Kymmene Oy

Other

Metsalitto Osuuskunta

Koskisen Oy

Anne-Christine Ritschkoff

Liisa Viikari

Petri Silenius

Markku L&auml;hteenm&auml;ki

Markku Lehtonen

Leena Paajanen

Jaakko Korpela

Tiina Mattila-Sandholm

The present invention is related to a method of preserving plywood, particle board and similar wood composite products made from wood pieces/particles and a binder used to adhere such wood pieces/particle together against rot and mould decay. According to the invention, the preservative of the wood material is a complexing agent which is capable of binding transition group metals and is admixed into the binder used in the manufacture of said wood composite products prior to the formation of said product. The invention also concerns a binder composition, which contains a polymer resin as its adhesive component and a complexing agent, particularly an aminotetracarboxylic acid or a salt thereof, by approx. 1-30 wt.-% as the preservative of the wood material, and a method of producing said binder composition. Tests performed on faced plywood indicated that a water-soluble, environmentally safe complexing agent offers a white rot resistance which is superior to conventional preservatives commonly used today.

Method of preserving plywood and particle board against decay and mould

Method for preserving wood against undesirable reactions caused by

Wood preservation method and wood preservative

Growing community of inventors

Helsinki, Finland

Anne-Christine Ritschkoff