| 摘要 |
A thermally sensitive recording medium comprises on substrate, a recording layer comprising: (a) a colourless or pale coloured dye precursor; (b) a colour developer which can react with the dye precursor to develop a colour and which includes at least one compound of formula (1) <CHEM> wherein X is oxygen or sulphur, and R is a group selected from phenyl, naphthyl, aralkyl, C1-C6 alkyl, C3-C6 cycloalkyl and C2-C6 alkenyl, which group is unsubstituted or substituted, Z is C1-C6 alkyl or an electron attracting group, n is 0 or an integer from 1 to 4, and p is an integer from 1 to 5 provided that n + p ≤ 5; and (c) at least one methylolated fatty acid amide of formula (2): R1 - CONHCH2OH wherein R1 is C11-C21 alkyl |
