Appeal No. 1996-2572
Application No. 08/192,077
curing catalysts as specified by claim 25 and carboxylic acid
ester, cyclic organic carbonate, and lactone curing catalysts
as specified by appealed claim 24 are conventional curing aids
used for hardening resole resins when either delayed resole
curing, or alternatively, “cure time” decreases are desirable.
See the abstract of Delay and column 10, lines 58-68 of
Detlefsen respectively. Similarly, Stephan teaches that
oxazolidine methylene donors advantageously provide a longer
“pot life” or working time when combined with a resorcinolic
resin. See Stephan at column 1, lines 64-66. Accordingly, we
agree with the examiner that it would have been prima facie
obvious to a person of ordinary skill in this art to have
utilized these well known resole curing catalysts and
resorcinolic resin methylene donors in the resole/resorcinolic
resin compositions of Daily motivated by a reasonable
expectation that the known advantages attributed to each of
these materials would be realized.
Although appellants contend that evidence of unexpected
results (in terms of faster cure times for the claimed resin
compositions) is present in the record (example 8 and table 8
on page 38 of the specification and the Johnson declaration),
8
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