US 12,338,318 B2
Polypropiolactones and methods of preparation
Christopher A. DeRosa, Rochester, NY (US); Eric Stoutenburg, Rochester, NY (US); Lisa B. Todd, Rochester, NY (US); and Catherine A. Falkner, Rochester, NY (US)
Assigned to Novomer, Inc., Rochester, NY (US)
Appl. No. 18/286,264
Filed by Novomer, Inc., Rochester, NY (US)
PCT Filed Apr. 12, 2022, PCT No. PCT/US2022/024398
§ 371(c)(1), (2) Date Oct. 10, 2023,
PCT Pub. No. WO2022/221266, PCT Pub. Date Oct. 20, 2022.
Claims priority of provisional application 63/175,667, filed on Apr. 16, 2021.
Prior Publication US 2024/0228695 A1, Jul. 11, 2024
Int. Cl. C08G 63/08 (2006.01)
CPC C08G 63/08 (2013.01) 10 Claims
 
1. A polymer 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 a carboxylate anion covalently bonded to the one end of the polymer chains;
wherein the polymer comprises chains according to the formula:

OG Complex Work Unit Chemistry
wherein: A is separately in each occurrence a polymer chain having ring opened beta propiolactone and/or substituted betapropiolactone units;
R20 is separately in each occurrence a hydrocarbyl group which is optionally substituted; and
w is separately in each occurrence a number of 1 or greater:
wherein the polymer exhibits one or more of the polymer is polymorphic having DSC peaks at from 73 to 83° C. and from 110 to 125° C. or the polymers are crosslinked by one or more polyepoxides or polylactones.