Preparation process of syndiotactic polyproplene

Details Preparation process of syndiotactic polyproplene Preparation process of syndiotactic polyproplene

1994-11-10

1995-06-27

Schofer, Joseph L.

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

Synthetic resins

Treating polymer containing material or treating a solid...

528498, C08F 628

Patent

active

054281270

ABSTRACT:
Disclosed herein is a process for preparing a syndiotactic polypropylene comprising washing with a hydrocarbon solvent a polymer obtained by polymerizing propylene in the presence of a catalyst comprising a transition metal compound having an asymmetric ligand. The slurry of the polymer obtained by the polymerization is treated with a .beta.-dicarboxy compound and an alcohol or with an alcohol containing hydrochloric acid gasunder non-aqueous conditions prior to the washing with a hydrocarbon solvent so that the residue of the catalyst used in the polymerization reaction may be rendered soluble in the hydrocarbon solvent, the properties of the resulting syndiotactic polypropylene are improved greatly.

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J. Am. Chem. Soc. 1988 110, pp. 6255-6256 (J. A. Ewen).

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