COMPOSITE PANEL HAVING A SUN PROTECTION COATING AND A THERMAL RADIATION REFLECTIVE COATING

Abstract

The invention relates to a composite panel (100), comprising an outer panel (1) having an outer side surface (I) and an inner side surface (II), an inner panel (2) having an outer side surface (III) and an inner side surface (IV), and a thermoplastic intermediate layer (3) bonding the inner side surface (II) of the outer panel (1) to the outer side surface (III) of the inner panel (2), wherein the composite panel has, between the outer panel (1) and the inner panel (2), at least one sun-protective coating (4) that substantially reflects or absorbs rays outside the visible spectrum of solar radiation, in particular infrared radiation, and wherein the composite panel optionally has a thermal radiation-reflective coating (5) (low-emissivity coating) on ​​the inner side surface (IV) of the inner panel (2), characterized in that the sun-protective coating (4) comprises,Starting from the outer panel (1), a layer sequence of - first dielectric module (M1), - first silver layer (Ag1), - second dielectric module (M2), - second silver layer (Ag2), - third dielectric module (M3), - third dielectric module (M3), - third silver layer (Ag3), - fourth dielectric module (M4), wherein the layers (Ag1, Ag2, Ag3) have a relative layer thickness of Ag1 / Ag2>1 and Ag1 / Ag3>1, and the modules (M1, M2, M3, M4) have a relative layer thickness of M2 / M1>1, M2 / M3>1, and M2 / M4>1; and the invention relates to a method for producing such a composite panel and the use thereof.

Claims

1. A composite panel (100), comprising an outer panel (1) having an outer side surface (I) and an inner side surface (II), an inner panel (2) having an outer side surface (III) and an outer side surface (IV) and an inner side surface (IV), and a thermoplastic intermediate layer (3) bonding the inner side surface (II) of the outer panel (1) to the outer side surface (III) of the inner panel (2), wherein the composite panel (100) has, between the outer panel (1) and the inner panel (2), at least one sun protection coating (4), characterized in that the sun protection coating (4) comprises, starting from the direction of the outer panel (1), a sequence of first dielectric module (M1), first silver layer (Ag1), second dielectric module (M2), second silver layer (Ag2), third dielectric module (M3), third silver layer (Ag3), fourth module (M4) dielectric, where the layers (Ag1, Ag2,The silver modules (M1, M2, M3, M4) have relative silver thicknesses of Ag1 / Ag2>1 and Ag1 / Ag3>1, and the dielectric modules (M1, M2, M3, M4) have relative layer thicknesses of M2 / M1>1, M2 / M3>1, and M2 / M4>1.

2. The composite panel (100) according to claim 1, further characterized in that the silver layers of the solar protection coating (Ag1, Ag2, Ag3) have a relative layer thickness of Ag1 / Ag2>1 and 1 <Ag1 / Ag3<3.

3. The composite panel (100) according to one of claims 1 or 2, further characterized in that the second and third silver layers (Ag2, Ag3) of the sun protection coating (4) have a relative layer thickness of 0.5 <Ag2 / Ag3<2.

0.

4. The composite panel according to any one of claims 1 to 3, further characterized in that the dielectric modules (M1, M2, M3, M4) have a relative layer thickness M2 / M1>1, M2 / M3>1.1, and M2 / M4 > 1.

5.

5. The composite panel (100) according to any one of claims 1 to 4, further characterized in that the dielectric modules (M1, M2, M3, M4) have at least one nitride layer, in particular a silicon nitride layer.

6. The composite panel (100) according to any one of claims 1 to 5, further characterized in that the layer sequence of the sun protection coating (4) includes at least one blocking layer (B), preferably in contact with one of the silver layers (Ag1, Ag2, Ag3).

7. The composite panel according to any one of claims 1 to 6, further characterized in that the sun protection coating (4) is applied to the inner side II of the outer panel 1 or to the outer side (III) of the inner panel (2) or in that the sun protection coating (4) is inserted into the intermediate layer (3).

8. The composite panel according to any one of claims 1 to 7, further characterized in that the thermoplastic intermediate layer (3) contains a carrier film (6) having the sun protection coating (4).

9. The composite panel according to any one of claims 1 to 8, further characterized in that the composite glass panel has an external energy reflection RE > 36%.

10. The composite panel according to any one of claims 1 to 9, further characterized in that the composite glass panel has an external energy reflection RLext > 8%. ML / a / ZUZZ / U 11 Zo4 11. The composite panel according to any one of claims 1 to 10, further characterized in that a thermal radiation reflective coating (5) is applied to the surface (IV) of the inner side of the inner panel (2).

12. The composite panel according to claim 11, further characterized in that the thermal radiation reflective layer (5) has a functional layer based on an indium tin oxide (ITO) layer or a tin oxide (SnO2) layer, the indium tin oxide layer being arranged between two dielectric layers.

13. The composite panel according to one of claims 11 or 12, further characterized in that the thermal radiation reflective coating has an emissivity of at most 50%, preferably at most 30%.

14. A method for producing a composite panel (100) according to any one of claims 1 to 13, characterized in that it comprises the steps of: applying a sun protection coating (4) to the inner surface (II) of the outer panel (1), or to the outer surface (III) of the inner panel (2), or introducing the sun protection coating (4) into the thermoplastic intermediate layer (3); joining the outer panel (1) and the inner panel (2) through the thermoplastic intermediate layer (3).

15. A method for producing a composite panel (100) according to claim 14, characterized in that a thermal radiation reflective coating (5) is applied to the inner surface (IV) of the inner panel (2).

16. The use of the composite panel (100) according to any one of claims 1 to 13 in means of locomotion for traveling by land, air, or water, in particular in motor vehicles, for example as a windscreen, medallion, side window, and / or roof panel, and as a functional individual part, and in buildings.

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