| 摘要 |
PROBLEM TO BE SOLVED: To provide a reversible thermochromic composition having a naturally achromatizing temperature area naturally achromatizing from coloring state and a coloring retention temperature area retaining coloring state in a temperature area not higher than coloring starting temperature and particularly suitable for temperature-indicating field and a reversible thermochromic microcapsule pigment including the composition. SOLUTION: The reversible thermochromic composition comprises (1) an electron-donating coloring organic compound, (2) 4-fluoro-4'-hydroxybiphenyl as an electron-accepting compound and (3) a reactive medium deciding arising temperature of color reaction of the components (1) and (2). The reversible thermochromic microcapsule pigment includes the reversible thermochromic composition. COPYRIGHT: (C)2006,JPO&NCIPI
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