Infrared-reflecting bodies

US6692824B2 · kind B2 · utility

Assignee

• ROEHM GMBH & CO. KG · DE

Inventors

• Volker Benz · Kelsterbach, DE
• Wolfgang Scharnke · Darmstadt, DE
• Michael Meier-Kaiser · Pfungstadt, DE
• Michael Muller · Harper Woods, US

Key dates

• Filing date: Oct 25, 1994
• Grant date: Feb 17, 2004
• Expiry date: Oct 25, 2014

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31935
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

A light-permeable, IR-reflecting body which contains a stiff, amorphous base material comprised of light-permeable plastic and IR-reflecting particles which are oriented parallel to the surface, said light-permeable IR-reflecting body having a transmissivity (T) in the visible range of 45-75%, an overall energy permeability (g) of 30-60%, and a T/g ratio of >1.15, and the IR-reflecting particles oriented parallel to the surface are disposed in a coating layer comprised of a transparent water-insoluble binder, which layer is 5-40 micron thick and adheres to the base material, wherewith red-reflecting particles with a layer of titanium dioxide 60-120 nm thick on a platelet-shaped carrier pigment are present in the aforesaid coating layer in the amount of 20-40 wt. % of said coating layer.