preparation process of conjugated diolefins on homopolymers and copolymers of conjugated diolefins and vinyl aromatic compounds with other diolefins.

摘要

process for the preparation of conjugated diolefins on homopolymers and copolymers of conjugated diolefins with other diolefins or with vinyl aromatic compounds.through which polymerize on the above monomers using a catalytic composition comprising essentially (a) a complex organic compound of magnesium, (b) an organic compound oflluminio and (c) an organic compound of phosphorus p (v) or p (iii) metal barium, strontium or calcium.the process according to the invention makes it possible to produce on homopolymers of 1,3-butadiene and styrene butadiene copolymers (random, with high content of trans 1,4 - addition.more than 70% and addition occasions less than 5%. it allows the preparation of block copolymers of these monomers.