Appeal No. 1997-1219
Application 08/432,649
The subject matter on appeal relates to an improved
process for manufacturing wood composition boards under heat
and pressure which includes use of a composition comprising a
crosslinking resin and an aqueous dispersion of acrylic
polymer particles having a THF gel content of greater than
about 70% and wherein the particles are formed from a monomer
mixture comprising from about 0.2% to about 5% by weight allyl
methacrylate. This appealed subject matter is adequately
illustrated by independent claim 1, which reads as follows:
1. An improved process for manufacturing wood
composition boards under heat and pressure comprising
providing a fibrous mat, treating the surface of said mat, hot
pressing said mat at elevated temperature and pressure into a
solid composition board product, and releasing said
composition board from said press wherein the improvement
comprises treating the surface of the mat with a composition
comprising a crosslinking resin and an aqueous dispersion of
acrylic polymer particles, wherein said particles have a THF
gel content of greater than about 70% and wherein said
particles are formed from a monomer mixture comprising from
about 0.2% to about 5%, by weight allyl methacrylate based on
the weight of said particles; and whereby the press release
rating of said manufactured wood composition board is superior
to that of a comparative board comprising particles having a
THF gel content of less than about 70%.
The references relied upon by the examiner as evidence of
obviousness are:
Sanfilippo et al. (Sanfilippo) 4,336,174 Jun. 22,
1982
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