Sensitizer for heat sensitive paper coatings

Details Sensitizer for heat sensitive paper coatings Sensitizer for heat sensitive paper coatings

1990-02-09

1991-11-19

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...

106 21, 503220, 503221, 503225, B41M 530

Patent

active

050666339

ABSTRACT:
A heat sensitive coating has a colorless or light colored leuco dye precursor, preferably having a five-membered spirol lactone ring at one end of the molecule, and a tertiary amino group at another end of the molecule, and a developer. Sensitizers which increase the heat sensitivity of these dye precursors, and compositions of sensitized dye/developer systems are disclosed. The sensitizers are .gamma.-substituted lactones, 3-naphthylmethylidenephthalide, and derivatives of benzalphthalide.

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Chemical Abstracts, vol. 109, No. 11, Abstract #201615x.

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