High-molecular polypropylene with a broad distribution of the molecular weight and a short isotactic sequence length

摘要

Propylene polymers containing from 0 to 2.5% by weight of C2-C10-olefin comonomers have an Mw of from 350,000 to 1,000,000 g/mol, an Mw/Mn of from 4 to 10, a proportion by weight of the polymer fraction having a viscosity number of from 500 to 1400 ml/g of from 20 to 80% of the total polymer and a proportion by weight of a polymer fraction having a viscosity number of from 200 to 400 ml/g of from 80 to 20% of the total polymer and an isotactic sequence length of from 50 to 100.