Appeal No. 2000-0343
Application 08/849,008
prepare them for the manufacture of a finished product such as
particle board, and toward a process for making particle board
from the treated lignocellulosic particles. Claims 1 and 23
are illustrative:
1. 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
(c) after step (a) or step (c), removing the solvent.
23. A process of making a particle board from particles
of a lignocellulosic material treated according to the method
of any one of claims 1, which process includes the steps of:
(i) impregnating a sheet or sheets of a lignocellulosic
material with a composition comprising a thermosetting resin,
an extending liquid for the thermosetting resin and where
necessary a catalyst for the thermosetting resin;
(ii) recovering the extending liquid;
2
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