NN'- NN'-DIARYLUREA DERIVATIVE MANUFACTURING METHOD THEREOF AND THERMOSENSITIVE RECORDING MATERIAL USING SAME

摘要

The present invention is an N,N''-diaryl urea derivative represented by the following general formula (1) and a method for producing the same. Further, the present invention provides a heat-sensitive recording material comprising on a support a heat-sensitive recording layer comprising a colorless or pale basic dye at room temperature and a developer capable of displaying color by contact with the basic dye by heating, wherein the developer is An N,N''-diaryl urea derivative represented by the following general formula (1) (wherein R 2 is an alkyl group, an aralkyl group or an aryl group, and A 1 is a hydrogen atom or an alkyl group).