Novomer, Inc.

Saudi Aramco Technologies Company

Jeffrey R Conuel

Scott D Allen

Anna E Cherian

David E Decker

Robert E Lapointe

The present disclosure is directed to, in part, an aliphatic polycarbonate polymerization reaction initiated by combining an epoxide with carbon dioxide in the presence of a catalytic transition metal-ligand complex to form a reaction mixture, and further quenching that polymerization reaction by contacting the reaction mixture with an acid containing a non-nucleophilic anion produces a crude polymer solution with improved stability and processability.

Aliphatic polycarbonate quench method

The present invention provides polycarbonate compositions having a tunable decomposition temperature. Suitable cationic additives (e.g., phosphonium, phosphazene, quaternary ammonium, guanidinium, pyridinium, arsonium, etc.) are disclosed for lowering the decomposition temperature of polymer compositions. The invention further provides methods of preparing such polymer compositions with tunable decomposition temperatures.

Tunable polymer compositions

The present disclosure provides, in part, a method for removing a catalyst from a product of catalyzed aliphatic polycarbonate polymerization reaction.

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Ithaca, NY, United States of America

Jeffrey R Conuel