Patent ID: 6335058
Filing Date: 2002-01-01
Classification: B27N,C04B,C08K,C08L,D21H,Y02W

Abstract:
A method of improving the water resistance of a length of lignocellulosic material including the steps of:(a) impregnating the length of lignocellulosic material through its depth with an impregnating composition comprising a solution of: (i) a mineral oil; (ii) an isocyanate thermosetting resin or precursor thereof and, if necessary, a catalyst therefor; and (iii) a non-aqueous solvent for the mineral oil and for the thermosetting resin and catalyst therefor; (b) removing the non-aqueous solvent from the product of step (a); and (c) subjecting the product of step (b) to an elevated temperature to polymerise the thermosetting resin to bind the mineral oil into the lignocellulosic material.