Spherical ultra high molecular weight polyethylene

Details Spherical ultra high molecular weight polyethylene Spherical ultra high molecular weight polyethylene

1997-05-08

1998-09-15

Wu, David W.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526156, C08F 1002, C08F11002

Patent

active

058079505

ABSTRACT:
A proces for preparing a spherical support for the polymerization of alpha-olefins from an ammonium dawsonite which is spray-dryed and formed into spherical particles which are then calcined and impregnated with titanium to produce a spherical catalyst of good mechanical strength is described. Also described is the polymerization process which, in the presence of the spherical catalyst, yields polyolefin particles which preserve the spherical characteristics of the support, with low flow angle and good bulk density, as well as the product polyethylene obtained from the process.

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