.

Assignees

• Canon Kk

Inventors

• Nakano Masao
• Katsumoto Yuko
• Shintou Taichi

Classifications

• C09B23/00

  Methine or polymethine dyes, e.g. cyanine dyes · CPC title

• B41M2205/30

  Thermal donors, e.g. thermal ribbons · CPC title

• B41M5/3858

  Mixtures of dyes, at least one being a dye classifiable in one of groups B41M5/385 - B41M5/39 · CPC title

• B41M2205/02

  Dye diffusion thermal transfer printing (D2T2) · CPC title

• B41M5/388 Primary

  Azo dyes · CPC title