US Patent Issued to WANHUA CHEMICAL GROUP on Feb. 24 for "Sulfonic acid-modified polyisocyanate and preparation method therefor" (Chinese Inventors)

ALEXANDRIA, Va., Feb. 24 -- United States Patent no. 12,559,453, issued on Feb. 24, was assigned to WANHUA CHEMICAL GROUP Co. LTD. (YEDA Yantai, China).

"Sulfonic acid-modified polyisocyanate and preparation method therefor" was invented by Xundi Yin (YEDA Yantai, China), Xueshun Ji (YEDA Yantai, China), Yunquan Jin (YEDA Yantai, China), Cuicui Wang (YEDA Yantai, China), Rubao Shen (YEDA Yantai, China) and Yuyang Cao (YEDA Yantai, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "Disclosed are a sulfonic acid-modified polyisocyanate and a preparation method thereof. By controlling a content of cyclohexylamine component in the raw material, the reaction rate of sulfamic acid and polyisocyanate is accelerat...