Opaque multi-layer body of polycarbonate for heat management

US11351764B2 · 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: Jun 7, 2022
• Expiry date: Aug 24, 2038

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B32B2605/00
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

The invention relates to a vehicle body part, comprising a multi-layer body, comprising, in this order, a) optionally a protective layer a, b) a substrate layer b based on a thermoplastic polymer, having a light transmittance of less than 1.0% in the range of 380 to 780 nm, determined at a layer thickness of 4 mm in accordance with DIN ISO 13468-2:2006 (D65, 10°), and an energy transmittance TDS of less than 40%, determined in accordance with ISO 13837:2008 at a layer thickness of 4 mm, c) optionally a further layer c based on a thermoplastic polymer having a maximum thickness of 600 μm, d) a metal layer d, containing at least one element selected from Ag, Al, Au, Pt, Fe, Cr, Sn, In, Ti, Pd, Nb, Cu, V, stainless steel or alloys thereof, having a thickness of 40 nm to 500 μm, and e) optionally a protective layer e, wherein the metal layer d is arranged on the side of the multi-layer body that is intended to be oriented toward the vehicle interior and wherein the layers following the layer d), including the protective layer e, have a total thickness of at most 50 nm.