Patent ID: 6348432
Filing Date: 2002-02-19
Classification: B41C,B41M,C08J,C09D

Abstract:
An environmentally resistant heat sensitive coating comprising:a color former selected from the group consisting of fluorans, thiofluoranes, spiropyrans, triarylmethanes, xanthenes, and methynes; a color developer; and an acrylate polymer of the formula: wherein R1 is a hydrogen or a methyl group, R2 is a hydrogen or a methyl group, and R3 is nitrile or chlorine or wherein, when c is 0, R4 is methyl, phenyl, or substituted phenyl, and when c is greater than 0, R4 is methyl, phenyl, substituted phenyl, halogen, nitrite or hydroxyl; m is greater than 1; n is greater than 1; b is greater than or equal to 0; and c is an integer from 0 to 38.