Selective catalytic process for preparing N-halothiosulfonamide modified EPDM terpolymers

摘要

A catalyst composition is provided which comprises at least one specified metal salt of a weak acid and a zinc salt of a weak acid or an iron salt of a weak acid. A process for preparing a N-halothio-sulfonamide-modified terpolymer of ethylene, an alpha olefin and a diene utilizing the catalyst is also provided. The catalyst is a selective catalyst in this process.