Olefin copolymers and processes for preparing same

摘要

A propylene random copolymer comprising structural units (a) derived from propylene, structural units (b) derived from ethylene and structural units (c) derived from alpha -olefin of 4 to 20 carbon atoms, and having (i) the structural units (a) in an amount of 90 to 99 mol%, the structural units (b) in an amount of 0.5 to 9.5 mol% and the structural units (c) in an amount of 0.5 to 9.5 mol%, (ii) an intrinsic viscosity Ä eta Ü as measured in decalin at 135 DEG C of 0.5 to 6 dl/g, (iii) a melting point ÄTmÜ as measured by a differential scanning calorimeter falling within the range of $wherein\; P\; is\; the\; propylene\; content\; (mol\%)\; present\; in\; the\; copolymer,\; and\; (iv)\; a\; boiling\; trichloroethylene-insoluble\; content\; of\; less\; than\; 5\%\; by\; weight.$