Patent ID: 6451153
Filing Date: 2002-09-17
Classification: B29C,B29K,B32B,C04B,C08H,C08L,Y10T

Abstract:
A method of preparing particles of a lignocellulosic material for the manufacture of a finished product includes the steps of:(a) chemically modifying the lignocellulosic material by impregnating the lignocellulosic material with an impregnating composition comprising a dicarboxylic anhydride or a tricarboxylic anhydride dissolved in a suitable non-aqueous solvent; (b) applying to the particles an adhesion promoter to promote the adherence of a thermoplastic resin to the surfaces of the particles of lignocellulosic material; (c) applying to the particles a thermoplastic resin in dry powder form, so that after the application of the adhesion promoter, the thermoplastic resin adheres to the surfaces of the particles of lignocellulosic material, the thermoplastic resin having been surface modified by irradiation or by fluorination; and (d) after step (a) or step (c), removing the solvent.