Semi-transparent coating material
A semi-transparent coating material for coating glass or glass ceramics includes at least one sol-gel hybrid-polymer coating system having a hybrid-polymer or inorganic sol-gel-based matrix, and nanoparticles and nanoscale pigments and/or dyes are added to the hybrid-polymer or inorganic sol-gel-based matrix.
1. A semi-transparent coating material for coating glass or glass ceramics comprising:
at least one sol-gel hybrid-polymer coating system having a hybrid-polymer or inorganic sol-gel-based matrix;
nanoparticles and nanoscale pigments and/or dyes are added to the hybrid-polymer or inorganic sol-gel-based matrix, wherein the nanoscale pigments are selected from the group consisting of titanium nitride (TiN), titanium carbide (TiC), zirconium nitride (ZrN), zirconium carbide (ZrC), cobalt-iron oxide, manganese-iron oxide, NiFeO 4 , CoZnFe 4 O 8 , CoFeO 4 , NiZnFe 4 O 8 , Fe 2 O 3 , and ZnO; and
a crosslinkable organic monomer and a monomer of a hardener or crosslinker that have a molar ratio of 35:1-10:1.
2. The coating material according to claim 1 , wherein the hybrid-polymer or inorganic sol-gel-based matrix has at least one sol-gel hybrid-polymer matrix selected from the group consisting of epoxy, methacrylate, allyl and vinyl silane.
3. The coating material according to claim 1 , further comprising a sol-gel binder having SiO 2 nanoparticles, whereby the mass ratio of sol-gel binder to a mass of nanoparticle amounts to 10:1 to 1:1.
4. The coating material according to claim 1 , wherein the nanoparticles are incorporated in the sol-gel hybrid-polymer coating system reactively via a metal-oxide or semimetal-oxide bond.
5. The coating material according to claim 1 , wherein the nanoparticles have a globular or spherical morphology and a size between 4 and 200 nm.
6. The coating material according to claim 1 , wherein the nanoparticles have a chain-form or fiber-form morphology, with an average length of 50 to 150 nm and an average size of 5 to 25 nm.
7. The coating material according to claim 1 , wherein the nanoscale pigments have a size of 1-200 nm.
8. The coating material according to claim 1 , further comprising a color matrix that has a glass powder as an inorganic component.
9. The coating material according to claim 1 , further comprising inorganic or hybrid-polymer sol-gel compounds as binder.
10. The coating material according to claim 1 , wherein the hybrid-polymer or inorganic sol-gel-based matrix has components selected from the group consisting of polyurethane resins, organically or inorganically crosslinking silicones, polysiloxanes, organic acrylate-based systems, methacrylates, epoxides, polyamides, polyimide, and combinations thereof.
11. The coating material according to claim 9 , wherein the binder has molecularly dispersed, colloidally dispersed or hybrid-polymer sol-gel precursors selected from the group consisting of silicon, titanium, zirconium, aluminum, zinc, magnesium, calcium, and tin.
12. The coating material according to claim 1 , further comprising a hardenable hybrid polymer that is selected from the group consisting of glycidyloxypropyl triethoxysilane, glycidyloxypropyl trimethoxysilane, vinyl triethoxysilane, allyl triethoxysilane, methacryloxypropyl trimethoxysilane, methacryloxypropyl triethoxysilane, a hydrolyzed alkoxy silane precursor containing one or more UV-hardenable, and thermally crosslinkable organic functional groups.
13. The coating material according to claim 1 , wherein the nanoparticles coupled with a binder have a volume fraction that is greater than 50%.
14. The coating material according to claims 1 , further comprising bis-epoxide, bis-methacrylate or organic hardeners or crosslinkers having organic crosslinkable groups.
15. The coating material according to claim 1 , wherein the hardener or crosslinker is 3,4-epoxycyclohexane carboxylate.
16. The coating material according to claim 1 , further comprising aluminum acetylacetonate, methylimidazole or thermally activatable initiators.
17. The coating material according to claim 1 , further comprising iodonium, (4-methylphenyl)[4-(2-methylpropyl)phenyl(-1)hexafluorophosphate, and a UV-activatable initiator.
18. A semi-transparent coating material for coating glass or glass ceramics comprising:
a mixture of a first component mixture and a second component mixture as a screen-printable 2-component coating based on hybrid polymer, whereby the first component mixture has the hybrid polymer and the second component mixture has nanoparticles, and the first and/or the second component mixture has nanoscale pigments and/or dyes, wherein the nanoscale pigments comprise TiN or organic black pigment; and
a crosslinkable organic monomer and a monomer of a hardener or crosslinker that have a molar ratio of 35:1-10:1.
19. The coating material according to claim 18 , wherein the first component mixture has an essentially solvent-free mixture of epoxy silane and tetraethoxysilane and in that the second component mixture has chain-form SiO 2 nanoparticles.
20. The coating material according to claim 18 , further comprising uenesulfonic acid, that is added to the first component mixture for preliminary crosslinking.
21. The coating material according to claim 19 , wherein the chain-form SiO 2 nanoparticles are dispersed in tripropylene glycol monomethyl ether.
22. The coating material according to claim 18 , further comprising a crosslinker and a leveling agent or deaerator that are added to the second component mixture.
23. The coating material according to claim 18 , wherein the semi-transparent coating has a transmittance in the visible wavelength region between 2 and 15%.