Polyethylene and Catalyst Composition for its Preparation
申请人:Mihan Shahram
公开号:US20070213205A1
公开(公告)日:2007-09-13
Polyethylene which comprises ethylene homopolymers and copolymers of ethylene with α-olefins and has a molar mass distribution width M
w
/M
n
of from 6 to 100, a density of from 0.89 to 0.97 g/cm
3
, a weight average molar mass M
w
of from 5000 g/mol to 700 000 g/mol and has from 0.01 to 20 branches/1000 carbon atoms and at least 0.5 vinyl groups/1000 carbon atoms, wherein the 5-50% by weight of the polyethylene having the lowest molar masses have a degree of branching of less than 10 branches/1000 carbon atoms and the 5-50% by weight of the polyethylene having the highest molar masses have a degree of branching of more than 2 branches/1000 carbon atoms, a process for its preparation, catalysts suitable for its preparation and also fibers, moldings, films or polymer blends in which this polyethylene is present.