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US 5,476,914 AGranted
Syndiotactic polypropylene
AssigneeFina Technology, Inc.
InventorsJohn A. Ewen, Abbas Razavi
Life of this patent
Estimating the term…
Abstract
The invention provides for highly crystalline syndiotactic polypropylene comprising a high percentage of racemic (r) dyads. The high crystallinity may be due to the polymerization mechanism of metallocene catalysts of a particular structure which appear to produce syndiotactic polypropylene of a new microstructure.
Claims4
Syndiotactic polypropylene having a value greater than or equal to 0.83.
Syndiotactic polypropylene having a value from about 0.75 to 0.95.
Dependencies are inferred from the claim text.