Slipping layer for dye-donor element used in thermal dye transfer

A dye-donor element for thermal dye transfer comprising a support having on one side a dye layer and on a second side a slipping layer, wherein the slipping layer comprises a first wax comprising a polymer derived from a polyolefin and an ethylenically unsaturated carboxylic acid or ester or anhydride thereof, and at least one other wax and wherein said dye layer comprises at least a yellow dye of the following structure X:

• wherein R1 and R2 can be respectively independently selected and are a lower alkyl group which may be substituted, a lower alkenyl group which may be substituted or an aryl group which may be substituted;
• R3 and R4 can be respectively independently selected and are a lower alkyl group which may be substituted, a dialkylamino group, a —COOR5 group or a —CONR6R7 group, in which R5 is a lower alkyl group which may be substituted, a lower alkenyl group which may be substituted or an aryl group which may be substituted and R6 and R7 can be respectively independently selected and are a hydrogen atom, a lower alkyl group which may be substituted, a lower alkenyl group which may be substituted or an aryl group which may be substituted;
• or at least a yellow dye of the following structure XI:
• wherein R1 represents 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;
• R2 represents a substituted or unsubstituted alkoxy group having from 1 to 10 carbon atoms;
• a substituted or unsubstituted aryloxy group having from 6 to 10 carbon atoms;
• NHR6;
• NR6R7 or the atoms necessary to complete a 6-membered ring fused to the benzene ring;
• R3 and R4 each represents R1;
• or R3 and R4 can be joined together to form, along with the nitrogen to which they are attached, a 5- or 6-membered hetercyclic ring;
• R5 represents hydrogen;
• halogen;
• carbamoyl;
• alkoxycarbonyl;
• acyl;
• 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;
• an aryl group having from 6 to 10 carbon atoms;
• or a dialkylamino group;
• R6 and R7 each independently represents 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;
• R6 and R7 may be joined together to form, along with the nitrogen to which they are attached, a 5- or 6-membered heterocyclic ring;
• and
• Z represents hydrogen or the atoms necessary to complete a 5- or 6-membered ring;
• or at least a yellow dye of the following structure XII:
• wherein:
• R represents a substituted or unsubstituted alkyl group of from 1 to 6 carbon atoms or a substituted or unsubstituted aryl group of from 6 to 10 carbon atoms;
• R1 and R2 each independently represents hydrogen, with the proviso that only one of R1 and R2 may be hydrogen at the same time;
• a substituted or unsubstituted alkyl group of from 1 to 6 carbon atoms or a substituted or unsubstituted aryl group of from 6 to 10 carbon atoms;
• or R1 and R2 may be combined together with the nitrogen to which they are attached to form a heterocyclic ring system;
• R3 is R;
• n represents 0 or 1;
• and
• Z represents the atoms necessary to complete a 5- or 6-membered substituted or unsubstituted heterocyclic ring;
• or at least a yellow dye of the following structure XIII:
• wherein:
• R1 is an alkyl group having 1 to 8 carbon atoms or cycloalkyl group;
• R2 is a hydrogen atom, halogen atom, alkoxy group which may be substituted, alkylthio group which may be substituted or arylthio group which may be substituted;
• R3 is a branched alkyl group having 3 to 5 carbon atoms, an O— substituted oxycarbonyl group, an N-substituted aminocarbonyl group in which the N-substituted group may form a ring, or a substituted or unsubstituted heterocyclic ring having two or more hetero atoms of one or more kinds selected from the group consisting of a nitrogen atom, oxygen atom and sulfur atom;
• and
• wherein said dye donor element has reduced 2× retransfer.

A dye-donor element for thermal dye transfer comprising a support having on one side a dye layer and on a second side a slipping layer, wherein the slipping layer comprises a first wax comprising a polymer derived from a polyolefin and an ethylenically unsaturated carboxylic acid or ester or anhydride thereof, and at least one other wax and wherein said dye layer comprises at least a cyan dye of the following structure XX:

• wherein:
• R1 and R2 each independently represents hydrogen;
• an alkyl group having from 1 to 6 carbon atoms;
• a cycloalkyl group having from 5 to 7 carbon atoms;
• allyl;
• or such alkyl, cycloalkyl or allyl groups substituted with one or more groups;
• each R3 independently represents hydrogen, substituted or unsubstituted alkyl, cycloalkyl or allyl as described above for R1 and R2;
• alkoxy, aryloxy, halogen, thiocyano, acylamido, ureido, alkylsulfonamido, arylsulfonamido, alkylthio, arylthio or trifluoromethyl;
• or any two of R3 may be combined together to form a 5- or 6-membered carbocyclic or heterocyclic ring;
• or one or two of R3 may be combined with either or both of R1 and R2 to complete a 5- to 7-membered ring;
• m is an integer of from 0 to 4;
• X represents hydrogen, halogen or may be combined together with Y to represent the atoms necessary to complete a 6-membered aromatic ring to form a fused bicyclic quinoneimine;
• J represents NHCOR4, NHCO2R4, NHCONHR4 or NHSO2R4;
• and with the proviso that when X is combined with Y, then J represents CONHR4, SO2NHR4, CN, SO2R4 or SCN, in which case, however, R4 cannot be hydrogen;
• R4 is the same as R1 or represents an aryl group having from 6 to 10 carbon atoms;
• a hetaryl group having from 5 to 10 atoms;
• or such aryl or hetaryl groups substituted with one or more groups such as are listed above for R1 and R2;
• and
• Y is the same as R4, or acylamino or may be combined together with X;
• and
• wherein the dye donor element has reduced 2× retransfer.