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 2 F)(AlR 2 H) b (AlR 3 ) c or the general formula (AlR 2 F)(AlR 2 X) a wherein R is an alkyl group having 1 to 12 carbon atoms, 0.1≦b≦0.4, 0.05≦c≦0.2, X is a halogen other than fluorine, and 0.1≦a≦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.
Inventors
👤 Karel Bujadoux
Bibliographic Details
Application Number—
JurisdictionUS
Data Sourcegoogle_patents
Last Synchronized2026-11-01 05:48
CPC Classifications
C; C08; C08F; C08F10/00; C08F10/02
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
79 words
A polymerization activator comprising at least one organoaluminum compound selected from the group consisting of: (i) compounds having the formula (AlR 2 F)(AlR 2 H) b (AlR 3 ) c wherein R is an alkyl group having 1 to 12 carbon atoms, 0.1≦b≦0.4, and 0.05≦c≦0.2, and (ii) compounds having the formula (AlR 2 F)(AlR 2 X) a wherein R is an alkyl group having from 1 to 12 carbon atoms, X is a halogen other than fluorine, and 0.1≦a≦0.4.
Claim 2
Dependent Claim
79 words
A polymerization activator comprising at least one organoaluminum compound selected from the group consisting of: (i) compounds having the formula (AlR 2 F)(AlR 2 H) b (AlR 3 ) c wherein R is an alkyl group having 1 to 12 carbon atoms, 0.1≦b≦0.4, and 0.05≦c≦0.2, and (ii) compounds having the formula (AlR 2 F)(AlR 2 X) a wherein R is an alkyl group having from 1 to 12 carbon atoms, X is a halogen other than fluorine, and 0.1≦a≦0.4.
Claim 3
Dependent Claim
11 words
A polymerization activator according to claim 1, wherein X is chlorine.
Claim 4
Dependent Claim
95 words
A catalytic system for the polymerization of ethylene and the copolymerization of ethylene with an α-olefin having from 3 to 8 carbon atoms, comprising at least one organoaluminum activator compound and at least one halide of a transition metal of Group IV B to VI B of the Periodic System, the valency of said metal in said 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, wherein said activator is an activator according to claim 1 or 2.