METHOD FOR PREPARING ELASTOMERIC COPOLYMERS OF ETHYLENE AND A-OLEFINS

摘要

PURPOSE: A producing method of an elastomeric copolymer of ethylene and alpha-olefin is provided to improve a catalyst activation and a copolymerization reactivity with the alpha-olefin. CONSTITUTION: A producing method of an elastomeric copolymer comprises a step of copolymerizing ethylene and an alpha-olefin monomer under the presence of a catalyst composition including a transition metal compound catalyst marked as chemical formula 1 among single reactors or a secondary serial reactors to obtain the copolymer with the density of 0.850~0.910 grams per cc. The catalyst composition contains a cocatalyst selected from the group consisting of the transition metal compound, an aluminoxane compound, an alkylaluminum compound, a boron compound and their compounds.