| abstract |
The invention relates to a heat-sensitive recording material comprising a carrier substrate and a heat-sensitive color-forming layer containing at least one color former and at least one phenol-free color developer, characterized in that the at least one color developer comprises a compound of the formula (I) where Ar is an aryl radical, a heteroaryl radical or a benzyl radical and Y is an aryl radical, a heteroaryl radical, a benzyl radical, an aryloxy radical, a heteroaryloxy radical, a benzyloxy radical, an arylamino radical, a heteroarylamino radical or a benzylamino radical, and a process for its preparation. |