Thermally-responsive record material

Details Thermally-responsive record material Thermally-responsive record material

1987-09-03

1988-12-27

Hess, Bruce H.

Record receiver having plural interactive leaves or a colorless

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

Having nonchromogenic liquid spread-control or...

427150, 427151, 428500, 428913, 503208, 503214, 503216, 503221, B41M 518

Patent

active

047941022

ABSTRACT:
A high sensitivity thermal paper resistant to image erasure is disclosed. The thermal paper has a color-forming composition comprising a chromogenic material, an acidic developer material, a water insoluble polymer consisting of poly .alpha.-methylstyrene or .alpha.-methylstyrene/vinyltoluene copolymer, and a thermal modifier. Preferably the thermal modifier is selected from acetoacet-o-toluidine, diphenoxyethane, phenyl-1-hydroxy-2-naphthoate, diheptadecyl ketone and octadecanamide. The disclosed composition when thermally imaged is surprisingly resistant to image erasure and smearing attributable to fingerprint oils.

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