US Patent Issued to Rohm and Haas on Dec. 9 for "Aqueous dispersion of opacifying pigment particles and colorant" (Pennsylvania Inventors)

ALEXANDRIA, Va., Dec. 9 -- United States Patent no. 12,492,304, issued on Dec. 9, was assigned to Rohm and Haas Co. (Collegeville, Pa.).

"Aqueous dispersion of opacifying pigment particles and colorant" was invented by Qing Zhang (Collegeville, Pa.) and Yujie Lu (Blue Bell, Pa.).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention relates to a composition comprising 1) an aqueous dispersion of multistage opacifying polymer particles with a superposing binder layer; 2) a colorant; and 3) inorganic opacifying pigment particles. The composition of the present invention is useful for one coat hide paint formulations."

The patent was filed on Sept. 24, 2021, under Application No. 18/027,673.

*For...