Coating composition for marking substrates
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United States of America Patent
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Feb 23, 2016
Grant Date -
Nov 10, 2011
app pub date -
Oct 16, 2009
filing date -
Oct 27, 2008
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Abstract
Coating composition comprising a char forming compound as a first compound capable of forming a colored substance upon exposition to energy; at least one latent activator selected from the group consisting of ammonium phosphate, ammonium polyphosphate, ammonium sulfite, ammonium thiosulfate, ammonium sulfamate and ammonium sulfate; and a second compound capable of forming a colored substance upon exposition to energy selected from the group consisting of color formers, oxygen containing transition metal compounds, and metal-chelate-type color forming systems; a coating composition comprising a char forming compound as a first compound capable of forming a colored substance upon exposition to energy, and a second compound capable of forming a colored substance upon exposition to energy selected from the group consisting of color formers and metal-chelate-type color forming systems; a process for the preparation of these compositions, substrates coated with these compositions and a process for their preparation, a process for preparing marked substrates using these compositions and marked substrates obtainable by the latter process.
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