ALEXANDRIA, Va., March 19 -- United States Patent no. 12,252,476, issued on March 18, was assigned to BEIJING TECHNOLOGY AND BUSINESS UNIVERSITY (Beijing).

"Bio-based epoxy chain extender and preparation method thereof" was invented by Yunxuan Weng (Beijing), Caili Zhang (Beijing), Xiaoqian Diao (Beijing), Zhirui Ma (Beijing), Yu Han (Beijing) and Wei Luo (Beijing).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present disclosure provides a bio-based epoxy chain extender and a preparation method thereof, belonging to the technical field of chain extenders, and the preparation method includes the following steps: (1) mixing ESO and CD and carrying out catalytic reaction to obtain ESOn-CD; and (2) mixing an...