Record material utilising a vinyl carbinol or derivative thereof as a chromogenic compound
申请人:The Wiggins Teape Group Limited
公开号:EP0429239A1
公开(公告)日:1991-05-29
Pressure- or heat-sensitive record material utilises a chromogenic material of the formula (I) (Ia or Ib):
in which:
one of A₁ and A₃ is an optionally-substituted carbocyclic aryl group and the other of A₁ and A₃ is either an optionally-substituted aryl group which is the same as or different from A₁, or an optionally-substituted nitrogen-containing aromatic heterocyclic group, with the proviso that if both A₁ and A₃ are aryl groups, then at least one of A₁ and A₃ has a substituted amino or -N-heterocyclic substituent in the 4- position (relative to the bond joining A₁ or A₃ respectively to the remainder of the molecule);
A₂ is hydrogen or an optionally-substituted aryl, alkyl or aralkyl group; and
A₄ is hydrogen or an optionally-substituted alkyl, aryl or aralkyl group.
压敏或热敏记录材料采用了式 (I) (Ia 或 Ib) 的致色材料:
其中
A₁ 和 A₃ 中的一个是任选取代的碳环芳基,A₁ 和 A₃ 中的另一个是与 A₁ 相同或不同的任选取代的芳基,或任选取代的含氮芳香杂环基、但条件是,如果 A₁ 和 A₃ 都是芳基,则 A₁ 和 A₃ 中至少有一个在 4- 位(相对于分别将 A₁ 或 A₃ 与分子其余部分连接的键)具有取代的氨基或-N-杂环取代基;
A₂ 是氢或任选取代的芳基、烷基或芳烷基;以及
A₄ 是氢或任选取代的烷基、芳基或芳烷基。