US 12,234,329 B2
Methods for forming lignin prepolymers and lignin resins
Bala Subramaniam, Lawrence, KS (US); Julian R. Silverman, Nyack, NY (US); Andrew M. Danby, East Yorkshire (GB); Thomas Binder, Marion, IA (US); and Steffan Green, Lawrence, KS (US)
Assigned to University of Kansas, Lawrence, KS (US)
Filed by University of Kansas, Lawrence, KS (US)
Filed on Dec. 17, 2021, as Appl. No. 17/554,056.
Application 17/554,056 is a continuation in part of application No. PCT/US2020/038667, filed on Jun. 19, 2020.
Claims priority of provisional application 63/209,539, filed on Jun. 11, 2021.
Claims priority of provisional application 62/864,741, filed on Jun. 21, 2019.
Claims priority of provisional application 62/863,987, filed on Jun. 20, 2019.
Prior Publication US 2022/0112339 A1, Apr. 14, 2022
Int. Cl. C08J 3/00 (2006.01)
CPC C08J 3/00 (2013.01) [C08J 2397/00 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A method of forming a lignin prepolymer, the method comprising:
adding an acid to an ozonized reaction mixture, the ozonized reaction mixture comprising ozonized lignin having a backbone, and aromatic monomers cleaved from a lignin, under conditions to react the cleaved aromatic monomers with the backbone of the ozonized lignin to form a lignin prepolymer.