METHOD FOR IMPREGNATING SOLID WOOD

WIPO Patent Application WO2005097443

A3

The invention relates to a method for pressure-impregnating wood with an impregnating agent that is at least partially liquid under the effect of pressure, especially paraffin. The aim of the invention is to achieve a high weathering and aging resistance while maintaining the strength and elasticity of the wood. According to the invention, the impregnating agent comprises a mixture of paraffin and/or waxes having different chain length and molecular size including not more than 5 % of water. The paraffins or waxes as components of the mixture are selected such that they are at least partially solid at ambient temperature and liquefy at least partially only at substantially higher temperatures, at least above 50° C. Alternatively, a mass is used as the impregnating agent that is completely liquid at least with respect to its base component paraffin or wax when the impregnation is carried out, at a temperature of 50 °C or more, and said paraffin or wax is selected such that it is solid at a temperature below 50 °C.

FRICK THORSTEN (DE)
HAAS THOMAS (DE)
MATTHAEI MICHAEL (DE)

PCT/EP2005/051540

April 13, 2006

April 07, 2005

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SASOL WAX GMBH (DE)
FRICK THORSTEN (DE)
HAAS THOMAS (DE)
MATTHAEI MICHAEL (DE)

B27K3/08; B27K3/34; B27K3/36; (IPC1-7): B27K3/36; B27K3/08; B27K3/34

WO2002098578A1	2002-12-12
WO2004056542A1	2004-07-08

US1892658A	1932-12-27
GB316649A	1929-08-02
EP1260331A1	2002-11-27
US1556570A	1925-10-06
GB265206A	1927-10-06
US3617314A	1971-11-02
GB1318076A	1973-05-23

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