Appeal No. 1998-1737
Application No. 08/318,702
paragraph). The examiner's reliance on Hung and Münzmay for
disclosing polyurethane adhesive compositions for bonding
fiberglass-reinforced polyester substrates does not remedy the
basic deficiency of Hoeschele.
The examiner's rejection of claims 54 and 57-59 over Münzmay
in view of the Encyclopedia of Polymer Science and Engineering is
another matter. Appellants maintain that:
The Münzmay reference does not teach or suggest a
polyurethane adhesive wherein the polyol component used
to prepare the polyurethane prepolymer contains up to
20 percent crystalline polyester polyol and the
remainder of the polyol is a polyether polyol, nor does
the reference teach that the polyester polyol should
have a melting point or softening point of from 35°C
to 80°C.
(Page 10 of principal brief, second paragraph). However, claim
57 on appeal recites that such a mixture of polyester polyols and
polyether polyols is an alternative embodiment (the word "or"
precedes the relevant recitation). As apparently conceded by
appellants, Münzmay discloses a latently reactive polyurethane
adhesive comprising a polyurethane with blocked isocyanate groups
and polyurethane preproducts of polyols and polyamines. Appealed
claim 59, as well, does not require the argued mixture of
polyester and polyether polyols. Rather, claim 59 encompasses a
latently reactive polyurethane adhesive comprising one or more
polyurethanes with free isocyanate groups. Although Münzmay
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