Printable ink mixture, method for producing a colored overprint, and use of the ink mixture
AssigneeLedvance GmbH
InventorsMatthias Schiplage, Ewald Poesl, Matthias Schmidt
Life of this patent
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Abstract
A printable ink mixture may include: a medium, orthophosphoric acid, at least one metal oxide, and at least one pigment. A method for producing a color print on a glass or ceramic surface may include: producing an ink mixture including a medium, orthophosphoric acid, at least one metal oxide, and at least one pigment, applying the ink mixture to the glass or ceramic surface, removing the medium from the ink mixture, and baking the ink mixture on the glass or ceramic surface to produce the color print.
Claims14
A lead-free printable ink mixture consisting of:
- a medium,
- orthophosphoric acid,
- at least one type of metal oxide nanoparticles, wherein the metal oxide nanoparticles comprise a trivalent metal cation selected from the group consisting of:
- cations of scandium, yttrium, and lanthanoids, and the metal oxide nanoparticles have an average primary particle size of 15-20 nanometers and an average agglomerate size of 30-100 nanometers, and
- at least one pigment,
- wherein the medium is present in a proportion of 25 to 45% by weight, the orthophosphoric acid in a proportion of 8 to 22% by weight, the metal oxide nanoparticles in a proportion of 1 to 3% by weight and the pigment in a proportion of 35 to 50% by weight,
- wherein the medium is anhydrous glycerol, and
- wherein the at least one pigment is suspended in the orthophosphoric acid.
A process for producing a color print on a glass or ceramic surface, comprising:
- producing a lead-free printable ink mixture, consisting of:
- a medium,
- orthophosphoric acid,
- at least one type of metal oxide nanoparticles, wherein the metal oxide nanoparticles comprise a trivalent metal cation selected from the group consisting of:
- cations of scandium, yttrium, and lanthanoids, and the metal oxide nanoparticles have an average primary particle size of 15-20 nanometers and an average agglomerate size of 30-100 nanometers, and
- at least one pigment,
- applying the lead-free printable ink mixture to the glass or ceramic surface,
- removing the medium from the lead-free printable ink mixture, and
- baking the lead-free printable ink mixture on the glass or ceramic surface to produce the color print,
- wherein the medium is present in a proportion of 25 to 45% by weight, the orthophosphoric acid in a proportion of 8 to 22% by weight, the metal oxide nanoparticles in a proportion of 1 to 3% by weight and the pigment in a proportion of 35 to 50% by weight,
- wherein the medium is anhydrous glycerol, and
- wherein during baking, the orthophosphoric acid is condensed to form at least one of cyclic metaphosphate and catenated polyphosphate.
A glass and/or ceramic surface comprising a lead-free printable ink mixture applied thereto;
- wherein the lead-free printable ink mixture consists of:
- a medium,
- orthophosphoric acid,
- at least one type of metal oxide nanoparticles, wherein the metal oxide nanoparticles comprise a trivalent metal cation selected from the group consisting of:
- cations of scandium, yttrium, and lanthanoids, and the metal oxide nanoparticles have an average primary particle size of 15-20 nanometers and an average agglomerate size of 30-100 nanometers, and
- at least one pigment,
- wherein the medium is present in a proportion of 25 to 45% by weight, the orthophosphoric acid in a proportion of 8 to 22% by weight, the metal oxide nanoparticles in a proportion of 1 to 3% by weight and the pigment in a proportion of 35 to 50% by weight, and
- wherein the medium is anhydrous glycerol.
Dependencies are inferred from the claim text.