PROPYLENE COPOLYMER FOAMS AND THEIR USE

摘要

This invention relates generally to foamable crystalline propylene polymers obtained from metallocene catalysis and to their methods of production. The foamed crystalline propylene polymers have molecular weight distributions and densities that fall within broad ranges. The crystalline propylene polymers may be prepared in a multiple stage polymerization process using a combination of metallocene components in at least two stages.