Silverbrook Research Pty Ltd

Maxine Sintic

Kia Silverbrook

Paul Lapstun

Damon Donald Ridley

Simone Charlotte Vonwiller

Scott Matthew Starling

Simon Fielder

Lachlan Everett Hall

Sutharsiny Indusegaram

A substrate having an IR-absorbing dye disposed thereon. The IR-absorbing dye is a metal phthalocyanine dye having branched axial ligands. The branched axial ligands minimize interaction between &#x3c0; systems of adjacent dye molecules, and assist in reducing absorption of visible wavelengths.

Substrate having IR-absorbing dye with branched axial ligands

A method of printing an IR-absorbing dye onto a substrate whilst minimizing visible coloration of the substrate. The method comprises: (i) preselecting the dye from a metal-cyanine of formula (I): Q, Q, Qand Qare the same or different and are independently selected from a Carylene group or a Cheteroarylene group;M is selected from Si(A)(A), Ge(A)(A), Ga(A), Al(A), Mn(A), Fe(A), Sn(A)(A), Pb(A)(A);Aand Amay be the same or different and are axial ligands comprising a group for reducing {tilde over (&#x25a1;)}-&#x25a1; interactions between adjacent dye molecules; and (ii) printing the dye onto the substrate.

Method of printing an IR-absorbing dye onto a substrate

An inkjet ink comprising an IR-absorbing dye. The dye is a metal-cyanine complex of formula (I): whereinQ, Q, Qand Qare the same or different and are independently selected from a Carylene group or a Cheteroarylene group;M is selected from Ti(A)(A), Zr(A)(A), V(A)(A), Si(A)(A), Ge(A)(A), Ga(A), Al(A), Mn(A), Fe(A), Sn(A)(A), or Pb(A)(A); andAand Amay be the same or different and are axial ligands of formula (IIIa) wherein:Crepresents a core unit having two or more branching positions;each Pis independently selected from H, a hydrophilic moiety or a branched moiety;gis an integer from 2 to 8;qis 0 or an integer from 1 to 6; andeach pis independently selected from 0 or an integer from 1 to 6.

Inkjet ink comprising metal-cyanine dye with improved water-solubility

The present invention provides a method of minimizing absorption of visible light in an ink composition comprising an IR-absorbing macrocyclic cyanine dye, comprising preselecting said dye such that it includes at least one moiety for reducing intermolecular interactions between adjacent dye molecules. The method is especially suitable for use in connection with netpage and Hyperlabel systems.

Method of minimizing absorption of visible light in ink compositions comprising IR-absorbing metal-cyanine dyes

The present invention provides an IR-absorbing metal-cyanine dye, in which the metal has at least one axial ligand bound thereto, and wherein the axial ligand comprises a hydrophilic or hydrophilizable moiety. Dyes of this type are especially suitable for use in netpage and Hyperlabel systems.

Metal-cyanine dye having improved water solubility

The present invention provides an IR-absorbing metal-cyanine dye, said metal having at least one axial ligand bound thereto, wherein said axial ligand comprises a moiety suitable for reducing intermolecular interactions between adjacent dye molecules, thereby minimizing absorption of visible light. Dyes of this type are especially suitable for use in netpage and Hyperlabel systems.

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Balmain, Australia

Maxine Sintic