Heat sensitive coating, recording material and methods of manufacture
AssigneeNashua Corporation
InventorMohamed Elmasry
Life of this patent
Estimating the term…
Abstract
Disclosed are heat sensitive coatings and record materials that are environmentally resistant and therefore do not require a protective coating. One embodiment includes an environmentally resistant heat sensitive coating that includes 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, nitrile 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.
Claims30
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.
An environmentally resistant heat sensitive recording material comprising:
- a substrate;
- and
- a 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, nitrile 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.
A method of making an environmentally resistant heat sensitive recording comprising:
- (a) providing a 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 nitrite 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, nitrile 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;
- (b) coating a substrate with the heat sensitive coating;
- and
- (c) thermally activating the heat sensitive coating.
Dependencies are inferred from the claim text.