US Patent Issued to MITSUI CHEMICALS on Jan. 27 for "Bleaching agent, preparation and use of the same with polymerizable compositions for optical materials" (Italian, Dutch Inventors)

ALEXANDRIA, Va., Jan. 28 -- United States Patent no. 12,534,548, issued on Jan. 27, was assigned to MITSUI CHEMICALS INC. (Tokyo).

"Bleaching agent, preparation and use of the same with polymerizable compositions for optical materials" was invented by Andrea Vecchione (Ravenna, Italy), Roberto Forestieri (Ravenna, Italy), Francesco Mariani (Ravenna, Italy) and Willem Bos (Arnhem, Netherlands).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention relates to a bleaching agent comprising: (A) a polymerizable component comprising an aromatic ester compound including two or more allyloxycarbonyl groups, (B) a colouring component comprising particles of a blue pigment (b1), (C) a polymeric dispersing...