| 摘要 |
PURPOSE:To obtain a base precursor, consisting of a specific compound, capable of readily and rapidly releasing a base by heating, useful as a heat developing type recording material and having high hydrophobicity and preservation stability. CONSTITUTION:A base precursor consisting of a compound expressed by formula I [R<1> is H, (substituted)alkyl, (substituted)cycloalkyl, (substituted)alkenyl, etc.; X is O or S; B is a monovalent group corresponding to an atomic group obtained by removing H linked to the N atom from an organic base, e.g. primary, secondary amine, etc.]. The above-mentioned precursor is capable of preventing contact with constituent components of a recording material caused by dissolution of the base precursor in a coating solution in producing the recording material since hydrophobicity is enhanced. An organic base converted into (B) in formula I is particularly has a compound expressed by formula II [at least one of R<21>-R<23> is H, (substituted)alkyl, (substituted)cycloalkyl, etc.; R<24> is H, (substituted)amino, etc.]. |
