ETHYLENE/ALPHA-OLEFIN COPOLYMER MADE WITH A NON-SINGLE-SITE/SINGLE-SITE CATALYST COMBINATION, ITS PREPARATION AND USE

摘要

An ethylene/.alpha.-olefin copolymer comprising a component produced by a no n- single-site polymerization catalyst and a component produced by a single-sit e polymerization catalyst, its preparation and use are described. The copolyme r has an .alpha.-olefin content of 5 to 20 percent by weight and shows at leas t two CRYSTAF peak temperatures differing by at least 15 ~C and/or at least tw o DSC melting peak temperatures differing by at least 15 ~C.