申请人:MITSUI TOATSU CHEMICALS, Inc.
公开号:EP0524419A1
公开(公告)日:1993-01-27
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:
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:
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.
热敏记录材料含有一种电子供体变色化合物和一种电子吸引化合物。记录材料还含有至少一种由下式表示的化合物:
其中 R₁ 和 R₃ 表示氢原子或烷基、芳基或芳基,R₂ 和 R₄ 表示烷基、烯基、芳基或芳基,X₁、X₂、Y₁ 和 Y₂ 表示氧原子或硫原子,-Z₁- 和 -Z₂- 是特定的芳香基团。还提供由下式表示的苯酚化合物:
其中 R₁、R₂、X₁ 和 Y₁ 的含义与上述定义相同;R₅ 和 R₆ 是氢原子或卤素原子或烷基、烷氧基、芳基、芳基或羟基;p 和 q 代表 1-4 的整数;当 p 和 q 代表 2 或更大的整数时,R₅ 和 R₆ 可以相同或不同;以及 -Z₃- 指特定的二价基团。