Thermal transfer recording sheet

Patent metadata

Field	Value
Publication number	US-11097566-B2
Application number	US-201916362942-A
Country	US
Kind code	B2
Filing date	Mar 25, 2019
Priority date	Oct 19, 2016
Publication date	Aug 24, 2021
Grant date	Aug 24, 2021

Abstract

An object of the present invention is to provide a thermal transfer recording sheet that provides an image that is excellent in light fastness and has a satisfactory imbalance. The present invention relates to a thermal transfer recording sheet including a substrate and dye layers (a yellow dye layer, a magenta dye layer, and a cyan dye layer), in which one or more kinds of the dye layers each contain one or more kinds of specific compounds. The present invention also relates to a thermal transfer recording sheet including a substrate, dye layers, and a protective layer for protecting the surface of an image, in which the protective layer contains one or more kinds of specific compounds.

First claim

What is claimed is:

1. A thermal transfer recording sheet comprising:
a substrate;
a yellow dye layer containing a yellow dye;
a magenta dye layer containing a magenta dye; and
a cyan dye layer containing a cyan dye,
wherein one or more of the yellow dye layer, the magenta dye layer, and the cyan dye layer contain one or more compounds selected from the group consisting of compounds represented by general formulae (1) and (2),
wherein the yellow dye contains one or more compounds selected from the group consisting of compounds represented by general formulae (3) to (6), and
wherein the cyan dye contains one or more compounds selected from the group consisting of compounds represented by general formulae (7) to (9):

wherein, in the general formula (1), R 1 to R 8 each independently represents a substituted or unsubstituted alkyl group having 1 to 8 carbon atoms, a substituted or unsubstituted alkenyl group, a substituted or unsubstituted aralkyl group, a substituted or unsubstituted alkynyl group, or a substituted or unsubstituted aryl group, and R 1 and R 2 , R 3 and R 4 , R 5 and R 6 , and R 7 and R 8 may each be bonded to each other to form a ring, and X − represents an anion;

wherein, in the general formula (2), R′ 1 to R′ 8 each independently represents a substituted or unsubstituted alkyl group having 1 to 8 carbon atoms, a substituted or unsubstituted alkenyl group, a substituted or unsubstituted aralkyl group, a substituted or unsubstituted alkynyl group, or a substituted or unsubstituted aryl group, and R′ 1 and R′ 2 , R′ 3 and R′ 4 , R′ 5 and R′ 6 , and R′ 7 and R′ 8 may each be bonded to each other to form a ring, and X′ − represents an anion;

wherein, in the general formula (3), R 9 to R 12 each independently represents an alkyl group, or a substituted or unsubstituted aryl group;

wherein, in the general formula (4), R 13 represents an alkyl group, a substituted or unsubstituted aryl group, or a substituted or unsubstituted amino group, R 14 represents a hydrogen atom, an alkyl group, a substituted or unsubstituted aryl group, or —N(—R a )R b , provided that R a and R b each independently represents a hydrogen atom, an alkyl group, or an acyl group, and may form a cyclic structure together with a nitrogen atom to which R a and R b are bonded, R 15 represents an alkyl group, R 16 represents a hydrogen atom or an alkyl group, Y represents a carbonyl group or a sulfonyl group, and n represents an integer of from 1 to 3;

wherein, in the general formula (5), R 17 and R 18 each independently represents an alkyl group or an aryl group;

wherein, in the general formula (6), R 19 and R 20 each independently represents an alkyl group or an aryl group;

wherein, in the general formula (7), R 21 to R 25 each independently represents an alkyl group or an aryl group;

wherein, in the general formula (8), R 26 and R 27 each independently represents an alkyl group, or a substituted or unsubstituted aryl group; and

wherein, in the general formula (9), R 28 to R 32 each independently represents an alkyl group or an aryl group.

2. The thermal transfer recording sheet according to claim 1 , wherein R 1 to R 8 in the general formula (1) each independently represents a substituted or unsubstituted alkyl group having 1 to 8 carbon atoms.

3. The thermal transfer recording sheet according to claim 2 , wherein R 1 to R 8 in the general formula (1) each independently represents an unsubstituted alkyl group or a cyanoalkyl group having 3 to 8 carbon atoms.

4. The thermal transfer recording sheet according to claim 1 , wherein R 1 and R 2 , R 3 and R 4 , R 5 and R 6 , and R 7 and R 8 in the general formula (1) each represents the same substituent.

5. The thermal transfer recording sheet according to claim 1 , wherein R′ 1 to R′ 8 in the general formula (2) each independently represents a substituted or unsubstituted alkyl group having 1 to 8 carbon atoms.

6. The thermal transfer recording sheet according to claim 5 , wherein R′ 1 to R′ 8 in the general formula (2) each independently represents an unsubstituted alkyl group or a cyanoalkyl group having 3 to 8 carbon atoms.

7. The thermal transfer recording sheet according to claim 1 , wherein R′ 1 and R′ 2 , R′ 3 and R′ 4 , R′ 5 and R′ 6 , and R′ 7 and R′ 8 in the general formula (2) each represents the same substituent.

8. The thermal transfer recording sheet according to claim 1 , wherein the magenta dye contains one or more compounds selected from the group consisting of compounds represented by general formulae (10) to (14):

wherein, in the general formula (10), R 33 represents an alkyl group that may contain an oxygen atom in an ether functional group, or a substituted or unsubstituted aryl group;

wherein, in the general formula (11), R 34 and R 35 each independently represents an alkyl group, or a substituted or unsubstituted aryl group;

wherein, in the general formula (12), R 36 to R 40 each independently represents an alkyl group, or a substituted or unsubstituted aryl group;

wherein, in the general formula (13), R 41 to R 44 each independently represents an alkyl group, or a substituted or unsubstituted aryl group; and

wherein, in the general formula (14), R 45 and R 46 each independently represents an alkyl group, R 47 represents a hydrogen atom, an alkyl group, or a substituted or unsubstituted aryl group, R 48 represents an alkyl group, or a substituted or unsubstituted aryl group, and R 49 represents a hydrogen atom, an alkyl group, a substituted or unsubstituted aryl group, or —N(—R 50 )R 51 , provided that R 50 and R 51 each independently represents a hydrogen atom, an alkyl group, an aryl group, or an acyl group, or represent a cyclic structure formed together with a nitrogen atom to which R 50 and R 51 are bonded.

9. The thermal transfer recording sheet according to claim 1 , wherein the yellow dye layer, the magenta dye layer, and the cyan dye layer are formed on a substrate field sequentially.

10. A thermal transfer recording sheet comprising:
a substrate;
a yellow dye layer containing a yellow dye;
a magenta dye layer containing a magenta dye;
a cyan dye layer containing a cy

Assignees

• Canon Kk

Inventors

• Katsumoto Yuko
• Shirota Koromo
• Santo Tsuyoshi
• Shintou Taichi
• Muta Hajime
• Noda Tomoyuki

Classifications

• B41M2205/30

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

• C09B67/0041

  mixtures containing one azo dye · CPC title

• B41M7/0027

  using protective coatings or layers by lamination or by fusion of the coatings or layers · CPC title

• B41M2205/06

  relating to melt (thermal) mass transfer · CPC title

• B41M2205/02

  Dye diffusion thermal transfer printing (D2T2) · CPC title