Composite pane having sun protection coating and thermal-radiation-reflecting coating

US11001037B2 · kind B2 · utility

Assignee

• SAINT-GOBAIN GLASS FRANCE · FR

Inventors

• Jan HAGEN · Bonn, DE
• Robert BESLER · Herzogenrath, DE
• Valentin SCHULZ · Niederzier, DE

Key dates

• Filing date: Oct 15, 2018
• Grant date: May 11, 2021
• Expiry date: Oct 15, 2038

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C03C2217/948
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

A composite pane, includes an outer pane having an outer-side surface and an interior-side surface, an inner pane having an outer-side surface and an interior-side surface, and a thermoplastic intermediate layer, which joins the interior-side surface of the outer pane to the outer-side surface of the inner pane. The composite pane has, between the outer and inner panes, a sun protection coating, which substantially reflects or absorbs rays outside the visible spectrum of solar radiation. The composite pane has, on the interior-side surface of the inner pane, a thermal-radiation-reflecting coating (low-E coating). The composite pane has a transmittance index A of 0.02 to 0.08, wherein the transmittance index A is determined according to the following formula A=TLcomposite glass pane/(TLlow-E-coated pane*TE). TL is the light transmittance and TE is the energy transmittance measured according to ISO 9050.