Compositions for recording sensitive to heat, comprising a coating based on products of condensation of diimino heterocyclic compounds and aromatic aldehydes, and cyclic compounds polyketonic

摘要

P compositions of recording sensitive to heat. These compositions comprise a substrate of the polymer film or of paper and a coating containing 1, a product of condensation n - substituted with a heterocyclic compound diimino and an aromatic aldehyde and 2, a cyclic compound polyketone reactive with amines and amides to high temperatures in order to form a color. / p & & p & the present invention is particularly useful to provide compositions which are capable of recording acquire a color which is stable in the regions selected, contrasting with the background color of the sheet, by exposure of these regions to a high temperature. / p