Appeal No. 96-1790
Application No. 08/285,375
Watanabe) shows that Kronitex PB-370 or
tris(tribromoneopentyl) phosphate is a flame retardant
customarily used in the art of molding compositions. See
Green, page 8, where polypropylene combined with “PB-370"
flame retardant is used as a “molding resin”. Watanabe is
directed to molding compositions with a polycarbonate base,
including thermoplastic polyesters and ABS graft polymers (see
column 1, lines 11-20; column 3, lines 14-24).
Appellant argues that there is nothing in Green’s
disclosure relative to aliphatic brominated phosphates that
would point to their desirability as components in halogenated
polycarbonate, polyester, and graft polymer compositions for
the purpose of obtaining improved chemical resistance (Brief,
page 5). Appellant’s argument is not well taken since the
purpose for the combination in the prior art does not have to
be the same as appellant’s purpose. In re Kemps, 97 F.3d
1427, 1430, 40 USPQ2d 1309, 1311 (Fed. Cir. 1996).
Appellant also argues that Watanabe teaches that all
phosphorus compounds are equivalents for flame retardancy and
includes a large number of particular phosphates (Brief, page
5). Appellant’s argument is not persuasive since the number
7
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