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US 8,026,317 B2Granted
Isotactic specific catalyst for direct production of highly isotactic poly (propylene oxide) or highly isotactic poly (butylene oxide)
AssigneeCornell Research Foundation, Inc.
InventorsGeoffrey W. Coates, Scott D. Allen, Claire Cohen, Kathryn Peretti, Hiroharu Ajiro
Life of this patent
Estimating the term…
Abstract
(Salph or methoxy salph) Co (initiating ligand) catalyze homopolymerizing rac-PO to produce pure highly isotactic PPO and rac-1-butylene oxide to produce pure isotactic poly(butylene oxide). A product is unfractionated isotactic PPO of m-dyad content >81%, normally at least 99%.
Claims11
Isotactic PPO having m-dyad content greater than 90% and Mn greater than 150,000.
Isotactic PPO having m-dyad content greater than 90% and PDI less than 1.50.
Dependencies are inferred from the claim text.