Mixtures of polypropylene obtained by catalysis of coordination with the product obtained with the aid of free radicals and shaping methods and revêtementsà the aid of these mixtures

摘要

Blends of normally solid branched chain polymers of ethylene of density 0.910 to 0.970, which have been made by free-radical polymerization techniques, and polypropylene in an amount of 3 to 5% by weight of the blend, wherein the polypropylene has a melting point of at least 135 DEG C., a density of 0.870 to 0.920, and a heptane insoluble fraction of at least 70%, are used for coating wire and cables, and making shaped articles such as films and bottles. The polypropylene is made by using Ziegler-Natta type catalysts. The ethylene polymer may be polyethylene, or a copolymer of ethylene with the comonomers mentioned in Specifications 497,643, and 579,844, in particular copolymers of ethylene and vinyl acetate. Specifications 471,590 and 626,155 also are referred to.