Manufacture of ethylene polymers in a two-zone tubular reactor a

Details Manufacture of ethylene polymers in a two-zone tubular reactor a Manufacture of ethylene polymers in a two-zone tubular reactor a

1976-11-15

1978-02-28

Holler, Alan

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

Synthetic resins

Polymerizing in tubular or loop reactor

526 65, 526 86, C08F 428, C08F 1002

Patent

active

040769194

ABSTRACT:
Ethylene polymers are manufactured in a tubular reactor under high pressure and at high temperatures in the presence of polymerization initiators. The polymerization is carried out in two different zones of the reactor, a mixture of ethylene, oxygen and regulator being fed into the first zone and a co-initiator having a half-life temperature, measured in benzene, of above 140.degree. C being additionally fed into the second zone. The co-initiator may be a peroxide or a hydroperoxide. The melt index, or the haze and gloss of a film produced from the resulting ethylene polymer, can be varied advantageously through the choice of the co-initiator.

REFERENCES:
patent: 3142666 (1964-07-01), Deex
patent: 3293233 (1966-12-01), Erchak, Jr. et al.
patent: 3334081 (1967-08-01), Madgwick et al.
patent: 3546189 (1970-12-01), Ratzsch et al.
patent: 3657212 (1972-04-01), Steigerwald et al.
patent: 3702845 (1972-11-01), Steigerwald et al.

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