Idemitsu Kosan Company, Limited

Kochi University

Techno Network Shikoku Co., Ltd.

Yousuke Ooyama

Katsuhira Yoshida

Satoshi Hachiya

Provided are novel hetero-polycyclic compounds having a specific structure, color-changing material compositions comprising (A) a fluorescent coloring matter comprising at least one of the hetero-polycyclic compounds described above and (B) a binder material, color-changing films comprising the above hetero-polycyclic compounds, coloring matters comprising the above hetero-polycyclic compounds, and pigments or dyes comprising the hetero-polycyclic compounds described above, and provided are color-changing material compositions which are not deteriorated in a color-changing performance even after used for long time and which are prevented from being unusable due to deposition of coloring matters during storage and color-changing films produced by using the same, and novel hetero-polycyclic compounds, coloring matters and pigments or dyes which actualize them.

Hetero-polycyclic compounds, and coloring matters, pigments, dyes, color-changing material compositions, and color-changing films, made by using the compounds

The present invention provides heteropolycyclic compounds represented by General Formulae (1) and (2): wherein Ris a straight- or branched-chain C-Calkyl group or the like; Rand Rare the same or different and are each a straight- or branched-chain C-Calkyl group or the like; Rand Rare each a hydrogen atom; X is &#x2014;OH or the like; X' is a straight- or branched-chain C-Calkyl group or the like; and Z is &#x2014;O&#x2014; or the like. The heteropolycyclic compounds of the present invention have appropriate optical absorption wavelengths and fluorescence wavelengths and a high luminescence intensity, and can be advantageously used in various applications as colorants that have excellent performance in terms of heat resistance, light resistance, solubility, dispersibility in resist materials, solid luminescence, etc.

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Kochi, Japan

Yousuke Ooyama