C - Chemistry – Metallurgy – 08 – F
Patent
C - Chemistry, Metallurgy
08
F
402/446, 252/56
C08F 4/12 (2006.01) C08F 4/52 (2006.01) C08F 36/04 (2006.01)
Patent
CA 1143711
Abstract of the Disclosure A catalyst consisting of: A) A rare earth carboxylates corresponding to the following general formula Image B) an aluminium alkyl AIR43 and/or R2 AlH, C) a Lewis acid, wherein M represents a trivalent rare earth element having an atomic number of from 57 to 71 R1, R2, and R3, which may be the same or different, represent an alkyl group having from 1 to 10 carbon atoms, the sum of all the carbon atoms in the substituents R1, R2 and R3 being from 6 to 20, and R4 represents an alkyl group having from 1 to 10 carbon atoms, can be used for polymerizing butadiene in solution. It is prepared by mixing the components A, B and C in an inert organic solvent at a temperature in the range of from -30°C to 80°C.
339569
Marwede Gunter
Sylvester Gerd
Witte Josef
Aktiengesellschaft Bayer
Fetherstonhaugh & Co.
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