US 11,981,774 B2
Crosslinked polymer and related methods thereof
Satyasankar Jana, Singapore (SG); Jayasree Seayad, Singapore (SG); Abdul Majeed Seayad, Singapore (SG); and Ping Sen Choong, Singapore (SG)
Assigned to AGENCY FOR SCIENCE, TECHNOLOGY AND RESEARCH, Singapore (SG)
Appl. No. 17/043,448
Filed by AGENCY FOR SCIENCE, TECHNOLOGY AND RESEARCH, Singapore (SG)
PCT Filed Mar. 29, 2019, PCT No. PCT/SG2019/050183
§ 371(c)(1), (2) Date Sep. 29, 2020,
PCT Pub. No. WO2019/190408, PCT Pub. Date Oct. 3, 2019.
Claims priority of application No. 10201802688T (SG), filed on Mar. 29, 2018; and application No. 10201802689R (SG), filed on Mar. 29, 2018.
Prior Publication US 2021/0024698 A1, Jan. 28, 2021
Int. Cl. C08G 71/04 (2006.01); C07D 405/14 (2006.01); C07D 407/14 (2006.01); C08F 283/00 (2006.01); C09D 175/12 (2006.01)
CPC C08G 71/04 (2013.01) [C07D 405/14 (2013.01); C07D 407/14 (2013.01); C08F 283/00 (2013.01); C09D 175/12 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A method of crosslinking a polyhydroxyurethane (PHU) polymer having a plurality of diene moieties in the backbone, the method comprising:
reacting a crosslinking agent having two or more dienophile moieties with the PHU polymer backbone to form crosslinks between the diene moieties via a plurality of diene-dienophile adducts,
wherein at least a part of the diene-dienophile adduct comprises structure (I):

OG Complex Work Unit Chemistry