| abstract |
The invention relates to a heat-sensitive recording material comprising a carrier substrate and a heat-sensitive color-forming layer comprising at least one color former and at least one phenol-free color developer, characterized in that the at least one color developer is the compound of the formula (A) in which Ar is an unsubstituted or substituted phenyl or naphthyl radical, A is unsubstituted or substituted phenyl, naphthyl, pyridyl, thiazolyl or benzothiazolyl radical and n is 1 or 2. |