Thermochromic composition and thermochromic microcapsules

A composition and thermochromic technology, applied in the direction of color-changing fluorescent materials, chemical instruments and methods, etc., can solve the problems of the temperature difference between color development temperature and achromatic temperature, and achieve large color-changing color difference, clear color-changing behavior, and high color-changing color difference. Effect
CN101970603AInactive Publication Date: 2011-02-09SAKURA COLOR PRODUCTS CORPORATION
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
SAKURA COLOR PRODUCTS CORPORATION
Publication Date
2011-02-09
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a thermochromic composition which little suffers from residual color in the faded state and exhibits relatively large color difference on color change; and a process for production of the same. The invention relates to a thermochromic composition comprising an electron-donating color-developing organic compound, an electron-accepting compound and a desensitizer which is characterized in that the desensitizer is (1) a fatty acid methyl ester having 5 or more carbon atoms in total and / or (2) a fatty acid amide having 4 or more carbon atoms in total. A thermochromic composition having a desired color-temperature hysteresis can be produced by changing the blending ratio between the desensitizers (1) and (2) in incorporating both with the other components.
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Description

technical field

[0001] The present invention relates to a thermochromic composition and thermochromic microcapsules. The invention also relates to methods of making thermochromic compositions. Background technique

[0002] The thermochromic composition undergoes reversible color development and color loss due to temperature, and can be used, for example, in printed matters, inks, paints, packaging materials, recording materials, and the like. As a representative example of such a composition, there is a composition utilizing an electron transfer reaction between an electron-donating chromogenic organic compound (electron donor) and an electron-accepting compound (electron acceptor) (Patent Document 1, Patent Document 2, etc.) .

[0003] In general, in the heating-cooling cycle, the thermochromic composition can reversibly repeat color development-color loss or color loss-color development, but usually there is a temperature difference between the color development temperat...

Claims

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