Printed appliance component
A method for producing an appliance component is provided. The appliance component has an operational front side and back side and has a substrate made of thermally tempered flat glass with a coating. The method includes the steprs of: a) providing a glass substrate made of thermally tempered glass with the dimensions of the appliance component; b) applying a preparation for producing an adhesion promoter layer onto a surface of the glass substrate, wherein the preparation is applied onto the surface of the glass substrate that forms the operational back side of the decorative panel; c) producing the adhesion promoter layer by polymerization of the preparation applied in step b); d) applying a preparation for producing an organic color layer onto the adhesion promoter layer produced in step c) by digital printing; and e) producing the organic color layer by polymerization of the preparation applied in step d).
1 . An appliance component, comprising:
a glass substrate having an operational front side that faces a user and an operational back side that faces an inside of the appliance, the glass substrate being made of thermally tempered flat glass;
a coating only on the operational back side, wherein the coating comprises at least two coatings, wherein the at least two coatings comprise an intrinsically colored adhesion promoting layer adjacent to the operational back side and an organic color layer applied to the adhesion promoting layer, wherein the organic color layer is a digitally printed layer having a polymer matrix and a colorant;
wherein the adhesion promoting layer comprises a polymer matrix with functional groups for bonding to the glass substrate, and wherein the adhesion promoting layer is between the glass substrate and the organic color layer;
wherein the adhesion promoting layer has a transmittance of at least 80% for a light wavelength range between 380-780 nm at a layer thickness in a range of between 1-5 μm, and wherein the organic color layer is viewable through the adhesion promotor layer and through the glass substrate, from the operational front side of the glass substrate with a mean color coordinate shift ΔE caused by the adhesion promoting layer that is <15 for a color blue, is <5 for a color red, and is <6 for a color green, and
wherein:
(a) the adhesion promoting layer comprises a copolymer containing the following monomer units:
wherein R1 is an aromatic residue, R2 is an aliphatic residue or an aliphatic acid, R3 is hydrogen or a methyl group, and R4 is an aliphatic or aromatic residue;
or
(b) the polymer matrix of the adhesion promoter promoting layer is crosslinked by Si—O—Si bonds and carbon-carbon bonds.
2 . The appliance component of claim 1 , wherein the glass substrate is selected from a group consisting of a substrate having a thickness of at least 2.5 mm, a substrate having a thickness in a range of 3 to 8 mm, and a substrate having a thickness in a range of 3.5 to 5.5 mm.
3 . The appliance component of claim 1 , wherein the polymer matrix of the adhesion promoting layer is formed from monomer units of at least one monomer with radically polymerizable groups.
4 . The appliance component of claim 1 , wherein the polymer matrix of the organic color layer comprises a crosslinked polyacrylic matrix and at least one organic colorant.
5 . The appliance component of claim 1 , wherein the organic color layer comprises at least one light stabilizer comprising a constituent selected from the group consisting of HALS, piperidine derivatives, and organic aromatic compounds with extended π-systems.
6 . The appliance component of claim 1 , wherein the organic color layer is a single layer having a force required for delamination from the glass substrate of 3.5 to 5 N.
7 . The appliance component of claim 1 , wherein the organic color layer comprises two layers and that the coating has a force required for delamination from the glass substrate of 5 to 7 N.
8 . The appliance component of claim 1 , wherein the organic color layer comprises three layers and that the coating has a force required for delamination from the glass substrate of 14 to 16 N.
9 . The appliance component of claim 1 , wherein the coating further comprises an opaque cover layer arranged on the organic color layer.
10 . The appliance component of claim 1 , wherein the glass substrate is a soda-lime glass substrate.
11 . The appliance component of claim 1 , wherein the polymer matrix of the adhesion promoting layer comprises silanes with polymerizable groups, and silsesquioxanes with polymerizable groups.
12 . The appliance component of claim 1 , wherein the polymer matrix of the adhesion promoting layer comprises pre-hydrolysates of silanes with polymerizable groups as monomer units.
13 . The appliance component of claim 1 , wherein the polymer matrix of the adhesion promoting layer comprises trialkoxysilanes containing an acrylic or vinyl group.