Patent ID: 6306241
Filing Date: 2001-10-23
Classification: B27N,C08L

Abstract:
A method of preparing lignocellulosic composites comprising the steps of:(a) preparing a mat having a moisture content of from about 4.5% to less than about 8% based on the dry mat weight including the steps of mixing or blending a furnish, an ammoniated hydrogen peroxide compound, wax, and a binding resin; and(b) hot pressing the mat in a hot press having at least a platen until the mat is cured;wherein the core temperature of the mat increases such that within the first 3 minutes of hot pressing the core temperature of the mat is at least 140.degree. C. at a hot press temperature of from about 180.degree. C. to about 23.degree. C.;wherein the furnish is selected from the group consisting of wood furnish, straw, bagasse, wood bark, recycled wood fiber, recycled paper fiber, and mixtures thereof;wherein the ammoniated hydrogen peroxide is prepared by mixing a hydrogen peroxide solution with ammonia water that contains a metal chelating agent;wherein the wax is selected from the group consisting of molten slack wax, vegetable wax, and paraffin wax, including aqueous emulsion versions; andwherein the binding resin is a phenol-formaldehyde resin.