SCHWERENTFLAMMBARE STRANGPRESSKOERPER, INSBESONDERE STRANGPRESSPLATTEN, SOWIE SCHWERENTFLAMMBARE FURNIERTE ODER BESCHICHTETE STRANGPRESSPLATTEN, EIN VERFAHREN ZU IHRER HERSTELLUNG UND IHRE VERWENDUNG

摘要

The disclosure relates to difficulty flammable wooden articles, especially chip boards comprising solid and pipe boards, prepared by extrusion from wooden chips and/or woody fibrous materials. The articles contain as a flame-retarding addend a product of (a) 50 to 99.5 weight % of a flame-retarding agent physically and chemically stable under extrusion conditions, preferably 75 to 99.5 weight % of a pulverulent, free-flowing ammonium polyphosphate of the general formula H(n-m)+2(NH4)mPnO3n+1 in which n stands for a whole number with an average value of about 20 to 800 and the ratio of m/n is about 1, and (b) about 0.5 to 50 weight % of a cured water-insoluble artificial resin encapsulating the individual particles of the flame-retarding agent or ammonium polyphosphate. The disclosure also relates to difficulty flammable boards veneered with wood or a laminate.