Patent ID: 7943063

Claim:
A method for producing a thermal indicator material comprising: providing a plurality of compounds having the following structure: wherein: R 1 -R 6 =a hydrogen, substituted or unsubstituted alkyl radical, substituted or unsubstituted alkoxy radical, substituted or unsubstituted thioalkyl radical, substituted or unsubstituted trialkylsilyl radical, substituted or unsubstituted acyl radical, substituted or unsubstituted ester radical, substituted or unsubstituted amine radical, substituted or unsubstituted amide radical, substituted or unsubstituted heteroaryl or substituted or unsubstituted aryl radical; n is between 1 and 1000; m is between 0 and 1000; l is between 1 and 1000; and the compounds having a first low temperature color; heating the compounds to a temperature of or above a pre-determined temperature to form heated compounds; cooling the heated compounds to a temperature within a range of between about 20° C. and 50° C. below the pre-determined temperature in a time period of less than 2.0 seconds to form cooled compounds, the cooled compounds exhibiting a second low temperature color and exhibiting a color change from the second low temperature color to the first low temperature color when the compounds are exposed to a temperature that meets or exceeds the pre-determined temperature and then cooled to a temperature within the range of between about 5 to 20° C. below the pre-determined temperature in a time period of greater than 2.0 seconds.