Heat-sensitive recording composition with mixed color...

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

C - Chemistry, Metallurgy

09

D

42/3

C09D 11/00 (2006.01) B41M 5/333 (2006.01)

Patent

CA 1099100

HEAT-SENSITIVE RECORDING COMPOSITION WITH MIXED COLOR PRECURSORS ABSTRACT OF THE DISCLOSURE 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.

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