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US 8,178,277 B2Granted
Electromagnetic radiation or thermally sensitive composition
AssigneeDatalase Ltd.
InventorsJonathan Campbell, Adolf Käser
Life of this patent
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Abstract
The present invention provides coating compositions comprising (i) a) a compound containing a free carbonyl group and b) a nucleophile or (ii) a compound containing a free carbonyl group, which compound is substituted with one or more nucleophilic groups. The present invention also provides 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.
Claims9
A coating composition comprising
- a) a reducing carbohydrate selected from at least one of an aldose, a ketose, a reducing oligosaccharide and a reducing polysaccharide, and
- b) an amine selected from at least one of an amino acid and an amino sugar,
- wherein the molar ratio of the reducing carbohydrate to the amine is in the range of 10:1 to 1:10.
Dependencies are inferred from the claim text.