	US 12,252,476 B2
	Bio-based epoxy chain extender and preparation method thereof
Yunxuan Weng, Beijing (CN); Caili Zhang, Beijing (CN); Xiaoqian Diao, Beijing (CN); Zhirui Ma, Beijing (CN); Yu Han, Beijing (CN); and Wei Luo, Beijing (CN)
Assigned to BEIJING TECHNOLOGY AND BUSINESS UNIVERSITY, Beijing (CN)
Filed by BEIJING TECHNOLOGY AND BUSINESS UNIVERSITY, Beijing (CN)
Filed on Jul. 4, 2024, as Appl. No. 18/764,298.
Application 18/764,298 is a continuation of application No. PCT/CN2024/073543, filed on Jan. 23, 2024.
Claims priority of application No. 202310666308.9 (CN), filed on Jun. 7, 2023.
Prior Publication US 2024/0409522 A1, Dec. 12, 2024
Int. Cl. C07D 301/28 (2006.01); C07D 301/32 (2006.01); C07D 303/44 (2006.01); C08G 63/91 (2006.01)

CPC C07D 301/28 (2013.01) [C07D 301/32 (2013.01); C07D 303/44 (2013.01); C08G 63/916 (2013.01)]

6 Claims

1. A preparation method of a bio-based epoxy chain extender, comprising following steps:

(1) mixing ESO and CD and carrying out catalytic reaction to obtain ESO_n-CD; and

(2) mixing and heating the ESO_n-CD with concentrated sulfuric acid, dropwise adding a mixture of glacial acetic acid and hydrogen peroxide for stirring reaction, and after a reaction, carrying out extraction and separation to remove a solvent to obtain the bio-based epoxy chain extender;

wherein the ESO is epoxidized soybean oil; and

the CD is cardanol.