	US 11,702,501 B2
	Methods for making recyclable and depolymerizable polymer network materials via thiourethane dynamic chemistry
John M. Torkelson, Skokie, IL (US); Lingqiao Li, Houston, TX (US); and Xi Chen, Evanston, IL (US)
Assigned to Northwestern University, Evanston, IL (US)
Filed by Northwestern University, Evanston, IL (US)
Filed on Jun. 26, 2020, as Appl. No. 16/913,635.
Claims priority of provisional application 62/867,684, filed on Jun. 27, 2019.
Prior Publication US 2020/0407482 A1, Dec. 31, 2020
Int. Cl. C08G 18/38 (2006.01); C08J 11/12 (2006.01); C08G 18/76 (2006.01); C08G 18/16 (2006.01); C08G 18/18 (2006.01); C08G 18/20 (2006.01); C08G 18/48 (2006.01); C08G 18/10 (2006.01)

CPC C08G 18/3855 (2013.01) [C08G 18/10 (2013.01); C08G 18/161 (2013.01); C08G 18/168 (2013.01); C08G 18/1858 (2013.01); C08G 18/2063 (2013.01); C08G 18/3876 (2013.01); C08G 18/4825 (2013.01); C08G 18/7621 (2013.01); C08J 11/12 (2013.01); C08J 2375/04 (2013.01); C08J 2381/00 (2013.01); Y02W 30/62 (2015.05)]

26 Claims

1. A polythiourethane composition comprising:

a polythiourethane polymer network comprising polymer chains crosslinked by crosslinks comprising a non-aromatic branched core and free thiol groups, wherein the polymer chains are covalently linked to the crosslinks via thiourethane linkages; and

a first catalyst that catalyzes reactions between thiol groups and isocyanate groups, wherein the first catalyst is not an organophosphine.