Compositions – Preservative agents – Anti-oxidants or chemical change inhibitants
Patent
1976-03-26
1978-11-07
Garvin, Patrick
Compositions
Preservative agents
Anti-oxidants or chemical change inhibitants
252431R, 252431C, 252431N, 526114, 526125, C08F 464, C08F 468
Patent
active
041245326
ABSTRACT:
New catalysts for the polymerization and copolymerization of olefins are disclosed. The catalysts are prepared from (1) a new class of metal complexes of general formula M.sub.m M'X.sub.2m Y.nE, in which M is Mg, Mn and/or Ca; m is a number from 0.5 to 2.0; M' is Ti, V and/or Zr; X is Cl, Br or I; Y is one or more atoms or groups of atoms of various kinds in an amount such as to satisfy the valence of M'; n is a number from 0.5m to 20m; and E is an electron-donor compound; and (2) organometallic compounds of metals belonging to one of Groups I to III of the Mendelyeev Periodic Table.
REFERENCES:
patent: 3583958 (1971-06-01), Sasaki et al.
patent: 3755284 (1973-08-01), Yamawaki et al.
patent: 3859231 (1975-01-01), Kochhar et al.
patent: 3989881 (1976-11-01), Yamaguchi et al.
Lapporte et al., J. Org. Chem., 28 (Jul. 1963), pp. 1947-1948.
Albizzati Enrico
Giannini Umberto
Parodi Sandro
Pirinoli Franco
Garvin Patrick
Montedison S.p.A.
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