Patent ID: 6589660
Filing Date: 2003-07-08
Classification: B27N,D04H,Y10T

Abstract:
A weatherable building material product exhibiting less than 12% thickness swelling, comprising heat and pressure consolidated:a) lignocellulosic fibers prepared by refining a partially digested lignocellulosic fiber precursor, said partially digested lignocellulosic fiber precursor containing an in-situ generated primary binder formed by the partial digestion of said lignocellulosic fiber precursor; b) from about 2 weight percent to about 35 weight percent of a phenol/formaldehyde secondary binder resin, said weight percent of binder resin relative to the sum of a) and b); a surface of said product impregnated with one or more non-fugitive tertiary binder(s) which renders said surface water repellant but water vapor transmissive.