申请人:Minnesota Mining and Manufacturing Company
公开号:US05426085A1
公开(公告)日:1995-06-20
This invention relates to improved imaging systems based on the formation of yellow colored coordination compounds of transition metals with certain ligands. These coordination compounds have been found to provide excellent yellow colors when used in pressure sensitive carbonless copy-papers wherein the image is formed by the reaction of 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 of high solubility in encapsulation solvents and have less color on Zn.sup.2+ containing CB sheets. Use of these yellow color-formers with other metal complex color-formers such as N-(monosubstituted)dithiooxamide color-formers and N,N'-(disubstituted)dithiooxamides results in the formation of black images.
本发明涉及基于过渡金属与某些配体形成黄色配合物的改进成像系统。已经发现,当这些配合物在压敏无碳复写纸中与镍、钴、铁、铜等过渡金属盐类反应形成图像时,它们提供了优异的黄色。这些黄色色发生剂具有在封装溶剂中高溶解度的优点,并且在含Zn.sup.2+的CB纸上颜色较少。将这些黄色色发生剂与其他金属配合物色发生剂(如N-(单取代)二硫代草酰胺色发生剂和N,N'-(双取代)二硫代草酰胺)一起使用,可以形成黑色图像。