METHOD FOR PRODUCTION OF WOOD PARTICLE BOARDS Russian patent published in 1997 - IPC

FIELD: woodworking, furniture and construction industries. SUBSTANCE: method includes mixing of wood particles with combined binder based on carbamide-formaldehyde resin and butadiene-styrene latex solidified with ammonium chloride, formation of mat and hot press molding. Prior to mixing wood particles with binder introduced into carbamide-formaldehyde resin is adhesive latex composition based in butadiene-styrene carboxylate latex and also active filler - aerosil and hardener in the following amounts, mas.%: resin, 61.8-75.0; adhesive latex composition, 21.4-27.4; aerosil, 2.0-10.0; hardener, 0.8-1.6. The wood particle boards produced by the offered method correspond to Class E 1 by formaldehyde liberation. EFFECT: higher efficiency. 1 tbl