Process for the preparation of poly-(-n-alkylimino-alanes)

Details Process for the preparation of poly-(-n-alkylimino-alanes) Process for the preparation of poly-(-n-alkylimino-alanes)

C - Chemistry, Metallurgy

07

F

260/433

C07F 5/06 (2006.01) C08F 36/04 (2006.01) C08G 79/10 (2006.01)

Patent

CA 1062273

ABSTRACT OF THE DISCLOSURE: The invention relates to a process for the preparation of poly-(N-alkyliminoalanes) having the composition (HA1NR) n in which R is an aliphatic radical containing from 1 to 20 carbon atoms, a cycloaliphatic or an aromatic hydrocarbon radical and n ranges from 3 to 50, said process which consists in reacting directly, under inert atmosphere, metallic aluminium with a primary amine in the presence of hydrogen and a promoter selected among alkaline or alkaline-earth metals, hydride derivatives, alkyl derivatives or alanates of metals belonging to the first three groups of the Periodic System or the reaction product itself, said promoter being present in an amount equal to or lower than 5% by mole with respect to aluminium, at a temperature ranging from room one to the product decomposition temperature and at a hydrogen pressure ranging from 1 to 1000 kg/cm , said aluminium being present in an amount equal to or slightly higher than the stoichiometric one with respect to amine. It is now possible to synthetize poly-(N-alkyliminoalanes) through one single stage process which is simpler to carry out since it does not need the previous synthesis of alanate to be reacted with amine. The poly- (N-alkyliminoalanes) are used as cocatalysts active in the synthesis of polyethylene, olefine polymers and highly stereospecific diolefine polymers as well as in the reduction of organic derivatives, even with an asymmetric induction.

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