Compositions – Preservative agents – Anti-oxidants or chemical change inhibitants
Patent
1978-10-31
1980-07-29
Garvin, Patrick
Compositions
Preservative agents
Anti-oxidants or chemical change inhibitants
252429C, 526125, C08F 402, C08F 464
Patent
active
042150132
ABSTRACT:
The invention relates to a catalyst system and process for the polymerization of 1-alkenes or the copolymerization of 1-alkenes with each other or with ethylene, wherein use is made of a catalyst system that contains a titanium halogenide component on an at least virtually anhydrous magnesium halogenide support and an organoaluminum component containing a complex of an organic aluminum compound with an ester of an oxygen-containing organic acid characterized in that the support used is a magnesium halogenide that is also at least virtually free of magnesium oxide and which has been prepared by heating a magnesium halogenide containing water and/or magnesium oxide in a gaseous flow of carbon halogenide vapor and/or a mixture of carbon monoxide and a halogen.
The process according to the invention offers a high polymer yield per gram of Ti compound used and with very high contents of isotactic polymer.
REFERENCES:
patent: 1702301 (1929-02-01), Jaeger et al.
patent: 3549717 (1970-12-01), Itakura et al.
patent: 3591656 (1971-07-01), Kroll
patent: 3953414 (1976-04-01), Galli et al.
patent: 4107415 (1978-08-01), Giannini et al.
Garvin Patrick
Stamicarbon B.V.
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