申请人:Kanzaki Paper Manufacturing Co., Ltd.
公开号:US04633277A1
公开(公告)日:1986-12-30
This invention provides a heat-sensitive recording material comprising a base sheet and a heat-sensitive record layer formed over the base sheet and comprising a colorless or pale-colored basic dye and a color developing material capable of forming a color when contacted with the dye, the recording material being characterized in that the heat-sensitive record layer comprises as the color developing material at least one compound represented by the formula ##STR1## wherein X is straight- or branched-chain alkylene group having 1 to 4 carbon atoms, R.sub.1, R.sub.2, R.sub.3, R.sub.4 and R.sub.5 are each hydrogen atom, halogen atom, alkyl group having 1 to 4 carbon atoms, alkoxy group having 1 to 4 carbon atoms, phenyl group or benzyl group, or R.sub.1 and R.sub.2 R.sub.2 and R.sub.3, and R.sub.4 and R.sub.5, when taken together, may form an aromatic ring, and when R.sub.4 and R.sub.5 taken together form an aromatic ring, the hydroxy group on the benzene ring to which R.sub.4 and R.sub.5 are attached may be substituted on the aromatic ring formed by R.sub.4 and R.sub.5.
这项发明提供了一种热敏记录材料,包括一张基材和形成在基材上的热敏记录层,该层包括一种无色或淡色的碱性染料和一种颜色发展材料,当与染料接触时能够形成颜色。该记录材料的特点在于,热敏记录层包括至少一种由以下公式表示的化合物作为颜色发展材料:##STR1## 其中,X是1至4个碳原子的直链或支链烷基,R1、R2、R3、R4和R5分别是氢原子、卤素原子、1至4个碳原子的烷基、1至4个碳原子的烷氧基、苯基或苄基,或者当R1和R2、R2和R3、以及R4和R5在一起时,可以形成芳环,当R4和R5在一起形成芳环时,R4和R5所连接的苯环上的羟基可以在由R4和R5形成的芳环上被取代。