High efficiency catalyst for high bulk density polyethylene

Details High efficiency catalyst for high bulk density polyethylene High efficiency catalyst for high bulk density polyethylene

1979-04-30

1981-09-08

Smith, Edward J.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526124, 5263486, 526352, C08F 402, C08F 1002

Patent

active

042885787

ABSTRACT:
A unique high efficiency catalyst for the polymerization of alpha-olefins has been developed based on the use of methanol treated magnesium oxide as support, an equimolar mixture of titanium tetrachloride and tetrabutyltitanate as titanium source impregnated on the support, and an organoaluminum compound as reducing agent. The polyethylene produced by this catalyst has narrow molecular weight distribution, high bulk density, high melt index, and minimum catalyst residue due to the high polymer to catalyst ratio. The copolymers produced by this catalyst have narrow molecular weight distribution, but have lower bulk density, low melt index and low density.

REFERENCES:
patent: 3694421 (1972-09-01), Vetter
patent: 4016344 (1977-04-01), Kochhar et al.
patent: 4056668 (1977-11-01), Berger et al.
patent: 4103078 (1978-07-01), Sato et al.
patent: 4167493 (1979-09-01), Hsieh

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