Thermally-responsive record material

Details Thermally-responsive record material Thermally-responsive record material

1987-12-04

1989-04-11

Hess, Bruce H.

Record receiver having plural interactive leaves or a colorless

Having a colorless color-former, developer therefor, or...

Heavy metal reactant

427150, 427151, 428913, 503208, 503209, 503211, 503212, 503216, 503217, 503225, B41M 518

Patent

active

048206830

ABSTRACT:
An improved thermally-responsive record material having improved image retention is disclosed. The invention is an improved thermally-responsive record member, typically a sheet material, bearing a thermally-responsive color-forming composition comprising a chromogenic material, an acidic developer material, and a metal salt of a compound of the formula ##STR1## wherein R.sup.a is selected from --CH.dbd.CH, ##STR2## --(CH.sub.2).sub.4 --, --(CH.sub.2).sub.3 --, --(CH.sub.2).sub.3 --, --CH.sub.2 --CH.dbd.CH--, and --CH.sub.2 --wherein R.sub.1 is selected from hydrogen, halogen, alkyl, oxyalkyl, or NO.sub.2 with the proviso that the alkyl groups are of 1-5 carbons wherein M is a metal selected from Zn, Ca, Sn, Ni, Cu, Al, Co, and Mg.

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