C - Chemistry – Metallurgy – 08 – F
Patent
C - Chemistry, Metallurgy
08
F
252/109, 402/643
C08F 210/16 (2006.01) C08F 4/64 (2006.01)
Patent
CA 1072247
Abstract of the Disclosure A high molecular weight copolymer of ethylene and a C3 - C20 .alpha.-olefin which, after being molded at room temperature and pressure-free tempered at 120 to 250°C and thereafter cooled, provides molded articles having an ultimate tensile strength of more than 200 kg per square centimeter measured at 120°C and an impact strength of more than 200 kg cm/cm2 measured at 23°C; a process for the preparation of such a copolymer by a Ziegler catalysis which process is characterized in that the catalyst which is employed is one obtained by reducing a titanium-(IV)-halide with an organoaluminum compound in an inert solvent such that the concentration of titanium-(III)- halide so forced amounts to 30 to 200 m mol/liter solvent, the C3 - C20 .alpha.-olefin is employed in an amount of 0.05 to 5 weight percent based upon the weight of the ethylene and the catalyst is either initially contacted with C3 - C20 .alpha.-olefin is the absence of ethylene and thereafter contacted withethylene or, is initially contacted with a mi?ture of C3 - C20 .alpha.-olefin and ethylene; and a catalyst for such polymerization.
277888
Berzen Josef
Birnkraut Hans-Walter
Hetkamp Gunter
Lutze Siegfried
Schneller Peter
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