Process for preparing copolymers

Abstract From the Canadian patent

Abstract of the Disclosure: The invention provides a process for preparing copolymers of acetylene and conjugated diene compounds by copolymerization in the presence of a catalyst composition in a reactor. The catalyst composition comprises a dialkyl aluminum halide, an organic nickel compound and an active hydrogen compound, of which the molar concentrations have the following relationships: Al = 2Ni + H, Al/Ni>4, wherein Al, Ni and H represent respectively the molar concentrations of the dialkyl aluminum halide of, the organic nickel compound and of the active hydrogen compound. Using this catalyst copolymers can be obtained in a good yield without the by-production of any gel material.