申请人:Fuji Photo Film Co., Ltd.
公开号:US05486446A1
公开(公告)日:1996-01-23
A multi-color heat-sensitive recording material is disclosed which comprises a support having laminated thereon in the following order a first heat-sensitive color forming layer comprising mainly an electron donating dye precursor and an electron accepting compound, a second heat-sensitive color forming layer containing a diazonium salt compound having a maximum absorption wavelength of 360.+-.20 nm and a coupler capable of reacting with the diazonium salt compound by heating to form color and a third heat-sensitive color forming layer containing a diazonium salt compound represented by formula (I) having a maximum absorption wavelength of 400.+-.20 nm and a coupler represented by formula (II) capable of reacting with the diazonium salt compound by heating to form color: ##STR1## wherein R.sub.1 and R.sub.2 each represents an alkyl group, an aralkyl group or an aryl group; Y represents a halogen atom, an acyl group, an alkoxycarbonyl group or a sulfamoyl group; and X.sub.1.sup.- represents a counter anion: ##STR2## wherein R.sub.3 represents an alkyl group or an aryl group; R.sub.4 represents an alkyl group, an aryl group or an aralkyl group; R.sub.5 represents an alkyl group, an alkoxy group, an aryloxy group, an aralkyloxy group, an alkylthio group, an arylthio group, an aralkylthio group or a halogen atom; and n represents 0 or an integer of 1 to 4.
本发明公开了一种多彩热敏记录材料,其包括支撑体,该支撑体上依次层压有第一热敏成色层,该层主要包括电子给体染料前体和电子受体化合物;第二热敏成色层,该层含有最大吸收波长为360±20nm的重氮盐化合物和能够通过加热与重氮盐化合物反应形成颜色的偶联剂;以及第三热敏成色层,该层含有由式(I)表示的最大吸收波长为400±20nm的重氮盐化合物和由式(II)表示的能够通过加热与重氮盐化合物反应形成颜色的偶联剂:其中R1和R2分别表示烷基、芳基烷基或芳基基团;Y表示卤素原子、酰基、烷氧羰基或磺酰基;X1-表示计数阴离子:其中R3表示烷基或芳基基团;R4表示烷基、芳基或芳基烷基;R5表示烷基、烷氧基、芳氧基、芳基烷氧基、烷硫基、芳硫基、芳基烷硫基或卤素原子;n表示0或1至4的整数。