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

1981-11-25

1983-08-02

Garvin, Patrick

Compositions

Preservative agents

Anti-oxidants or chemical change inhibitants

526185, 526151, C08F 464

Patent

active

043965326

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: 3462403 (1969-08-01), Pendleton
patent: 3502634 (1970-03-01), Stedefeder
patent: 3790544 (1974-02-01), Maertens et al.
patent: 4093789 (1978-06-01), Kuroda et al.
patent: 4113654 (1978-09-01), Mayr et al.
patent: 4246384 (1981-01-01), Selman

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