Compositions and process for the protective treatment of wood

US6348089B1 · kind B1 · utility

Assignees

• LONZA LTD · CH
• Impragnierwerk Wulknitz GmbH · DE

Inventors

• Hans-Norbert Marx · Bühl, DE
• Tilo Vogel · Zeitz, DE
• Oliver Arlt · Zeitz, DE
• Florian Lichtenberg · Grenzach, DE

Key dates

• Filing date: Oct 6, 2000
• Grant date: Feb 19, 2002
• Expiry date: Oct 6, 2020

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B27K3/08
• WIPO field: Machine tools
• WIPO sector: Mechanical engineering

Abstract

Compositions for the protective treatment of wood against rot and attack by insects which comprise at least the following components:a) 10-90 parts of coal-tar oilb) 2-20 parts of a biocidally active quaternary ammonium compoundc) 10-90 parts of water. are described. The compositions according to the invention are easily preparable stable emulsions which are distinguished, inter alia, by good penetrability, strongly reduced odour of the treated woods, absence of annoying tar oil enrichments at the surface and strongly reduced “bleeding” of the treated wood at hot temperatures, considerably enhanced activity in spite of a lower coal-tar oil content and reduced toxicity compared to pure coal-tar oil.