ALEXANDRIA, Va., June 18 -- United States Patent no. 12,325,771, issued on June 10, was assigned to JINJIANG ANRUN TEXTILE Co. LTD. (Quanzhou, China).
"Preparation method for biobased polyurethane elastic fibers" was invented by Jinbin Xiao (Quanzhou, China) and Honghui Yin (Quanzhou, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "A preparation method for biobased polyurethane elastic fibers is provided. Polyether polyols are prepared using sucrose, glycerol, dimethylamine, and epoxypropane; adding solvent N, N-dimethylacetamide, polyether polyol, and polyisocyanate to a reaction tank, and obtaining spinning solution by adding p-toluenesulfonyl semicarbazide and aluminum methylene (2,4-di-tert-butylphe...