Heat transferable material for improved image stability

A heat transferable overcoat material comprising:

• crosslinked elastomeric organic beads;
• a light stabilizer that is an N-oxyl radical derived from a hindered amine, the N-oxyl radical having the following formula (A) or formula (B):
• wherein R1, R2, R5, and R6 are each independently selected from a straight or branched C1-C6 alkyl or alkene, R3 and R4 are each independently selected from H, CH2CH3, CH3, OH, OR, COOH, COOR, or NH—C(═O)R, R is a straight or branched C1-C6 alkyl or alkene at least one of R3 and R4 is not hydrogen, and the N-oxyl radical has a molecular weight of 600 or less;
• at least one styrene/allyl alcohol copolymer resin;
• a UV absorbing material;
• and at least one poly(vinyl acetal) resin having the following Formula I:
• wherein n is from 10 to 100, the heat transferable overcoat material comprising 40% to 90% by weight of the at least one poly(vinyl acetal) resin and 2% to 20% by weight of the UV absorbing material, based on the total dry weight of the heat transferable material.

A thermal transfer assemblage comprising a receiver element in contact with at least a portion of a heat transferable donor element, wherein the donor element comprises a polymeric support, at least one portion thereof coated with a heat transferable overcoat material comprising:

• crosslinked elastomeric organic beads;
• a light stabilizer that is an N-oxyl radical derived from a hindered amine, the N-oxyl radical having the following formula (A) or formula (B):
• wherein R1, R2, R5, and R6 are each independently selected from a straight or branched C1-C6 alkyl or alkene, R3 and R4 are each independently selected from H, CH2CH3, CH3, OH, OR, COOH, COOR, or NH—C(═O)R, R is a straight or branched C1-C6 alkyl or alkene, at least one of R3 and R4 is not hydrogen, and the N-oxyl radical has a molecular weight of 600 or less;
• at least one styrene/allyl alcohol copolymer resin;
• a UV absorbing material;
• and at least one poly(vinyl acetal) resin having the following Formula I:
• wherein n is from 10 to 100, the heat transferable overcoat material comprising 40% to 90% by weight of the at least one poly(vinyl acetal) resin and 2% to 20% by weight of the UV absorbing material, based on the total dry weight of the heat transferable material.