Heat sensitive transfer recording sheet

Patent metadata

Field	Value
Publication number	US-11801703-B2
Application number	US-202016909828-A
Country	US
Kind code	B2
Filing date	Jun 23, 2020
Priority date	Jun 27, 2019
Publication date	Oct 31, 2023
Grant date	Oct 31, 2023

Abstract

A heat sensitive transfer sheet that achieves high optical density and high light resistance without generating scumming. The heat sensitive sheet has a base material and a coloring material layer formed on the base material, and the coloring material layer includes a compound represented by the following formula (1) and a particular dye compound:whereinR11 and R13 each independently represent a hydrogen atom, an alkyl group, an aralkyl group, an unsubstituted aryl group or an aryl group having a substituent; andR12 and R14 to R18 each independently represent a hydrogen atom or an alkyl group.

First claim

What is claimed is:

1. A heat sensitive transfer recording sheet, having
a base material and a coloring material layer formed on the base material,
wherein the coloring material layer comprises a compound (1-3), and any one compound selected from the compound group consisting of compound (2-21), a compound (2-24), a compound (3-2), a compound (3-5), a compound (4-16), and a compound (4-20):

2. The heat sensitive transfer recording sheet according to claim 1 , wherein a content of the compound (1-3) in the coloring material layer and a content of any one compound selected from the compound group consisting of the compound (2-21), the compound (2-24), the compound (3-2), (3-5), the compound (4-16), and the compound (4-20) satisfy the following relationship based on the mass:
the compound (1-3)/(any one compound selected from the compound group consisting of the compound (2-21), the compound (2-24), the compound (3-2), the compound (3-5), the compound (4-16), and the compound (4-20)=1 to 2.

3. The heat sensitive transfer recording sheet according to claim 1 , wherein
the coloring material layer comprises a binder resin; and
the content of the compound (1-3) is 1 part by mass or more and 40 parts by mass or less based on 100 parts by mass of the binder resin.

4. The heat sensitive transfer recording sheet according to claim 1 , wherein
the coloring material layer comprises a binder resin; and
the content of any one compound selected from the compound group consisting of the compound (2-21), the compound (2-24), the compound (3-2), the compound (3-5), the compound (4-16), and the compound (4-20) is 1 part by mass or more and 20 parts by mass or less based on 100 parts by mass of the binder resin.

Assignees

• Canon Kk

Inventors

• Sekiguchi Takeshi
• Kitao Akiko
• Hayakawa Ai

Classifications

• B41M5/392 Primary

  Additives, other than colour forming substances, dyes or pigments, e.g. sensitisers, transfer promoting agents · CPC title

• B41M5/388

  Azo dyes · CPC title

• B41M5/3854

  Dyes containing one or more acyclic carbon-to-carbon double bonds, e.g., di- or tri-cyanovinyl, methine · CPC title

• B41M2205/06

  relating to melt (thermal) mass transfer · CPC title

• B41M2205/30

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