Appeal No. 1997-2873
Application 08/417,858
(c) silica and/or silicate powder having a BET specific surface area of 50 to 100 m2/g;
said formula I is as follows:
where R is an alkyl group having 1 to 4 carbon atoms or an alkoxy group having 1 to 4 carbon
atoms; R1 is an alkyl group having 1 to 4 carbon atoms or phenyl group; n is 0, 1 or 2; R2 is a
divalent straight-chained or branched hydrocarbon radical having 1 to 6 carbon atoms; R3 is an
arylene group having 6 to 12 carbon atoms; m and p are respectively 0 or 1 but not 0 at the same
time; q is 1 or 2; and B is –SCN or –SH when q is 1 or B is –Sx– when q is 2, where x is an
integer of 2 to 8;
and said formula II is as follows:
where R is an alkyl group having 1 to 4 carbon atoms or an alkoxy group having 1 to 4 carbon
atoms; R1 is an alkyl group having 1 to 4 carbon atoms or phenyl group; n is 0, 1 or 2; R4 is a
monovalent straight-chained or branched unsaturated hydrocarbon radical having 2 to 20 carbon
atoms.
The appealed claims, as represented by claim 1, are drawn to a vulcanizable rubber
composition comprising at least the ethylene-propylene-nonconjugated diene copolymer rubber
(EPDM), a sufficient amount of a crosslinking system capable of crossing the rubber, at least one
of the alkoxysilane compounds of the Formula I or II, and silica and/or silicate powder having the
specified BET specific surface area. According to appellants, the claimed vulcanizable rubber
compositions have properties that make them “suitable for applications such as automobile tires
and vibration-proof rubber” (specification, page 1; see also pages 17-19).
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