CATALYSTS AND METHODS FOR POLYESTER PRODUCTION
First Claim
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1. A method for the copolymerization of an epoxide and carbon monoxide comprising the steps of:
- a) providing an epoxide;
b) contacting the epoxide with carbon monoxide in the presence of a metal carbonyl compound and a polymerization initiator wherein the epoxide is provided in a molar excess relative to the polymerization initiator, and the polymerization initiator is provided in a molar excess relative to the metal carbonyl compound; and
c) producing a polyester product comprising a polymer of formula
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Abstract
Disclosed are polymerization systems and methods for the formation of polyesters from epoxides and carbon monoxide. The inventive polymerization systems feature the combination of metal carbonyl compounds and polymerization initiators and are characterized in that the molar ratios of metal carbonyl compound, polymerization initiators and provided epoxides are present in certain ratios.
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Citations
22 Claims
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1. A method for the copolymerization of an epoxide and carbon monoxide comprising the steps of:
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a) providing an epoxide; b) contacting the epoxide with carbon monoxide in the presence of a metal carbonyl compound and a polymerization initiator wherein the epoxide is provided in a molar excess relative to the polymerization initiator, and the polymerization initiator is provided in a molar excess relative to the metal carbonyl compound; and c) producing a polyester product comprising a polymer of formula - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A polymerization system for the copolymerization of epoxides and carbon monoxide, the system comprising:
- an epoxide, a metal carbonyl compound, and a polymerization initiator, characterized in that the epoxide is present in a molar excess relative to the polymerization initiator and the polymerization initiator is present in a molar excess relative to the metal carbonyl compound.
- View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22)
Specification