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Twin chromophore molecule

A chromophore and molecular technology, applied in the field of twin chromophore molecules, can solve problems such as color pollution

Inactive Publication Date: 2004-07-14
EASTMAN KODAK CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In US 5,972,838, it is proposed to use a mixture of IR and visible colorants in the thermal transfer donor, but because the IR colorant absorbs the unwanted incident visible light and the two colorants have different transfer rates, this method Creates concerns about unwanted color contamination

Method used

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  • Twin chromophore molecule
  • Twin chromophore molecule
  • Twin chromophore molecule

Examples

Experimental program
Comparison scheme
Effect test

example

[0031]

[0032] Colorant 1 (λ max1 =420nm;λ max2 =864nm)

[0033]

[0034] Colorant 2 (λ max1 =540nm;λ max2 =575nm;λ max3 =858nm)

[0035]

[0036] Colorant 3 (λ max1 =477nm;λ max2 =862nm)

[0037]

[0038] Colorant 4 (λ max1 =630nm;λ max2 =864nm)

[0039]

[0040] Colorant 5 (λ max1 =380nm;λ max2 =861nm)

[0041]

[0042] Colorant 6 (λ max1 = 400nm; λ max2 =864nm)

[0043]

[0044] Colorant 7 (λ max1 = 460nm; λ max2 =863nm)

[0045]

[0046] Colorant 8 (λ max1 =530nm;λ max2 =865nm)

[0047]

[0048] Colorant 9 (λ max1 =440nm;λ max2 =863nm)

[0049]

[0050] Colorant 10 (λ max1 =530nm;λ max2 =864nm)

[0051]

[0052] Colorant 11 (λ max1 =532nm;λ max2 =861nm)

[0053]

[0054] Colorant 12 (λ max1 =610nm;λ max2 =862nm)

[0055]

[0056] Colorant 13 (λ max1 =63nm;λ max2 =861nm)

[0057]

[0058] Colorant 14 (λ max1 = 450nm; λ max2 =863nm)

[0059]

[0060] Colorant 15 (λ max1 =550nm;λ max2 =867n...

Embodiment

[0087] The IR colorant samples listed below were used as control compounds to illustrate the advantages of the present invention. These control compounds are mixtures (C-1 to C-5) of IR and image colorants (1:2 ratio) or other infrared colorants (C-6 to C-5) that substantially absorb in the visible part of the electromagnetic wave absorption range. 9). Control colorants C-6 to C-8 were obtained by the preparation methods described in US Patent 6,248,886 and US Patent 6,248,893. Colorant C-9 was prepared according to the method described in the published literature (J. Chem. Res. Synpos. (1990), (2), 50-51).

[0088]

[0089]

[0090]

[0091]

[0092] Embodiment 1--photostability

[0093] Element 1 of the invention

[0094] On a poly(ethylene terephthalate) support at 0.1 g / m 2 Apply colorant 1 at 0.5g / m 2 A cellulose acetate propionate binder was applied to prepare the element. The solvent used for coating was a 70 / 30 v / v mixture of methyl isobutyl ketone an...

Embodiment 2

[0112] Example 2 - dark stability (dark stability)

[0113] Example 1 was repeated except that the elements were placed in a dark box with constant dry air flow for periods ranging from 24 hours to 4 weeks.

[0114] Control element CE-6

[0115] This element was identical to Element 1 except that Comparative Colorant Sample C-6 was used in place of Colorant 1.

[0116] Control element CE-7

[0117] This element was identical to Element 1 except that Comparative Colorant Sample C-7 was used in place of Colorant 1.

[0118] Control element CE-8

[0119] This element was identical to Element 1 except that Comparative Colorant Sample C-8 was used in place of Colorant 1.

[0120] Control element CE-9

[0121] This element was identical to Element 1 except that Comparative Colorant Sample C-9 was used in place of Colorant 1.

[0122] All of the stains provided by the invention (stains 1 to 16) showed excellent dark stability; practically no loss in optical density was observed...

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PUM

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Abstract

The invention relates to the molecule containing a first chromophore that exhibits a first absorption maximum above 700 nm and a second chromophore that exhibits a second absorption maximum different from the first absorption maximum, wherein the absorption of the first and second chromophores are substantially independent of each other.

Description

technical field [0001] The present invention relates to molecules having a first chromophore having an absorption maximum greater than 700 nm and a separate second chromophore having an absorption maximum different from the first chromophore. Background technique [0002] In recent years, there has been a strong demand for compounds that absorb in the infrared region of the electromagnetic spectrum in various high-tech applications. For example, these materials can be used in laser thermal printing systems where the donor sheet includes IR colorants that strongly absorb the laser wavelength. When the donor is irradiated, this absorbing material converts the light energy into thermal energy and transfers the heat to the immediately adjacent colorant, thereby heating the colorant to an evaporation temperature for transfer to the acceptor. Since local temperatures can be as high as 600°C, infrared colorants tend to migrate to some extent. As a result, some unwanted color cont...

Claims

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Application Information

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IPC IPC(8): B41M5/46C09B23/00C09B23/02C09B55/00C09B56/16C09B67/46C09D11/00
CPCC09D11/50B41M5/465C09B56/16C09B23/02
Inventor R·王A·L·卡罗尔-李K·W·威廉斯L·A·卡斯楚克C·H·魏德纳
Owner EASTMAN KODAK CO
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