Coloring compound and thermal transfer recording sheet

Patent metadata

Field	Value
Publication number	US-10501631-B2
Application number	US-201815897076-A
Country	US
Kind code	B2
Filing date	Feb 14, 2018
Priority date	Feb 17, 2017
Publication date	Dec 10, 2019
Grant date	Dec 10, 2019

Abstract

A thermal transfer recording sheet includes a base material and, on the base material, 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. The yellow dye and the cyan dye contain compounds having specific structures.

First claim

What is claimed is:

1. A coloring compound having a structure represented by Formula (1):

wherein R 1 represents an alkyl group,
R 2 represents an alkyl group,
R 1 and R 2 are the same alkyl groups,
R 3 represents an alkyl group, an unsubstituted aryl group, an aryl group having a substituent, or an amino group,
R 4 represents a hydrogen atom, an alkyl group, or an alkoxy group, and
X represents a carbonyl group or a sulfonyl group.

2. A thermal transfer recording sheet comprising a base material and a coloring-material layer on the base material, wherein
the coloring-material layer includes 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,
the yellow dye contains at least one compound selected from compounds having a structure represented by Formula (1) or a structure represented by Formula (2), and
the cyan dye contains at least one compound selected from compounds having a structure represented by Formula (3) or a structure represented by Formula (4):

wherein R 1 represents an alkyl group,
R 2 represents a hydrogen atom or an alkyl group,
R 3 represents an alkyl group, an unsubstituted aryl group, an aryl group having a substituent, or an amino group,
R 4 represents a hydrogen atom, an alkyl group, or an alkoxy group, and
X represents a carbonyl group or a sulfonyl group,

wherein R 5 represents an alkyl group,
R 6 represents a hydrogen atom or an alkyl group,
R 7 and R 8 each independently represent an alkyl group, and
Y represents a carbonyl group or a sulfonyl group,

wherein R 9 and R 19 each independently represent an alkyl group, an unsubstituted aryl group. or an aryl group having a substituent, and

wherein R 11 to R 15 each independently represent an alkyl group, an unsubstituted aryl group, or an aryl group having a substituent.

Assignees

• Canon Kk

Inventors

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

Classifications

• B41M2205/02

  Dye diffusion thermal transfer printing (D2T2) · CPC title

• B41M2205/30

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

• C09B29/3626 Primary

  from a pyridine ring containing one or more hydroxyl groups (or = O) · CPC title

• C07C311/39

  having the nitrogen atom of at least one of the sulfonamide groups bound to hydrogen atoms or to an acyclic carbon atom · CPC title

• C09B29/363

  from diazotized amino carbocyclic rings · CPC title