Heat-sensitive recording composition with mixed color precursors

Details Heat-sensitive recording composition with mixed color precursors Heat-sensitive recording composition with mixed color precursors

1977-03-04

1979-12-25

Taylor, Hosea E.

Compositions: coating or plastic

Coating or plastic compositions

Hectographic or copying

106 21, 106 22, 282 275, 427148, 427150, 428411, C09K 300

Patent

active

041804058

ABSTRACT:
A heat sensitive recording member capable of acquiring a stable color in selected regions contrasting with the background color of the coated substrate upon exposing these regions to an elevated temperature and comprising a paper or polymeric film substrate and a heat sensitive coating comprising (1) an adduct or mixture of color-forming lactones or spiropyrans with a cyclic polyketo color precursor, (2) a polymeric binder which bonds the reactants to the substrate and optionally (3) a molecular complex between a phenolic compound and an amine and/or an activator to lower the temperature of color formation.

REFERENCES:
patent: 3076707 (1963-02-01), Lawton
patent: 3149992 (1964-09-01), Lawton
patent: 3244549 (1966-04-01), Farnham et al.
patent: 3916068 (1975-10-01), Kohmura et al.
patent: 3944422 (1976-03-01), Nihyakumen et al.

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