WOOD-POLYMER COMPOSITES OF LOW FLAMMABILITY AND METHOD OF THEIR PRODUCTION Russian patent published in 2020 - IPC C08L23/06 C10L5/06 C10L5/14 C10L5/40 

FIELD: production of composite materials.

SUBSTANCE: invention discloses low-flammability wood-polymer composite, characterized by that it contains low-pressure polyethylene, ammonium polyphosphate, wood flour, pre-treated with a fire retardant from urea phosphate, a mixture of borax with boric acid, and antioxidant Irganox 1010, with the following ratio of components, wt %: polyethylene—25.0–30.0; wood flour—45.0–55.0; ammonium polyphosphate—16.5–19.5; fire retardant—3.0–5.0 and antioxidant—0.5. Also disclosed is a method of producing a low-flammability wood-polymer composite, characterized in that wood flour is treated with a solution of a fire retardant from a series: urea phosphate, a mixture of borax with boric acid while stirring and at ambient temperature, dried by air aeration at temperature of 70 °C, components of the wood-polymer composite are mixed in a double-screw extruder at temperature of 180 °C.

EFFECT: obtaining a wood-polymer composite which is characterized by high resistance to combustion and low water absorption.

4 cl, 4 ex, 1 tbl