| 摘要 |
PROBLEM TO BE SOLVED: To obtain a compound thermally reacting on an imino compound to produce a coloring image excellent in image preservation by employing at least one kind of specific imino compound and a specific amine imido compound on a support. SOLUTION: An imino compound is shown by formula I, where X represents a group required for formation of an aromatic cycle or a heterocycle, Y represents O or S, and R represents an alkyl group, aryl group or aralkyl group. An amine imido compound is shown by formula II, where R<1> represents an alkyl group, aryl group, aralkyl group, alkenyl group, vinyl group or substituted vinyl group, R<2> -R<4> may be identical or different and represents an alkyl group, aryl group, aralkyl group, alkenyl group, or heterocyclic residue. Isocyanate thermally generated from the amine imido compound reacts on the imino compound for forming a coloring image. The imino compound thermally reacts on the isocyanate compound to produce a coloring substance. |
