Appeal No. 1998-3106
Application 08/679,603
Bilgrien discloses a curable organosiloxane composition
which comprises (letter designations of components correspond
to those in the appellants’ claim 1 and those given above to
the components in Schulz): (A) an organopolysiloxane
containing an average of at least two terminally unsaturated
hydrocarbon radicals per molecule; and (C) an amount of an
organohydrogen polysiloxane sufficient to cure the
organopolysiloxane to an elastomer in the presence of a
hydrosilation catalyst (col. 2, lines 12-19). The composition
also contains an amount of a microencapsulated platinum-
containing hydrosilation catalyst sufficient to promote curing
of the composition, and (D)(b) an amount of an organotitanium
compound sufficient to increase the cure rate of the
composition (col. 2, lines 20-28). Bilgrien teaches that the
combination of the microencapsulated platinum-containing
catalyst and organotitanium compound has the further benefit
of increasing the heat stability of elastomers prepared from
the composition (col. 1, line 65 - col. 2, line 3). Because
Bilgrien’s microencapsulated platinum-containing catalyst and
organotitanium compound are used in combination with a vinyl-
containing polyorganosiloxane and an
-5-5
Page: Previous 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Next
Last modified: November 3, 2007