Patent ID: 6187502
Filing Date: 2001-02-13
Classification: B41M,Y10S

Abstract:
A colorant-donor element for laser thermal transfer comprising a support having thereon a colorant layer comprising a colorant dispersed in a binder, said colorant layer having associated therewith an infrared-absorbing cyanine colorant having at least two sulfonic acid groups, said cyanine colorant having the following formula: ##STR7##wherein:each W independently represents the atoms necessary to form an optional 6-membered aromatic ring;each X independently represents sulfur or C(CH.sub.3).sub.2 ;each Y independently represents an alkylene group having from about 2 to about 5 carbon atoms:Z is chlorine or an alkylsulfonyl group having from 1 to about 4 carbon atoms; andeach R independently represents an alkyl group having from 1 to about 6 carbon atoms; andsaid colorant layer also containing a stabilizer comprising a phenoxy resin, a copolymer of vinyl chloride/vinyl acetate/maleic anhydride or a copolymer of styrene/4-vinylpyridine.