Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
252429B, 252429C, 526151, 526352, 526906, C08F 402, C08F 1002
An organic halide is reacted with magnesium metal in the absence of an ether or other complexing diluent, preferably in the absence of any extraneous diluent to produce a magnesium reducing agent. In one embodiment, the halide is added dropwise to the magnesium metal. The resulting magnesium reducing agent is then washed with an unreactive liquid hydrocarbon. An organoaluminum compound is mixed with the magnesium reducing agent either before or after the washing. The resulting cocatalyst produced by contacting the magnesium reducing agent with the organoaluminum compound is contacted with a titanium tetrahalide to give a catalyst. This catalyst is useful in the polymerization of 1-olefins and is of particular utility in the polymerization of ethylene at high productivity rates.
patent: 3392162 (1968-07-01), Ziegler et al.
patent: 3737393 (1973-06-01), de Vries
Glaze et al., J. Organometal Chem. 5 (1966), pp. 477-480.
Dietz Richard E.
Nowlin Oscar D.
Phillips Petroleum Company
Smith Edward J.
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