| abstract |
Supported solid catalyst usable for the polymerisation and the copolymerisation of conjugated dienes, based on the product of reaction of A) a solid MgCl2 support, B) an ether and preferably THF, as swelling agent for the support, C) a metal salt chosen from the metals which have an atomic number between 57 and 71 inclusive or 92 in the Periodic Table of the elements and, if the metal salt is not a halide, D) a halogenating agent chosen from the group consisting of an aluminium halogen compound or a halogen compound not containing aluminium, the reaction solid being free from swelling agent, plus E) an organic aluminium derivative which is obligatory when the halogenating agent is not an aluminium halogen compound and optional when the halogenating agent is an aluminium derivative. The invention also relates to a process for the preparation of this catalyst. |