Activator comprising a dialkylaluminum monofluoride for the poly

Details Activator comprising a dialkylaluminum monofluoride for the poly Activator comprising a dialkylaluminum monofluoride for the poly

1983-05-09

1985-05-14

Smith, Edward J.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526125, 526352, C08F 464, C08F 1002

Patent

active

045173460

ABSTRACT:
A polymerization activator for polymerizing ethylene comprising a dialkylaluminum monofluoride mixed with minor amounts of at least one of dialkylaluminum hydride or halide and a trialkylaluminum. The activator preferably corresponds to the general formula (AlR.sub.2 F)(AlR.sub.2 H).sub.b (AlR.sub.3).sub.c or the general formula (AlR.sub.2 F)(AlR.sub.2 X).sub.a wherein R is an alkyl group having 1 to 12 carbon atoms, 0.1.ltoreq.b.ltoreq.0.4, 0.05.ltoreq.c.ltoreq.0.2, X is a halogen other than fluorine, and 0.1.ltoreq.a.ltoreq.0.4. The activator is used in a catalytic system including at least one halide of a transition metal of Group IVB to VIB, the valency of the metal in the halide being not more than 3 and the atomic ratio of aluminum in the activator to transition metal in the catalyst lying between 0.1 and 10. The catalytic system is used in a high pressure and temperature process for polymerizing or copolymerizing ethylene.

REFERENCES:
patent: 3047557 (1962-07-01), Rust et al.
patent: 3536686 (1970-10-01), Sasaki et al.
patent: 3723350 (1973-03-01), Schmitt et al.
patent: 3723403 (1973-03-01), Greaves et al.
patent: 4133944 (1979-01-01), Cooper et al.

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