High efficiency catalyst for polymerizing olefins

Details High efficiency catalyst for polymerizing olefins High efficiency catalyst for polymerizing olefins

1980-06-02

1981-12-29

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, 526128, 526132, 526133, 526137, 526144, 526150, 526151, 526352, C08F 464, C08F 1000

Patent

active

043083692

ABSTRACT:
Olefins are polymerized in the presence of a catalyst prepared by reacting tetravalent titanium compounds such as a titanium tetraalkoxide, an anhydrous zinc compound such as diethyl zinc, an organomagnesium component such as a hydrocarbon soluble complex of dialkyl magnesium and an alkyl aluminum and a halide source such as a hydrogen halide or an alkyl aluminum halide and an aluminum compound if the halide source or organomagnesium component does not contain sufficient quantities of aluminum. Polymerization processes employing this catalyst composition do not require conventional catalyst removal steps in order to provide polymers having suitable color and other physical characteristics and these catalysts produce polymers having broader molecular weight distributions than do corresponding catalysts without the anhydrous zinc compound.

REFERENCES:
patent: 3245973 (1966-04-01), Natta et al.
patent: 3252958 (1966-05-01), Giachetti et al.
patent: 3676415 (1972-07-01), Diedrich et al.
patent: 4115319 (1978-09-01), Scata et al.
patent: 4120820 (1978-10-01), Birkelbach

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