UNSATURATED COPOLYMER OF ETHYLENE AND PROCESS FOR PREPARING THE SAME

摘要

A novel unsaturated copolymer of ethylene comprises a random copolymer of (i) ethylene, (ii) an .alpha.-olefin of 3 to 20 carbon atoms and (iii) at least one straight chain or branched chain nonconjugated triene or tetraene having one vinyl group in the molecule, which contains 30 - 92 % by mol of ethylene units (i), 6 - 70 % by mol of .alpha.-olefin units (ii) and 0.1 - 30 % by mol of triene or tetraene units (iii), and which has a molar ratio of ethylene units (i) to .alpha.-olefin units (ii) of 40/60 to 92/8 (ethylene units (i)/.alpha.-olefin units (ii)) and an intrinsic viscosity (?), measured in Decalin at 135 .degree.C, of 0.05 to 10 dl/g. This novel unsaturated copolymer of ethylene is excellent in weathering resistance, heat resistance and ozone resistance and has a high vulcanizing rate.