Appeal No. 1997-0956
Application No. 08/313,488
Claim 1 is representative of the subject matter on appeal
and reads as follows:
1. A process for the production of a soft composite in a
closed mold comprising:
a) applying a composition which forms a soft
elastomer that includes a prepolymer of diphenylmethane
diisocyanate having an NCO content of from about 8 to about
17% by weight and at least one isocyanate-reactive
compound with at least two isocyanate-reactive groups to the
interior walls of the open mold:
b) introducing a composition which is made up of
1) a mixture of diphenylmethane diisocyanates
and/or polyisocyanates having an NCO content
of from about 32.0 to about 32.8 which
isocyanates are not prepolymers,
2) a polyol mixture having a functionality of at
least two and molecular weight of from about
400 to about 8,000,
3) a blowing agent,
4) an amine catalyst, and
5) an amine crosslinking agent
and will react to form a low density, high resiliency,
flexible foam under molding conditions in an amount such
that the formed foam will fill the mold into the mold in
a manner such that this composition will be substantially
completely within the elastomer-forming composition
present on the mold walls;
c) closing the mold
and
d) allowing the composition introduced in b) to form
3
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