Polypropiolactones and methods of preparation
AssigneeNovomer, Inc.
InventorsChristopher A. DeRosa, Eric Stoutenburg, Lisa B. Todd, Catherine A. Falkner
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Abstract
Disclosed are methods of efficiently making poly(3-hydroxypropionate) and related copolymers from beta propiolactone utilizing carboxylate salts of an onium cation. In another aspect, the present invention provides polymerization systems comprising combinations of initiators and monomers that together enable the efficient production of poly(3-hydroxypropionate) and related copolymers. Disclosed are novel polymer compositions having structures and/or compositional characteristics that differentiate them from previously produced polymers and polymer compositions.
Claims26
1-31. (canceled)
A method comprising contacting one or more of beta propiolactone, substituted betapropiolactones, and optionally, comonomers with one or more carboxylate salts of an onium cation in a non-polar solvent having a polarity of less than 0.2;
- under conditions to prepare one or more polymers comprising one or more polymer chains having ring opened beta propiolactone and/or substituted betapropiolactone units and having on one end of the chains a residue of carboxylate salt of an onium cation covalently bonded to the one end of the polymer chains:
- wherein the ratio of the one or more of beta propiolactone and/or substituted betapropiolactones and comonomers to the one or more carboxylate salt of an onium cation is from about 100 to 1 to about 1,000,000 to 1.
(canceled)
35-36. (canceled)
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50-51. (canceled)
Dependencies are inferred from the claim text.