СМОЛЫ НА ОСНОВЕ ПОЛИЭТИЛЕНА ВЫСОКОЙ ПЛОТНОСТИ (ПЭВП) ДЛЯ ПРИМЕНЕНИЯ В НАПОРНЫХ ТРУБАХ И ПОДОБНЫХ ПРИМЕНЕНИЙ

摘要

The present invention provides bimodal polyethylene resins in which the high molecular weight ethylene copolymer component typically has a relatively narrow molecular weight distribution, with short chain branching content being substantially constant across its molecular weight distribution. The resins of this invention are typically characterized by improved toughness and resistance to slow crack propagation properties making them useful for pressure pipe applications.