专利名称：Yellow color-formers
发明人：Loren D. Albin,Martha Jacobsen,David B.
Olson
申请号：US07/545551申请日：19900629公开号：US05376451A公开日：19941227
摘要：This invention relates to improved imaging systems based on the formation ofyellow colored coordination compounds of transition metals with certain ligands. Thesecoordination compounds have been found to provide excellent yellow colors when usedin pressure sensitive carbonless copy-papers wherein the image is formed by the reactionof a color-forming compound with transition metal salts such as those of nickel, cobalt,iron, copper, and similar materials. These yellow color- formers have the advantage ofhigh solubility in encapsulation solvents and have less color on Zn.sup.2+ containing CBsheets. Use of these yellow color-formers with other metal complex color-formers suchas N- (monosubstituted)dithiooxamide color-formers and N,N'-(disubstituted)dithiooxamides results in the formation of black images.
申请人：MINNESOTA MINING AND MANUFACTURING COMPANY
代理人：Gary L. Griswold,Walter N. Kirn,Gregory A. Evearitt
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