Appeal No. 1998-2425 Page 3
Application No. 08/656,871
emulsifier, in the aqueous phase, under heating
and in the presence of at least one water-
soluble initiator (IN) of formula (I)
M R1
where M represents an alkali metal cation,
and
R represents an anion of a peroxyacid or
1
azo-group-containing acid,
wherein said (IN) is present in an amount
of 0.5-1.5 wt.% based on weight of the monomers;
emulsifying-in (meth)acrylic acid while
maintaining an elevated reaction temperature
such that the ratio of butyl acrylate to
(meth)acrylic acid ranges from 99.5:0.5 to 90:10
parts by weight; and
adding a second redox initator (RI) to
complete the polymerization and wherein said
process is carried out under conditions of core
and shell polymerization.
The sole prior art reference of record relied upon by the
examiner in rejecting the appealed claims is:
Kowalski et al. (Kowalski) 4,427,836 Jan. 24,
1984
Claims 16-24 and 35 stand rejected under 35 U.S.C. § 103
as being unpatentable over Kowalski.
OPINION
In reaching our decision in this appeal, we have given
careful consideration to the appellants' specification and
claims, to the prior art reference as applied by the examiner,
and to the opposing viewpoints advanced by the appellants and
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