Appeal No. 95-4036
Application No. 08/137,332
wherein the dispersing agent disperses the product copolymer
in the dispersing medium; and
(c) continuously recovering the dispersed product
copolymer and the dispersing agent from the second
polymerization reactor.
The prior art relied upon by the examiner is:
Markle et al. (Markle) 4,098,980 Jul. 4, 1978
Gunesin et al. (Gunesin) 4,829,135 May 9, 1989
The sole issue in this appeal is whether claims 1-20 were
properly rejected under 35 U.S.C. § 103 as being unpatentable
over the combination of Markle and Gunesin.
The claimed invention
The claims relate to a continuous, non-aqueous dispersion
polymerization process for producing a copolymer. The process
of claim 1 comprises the following steps:
(a) continuously adding to a first polymerization
reactor: (1) a first monomer charge containing a first
conjugated diene monomer and a first vinyl aromatic monomer,
(2) an organolithium polymerization initiator and (3) a
dispersing medium, and polymerizing the monomer charge to form
a first block of a dispersing agent soluble in the dispersing
medium;
(b) continuously adding to a second polymerization
3
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