Heat shielding additives

US8168711B2 · kind B2 · utility

Assignee

• BASF SE Ludwigshafen · DE

Inventors

• Marc Andrew Mamak · Mason, US
• Francesca Peri · Bologna, IT

Key dates

• Filing date: Oct 23, 2008
• Grant date: May 1, 2012
• Expiry date: Oct 23, 2028

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C01P2004/38
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

Polymer dispersions of powders based on tungsten hydrogen bronze, especially containing a minor amount of tungsten metal, show good IR absorbing and heat shielding properties. The powders may be obtained by contacting an ammonium tungstate with hydrogen at a temperature of 2500 K or more, e.g. in a plasma.