Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Reexamination Certificate
2007-09-20
2011-10-25
Lipman, Bernard (Department: 1762)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
C525S332100, C525S339000
Reexamination Certificate
active
08044149
ABSTRACT:
Provision of, in a process of producing a hydrogenated polymer, which comprises steps of sequentially performing, in the presence of a ruthenium carbene complex, a ring-opening metathesis polymerization reaction of a cyclic olefin and a hydrogenation reaction of a ring-opening metathesis polymer produced by the polymerization reaction to give a hydrogenated polymer, a simple and economic process of obtaining a hydrogenated polymer having an extremely small content of residual ruthenium derived from the ruthenium carbene complex.A process of producing a hydrogenated polymer, which comprises, in the presence of a ruthenium carbene complex, subjecting a cyclic monoolefin and/or a cyclic diolefin to a ring-opening metathesis polymerization, hydrogenating the resulting ring-opening metathesis polymer to give a hydrogenated polymer, and bringing the hydrogenated polymer in contact with a poor solvent of the hydrogenated polymer in the presence of dissolved hydrogen to allow precipitation. As the poor solvent of the hydrogenated polymer, alcohol having 1 to 6 carbon atoms, ketone having 3 to 6 carbon atoms and the like are preferable.
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Inubushi Yasutaka
Iwasaki Hideharu
Kuraray Co. Ltd.
Lipman Bernard
Oblon, Spivak McClelland, Maier & Neustadt, L.L.P.
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