Appeal No. 1998-2425 Page 6
Application No. 08/656,871
depending therefrom would have a core formed of the
polymerized butyl acrylate that is at least partially encased
by a shell made of a copolymer of the phased in (meth)acrylic
acid and butyl acrylate as urged by appellants in their
briefs.
On the other hand, Kowalski (abstract, lines 1-8) is
directed to:
the production and use of water-insoluble
particulate heteropolymers made by sequential
emulsion polymerization in dispersed particles of
which a “core” of a polymeric acid is at least
partially encased in a “sheath” polymer that is
permeable to a volatile base, such as ammonia or an
organic amine, adapted to cause swelling of the core
by neutralization.
As described at column 5, line 9 through column 8, line 9
and column 8, line 53 through column 9, line 2 of Kowalski,
the core polymer of the applied reference is formed by
polymerizing one or more acid monomers with or without a
plethora of monoethylenically unsaturated monomers, such as
butyl acrylate. Thus, the product of Kowalski would
reasonably be expected to have a polymerized acid monomer
present throughout the core since an acid monomer is used
throughout the formation of the core of Kowalski.
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