Patent Number: 7,611,753

Title: Process for impregnating porous mineral substrates

Abstract: A process is provided for impregnating porous mineral substrates by a spray technique in which use is made of a gas-supported spraying assembly to apply liquid impregnating agent in a controlled manner to the substrate surface, the amount consumed being markedly less than the amount consumed in a conventional method of application by a flow-coating process.

Inventors: Bartkowiak; Bernd (Wehr-Oeflingen, DE), Weissenbach; Kerstin (Bad Saeckingen, DE), Kempkes; Nadja (Rheinfelden, DE), Standke; Burkhard (Loerrach, DE)

Assignee: Degussa AG

International Classification: B05D 1/02 (20060101)

Expiration Date: 1/03/02017