Transparent multilayer structure for thermal management

US11440382B2 · kind B2 · utility

Assignee

• Covestro Deutschland AG · DE

Inventors

• Alexander Meyer · Mülheim an der Ruhr, DE
• Rafael Oser · Krefeld, DE
• Dirk Hinzmann · Pulheim, DE
• Timo Kuhlmann · Leichlingen, DE

Key dates

• Filing date: Nov 16, 2017
• Grant date: Sep 13, 2022
• Expiry date: Oct 8, 2038

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B60J1/002
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

The invention relates to transparent multilayer structures and glazings or glazing elements comprising said multilayer structures, which are suitable for screening an indoor space from a radiation source, comprising, in this order a) optionally a protective layer a, b) a substrate layer based on a thermoplastic polymer, especially an aromatic polycarbonate, having a luminous transmittance in the range of 380 to 780 nm of at least 0.3%, determined at a layer thickness of 4 mm according to DIN ISO 13468-2:2006 (D65, 10°), and a TDS value of less than 40%, determined according to ISO 13837:2008 at a layer thickness of 4 mm, the substrate layer containing at least 0.001 wt. % of an IR absorber different from carbon black, c) if necessary, another layer c based on a thermoplastic polymer with a maximum thickness of 600 μm, d) at least one metal layer d, containing at least one element selected from the group including Ag, Al, Au, Pt, Fe, Cr, Sn, In, Ti, Pd, Nb, Cu, V or their alloys, the sum of thicknesses of all metal layers being 1 nm to not more than 30 nm, and e) optionally a protective layer e, at least 60% of the substrate layer b being covered by metal layer d, the layers followi…