Molecular weight distribution modification in a tubular reactor

Details Molecular weight distribution modification in a tubular reactor Molecular weight distribution modification in a tubular reactor

1987-05-04

1988-11-22

Ivy, C. Warren

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526 64, 526 66, 526 67, 526 72, 5261692, 526280, 526348, 5263482, 526918, 526922, 525197, 525240, 525236, 525 52, 525 53, 252 43, C08F 200, C08F 1000

Patent

active

047866977

ABSTRACT:
Polymodal MWD ethylene copolymer comprising at least two modes of differing molecular weights. Each mode has at least one of M.sub.w /M.sub.n of less than 2.0, and a M.sub.z /M.sub.w of less than 1.8. The polymodal character of the copolymer is achieved by either (1) withdrawing polymer modes from the reactor from at least one takeoff port, and blending such modes with the reactor effluent, or (2) utilizing at least two catalyst species in the reaction to produce modes of differing molecular weights.

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