Reversible recording medium and exterior member

Patent metadata

Field	Value
Publication number	US-12077009-B2
Application number	US-201917256896-A
Country	US
Kind code	B2
Filing date	May 29, 2019
Priority date	Jun 29, 2018
Publication date	Sep 3, 2024
Grant date	Sep 3, 2024

Abstract

A reversible recording medium according to an embodiment of the present disclosure includes: a recording layer including a coloring compound having an electron-donating property, a color developing/quenching agent having an electron-accepting property, a photothermal conversion agent, and a macromolecular material; and an ultraviolet absorbing layer provided on the recording layer, the macromolecular material including an organic material that has solubility of 20 wt % or more and 80 wt % or less at 25° C. or less and contains 0.5 wt % or less of chlorine atoms, fluorine atoms, and sulfur atoms in a molecule.

First claim

The invention claimed is:

1. A reversible recording medium comprising:
a recording layer including a coloring compound having an electron-donating property, a color developing/quenching agent having an electron-accepting property, a photothermal conversion agent, and a macromolecular material;
an oxygen barrier layer on the recording layer, wherein the oxygen barrier layer includes silicon oxide, aluminum oxide or magnesium oxide; and
an ultraviolet absorbing layer provided on the recording layer,
the macromolecular material including an organic material that has solubility of 20 wt % or more and 80 wt % or less at 25° C. or less and includes 0.5 wt % of chlorine atoms in a molecule.

2. The reversible recording medium according to claim 1 , wherein the organic material does not release an acid having an acid dissociation constant (pKa) of 3.77 or less.

3. The reversible recording medium according to claim 1 , wherein the macromolecular material includes at least one of polystyrene, polycarbonate, polyacrylonitrile, polyvinyl acetate, polyvinyl alcohol, or polymethylmethacrylate.

4. The reversible recording medium according to claim 1 , wherein the macromolecular material includes carbon, hydrogen, and oxygen.

5. The reversible recording medium according to claim 1 , wherein the macromolecular material includes carbon, hydrogen, oxygen, and nitrogen.

6. The reversible recording medium according to claim 1 , wherein the organic material having solubility of 20 wt % or more in cyclohexanone at 25° C. or less.

7. The reversible recording medium according to claim 1 , wherein the organic material having solubility of 20 wt % or more in 2-butanone at 25° C. or less.

8. The reversible recording medium according to claim 1 , wherein the organic material having solubility of 20 wt % or more in toluene at 25° C. or less.

9. The reversible recording medium according to claim 1 , further comprising a layer including a pressure-sensitive adhesive or an adhesive on a surface of the recording layer opposite to a surface provided with the ultraviolet absorbing layer.

10. The reversible recording medium according to claim 1 , wherein the recording layer includes, as the color developing/quenching agent, at least one compound represented by the following general formula (1):

X is one of —NHCO—, —CONH—, —NHCONH—, —CONHCO—, —NHNHCO—, —CONHNH—, —CONHNHCO—, —NHCOCONH—, —NHCONHCO—, —CONHCONH—, —NHNHCONH—, —NHCONHNH—, —CONHNHCONH—, —NHCONHNHCO—, and —CONHNHCONH—, and R is a linear hydrocarbon group having 25 to 34 carbon atoms.

11. The reversible recording medium according to claim 1 , wherein the recording layer includes a plurality of layers.

12. The reversible recording medium according to claim 11 , wherein
the recording layer includes a first layer and a second layer as the plurality of layers, and
the first layer and the second layer include respective photothermal conversion agents having absorption wavelengths different from each other.

13. The reversible recording medium according to claim 1 , wherein the macromolecular material includes polyvinyl acetate and polyvinyl chloride-polyvinyl acetate copolymer.

14. An exterior member comprising a support base and a reversible recording medium on at least one surface of the support base, wherein
the reversible recording medium comprising:
a recording layer including a coloring compound having an electron-donating property, a color developing/quenching agent having an electron-accepting property, a photothermal conversion agent, and a macromolecular material;
an oxygen barrier layer on the recording layer, wherein the oxygen barrier layer includes silicon oxide, aluminum oxide or magnesium oxide; and
an ultraviolet absorbing layer provided on the recording layer,
the macromolecular material including an organic material that has solubility of 20 wt % or more and 80 wt % or less at 25° C. or less and includes 0.5 wt % of chlorine atoms in a molecule.

15. The reversible recording medium according to claim 14 , wherein the macromolecular material includes polyvinyl acetate and polyvinyl chloride-polyvinyl acetate copolymer.

Assignees

• Sony Corp

Inventors

• Shuto Aya
• Kaino Yuriko

Classifications

• B41M5/34

  Multicolour thermography · CPC title

• B41M5/3375

  Non-macromolecular compounds · CPC title

• B41M2205/04

  Direct thermal recording [DTR] · CPC title

• B41M2205/42

  Multiple imaging layers · CPC title

• B41M2205/40

  Cover layers; Layers separated from substrate by imaging layer; Protective layers; Layers applied before imaging · CPC title