Heat-sensitive recording materials and phenol compounds

摘要

Heat-sensitive recording materials contain an electron-donating chromogenic compound and an electron-attracting compound. The recording materials also contain at least one compound represented by the following formula: <IMAGE> wherein R1 and R3 mean a hydrogen atom or an alkyl, aralkyl or aryl group, R2 and R4 denote an alkyl, alkenyl, aralkyl or aryl group, X1, X2, Y1 and Y2 stand for an oxygen or a sulfur atom, and -Z1- and -Z2- are a specific aromatic group. Also provided are phenol compounds represented by the following formula: <IMAGE> wherein R1, R2, X1 and Y1 have the same meanings as defined above; R5 and R6 are a hydrogen or halogen atom or an alkyl, alkoxy, aralkyl, aryl or hydroxyl group; p and q stand for an integer of 1-4; R5 and R6 may be either the same or different when p and q represent an integer of 2 or greater; and -Z3- means a specific divalent group.