Appeal No. 1998-3106
Application 08/679,603
organohydrogenpolysiloxane as used by Schulz, Bilgrien would
have fairly suggested, to one of ordinary skill in the art,
microencapsulating Schulz’s platinum catalyst and using it in
combination with Bilgrien’s organotitanium compound to provide
the benefits of doing so disclosed by Bilgrien, i.e.,
increasing the cure rate of the composition and increasing the
heat stability of elastomers prepared from the composition
(col. 1, line 65 - col. 2, line 3).
Gray discloses a curable composition containing,
similarly to the compositions of the appellants and Schulz,
(A) an alkenyl-containing polydiorganosiloxane curable by a
hydrosilation reaction, and (C) an organohydrogensiloxane
having at least 3
silicon-bonded hydrogen atoms per molecule (abstract; col. 3,
lines 19-22). Like Schulz’s composition, Gray’s composition
includes a platinum group-containing catalyst (col. 3, lines
22-23). Gray teaches that by using an aluminum chelate in
combination with an epoxytrialkoxysilane, the adhesion of the
cured rubber to substrates is enhanced (col. 3, lines 23-31;
col. 7, lines 33-35). Gray further teaches that if adherence
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