Polymerization of olefins with pre-activated catalysts

Details Polymerization of olefins with pre-activated catalysts Polymerization of olefins with pre-activated catalysts

1975-09-18

1977-08-16

Schofer, Joseph L.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526348, 526350, 526351, 526352, C08F21000, C08F21200

Patent

active

040427714

ABSTRACT:
A method for the polymerization of olefins using a catalyst in the form of a solid compound of a transition metal in which the transition metal is at least partially reduced to a valency state lower than the maximum valency state, with the transition metal compound being subjected prior to use to pre-activation by contact with magnesium and one or more halogenated hydrocarbons and one or more organo-metallic compounds of Groups II and III.

REFERENCES:
patent: 2927105 (1960-03-01), Nienburg et al.
patent: 3101328 (1963-08-01), Edmonds
patent: 3392159 (1968-07-01), Schooley
patent: 3562239 (1971-02-01), DE Jong et al.
Doak et al., in "Crystalline Olefin Polymer", Part I, (Interscience, New York, 1965), pp. 366-371.

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