Treatment of timber with water soluble dimethylol resins to improve their dimensional stability and durability

Wood Science and Technology - Tập 27 - Trang 347-355 - 1993
H. Militz1
1Foundation for Timber Research SHR, AP Maarssen, The Netherlands

Tóm tắt

European Beech (Fagus silvatica L.) was impregnated with a dimethylol resin to improve its dimensional stability and durability. Different catalysts were evaluated in combination with the resin. Depending on the range of relative humidity, the resin improved the shrinkage and swelling by approximately 50%. The use of an acid (citric or tartaric) catalyst lead to improved resin curing. A curing temperature of 100 °C is necessary.

Tài liệu tham khảo

Ashaari, Z.; Barnes, H. M.; Lyon, D. E.; Vasishth, R. C.; Nicholas, D. D. 1990: Effect of aqueous polymer treatments on wood polymer properties. Part 1: Treatability and dimensional stability. IRG/WP 3610. Part 2: Mechanical properties. IRG/WP/3611. International Research Group on Wood Preservation, Sweden European Standard EN 113: Wood Preservation: Determination of the toxic values against wood destroying basidiomycetes cultured on an agar medium. PrEN 113, 2/1990 Franklin, W. E.; Madacsi, J. P.; Rowland, S. P. 1972: Recurable durable-press fabrics. Polycarboxylic acids as co-reactant during catalysts with N-methylol reagents. Textile Res. J. 274–280. Kullman, M. H. R.; Reinhardt, M. R. 1978: Aluminium salt catalyst in durable-press finishing treatments. Textile Res. J. 320–324 Militz, H. 1991: Die Verbesserung des Schwind und Quellverhaltens und der Dauerhaftigkeit von Holz mittels Behandlung mit unkatalysiertem Essigsäureanhydrid. Holz Roh Werkstoff 49: 147–152 Nicholas, D. D.; Williams, A. D. 1987: Dimensional stabilization of wood with dimethylol compounds. International Research Group on Wood Preservation, Documnet IRG/WP/3412 Rowell, R. 1975: Chemical modifications of wood. Proceedings American Woodpreservers Ass. 71: 41–51 Videlov, C. L. 1989: Biological degradation resistance of pinewood treated with dimethylol components. International Research Group on Wood Preservation, Document IRG/WP/3528