HETERO-POLYCYCLIC COMPOUNDS, AND COLORING MATTERS, PIGMENTS, DYES, COLOR-CHANGING MATERIAL COMPOSITIONS, AND COLOR-CHANGING FILMS, MADE BY USING THE COMPOUNDS
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United States of America Patent
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app pub date -
Aug 1, 2008
filing date -
Feb 14, 2003
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Abstract
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.
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