Bifunctional Nickel-or Cobalt-containing Catalyst-stabilizers for Polybutadiene Production and Stabi

The analysis of literature data has given strong evidence that the use of Ni and Cooraganic dithioderivatives, as components of bifunctional catalysts, not only catalyzes the polymerization process, but it protects the system from oxidative ageing as well. As part of the continuing work of the first part for the present research work, studies have been carried out on the stabilizing properties of cobalt-containing catalytic dithiosystems (Co-dithiophosphates + DEAC) in the processes of 1,4-cis polybutadiene (PBD) thermal and photodegradation. To reach the most effective combination of the catalytic and stabilizing properties of catalysts, it is necessary to introduce into the complex the ligands of functional groups and the dithio groups as well to provide synergistic effect of thermo and photooxidative stability. The above system’s effectiveness has been confirmed to surpass the activity of the pure cobalt dithiophosphates and the antioxidant Agidol (NG-2246) used in industry.