Alkyl- or aryl-amino-pyridyl- or pyrimidinyl-azo yellow dye-donor element for thermal dye transfer.

摘要

A yellow dye-donor element for thermal dye transfer comprising a plastic film support having thereon a yellow dye dispersed in a polymeric binder, the dye comprising an alkyl- or aryl-amino-pyridinyl- or pyrimidinyl-azo yellow dye which does not have any reactive pendant moiety capable of undergoing Michael-type addition. In a preferred embodiment of the invention, the dye has the formula: wherein R<1> and R<2> each independently represent a substituted or unsubstituted alkyl group having from 1 to 10 carbon atoms; a cycloalkyl group having from 5 to 7 carbon atoms or an aryl group having from 6 to 10 carbon atoms; R<3> represents hydrogen or R<1>; R<4> represents hydrogen or R<1>; R<5> represents halogen; cyano; nitro; a substituted or unsubstituted alkyl or alkoxy group having from 1 to 10 carbon atoms; a cycloalkyl group having from 5 to 7 carbon atoms; a substituted or unsubstituted aryl or aryloxy group having from 6 to 10 carbon atoms; COOR<1>; CON(R<4>)2; NHCOR<1>; NHSO2R<1>; SO2R<1>; or COR<1>; X represents N or CR<6>; R<6> represents hydrogen, halogen, cyano, CON(R<4>)2, COR<1>, CO2R<1> or R<1>; and n represents an integer from 0 to 5. o