| abstract |
Abstract of the Disclosure: Pyridone dyes useful for thermal transfer have the formula (I) where R1 is hydrogen or C1-C4-alkyl, R2 and R3 are identical or different and each is, independently of the other, hydrogen, substituted or unsubstituted C1-C12-alkyl, C5-C7-cycloalkyl, sub-stituted or unsubstituted phenyl, substituted or unsubstituted pyridyl, substituted or unsubstituted C1-C12-alkanoyl, C1-C12-alkoxycarbonyl, substituted or unsubstituted C1-C12-alkylsulfonyl, C5-C7-cycloalkyl-sulfonyl, substituted or unsubstituted phenyl-sulfonyl, substituted or unsubstituted pyridyl-sulfonyl, substituted or unsubstituted benzoyl, pyridylcarbonyl or thienylcarbonyl or are together with the nitrogen atom to which they are bonded unsubstituted or C1-C4-alkyl-substituted succinimido, unsubstituted or C1-C4-alkyl-substituted phthalimido or a five- or six-membered saturated heterocyclic radical which may contain further hetero atoms, X is CH or nitrogen, Y is cyano or a radical of the formula CO-W, CO-OW or CO-NHW where W is hydrogen, C1-C8-alkyl which may be substituted and which may be interrupted by one or two oxygen atoms in ether function, C5-C7-cycloalkyl, phenyl or tolyl, and Z is an aromatic carbocyclic or heterocyclic radical. |