Appeal No. 1997-0005
Application 08/340,966
This is an appeal pursuant to 35 U.S.C. § 134 from
the final rejection of claims 1 through 7, all claims pending
in this application.
Representative claims 1 and 7 are reproduced below:
1. A method to hydrogenate a polymer containing
ethylenic unsaturation comprising the method comprising the
steps of:
providing a solution or suspension of the polymer
containing ethylenic unsaturation with an amount of Group VIII
metal alkoxide or carboxylate and metal alkyl hydrogenation
catalyst effective to permit hydrogenation of the ethylenic
unsaturation upon exposure to hydrogen;
exposing the polymer solution or suspension to a
hydrogen partial pressure for a time period sufficient to
hydrogenate greater than about 90 percent of the ethylenic
unsaturation;
adding additional Group VIII metal alkoxide or
carboxylate and metal alkyl hydrogenation catalyst to the
polymer solution or suspension after greater than about 90
percent of the ethylenic unsaturation has been hydrogenated,
the amount of additional Group VIII metal alkoxide or carbox-
ylate and metal alkyl hydrogenation catalyst effective to
improve separation of hydrogenation catalyst metal from the
polymer solution;
mixing the hydrogenated polymer solution or suspen-
sion with additional Group VIII metal alkoxide or carboxylate
and metal alkyl hydrogenation catalyst with an aqueous solu-
tion of an acid; and
2
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