Stabilizer for electron doner-acceptor carbonless copying system

Details Stabilizer for electron doner-acceptor carbonless copying system Stabilizer for electron doner-acceptor carbonless copying system

1981-03-30

1983-02-08

Hess, Bruce H.

Textiles: manufacturing

106 21, 106308N, 252351, 400204, 400237, 4002412, 428194, 4283204, 4283206, 4283208, 428537, 428913, 428914, B41M 514, B41M 516, B41M 522, C09D 1100

Patent

active

043725821

ABSTRACT:
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 black colored product.

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