US Patent Issued to MITSUI CHEMICALS on Dec. 16 for "Method of producing polyamine compound and application thereof" (Japanese Inventors)

ALEXANDRIA, Va., Dec. 16 -- United States Patent no. 12,497,357, issued on Dec. 16, was assigned to MITSUI CHEMICALS INC. (Tokyo).

"Method of producing polyamine compound and application thereof" was invented by Masakazu Murakami (Omuta, Japan), Shotaro Nakano (Omuta, Japan) and Shinnosuke Nakai (Omuta, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A method of producing a polyamine compound, the method including: a first step of generating a polyurea compound by reacting a thiourethane resin and an amine compound A with each other; and a second step of generating a polyamine compound by reacting the polyurea compound and an amine compound B with each other."

The patent was filed on Feb. 5, 2021, unde...