| 摘要 |
<p>A heat sensitive recording material comprising a recording layer formed on a substrate and containing at least one colourless or light coloured colour former and at least one colour developer, the material being characterised in that the recording material gives a blue image, and the colour developer being at least one compound represented by the formula (1) wherein R1 is unsubstituted or substituted phenyl, naphthyl or C1 C20alkyl, X is a group of the formula (a), (b), or (c), A is unsubstituted or substituted phenylene, naphthylene or C1 C12alkylene, or is an unsubstituted or substituted heterocyclic group, B is a linking group of formula: O SO2 , SO2 O , NH SO2 , SO2 NH , S SO2 , O CO , O CO NH , NH CO , NH CO O , S CO NH , S CS NH , CO NH SO2 , O CO NH SO2 , NH=CH , CO NH CO , S , CO , O , SO2 NH CO , O CO O and O PO (OR2)2, and R2 is unsubstituted or substituted or aryl benzyl or C1 C20alkyl, with the proviso, that, it B is not a linking group of formula O SO2 , R2 is unsubstituted or substituted phenyl, napthtyl or C1 C8alkyl.</p> |
