Patent ID: 6462135
Filing Date: 2002-10-08
Classification: C08L,Y10T

Abstract:
A low-odor polyethylene blend comprising(a) from 30 to 90% by weight of a high-molecular-weight ethylene copolymer with a melt flow rate MFR 190/21.6&lE;1.5 g/10 min, a density &lE;0.950 g/cm3, a weight-average molecular weight Mw&gE;300,000 g/mol and a polydispersity Mw/Mn of from 1 to 10, obtainable by polymerization in the presence of a Ziegler catalyst and (b) from 10 to 70% by weight of a low-molecular-weight ethylene homopolymer or ethylene copolymer with a melt flow rate MFR 190/2.16 of from 20 to 100 g/10 min, a density &gE;0.95 g/cm3, a weight-average molecular weight Mw of from 8000 to 80,000 g/mol and a polydispersity Mw/Mn of from 2.5 to 12, obtainable by polymerization in the presence of a chromocene catalyst on a metal oxide support, where the Al content of the high-molecular-weight component is from 5 to 60 ppm, the Al content of the low-molecular-weight component is from 0 to 5 ppm and the Al content of the blend is from 1 to 55 ppm.