Chemistry of carbon compounds – Miscellaneous organic carbon compounds – C-metal
Patent
1997-01-03
1998-03-24
Shaver, Paul F.
Chemistry of carbon compounds
Miscellaneous organic carbon compounds
C-metal
526335, 526340, C07F 102
Patent
active
057309108
ABSTRACT:
A method of preparing polymetalated compositions and the use of such polymetalated compounds as catalysts in polymerization reactions are described. The process comprises reacting (A-1) an allenic compound of the formula R.sup.2 --CH.dbd.C.dbd.CH.sub.2 wherein R.sup.2 is hydrogen or an aliphatic group containing from 1 to about 10 carbon atoms with (A-2) an organometallic compound R.sup.o M in a mole ratio of about 1:2 to about 1:6 wherein R.sup.o is a hydrocarbyl group and M is an alkali metal.
A method of preparing a hydrocarbon-soluble polymetalated compositions also is described, and this process comprises the steps of
(A) preparing an intermediate by reacting (A-1) an allenic compound of the formula R.sup.2 --CH.dbd.C.dbd.CH.sub.2 wherein R.sup.2 is hydrogen or an aliphatic group containing from 1 to about 10 carbon atoms with (A-2) an organometallic compound R.sup.o M in a mole ratio of about 1:2 to about 1:6 wherein R.sup.o is a hydrocarbyl group and M is an alkali metal; and
(B) reacting said intermediate with a 1,3-conjugated diene wherein the mole ratio of the 1,3-conjugated diene to the allenic compound is at least about 2:1.
The hydrocarbon-soluble polymetalated compositions prepared by the method of the present invention are useful as catalysts in anionic polymerizations.
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Bridgestone/Firestone Inc.
Shaver Paul F.
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