| 摘要 |
PURPOSE:To obtain a developer effective for forming a developed color image excellent in long-term stability by reacting arylsulfonylcarbamic ester having a specific structure and a polyvalent amino compd. having two or more amino groups and adding arylsulfonylisocyanate to the reaction system immediately before the completion of the reaction. CONSTITUTION:A compd. having two or more arylsulfonylaminocarbonylamino groups represented by formula I (wherein R1 is an aromatic group substituted by at least one member selected from a non-substituted aromatic group, a lower alkyl group and a halogen atom) in one molecule thereof is synthesized by reacting arylsulfonylcarbamic ester represented by formula II (wherein R1 is the same group as mentioned above and R2 is a lower alkyl group, a benzyl group or a phenyl group) and an amino compd. having two or more amino groups and adding arylsulfonylisocyanate represented by formula III (wherein R1 is the same group as mentioned above) to the reaction system immediately before the completion of reaction. |
