Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Patent
1982-11-22
1984-10-09
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, 526151, 526152, 526127, 526352, C08F 402, C08F 1002
Patent
active
044762887
ABSTRACT:
A catalyst comprising the product obtained by bringing into contact (a) a compound of magnesium comprising at least one species selected from the group consisting of magnesium monohalides (MgX), halo-magnesium hydrides (HMgX) and magnesium hydride (MgH.sub.2), X being a halogen and the said species MgX or HMgX being obtained by thermal decomposition of a powdery organo-magnesium halide R.sub.1 MgX wherein R.sub.1 is an organic radical; and (b) at least one halide of a transistion metal selected from the group consisting of titanium and vanadium, the valency of said metal in said halide being lower than or equal to 3, the quantities of (a) and (b) being such that the atomic ratio of magnesium to said transistion metal is between 1 and 25, and a catalyst system including the catalyst that is suitable for use in the polymerization of olefins and particularly ethylene.
REFERENCES:
patent: 3050471 (1962-08-01), Anderson et al.
patent: 3995098 (1976-11-01), Avaro et al.
patent: 4113654 (1978-09-01), Mays et al.
patent: 4187254 (1980-02-01), Bujadoux et al.
Smith Edward J.
Societe Chimique des Charbonnages--CdF Chimie
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