Enoxy Chimica S.p.a.

Enichem Polimeri

Mario Bruzzone

Arnaldo Roggero

Alberto Gandini

Antonio Carbonaro

Domenico Ferraro

Coupling agents of general formula ##STR1## and their use in a method for the termination of living polymers obtained by anionic polymerization of diene and/or vinylaromatic monomers.

Method for the termination of living polymers, and compounds suitable

Multifunctional anionic initiators having the general formula: ##STR1## and process for synthesizing said initiators and their use in polymerizing dienic monomers and for making block polymers.

Multifunctional anionic initiators and their use

An improved process is described for preparing conjugate diolefin polymers or copolymers having a high content of 1,4-cis units and high chain linearity, the process using a particular catalytic system prepared from a compound of a metal chosen from those of Group III B of the Periodic System which have an atomic number of between 21 and 103, preferably neodymium, an organic halogen derivative, and an aluminium alkylhydride or trialkyl.

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S. Donato Milanese, Italy

Mario Bruzzone