Gas phase polymerization of olefins

Details Gas phase polymerization of olefins Gas phase polymerization of olefins

1996-06-03

2000-02-15

Wu, David W.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526 65, 526129, 526160, 526901, 526280, 526281, 526282, 526943, 502155, 502120, 525 53, C08F 234

Patent

active

060254483

ABSTRACT:
A gas phase fluidized bed process is described for producing ethylene polymers having improved processability and an MWD of less than about 2.9. Multiple reactors in series or parallel may be used to produce in-situ blended polymers. Each reactor can separately have a constrained geometry catalyst or a conventional Ziegler-Natta catalyst as needed for obtaining in-situ blended polymer with the desired properties as long as there is a constrained geometry catalyst in at least one reactor. Olefin polymers can be produced according to this invention which have low susceptibility to melt fracture, even under high shear stress conditions.

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