Appeal No. 2004-2208
Application No. 10/158,988
The subject matter on appeal relates to a process for the
production of a polyurethane/urea in solution (claims 1-4 and 6-
14) and to a polyurethane/urea produced by such a process
(claims 15-21). Further details of this appealed subject matter
are recited in representative claims 1, 4, 15, and 16 reproduced
below:
1. A process for the production of a
polyurethane/urea in solution comprising
a) reacting
1) a diisocyanate with
2) an isocyanate-reactive component
comprising
(i) a diol component comprising
(a) from about 10 to about 100
equivalent percent of at least
one polyoxypropylene diol having
a number average molecular
weight of at least about 1500 Da
and an average unsaturation
level less than or equal to 0.03
meq/g,
(b) up to 90 equivalent percent of
at least one polytetramethylene
glycol having a number average
molecular weight of at least 200
Da, and optionally,
(ii) an isocyanate-reactive material which
is different from 2)(i)(a) and
2)(i)(b),
in the presence of
3) a catalyst which promotes linear
polymerization but does not cause
degradation of a polymer produced
therewith under processing conditions,
in amounts such than an NCO prepolymer having an NCO
group content of from about 1.0 to about 3.75% will be
formed, and
2
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