Process for producing polymers with multimodal molecular weight

Details Process for producing polymers with multimodal molecular weight Process for producing polymers with multimodal molecular weight

1994-04-01

1997-07-15

Weber, Thomas R.

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

Synthetic resins

Polymerizing in two or more physically distinct zones

526 86, C08F 214

Patent

active

056484380

ABSTRACT:
The invention provides a continuous process for catalytically polymerizing a monomer feed of ethylene and at least one comonomer which comprises introducing a catalyst including a bulky ancillary ligand transition metal compound and monomer feed in an upstream reaction zone for polymerization, introducing further catalyst in a downstream reaction zone for further polymerization, the peak temperature in the downstream reaction zone being at least 50.degree. C. higher than in the upstream zone and being above 150.degree. C. The process economically produces polymer of good properties which is melt processable.

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Vickroy, et al., "The Separation of SEC Curves of HDPE into Flory Distributions", Journal of Applied Polymer Science, vol. 50, 551-554 (1993).

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