申请人:MINNESOTA MINING AND MANUFACTURING COMPANY
公开号:EP0062467A2
公开(公告)日:1982-10-13
A stabilizing agent for use in electron donor-acceptor carbonless copying systems. The stabilizing agent is 2,2'-methylene-bis(4-methyl-6-t-butyl phenol). Systems in which the stabilizing agent is useful comprise a color-forming composition comprising at least one leuco dye which is fadeable or discolorable after development, a color-developing composition comprising an acidic coreactant material capable of reacting with the color-forming composition to provide colored products, and the stabilizing agent. The stabilizing agent prevents discoloration or fade of images produced by reaction of the color-forming composition with the color-developing composition. In a preferred embodiment, the color-forming composition additionally comprises dithiooxamide and/or dithiooxamide derivatives, the color-developing composition additionally comprises a transition metal ion capable of reacting with the dithiooxamide compound to produce a purple-colored product, and the reaction of the color-forming composition with the color-developing composition results in a neutral balclack colored product.
一种用于电子供体-受体无碳复印系统的稳定剂。稳定剂为 2,2'-亚甲基-双(4-甲基-6-叔丁基苯酚)。使用该稳定剂的系统包括一种成色组合物,其中含有至少一种在显影后可褪色或变色的白兰地染料;一种显色组合物,其中含有一种能与成色组合物反应以提供有色产品的酸性核心活性物质;以及稳定剂。稳定剂可防止成色组合物与显色组合物反应生成的图像变色或褪色。在一个优选的实施方案中,成色组合物还包括二硫代草酰氨和/或二硫代草酰氨衍生物,显色组合物还包括能与二硫代草酰氨化合物反应生成紫色产品的过渡金属离子,成色组合物与显色组合物反应生成中性琥珀色产品。