Verfahren zur Herstellung von polymeren Mischungen auf Basis von EP(D)M-Elastomeren

摘要

Process with two or more steps for the preparation in suspension of mixtures of ethylene-propylene (EPM) elastomer homopolymers or ethylene-propylene-diene (EPDM) elastomer terpolymers in the presence of a catalytic system essentially consisting of a compound of Vanadium and a cocatalyst essentially consisting of an Aluminium alkyl and in the presence of an activator, the above process being characterised in that: a) in the first step a first polymerisation of the monomers is carried out in the presence of the Vanadium based catalyst; b) in the second or subsequent steps further polymerizable monomers and activator are added to the suspension of the polymer obtained in step (a).