Compositions – Preservative agents – Anti-oxidants or chemical change inhibitants
Patent
1977-01-27
1980-02-26
Garvin, Patrick
Compositions
Preservative agents
Anti-oxidants or chemical change inhibitants
252429C, 526142, 526143, C08F 464
Patent
active
041905555
ABSTRACT:
A method is disclosed for preparing a catalyst system for polymerizing .alpha.-olefins. This method comprises admixing with at least an organoaluminum compound an activated titanium component which is prepared by first reacting a titanium compound of the general formula, TiX.sub.n (OR).sub.4-n (in which X is a halogen atom, R is an alkyl group or a phenyl group, and n is 2 to 4), with a metal of Group II or III of the Periodic Table and a halide of a metal of Group II or III of the Periodic Table in the presence of an aromatic compound, then treating the resulting reaction product with an oxygen-containing organic compound, and further treating with a tetrahalide of titanium, vanadium or both at a temperature of from -80.degree. C. to 80.degree. C., and finally aging at a temperature above 30.degree. C. for from 30 minutes to 24 hours.
REFERENCES:
patent: 3492281 (1970-01-01), Smith et al.
patent: 3769233 (1973-10-01), Hermans et al.
patent: 3984350 (1976-10-01), Karayannis et al.
Natta et al., Gazz. Chim. Ital., 89 (1959) pp. 2065-2075.
Smith et al., J. Polymer. Sci. Part A-I, vol. 7 (1969) pp. 707-713.
Hamada Hakusei
Inada Tetsuro
Kitamura Kiyoyuki
Kodama Kunio
Takamura Yoshinori
Garvin Patrick
Mitsui Toatsu Chemicals Incorporated
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