| 摘要 |
PURPOSE:To obtain a pressure- or heat-sensitive recording paper having excellent light resistance and excellent water resistance by using a specific fluoran derivative as an electron donative chromogenic substance for the pressure- or heat-sensitive recording paper. CONSTITUTION:One or two or more of fluoran derivatives of the formula I(where R<1> is an alkyl, cycloalkyl, a C8-C10 alkoxyalkyl or aryloxyalkyl, a C2-C8 alkenyl, aralkyl, or heterocyclic alkyl, and X is a halogen) are used, together with other chromogenic substances as needed, to manufacture a pressure- or heat-sensitive recording paper. The fluoran derivatives of the formulaIare obtained by dehydrocondensation of a compound of the formula II or III (where R is H or a C1-C4 alkyl). |
