| abstract |
Pyridone colorants of formula (I) in which X is CH or nitrogen, R1 is possibly substituted C¿1?-C20 alkyl or possibly substituted phenyl, R?2¿ is a carbocyclic or heterocyclic radical, R3 is hydrogen or C¿1?-C4 alkyl, R?4¿ is hydrogen or C¿1?-C4 alkyl, R?5¿ is possibly substituted C¿1?-C8 alkyl or possibly substituted phenyl and R?6¿ is cyano, carbamoyl, carboxyl, C¿1?-C4 alkoxy carbonyl or C1-C4 alkanoyl, a process for the thermal transfer of said colorants and their use to dye or print synthetic materials. |