Back to results
US 9,375,965 B2Granted
Marking compound
OwnerAdam O'Rourke, Martin Walker +2inventors
InventorsAdam O'Rourke, Martin Walker, Richard Cook, Anthony Jarvis
Life of this patent
Estimating the term…
Abstract
Water soluble marking compounds comprising a transition metal oxyanion and at least one ammonium cation, comprising a nitrogen atom at least one further group selected from the group consisting of OH, COOH, NH2, NHC1-5 alkyl, and N(C1-5 alkyl)2, wherein the two C1-5 alkyl may be the same type of alkyl or different alkyls, may be used to obtain clear imageable coatings.
Claims9
A process of obtaining a clear laser imageable aqueous composition comprising a compound and an aqueous solvent, said compound comprising:
- (i) a transition metal oxyanion of formula AOxOyz−,
- wherein “x” is an integer of 1 to 18;
- “y” is an integer of 4 to 42;
- “z” is an integer of 1 to 12;
- and
- “A” is Mo (molybdenum) wherein the oxyanion is Mo8O26;
- (ii) at least one-ammonium cation(s) which is an alcohol-amine represented by HN(CH2CH2OH)3;
- HNR1R2R3+ (I)
- (iii) one or several NH4+ cations;
- and
- (iv) one or several molecules of water, the process comprising:
- adding molybdenum (VI) oxide, ammonium chloride, and triethanolamine to an aqueous solvent;
- heating the resulting mixture;
- adding the heated mixture to a water miscible organic solvent;
- precipitating crystals of a compound that is tetra-triethanolammoniumoctamolybdate ((HN(CH2CH2OH)3)4*Mo8O26);
- and
- isolating said crystals.
14 more elements
Dependencies are inferred from the claim text.