Method for producing ethylene homopolymers and copolymers by...

Details Method for producing ethylene homopolymers and copolymers by... Method for producing ethylene homopolymers and copolymers by...

2005-05-17

2005-05-17

Cheung, William K. (Department: 1713)

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

Synthetic resins

Polymerizing in tubular or loop reactor

C526S065000, C526S348000, C526S352000

Reexamination Certificate

active

06894126

ABSTRACT:
The invention relates to a process for preparing ethylene homopolymers and ethylene copolymers in a tube reactor at pressures above 1000 bar and temperatures in the range from 120 to 400° C. by free-radical addition polymerization, in which first small amounts of free-radical chain initiator are supplied to a streaming flow medium comprising ethylene, molar mass regulator, and, if desired, polyethylene, after which the polymerization takes place. The invention takes place at a pressure in the range from 2000 to 3500 bar and comprises reaction mixture within the tube reactor passing through a temperature profile in the range from 100 to 350° C.

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