US Patent Issued to DOW GLOBAL TECHNOLOGIES, ROHM AND HAAS on July 29 for "Multistage emulsion polymer and process of preparing the same" (Chinese Inventors)

ALEXANDRIA, Va., July 30 -- United States Patent no. 12,371,515, issued on July 29, was assigned to DOW GLOBAL TECHNOLOGIES LLC (Midland, Mich.) and ROHM AND HAAS COMPANY (Collegeville, Pa.).

"Multistage emulsion polymer and process of preparing the same" was invented by Han Liu (Shanghai), Yuehan Hu (Shanghai), Zhi Juan Gong (Shanghai), Ling Li (Louyang, China), Xiangting Dong (Shanghai) and Hengtong Wei (Shanghai).

According to the abstract* released by the U.S. Patent & Trademark Office: "A multistage emulsion polymer comprising a first polymer and a second polymer comprising structural units of a nitrogen-containing heterocyclic monomer at specific weight ratios of the first polymer to the second polymer and a Tg difference between th...