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- Nachgewiesen in: USPTO Patent Applications
- Sprachen: English
- Document Number: 20230303608
- Publication Date: September 28, 2023
- Appl. No: 18/015549
- Application Filed: July 09, 2021
- Claim: 1-17. (canceled)
- Claim: 18. Particles of a compound of formula [chemical expression included] wherein M is selected from Ni, Pd and Pt, X1 and X2 are each independently of each other sulfur or oxygen, R1, R2, R3, and R4 are independently selected from an unsubstituted, or substituted alkyl group, an unsubstituted, or substituted cycloalkyl group, an unsubstituted or substituted aryl group and an unsubstituted or substituted heteroaryl group, wherein the particles have a median particle size (D50) in the range of from 30 nm to 90 nm with D10 being greater than 20 nm.
- Claim: 19. The particles according to claim 18, wherein the compound of formula (I) is a compound of formula [chemical expression included] [chemical expression included] [chemical expression included] wherein M, X1, X2, R1 and R2 are defined in claim 18.
- Claim: 20. The particles according to claim 19, wherein in the compound of formula (Ia) R1 is an unsubstituted, or substituted alkyl group, an unsubstituted or substituted aryl group.
- Claim: 21. The particles according to claim 19, wherein in the compound of formula (Ib), or (Ic) R1 is an unsubstituted, or substituted alkyl group and R2 an unsubstituted or substituted aryl group.
- Claim: 22. The particles according to claim 18, wherein X1 and X2 are sulfur.
- Claim: 23. The particles according to claim 18, wherein M is Ni.
- Claim: 24. The particles according to claim 18, wherein the compound of formula (I) is a compound of formula [chemical expression included] [chemical expression included] [chemical expression included] [chemical expression included] [chemical expression included] [chemical expression included] [chemical expression included] [chemical expression included] [chemical expression included] [chemical expression included] [chemical expression included] [chemical expression included] [chemical expression included] [chemical expression included] [chemical expression included] [chemical expression included] [chemical expression included] [chemical expression included] [chemical expression included] [chemical expression included] [chemical expression included] [chemical expression included] [chemical expression included] [chemical expression included] [chemical expression included] [chemical expression included] [chemical expression included] [chemical expression included] [chemical expression included] [chemical expression included] [chemical expression included] [chemical expression included] [chemical expression included] [chemical expression included] [chemical expression included] [chemical expression included] [chemical expression included] [chemical expression included] [chemical expression included] [chemical expression included] [chemical expression included] [chemical expression included] [chemical expression included] [chemical expression included] [chemical expression included] [chemical expression included] [chemical expression included] .
- Claim: 25. A method comprising utilizing the particles according to claim 18 as IR absorber for optical filter applications, for plasma display panels, for laser marking of paper or plastics, for laser welding of plastics, for 3D printing, for fuel marking, as marker for circular economic products, for the curing of surface-coatings using IR radiators, for the drying and curing of print, for the fixing of toners on paper or plastics, for heat shielding applications, for invisible and/or IR readable bar codes, or as IR absorber in security printing.
- Claim: 26. A printing ink formulation, comprising the particles according to claim 18.
- Claim: 27. The printing ink formulation according to claim 26, further comprising a) a polymeric binder, b) a solvent, c) optionally at least one colorant, and d) optionally at least one further additive.
- Claim: 28. The printing ink formulation according to claim 26, comprising a) 0.0001 to 25 % by weight of the particles, b) 5 to 74 % by weight of at least one polymeric binder, c) 1 to 94.9999 % by weight of at least one solvent, d) 0 to 25 % by weight of at least one colorant, and e) 0 to 25 % by weight of at least one further additive, wherein the sum of components a) to e) adds up to 100%.
- Claim: 29. A process for the manufacture of a security document comprising the steps printing on a substrate a printing ink formulation according to claim 26.
- Claim: 30. A security document, comprising a substrate and at least one compound according to claim 18.
- Claim: 31. The security document according to claim 30, which is selected from a bank note, a passport, a check, a voucher, an ID- or transaction card, a stamp and a tax label.
- Claim: 32. A process for the production of the particles according to claim 18, comprising a) providing a mixture of a compound of formula [chemical expression included] wherein M is selected from Ni, Pd and Pt, X1 and X2 are each independently of each other sulfur or oxygen, R1, R2, R3, and R4 are independently selected from an unsubstituted, or substituted alkyl group, an unsubstituted or substituted aryl group and an unsubstituted or substituted heteroaryl group, a solvent and an inorganic salt; and b) kneading the mixture at a temperature of from 20 to 150° C. for 2 to 15 hours.
- Claim: 33. The process according to claim 32, wherein the inorganic salt is selected from sodium chloride and sodium sulfate.
- Claim: 34. The process according to claim 32, wherein the solvent is an aliphatic alcohol, diol or polyol, especially diethylene glycol, or triethylene glycol, or a mixture thereof.
- Current International Class: 07; 07; 09; 09; 41
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