Polypropylene blends having high impact strength and improved optical properties

摘要

An impact polypropylene blend having an excellent balance of overall mechanical properties, particularly high impact strength, and significantly improved optical properties, comprising about 2 to about 22% by weight of an ethylene-propylene copolymer elastomer and about 1 to about 15% by weight of a low density polyethylene which are at least partially cured in the presence of polypropylene. The high impact polypropylene blends containing about 70 to about 95% by weight polypropylene have surprisingly good optical properties and are useful for making molded or extruded high clarity articles, such as containers, films, and the like.