Appeal No. 1997-3492
Application No. 08/428,994
(2) Claims 1, 2, 4-7 and 15-25 are rejected under 35
U.S.C. § 103 as being unpatentable over Powers with Delseth.
Discussion
The claims on appeal are directed to a crosslinkable
composition comprising a mixture of a halogenated elastomer
selected from chlorinated or brominated interpolymers of a C4
to C isoolefin and a para-alkylstyrene comonomer, a
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crosslinking agent and an accelerator compound. The claimed
accelerator compounds contain one or more groups of the
formula -S-SO -OM attached to a hydrocarbon radical or to an
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organic bridging group wherein M is a monovalent metal, the
equivalent of a multivalent metal, a monovalent ion derived by
the addition of a proton to a nitrogenous base, or the
equivalent of a multivalent ion derived by the addition of two
or more protons to a nitrogenous base.
Delseth discloses a vulcanizable rubber composition
comprising a cis-polyisoprene, a sulphur vulcanizing agent,
thiazole-based vulcanization accelerators and adhesion
promoters. The adhesion promoters of Delseth are said to be
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