Appeal No. 1998-3106
Application 08/679,603
to plastic is desired, it is advantageous to include a
tetraalkyltitanate, an alkylpolysilicate, and an acrylate or
methacrylate in the composition (col. 8, lines 19-22). Gray’s
composition is similar to that of Schulz in that it comprises
an alkenyl-containing polyorganosiloxane curable by a
hydrosilation reaction, an organohydrogensiloxane having at
least 3 silicon-bonded hydrogen atoms per molecule, and an
organosilicon compound having epoxy and alkoxy
functionalities. Hence, Gray would have fairly suggested, to
one of ordinary skill in the art, including in Schulz’s
composition an aluminum chelate in order to provide the
enhanced adhesion disclosed by Gray (col. 7, lines 34-36).
Gray additionally would have fairly suggested, to one of
ordinary skill in the art, including in Schulz’s composition
Bilgrien’s organotitanium compound, in combination with an
alkylpolysilicate and an acrylate or methacrylate (col. 8,
lines 19-23), to enhance adhesion to plastics which is a type
of substrate used by Schulz (col. 8, lines 54-57).
For the above reasons, we conclude that the claimed
invention would have been prima facie obvious to one of
ordinary skill in the art over the applied prior art.
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