Appeal No. 1999-2507
Application No. 08/967,367
For these reasons and those set forth in the examiner's
answer, we uphold the examiner's rejection on this ground.
Eichenauer
Eichenauer describes a thermoplastic molding composition
comprising: (A) from 5 to 95% by weight of a graft product of a
mixture of from 50 to 100 parts by weight of styrene, o-
methylstyrene, vinyl toluene, p-methylstyrene, methyl
methacrylate, or mixtures thereof and from 5 to 40 parts by
weight of acrylonitrile on a particulate silicone rubber having a
specific average particle diameter and rubber content; and (B)
from 5 to 95% by weight of a graft product of a mixture of from
50 to 100 parts by weight of styrene, á-methylstyrene, vinyl
toluene, p-methylstyrene, methyl methacrylate, or mixtures
thereof and from 0 to 50 parts by weight of acrylonitrile on a
particulate EPDM rubber having a specific average particle
diameter and rubber content. (Column 1, lines 30-56.)
Eichenauer further teaches that suitable silicone rubbers include
core/shell materials such as particulate silicone rubbers which
are covered by a shell of crosslinked acrylate rubber or
particulate silicone rubber containing a core of crosslinked
acrylate rubber or styrene/acrylonitrile copolymer. (Column 2,
lines 23-33.) Also, Eichenauer teaches that the EPDM include
polymers of ethylene and propylene containing small quantities of
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