Fiber composites with high dimensional stability, weather resistance and flame resistance

摘要

The invention relates to fibre composites with excellent dimensional stability, weather resistance and flameproofing properties. Said composites have a semi-interpenetrating network structure which consists of between 60 and 95 wt.- % fibrous material and/or wood particles and between 5 and 40 wt.- % hydrophobed melamine resin. The composites are produced by a method, in which fibrous materials and/or wood particles with a residual water content of between 0.5 and 5 wt.- % are subjected to the sorption of a non-aqueous ammoniac dispersion or solution of a hydrophobed melamine resin precondensate, the plastic reaction mixture is discharged, after degasification of the volatile components, as a strand or raw film and the granulate is then subjected to an extrusion process or an injection moulding process to obtain moulded materials, at processing temperatures of up to 200 DEG C, or the raw film is subjected to post-processing by compression moulding or calendering, at processing temperatures of up to 180 DEG C, the fibre composite being cured during said process. The fibre composites are suitable for use as high-performance wood products and moulded wood semi-finished products in the form of panels, sections, hollow sections and tubes with a low-water absorption and excellent dimensional stability, weather-resistance and flameproofing properties, in particular in the furniture industry, in automotive construction and for construction applications such as façade elements.