| 摘要 |
PROBLEM TO BE SOLVED: To obtain excellent image preservabioity and coloring sensitivity by the use of an isocyanate compound and an aromatic compound having an electron donating dye precursor and a specific constitutional formula. SOLUTION: The thermosensitive agent includes an isocyanate compound and an aromatic compound having an achromatic or hypochromic electron donating dye precursor. Also, the isocyanate compound is an isocyanate adduct body compound having a melting point of 40% or higher. In the formula, Y shows any of -SO2 -, -(S)q -, -CO-, -CH(C6 H5 )-, -C(CH3 )2 -, -COCO-, CO3 -,- COCH2 CO-,-NH-, or a case of no presence thereof. (q) is an integer 1 or 2. In addition, the hydrogen atom of a benzene ring can be substituted by a halogen atom, an aromatic compound residue an aliphatic compound residue or a heterocyclic compound residue. |
