| abstract |
(57) [Summary] [Structure] Formula I The syndiotactic propylene copolymer is obtained in high yield by polymerizing propylene and a small amount of ethylene or olefin in the presence of (wherein M 1 is Ti, Zr, Hf, V, Nb, Ta). [Effect] It shows high molecular weight, narrow molecular weight and high syndiotactic property, low melting point, rubber behavior, and molded articles obtained from this exhibit high transparency, flexibility, tensile strength, surface gloss, Applied for all kinds of packaging. |