Composite pane with opaque masking region and partially transparent reflective coating
A composite pane includes an outer pane and an inner pane, which are connected to one another via a thermoplastic intermediate layer, wherein the composite pane has an opaque masking region and a transparent see-through region, wherein the intermediate layer has a functional element which covers the entire see-through region, wherein at least one region of the side edge of the functional element does not extend as far as the side edge of the composite pane but is arranged within the masking region, and wherein the surface of the outer pane facing away from the intermediate layer has a pattern of coated regions in the masking region which are provided with a partially transparent reflective coating.
1 . A composite pane, comprising an outer pane and an inner pane, which are connected to one another via a thermoplastic intermediate layer,
wherein the composite pane has an opaque masking region and a transparent see-through region,
wherein the intermediate layer has a functional element which covers the entire see-through region,
wherein at least one region of a side edge of the functional element does not extend as far as a side edge of the composite pane but is arranged in the masking region,
and wherein a surface of the outer pane facing away from the intermediate layer has a pattern of coated regions in the masking region which are provided with a partially transparent reflective coating.
2 . The composite pane according to claim 1 , wherein the masking region surrounds the see-through region in a frame-like manner.
3 . The composite pane according to claim 1 , wherein the masking region is formed by a cover print on a surface of the outer pane facing the intermediate layer or by a tinted or coloured film in the intermediate layer.
4 . The composite pane according to claim 3 , wherein the functional element is an electrochromic functional element comprising an electrochromic active layer sequence between two planar electrodes.
5 . The composite pane according to claim 4 , wherein the two planar electrodes are electrically contacted in at least one portion of an edge region of the functional element in each case by a busbar, wherein the busbars are arranged in the masking region and wherein at least the portion of the masking region in which the busbars are arranged is provided with the pattern of coated regions.
6 . The composite pane according to claim 4 , wherein
the busbars are mounted on the circumference of the two planar electrodes,
the masking region surrounds the see-through region in a frame-like manner, and
the masking region is circumferentially provided with the pattern of coated regions.
7 . The composite pane according to claim 1 , wherein the partially transparent reflective coating is printed onto the coated regions.
8 . The composite pane according to claim 1 , wherein the partially transparent reflective coating is a sol-gel coating.
9 . The composite pane according to claim 1 , wherein the partially transparent reflective coating contains metal oxide.
10 . The composite pane according to claim 9 , wherein the metal is selected from the group consisting of aluminium, tin, titanium, copper, chromium, cobalt, iron, manganese, zirconium, cerium, yttrium, silver, gold, platinum and palladium.
11 . The composite pane according to claim 1 , wherein a thickness of the partially transparent reflective coating is from 5 μm to 50 μm.
12 . The composite pane according to claim 1 , wherein a coverage density of the pattern of coated regions decreases toward the see-through region.
13 . The composite pane according to claim 1 , wherein the pattern of coated regions is formed from lines or strips directed toward the see-through region.
14 . The composite pane according to claim 1 , wherein the partially transparent reflective coating has a degree of transmission and a degree of reflection in the visible spectral range that are each at least 10%.
15 . A method comprising providing a composite pane according to claim 1 as a vehicle window.
16 . The composite pane according to claim 7 , wherein the partially transparent reflective coating is printed onto the coated regions by screen printing.
17 . The composite pane according to claim 11 , wherein the thickness of the partially transparent reflective coating is from 8 μm to 16 μm.
18 . The method according to claim 15 , wherein the vehicle window is a vehicle side window.
19 . The composite pane according to claim 1 , wherein the coated regions of the pattern are mutually isolated from one another such that each coated region is completely surrounded on the surface of the outer pane by an uncoated region not provided with the partially transparent reflective coating, and wherein adjacent coated regions are separated from one another by an uncoated distance of at least 0.5 mm.
20 . The composite pane according to claim 1 , wherein the surface of the outer pane bearing the pattern of coated regions is the outermost surface of the composite pane facing an external environment when the composite pane is installed, and wherein the coated regions occupy from 5% to 90% of a total area of the masking region on the outermost surface, with a remaining area of the masking region on the outermost surface being uncoated.