Difficultly flammable extruded articles, especially extruded...

Details Difficultly flammable extruded articles, especially extruded... Difficultly flammable extruded articles, especially extruded...

B - Operations, Transporting

27

N

154/131, 18/780

B27N 9/00 (2006.01) B27N 3/28 (2006.01) B32B 21/12 (2006.01) C08K 3/32 (2006.01) C08K 9/08 (2006.01) C08L 97/02 (2006.01) C09K 21/12 (2006.01) C09K 21/14 (2006.01) C08L 61/06 (2006.01) C08L 61/28 (2006.01) C08L 63/00 (2006.01) C08L 75/04 (2006.01)

Patent

CA 1248726

DIFFICULTLY FLAMMABLE EXTRUDED ARTICLES, ESPECIALLY EXTRUDED BOARDS, AND DIFFICULTLY FLAMMABLE VENEERED OR COATED EXTRUDED BOARDS, A PROCESS FOR MAKING THEM AND THEIR USES ABSTRACT OF THE DISCLOSURE: The disclosure relates to difficultly 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 physi- cally 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 difficultly flammable boards veneered with wood or a laminate.

466923

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