| abstract |
PROBLEM TO BE SOLVED: To provide polyethylene having excellent process suitability for slurry polymerization, good morphology, low-density polyethylene molding processability, high-density polyethylene and linear low-density polyethylene mechanical strength, and melt stretchability, and a method for producing the same provide. (Step I) A macromonomer is polymerized by polymerizing ethylene and optionally an olefin having 3 or more carbon atoms in a slurry state using a catalyst comprising a metallocene compound, a modified clay compound and, if necessary, an organoaluminum compound. After the production, (Step II) a catalyst containing a metallocene compound as a main component is added continuously, and ethylene, the macromonomer produced in (Step I), and optionally an olefin having 3 or more carbon atoms are in a slurry state. Copolymerize. [Selection figure] No selection figure |