US 11,939,287 B2
Recovery of monomeric and oligomeric building blocks from polymeric materials
Umesh Upendra Choudhary, Santa Cruz, CA (US)
Assigned to Align Technology, Inc., San Jose, CA (US)
Filed by Align Technology, Inc., San Jose, CA (US)
Filed on Jun. 24, 2022, as Appl. No. 17/849,171.
Claims priority of provisional application 63/214,717, filed on Jun. 24, 2021.
Prior Publication US 2023/0029131 A1, Jan. 26, 2023
Int. Cl. C07C 67/08 (2006.01); C07C 67/54 (2006.01); A61C 7/08 (2006.01)
CPC C07C 67/08 (2013.01) [C07C 67/54 (2013.01); A61C 7/08 (2013.01)] 27 Claims
 
1. A method of recovering a pendant group from a polymer, the method comprising:
providing the polymer comprising the following pendant group:

OG Complex Work Unit Chemistry
hydrolyzing a bond coupling the pendant group to the backbone of the polymer to produce a mixture; and
recovering the pendant group from the mixture.